PUMY P36NKMU4 Split Type Heat Pump Air Conditioners Instruction Manual
- June 1, 2024
- PUMY
Table of Contents
PUMY P36NKMU4 Split Type Heat Pump Air Conditioners
Product Information
Specifications:
- Product Type: Split-Type Heat Pump Air Conditioners
- Refrigerant: HFC R410A
- Model Names: PUMY-P36NKMU4, PUMY-P48NKMU4, PUMY-P60NKMU4, PUMY-HP36NKMU2, PUMY-HP42NKMU2, PUMY-HP48NKMU2
- Service Reference: Same as Model Names
- Edition: Revised Edition-B
- Manual Number: OCH811
Product Usage Instructions
Safety Precautions:
Before starting any repair or maintenance work on the air conditioner, ensure that all power supply circuits are disconnected.
Preparation before Repair Service:
Take precautions when handling electric parts during repair services.
Cautions Related to New Refrigerant (R410A):
- Use new refrigerant pipes and avoid using thin pipes.
- Ensure refrigerant piping is clean and free from contaminants.
- Prevent abrasive components from entering the refrigerant circuit.
- Store piping indoors and keep sealed until brazing.
- Use tools specifically designed for R410A refrigerant.
Refrigerant Charging:
- Charge refrigerant from the liquid phase of the gas cylinder.
- Do not use refrigerant other than R410A to avoid system issues.
General Cautions:
- Ventilate the room in case of refrigerant leaks during operation.
- Avoid using a charging cylinder to maintain refrigerant efficiency.
FAQs
- Q: Can I use refrigerant other than R410A in the air conditioner?
- A: No, using any other refrigerant may cause system malfunctions and is not recommended. Stick to the specified R410A refrigerant.
- Q: What precautions should I take during the repair service?
- A: Ensure all power supply circuits are disconnected before working on the unit. Handle electric parts with care to prevent accidents.
“`
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
HFC
utilized
R410A
December 2023
TECHNICAL & SERVICE MANUAL
No. OCH811
REVISED EDITION-B
[Service Ref.] PUMY-P36NKMU4 PUMY-P48NKMU4 PUMY-P60NKMU4 PUMY-HP36NKMU2 PUMY- HP42NKMU2 PUMY-HP48NKMU2
Revision: · Connectable indoor units
have been added. · Some descriptions
have been in REVISED EDITION-B.
OCH811A is void.
Model name indication
OUTDOOR UNIT
SAFETY PRECAUTION
1-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuit must be disconnected.
Preparation before the repair service
· Prepare the proper tools. · Prepare the proper protectors. · Provide
adequate ventilation. · After stopping the operation of the air conditioner,
turn
off the power-supply breaker. · Discharge the condenser before the work
involving the
electric parts.
Precautions during the repair service
· Do not perform the work involving the electric parts with wet hands.
· Do not pour water into the electric parts. · Do not touch the refrigerant. ·
Do not touch the hot or cold areas in the refrigerating
cycle. · When the repair or the inspection of the circuit needs
to be done without turning off the power, exercise great caution not to touch
the live parts. · When opening or closing the valve below freezing
temperatures, refrigerant may spurt out from the gap between the valve stem
and the valve body, resulting in injuries.
1-2. CAUTIONS RELATED TO NEW REFRIGERANT
Cautions for units utilizing refrigerant R410A
Use new refrigerant pipes.
Avoid using thin pipes.
Make sure that the inside and outside of refrigerant piping is clean and it
has no contaminants such as sulfur, oxides, dirt, shaving particles, etc.,
which are hazard to refrigerant cycle. In addition, use pipes with specified
thickness.
Contamination inside refrigerant piping can cause deterioration of refrigerant
oil, etc.
Follow the instructions below to prevent abrasive components contained in
sandpaper and cutting tools from entering the refrigerant circuit because
those components can cause failures of the compressor and valves.
· To deburr pipes, use a reamer or other deburring tools, not sandpaper.
· To cut pipes, use a pipe cutter, not a grinder or other tools that use
abrasive materials.
· When cutting or deburring pipes, do not allow cutting chips or other foreign
matters to enter the pipes.
· If cutting chips or other foreign matters enter pipes, wipe them off the
inside of the pipes.
Store the piping indoors, and keep both ends of the piping sealed until just
before brazing. (Leave elbow joints, etc. in their packaging.)
If dirt, dust or moisture enters into refrigerant cycle, that can cause
deterioration of refrigerant oil or malfunction of compressor.
Use a vacuum pump with a reverse flow check valve.
Vacuum pump oil may flow back into refrigerant cycle and that can cause
deterioration of refrigerant oil, etc.
Use the following tools specifically designed for use with R410A refrigerant.
The following tools are necessary to use R410A
refrigerant.
Tools for R410A
Gauge manifold
Flare tool
Charge hose
Size adjustment gauge
Gas leak detector
Vacuum pump adaptor
Torque wrench
Electronic refrigerant charging scale
Handle tools with care.
If dirt, dust or moisture enters into refrigerant cycle, that can cause
deterioration of refrigerant oil or malfunction of compressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigerant will change and
the efficiency will be lowered.
Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with a flame, poisonous gases will be released.
OCH811B
2
The refrigerant oil applied to flare and flange connections must be ester oil,
ether oil or alkylbenzene oil in a small amount. If large amount of mineral
oil enters, that can cause deterioration of refrigerant oil, etc.
Charge refrigerant from liquid phase of gas cylinder.
If the refrigerant is charged from gas phase, composition change may occur in
refrigerant and the efficiency will be lowered.
Do not use refrigerant other than R410A.
If other refrigerant (R22, etc.) is used, chlorine in refrigerant can cause
deterioration of refrigerant oil, etc.
Use the specified refrigerant only.
Never use any refrigerant other than that specified. Doing so may cause a
burst, an explosion, or fire when the unit is being used, serviced, or
disposed of. Correct refrigerant is specified in the manuals and on the spec
labels provided with our products. We will not be held responsible for
mechanical failure, system malfunction, unit breakdown or accidents caused by
failure to follow the instructions.
Do not pump down the system when a gas leak has been detected.
The intake of air or other gases causes abnormally high pressure in the
refrigeration cycle, which may cause explosion or injury.
[1] Cautions for service
(1) Perform service after recovering the refrigerant left in unit completely.
(2) Do not release refrigerant in the air. (3) After completing service,
charge the cycle with specified amount of refrigerant. (4) If moisture or
foreign matter might have entered the refrigerant piping during service,
ensure to remove them.
[2] Additional refrigerant charge
When charging directly from cylinder (1) Check that cylinder for R410A on the
market is a syphon type. (2) Charging should be performed with the cylinder of
syphon stood vertically. (Refrigerant is charged from liquid phase.)
Unit
Electronic weighing scale
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No.
Tool name
1 Gauge manifold
2 Charge hose
3 Electronic weighing scale 4 Gas leak detector 5 Adaptor for reverse flow
check 6 Refrigerant charge base 7 Refrigerant cylinder
8 Refrigerant recovery equipment
Specifications · Only for R410A · Use the existing fitting specifications.
(UNF1/2) · Use high-tension side pressure of 768.7 PSIG [5.3 MPa.G] or over. ·
Only for R410A · Use pressure performance of 738.2 PSIG [5.09 MPa.G] or over.
— · Use the detector for R134a, R407C or R410A. · Attach on vacuum pump.
— · Only for R410A · Top of cylinder (Pink) · Cylinder with syphon
—
OCH811B
3
Cautions for refrigerant piping work
New refrigerant R410A is adopted for replacement inverter series. Although the
refrigerant piping work for R410A is same as for R22, exclusive tools are
necessary so as not to mix with different kind of refrigerant. Furthermore as
the working pressure of R410A is 1.6 times higher than that of R22, their
sizes of flared sections and flare nuts are different.
Thickness of pipes Because the working pressure of R410A is higher compared to
R22, be sure to use refrigerant piping with thickness shown below. (Never use
pipes of 7/256 in [0.7 mm] or below.)
1 Diagram below: Piping diameter and thickness
Nominal
Outside
dimensions (in) diameter (mm)
Thickness : in [mm]
R410A
R22
1/4
Ø6.35
1/32 [0.8]
1/32 [0.8]
3/8
Ø9.52
1/32 [0.8]
1/32 [0.8]
1/2
Ø12.70
1/32 [0.8]
1/32 [0.8]
5/8
Ø15.88
5/128 [1.0] 5/128 [1.0]
3/4
Ø19.05
5/128 [1.0]* 5/128 [1.0]
*Use 1/2 H or H pipes.
2 Dimensions of flare cutting and flare nut The component molecules in HFC refrigerant are smaller compared to conventional refrigerants. In addition to that, R410A is a refrigerant, which has higher risk of leakage because its working pressure is higher than that of other refrigerants. Therefore, to enhance airtightness and strength, flare cutting dimension of copper pipe for R410A has been specified separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A also has partly been changed to increase strength as shown below. Set copper pipe correctly referring to copper pipe flaring dimensions for R410A below. For 1/2 and 5/8 inch pipes, the dimension B changes. Use torque wrench corresponding to each dimension.
Dimension A
Dimension B
Flare cutting dimensions
Unit : in [mm]
Nominal
Outside
dimensions (in) diameter (mm)
Dimension
A
(
0 -0.4
)
R410A
R22
1/4
Ø6.35 11/32-23/64 [ 9.1]
9.0
3/8
Ø9.52 1/2-33/64 [13.2] 13.0
1/2
Ø12.70 41/64-21/32 [16.6] 16.2
5/8
Ø15.88 49/64-25/32 [19.7] 19.4
3/4
Ø19.05
—
23.3
Flare nut dimensions
Unit: in [mm]
Nominal
Outside
Dimension B
dimensions (in) diameter (mm) R410A
R22
1/4
Ø6.35
43/64 [17.0] 17.0
3/8
Ø9.52
7/8 [22.0] 22.0
1/2
Ø12.70 1-3/64 [26.0] 24.0
5/8
Ø15.88 1-9/64 [29.0] 27.0
3/4
Ø19.05
—
36.0
3 Tools for R410A (The following table shows whether conventional tools can be used or not.)
Tools and materials
Use
R410A tools
Can R22 tools be used? Can R407C tools be used?
Gauge manifold
Air purge, refrigerant charge Tool exclusive for R410A
Charge hose
and operation check
Tool exclusive for R410A
Gas leak detector
Gas leak check
Tool for HFC refrigerant
Refrigerant recovery equipment Refrigerant recovery
Tool exclusive for R410A
Refrigerant cylinder
Refrigerant charge
Tool exclusive for R410A
Applied oil
Apply to flared section
Ester oil, ether oil and alkylbenzene oil (minimum amount)
Ester oil, ether oil: Alkylbenzene oil: minimum amount
Safety charger
Prevent compressor malfunction Tool exclusive for R410A
when charging refrigerant by
spraying liquid refrigerant
Charge valve
Prevent gas from blowing out Tool exclusive for R410A
when detaching charge hose
Vacuum pump
Vacuum drying and air Tools for other refrigerants can (Usable if equipped
(Usable if equipped
purge
be used if equipped with adop- with adopter for rever- with adopter for rever-
ter for reverse flow check
se flow)
se flow)
Flare tool
Flaring work of piping
Tools for other refrigerants can be used by adjusting
flaring dimension
(Usable by adjusting flaring dimension)
(Usable by adjusting flaring dimension)
Bender
Bend the pipes
Tools for other refrigerants can be used
Pipe cutter
Cut the pipes
Tools for other refrigerants can be used
Welder and nitrogen gas cylinder Weld the pipes
Tools for other refrigerants can be used
Refrigerant charging scale Refrigerant charge
Tools for other refrigerants can be used
Vacuum gauge or thermis- Check the degree of vacuum. (Vacuum Tools for other refrigerants
tor vacuum gauge and valve prevents back flow of oil and refri- can be used
vacuum valve
gerant to thermistor vacuum gauge)
Charging cylinder
Refrigerant charge
Tool exclusive for R410A
: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.)
: Tools for other refrigerants can be used under certain conditions. : Tools for other refrigerants can be used.
OCH811B
4
OVERVIEW OF UNITS
2-1. Auxiliary HEATING ON/OFF CONTROL SET-UP
(1) Auxiliary heating operation controls another heat source that depends on
the main system’s operations,which means the interlock operation shown in “b)”
will be possible.
a) Indoor unit must be R410A UL model for this function to operate. b)
Different Indoor unit applications that can be applied:
OC
PLFY PCFY PKFY PFFY
PEFY
Electric Heating or
Hot water Heating
(2) Outdoor unit DIPSW5-4 for auxiliary heating control: Set DIPSW5-4 when
power is turned off at unit. OFF: Disable auxiliary Heating Function (Initial
setting) ON: Enable auxiliary Heating Function
(3) Determine required indoor fan speed during defrost mode: To set the fan
speed, see the chapter referring to heater control in the indoor unit’s
Technical & Service Manual.
OCH811B
5
(4) Determine fan speed setting during indoor thermo-OFF conditions: a) These settings are done within Indoor DIPSW1-7 and DIPSW1-8, see chart below for options. b) Recommended SW1-7 OFF and SW1-8 ON will determine airflow based on “Setting on the remote controller”.
Auxiliary heating signal
Thermo contidion
SW1-7 SW1-8
OFF
OFF
ON
OFF
Fan speed setting
OFF
Fan speed setting
ON
Very low Low
Setting on remote controller
OC
IC3
RA17°C
20°C Thermo – ON
IC2
RA19°C
IC1
RA21°C
20°C Thermo – ON
20°C Thermo – OFF
OFF ON
ON Setting on remote controller
ON
Stopped
Baseboard Heating
(5) Setting outdoor unit and auxiliary heat switch over temperatures When the
DIPSW 5-4 is set to “ON”, the outdoor unit and the contact output operates as
shown below.
a)Outdoor default setting and operations are shown below:
Amb. decreasing Amb. increasing
Stage 1 – Outdoor unit HP operation – Defrost : Heater contact ON signal – Other than defrost : Contact OFF
Stage 2 – Outdoor unit HP operation – Heater contact ON signal
Stage 3 – Outdoor unit OFF (Standby) – Heater contact ON signal
a
-13°F [-25°C]
b 32°F [0°C]
c 50°F [10°C]
d 68°F [20°C]
TH7 = Outdoor temperature
When the set temperature ranges overlap, the previously set pattern (1, 2 or
3) has a priority. The stage 1 has the highest priority, 2 the second and then
3.
b) Based on above chart listed the sequence of operation on “On ambient
decrease” Stage 1: (TH7 50°F [10°C]): the outdoor unit runs in HP mode. Stage
2: (TH7 = 50 to -13°F [10 to -25°C]): the outdoor unit runs in HP mode with
auxiliary heating. Stage 3: (TH7 -13°F [-25°C]): Auxiliary heating only
(Outdoor unit is OFF).
c) Based on above chart listed the sequence of operation on “On ambient
increase”
Stage 3: (TH7 32°F [0°C]): Auxiliary heating only (Outdoor unit is OFF). Stage
2: (TH7 32 to 68°F [0 to 20°C]): Auxiliary heating with outdoor unit in HP
mode. Stage 1: (TH7 68°F [20°C]): Outdoor unit in HP mode only.
OCH811B
6
(6) Locally procured wiring
A basic connection method is shown.
(i.e. interlocked operation with the electric heater with the fan speed setting on high)
Remote control Board
Relay circuit
Adapter
Indoor unit control board
Red 1
CN24
Outdoor unit control board
Dip switch SW5-4 “ON”
Electric Heater power source Green Yellow
X
Electric Heater
X +
White 2 Red 1
Red 2
CN22
Preparations in the field
Maximum cable length is 10 m (32ft)
For relay X use the specifications given below operation coil
Rated voltage: 12 V DC Power consumption: 0.9 W or less *Use the diode that is recommended by the relay manufacturer at both ends of the relay coil.
The length of the electrical wiring for the PAC-YU24HT is 2 meters (6-1/2 ft)
To extend this length, use sheathed 2-core cable.
Control cable type: CVV, CVS, CPEV, or equivalent.
Cable size: 0.5 mm2 to 1.25 mm2 (AWG22 to AWG16) Do not extend the cable more than 10 meters (32 ft).
Recommended circuit
R
1-phase power supply
S
208V, 230V/60Hz R
S
Wiring diagram
Control board
88H
FS1
88H
FS2 FS1
FS2 88H
CN24
H1 H2 26H
FS1, 2 —– Thermal fuse
H1, H2 —– Heater
26H ——— Overheat protection thermostat
88H ——— Electromagnetic contactor
OCH811B
7
2-2. SYSTEM CONSTRUCTION
Outdoor unit
Applicable Capacity indoor unit Number of units
Total system capacity range
4HP P36NKMU4 HP36NKMU2
04 to 36 1 to 11
4.5HP
5HP
HP42NKMU2
P48NKMU4 HP48NKMU2
04 to 54
1 to 12
50 to 130% of outdoor unit capacity
Model name Number of branches
CMY-Y62-G-E 2
CMY-Y64-G-E 4
CMY-Y68-G-E 8
7HP P60NKMU4
04 to 72
Connectable indoor unit lineup
Model type
Model name
04 05 06 08 12 15 18 24 27 30 36 48 54 72
Ceiling Cassette
4-way flow PLFY-EP NEMU-E
2 by 2
PLFY-P NFMU-E
1-way flow PMFY-P NBMU-E
Ceiling Concealed
PEFY-P NMAU-E
NMSU-E
NMHU-E
Wall Mounted
PKFY-P
NMHSU-E NKMU-E
NLMU-E
Ceiling Suspended
PCFY-P NKMU-E
Floor standing
Exposed PFFY-P Concealed
NEMU-E NRMU-E
Multi-position air handling unit
PVFY-P
- Only PUMY-P60 is connectable.
NAMU-E
Remote controller
Name Model number Functions
M-NET remote controller
PAR-F27MEA-E, PAR-U01MEDU
· A handy remote controller for use in conjunction with the Melans centralized
management system.
· Addresses must be set.
MA remote controller PAR-21MAA, PAR-41MAA · Addresses setting is not necessary.
OCH811B
8
2-3 SYSTEM CONSTRUCTION( BRANCH BOX SYSTEM)
Outdoor unit
Applicable indoor unit
Model name
Horse power Capacity class
P36NKMU4 HP36NKMU2
HP42NKMU2
P48NKMU4 HP48NKMU2
4HP
4.5HP
5HP
Type 06 to Type 36
Caution: The indoor unit which rated capacity exceeds 36 kBtu/ h (Type 36) can NOT be connected.
Number of units
Total system capacity range
2(*1) to 4 33 to 130% of outdoor
unit capacity
12 to 46.8 kBtu/h
2(*1) to 5 29 to 130% of outdoor
unit capacity
12 to 54.6 kBtu/h
2(*1) to 8 25 to 130% of outdoor
unit capacity
12 to 62.4 kBtu/h
Branch box that can Number of units be connected
1 or 2
P60NKMU4 7HP
2(*1) to 8 20 to 130% of outdoor
unit capacity 12 to 78 kBtu/h
Wall-mounted
Model type Deluxe
Designer
Connectable indoor unit lineups (Heat pump inverter type)
Model name
06
09
12
15
18
24
30
36
MSZ-FH06/09/12/15NA, 18NA MSZ-FS·NA
MSZ-EF·NAW(B/S)
Ducted
Standard Low static3 4
MSZ-GL·NA MSZ-GS·NA
SEZ-KD·NA
P-series mid static3 4
PEAD-A·AA
1-way ceiling cassette
MLZ-KY06NA* MLZ-KP09/12/18NA
4-way ceiling cassette
P-series 2222 P-series 3333
Floor standing
Standard Multi-position air handler*2
A-coil
SLZ-KF·NA PLA-A·EA5 MFZ-KJ·NA SVZ-KP·NA PAA-A·A 5
Branch box
Number of branches (Indoor unit that can be connected)
PAC-MKA52/53BC 5 (MAX. 5 units)
Note: A maximum of 2 branch boxes can be connected to 1 outdoor unit.
2- branch pipe (joint), Optional parts
Using 1 branch box Using 2 branch boxes
Model name
MSDD-50AR-E MSDD-50BR-E
Note:Select a model according to the connection method.
PAC-MKA32/33BC 3 (MAX. 3 units)
Note No required
Connection method: flare Connection method: brazing
Option
Optional accessories for indoor units and outdoor units are available.
1 Only one unit connection is possible with ducted unit. 2 When connecting a multi-position unit(s), set additional constraints as follows. For connections other than those specified below, consult your dealer.
Models other than PUMY-P60NKMU4 (For each connected branch box)
Number of connecting multi-position unit
Constraints
2
Any indoor units other than ducted units are not connectable.
PUMY-P60NKMU4 (For each connected branch box)
Number of connecting multi-position unit
Constraints
2
Any indoor units other than ducted unit are not connectable.
· The total system wide capacity should be 130% or below
1
including the ducted unit.
· Only 1 ducted unit can be included in the connection.
· The total system wide capacity should be 100% or
1
below including the ducted unit.
· Only 1 ducted unit can be included in the connection.
3 For PUMY-P60NKMU4; When connecting the SEZ and PEAD-series units, the total system wide capacity per 1 branch box should be 100% or below including the ducted units. (Only if connecting to branch box)
4 When not outside units 60: A branch box can connect to maximum 3 of the ducted units. When connecting with 3 of the ducted units per 1 branch box, other
indoor units cannot be connected. When outside units 60: A branch box can
connect to maximum 2 of the ducted units. When connecting with 1 and over 1 of
the ducted units, the total ability including of the ducted units is 100% and
below 100%. 5 When 1 or more PLA-A EA or PAA-AA units is connected, the
number of the maximum connectable indoor units is decreased as follows:
3 for PUMY-(H)P36, 4 for PUMY-HP42, and 6 for PUMY-(H)P48 and PUMY-P60 6 Only
PUMY-(H)P36/42/48 are connectable.
OCH811B
9
2-4. SYSTEM SPECIFICATIONS
(1) Outdoor Unit
Outdoor unit
Capacity
Model name
Cooling (kBtu/h) Heating (kBtu/h)
P36NKMU4 HP36NKMU2
36
41
42
HP42NKMU2
42 48
P48NKMU4 HP48NKMU2
48
50
54
P60NKMU4
60 66
Cooling/Heating capacity indicates the maximum value at operation under the following condition.
Cooling Heating
Indoor D.B. 80°F/W.B. 67°F: [D.B. 26.7°C/W.B. 19.4°C] Outdoor D.B. 95°F/W.B. 75°F: [D.B. 35°C/W.B. 23.9°C] Indoor D.B. 70°F/W.B. 60°F: [D.B. 21.1°C/W.B. 15.6°C] Outdoor D.B. 47°F/W.B. 43°F: [D.B. 8.3°C/W.B. 6.1°C]
(2) Method for identifying
Hyper-Heating INVERTER
Refrigerant R410A
PU M Y – H P 36 N K M U 4
Sub-number UL model
Frequency conversion controller
M-NET control Outdoor unit model type
MULTI-S
Power supply N: 1-phase 208/230 V, 60 Hz
Outdoor unit
Indicates equivalent to rated cooling capacity. (kBtu/h)
OCH811B
10
SPECIFICATIONS
Cooling
Service Ref.
Indoor type Capacity Rated1 Rated power consumption1
Current input (208/230V)
EER2
SEER2 Capacity Rated 47°F1 Capacity Max. 17°F2 Capacity Max. 5°F Rated power
consumption 47°F1
Current input (208/230V) COP 47°F1
HSPF2 /
Power supply Breaker Size/Maximum over current protection
Heating
Minimum circuit ampacity
Indoor unit connectable
Total capacity Model/Quantity *3
Sound pressure level (measured in anechoic room)
Refrigerant piping diameter
Liquid pipe Gas pipe
Btu/h W A
Btu/h/W –
Btu/h Btu/h Btu/h
W A W/W –
CITY MULTI Branch box
dB
PUMY-P36NKMU4
PUMY-P48NKMU4
Non-Ducted
Mix
Ducted
Non-Ducted
Mix
36,000
36,000
36,000
48,000
48,000
2,400
2,740
3,190
3,665
4,090
11.7/10.6
13.4/12.1
15.6/14.1
17.9/16.2
20.0/18.1
15.00
13.15
11.30
13.10
11.75
23.00
19.30
15.60
23.00
18.85
41,000
41,000
41,000
50,000
50,000
36,000
36,000
36,000
43,000
43,000
29,000
29,000
29,000
35,400
35,400
3,005
3,250
3,535
3,665
4,075
14.7/13.3
15.9/14.3
17.3/15.6
17.9/16.2
19.9/18.0
4.00
3.70
3.40
4.00
3.60
11.00/8.75
9.80/8.05
8.60/7.40
10.40/8.35
9.35/7.90
1-phase 208/230 V, 60 Hz
30 A/64 A (When power is supplied separately) 40 A/70 A (When power is supplied from the outdoor unit)
36 A (When power is supplied separately) 42 A (When power is supplied from the outdoor unit)
50 to 130% of outdoor unit capacity
04 – 36/11
04 – 54/12
06 – 36/4
06 – 36/8
49/53
51/54
Ducted 48,000 4,615 22.5/20.4 10.40 14.70 50,000 43,000 35,400 4,580 22.4/20.2
3.20 8.30/7.50
inch (mm) inch (mm)
3/8 (ø9.52) 5/8 (ø15.88)
Fan
Type × Quantity
Propeller fan × 2
Airflow rate
m³/min
110
L/s
1,834
cfm
3,885
Control, Driving mechanism
DC control
Motor output
kW
0.074 × 2
External static press.
0
Compressor
Type × Quantity
Scroll hermetic compressor x 1
Manufacture
Mitsubishi Electric Corporation
Starting method
Inverter
Motor output
kW
2.8
3.4
Case heater
kW
0
Lubricant
FV50S 78oz. (2.3L)
External finish
Galvanized Steel Sheet <Munsell 3Y 7.8/ 1.1>
External dimension H × W × D
mm
1,338 × 1,050 × 330 (+25)
inch
52-11/16 × 41-11/32 × 13 (+1)
Protection devices
High pressure protection Inverter circuit (COMP./FAN)
High pressure switch Overcurrent detection, Overheat detection (Heat sink thermistor)
Compressor protection
Compressor thermo, Overcurrent detection
Fan motor protection
Overheating/Voltage protection
Refrigerant
Type × original charge
R410A 10 lbs. 9 oz. (4.8kg)
Control
Linear Expansion Valve
Net weight
lb (kg)
271 (123)
Heat exchanger
Cross fin and tube
HIC circuit (HIC: Heat Inter-Changer)
HIC circuit
Defrosting method
Reversed refrigerant circuit
Guaranteed operation range
(Cooling)
D.B 23 to 115°F [ D.B.-5 to 46°C ] 45*6
(Heating)
W.B. -13 to 59°F [W.B. -25 to 15°C]
Remarks
Details on foundation work, duct work, insulation work, electrical wiring, power source switch, and
other items shall be referred to the Installation Manual.
Due to continuing improvement, above specifications may be subject to change without notice.
*1 Rating conditions Cooling Indoor : D.B. 80°F/W.B. 67 °F [D.B.26.7°C/W.B. 19.4°C]
*2 Conditions
Outdoor : D.B. 95°F [D.B. 35.0°C] Heating Indoor : D.B. 70°F [D.B. 21.1°C] Outdoor : D.B. 47°F/W.B. 43°F [D.B. 8.3°C/W.B. 6.1°C] Heating Indoor : D.B. 70°F [D.B. 21.1°C]
kcal/h = kW o 860 Conversion formula: Btu/h = kW o 3412
CFM = m3/min o 35.31
Outdoor : D.B. 17°F/W.B. 15°F [D.B. -8.3°C/W.B. -9.4°C]
*3 It cannot be connected mixed CITY MULTI indoor unit and branch box indoor unit.
*4 D.B. 5 to 115°F [D.B. -15 to 46°C], when an optional Air Outlet Guide is installed.
However, this condition does not apply to the indoor units listed in *5.
*5 50 to 115°F (10 to 46°C) D.B.: When connecting PKFY-P04/06/08/12NLMU, PFFY-P06/08/12NEMU, and PFFY-P06/08/12NRMU type indoor unit.
*6 When the temperature is below D.B. 50°F [D.B. 10°C] with branch box system, noise could potentially occur.
Note: Refer to the indoor unit’s service manual for the indoor units specifications.
OCH811B
11
Service Ref.
PUMY-HP36NKMU2
PUMY-HP42NKMU2
PUMY-HP48NKMU2
Indoor type Capacity Rated1 Rated power consumption1 Current input (208/230V)
Btu/h W A
Non-Ducted 36,000 2,400
11.7/10.6
Mix 36,000 2,740 13.4/12.1
Ducted 36,000 3,190 15.6/14.1
Non-Ducted 42,000 3,135
15.3/13.8
Mix 42,000 3,500 17.1/15.4
Ducted 42,000 3,965 19.4/17.5
Non-Ducted 48,000 3,665
17.9/16.2
Mix 48,000 4,090 20.0/18.1
Ducted 48,000 4,615 22.5/20.4
Cooling
EER2
Btu/h/W
15.00
13.15
11.30
13.40
12.00
10.60
13.10
11.75
10.40
Heating
SEER2 Capacity Rated 47°F1 Capacity Max. 17°F2 Capacity Max. 5°F Rated power consumption 47°F1 Current input (208/230V) COP 47°F1 HSPF2 /
Btu/h Btu/h Btu/h
W A W/W –
23.00
19.30
42,000
42,000
42,000
42,000
38,500
38,500
3,080
3,330
15.0/13.6 16.3/14.7
4.00
3.70
12.00/10.65 10.95/9.70
15.60 42,000 42,000 38,500 3,620 17.7/16.0
3.40 9.90/8.80
21.50
18.85
48,000 48,000
48,000 48,000
44,000 44,000
3,435
3,805
16.8/15.2 18.6/16.8
4.10
3.70
11.10/9.80 10.10/9.30
14.70 48,000 48,000 44,000 4,265 20.8/18.8
3.30 9.10/8.80
23.00
18.85
54,000 54,000
54,000 54,000
47,000 47,000
3,960
4,400
19.3/17.5 21.5/19.4
4.00
3.60
11.50/9.80 10.15/9.05
14.70 54,000 54,000 47,000 4,950 24.2/21.8
3.20 8.80/8.30
Power supply
1-phase 208/230 V, 60 Hz
Breaker Size/Maximum over current protection
40 A/80 A (When power is supplied separately) 45 A/86 A (When power is supplied from the outdoor unit)
Minimum circuit ampacity
45 A (When power is supplied separately) 51 A (When power is supplied from the outdoor unit)
Indoor unit connectable
Total capacity Model/Quantity *3
Sound pressure level (measured in anechoic room)
04 – 36/11 06 – 36/4
49/53
50 to 130% of outdoor unit capacity 04 – 54/12 06 – 36/5
50/54
04 – 54/12 06 – 36/8
51/54
Refrigerant
Liquid pipe
piping diameter Gas pipe
inch (mm) inch (mm)
3/8 (ø9.52) 5/8 (ø15.88)
Fan
Type × Quantity
Propeller fan × 2
Airflow rate
m³/min L/s
110 1,834
cfm
3,885
Control, Driving mechanism
DC control
Motor output
kW
0.074 × 2
Compressor
External static press. Type × Quantity
0 Scroll hermetic compressor × 1
Manufacture
Mitsubishi Electric Corporation
Starting method
Inverter
Motor output
kW
2.8
2.9
3.4
Case heater
kW
0
Lubricant
FV50S 78oz. (2.3L)
External finish
External dimension H × W × D
mm
inch
Galvanized Steel Sheet <Munsell 3Y 7.8/ 1.1> 1,338 × 1,050 × 330 (+25)
52-11/16 × 41-11/32 × 13 (+1)
Protection devices
High pressure protection Inverter circuit (COMP./FAN)
High pressure switch Overcurrent detection, Overheat detection (Heat sink thermistor)
Compressor protection
Compressor thermo, Overcurrent detection
Fan motor protection
Overheating/Voltage protection
Refrigerant Net weight
Type x original charge Control
lb (kg)
R410A 10 lbs. 9 oz. (4.8kg) Linear Expansion Valve 278 (126)
Heat exchanger HIC circuit (HIC: Heat Inter-Changer)
Cross fin and tube HIC circuit
Defrosting method Guaranteed operation range
(Cooling) (Heating)
Reversed refrigerant circuit D.B 23 to 115°F [D.B.-5 to 46°C] 45*6
W.B. -13 to 59°F [W.B. -25 to 15°C]
Remarks
Details on foundation work, duct work, insulation work, electrical wiring, power source switch, and other items shall be referred to the Installation Manual. Due to continuing improvement, above specifications may be subject to change without notice.
1 Rating conditions 2 Conditions
Cooling Indoor : D.B. 80°F/W.B. 67 °F [D.B.26.7°C/W.B. 19.4°C] Outdoor : D.B. 95°F [D.B. 35.0°C] Heating Indoor : D.B. 70°F [D.B. 21.1°C] Outdoor : D.B. 47°F/W.B. 43°F [D.B. 8.3°C/W.B. 6.1°C] Heating Indoor : D.B. 70°F [D.B. 21.1°C]
kcal/h = kW o 860 Conversion formula: Btu/h = kW o 3412
CFM = m3/min o 35.31
Outdoor : D.B. 17°F/W.B. 15°F [D.B. -8.3°C/W.B. -9.4°C]
*3 It cannot be connected mixed CITY MULTI indoor unit and branch box indoor unit.
*4 D.B. 5 to 115°F [D.B. -15 to 46°C], when an optional Air Outlet Guide is installed.
However, this condition does not apply to the indoor units listed in *5.
*5 50 to 115°F (10 to 46°C)D.B.: When connecting PKFY-P04/06/08/12NLMU, PFFY-P06/08/12NEMU, and PFFY-P06/08/12NRMU type indoor unit.
*6 When the temperature is below D.B. 50°F [D.B. 10°C] with branch box system, noise could potentially occur.
Note: Refer to the indoor unit’s service manual for the indoor units specifications.
OCH811B
12
Service Ref.
PUMY-P60NKMU4
Indoor type Capacity Rated1 Rated power consumption1
Btu/h W
Non-Ducted 60,000 4,515
Mix 60,000 5,065
Ducted 60,000 5,770
Cooling
Current input (208/230V)
A
21.9/19.8
24.6/22.3
28.0/25.4
EER2
Btu/h/W
13.30
11.85
10.40
SEER2
–
20.00
17.75
15.50
Capacity Rated 47°F1 Capacity Max. 17°F2
Btu/h Btu/h
66,000 65,000
66,000 65,000
66,000 65,000
Heating
Capacity Max. 5°F Rated power consumption 47°F*1
Btu/h W
46,500 4,720
46,500 5,175
46,500 5,690
Current input (208/230V)
A
22.9/20.7
25.2/22.8
27.7/25.0
COP 47°F*1
W/W
4.10
3.74
3.40
HSPF2 /
–
10.50/8.65
9.55/8.05
8.60/7.45
Power supply
1-phase 208/230 V, 60 Hz
Breaker Size/Maximum over current protection
40 A/80 A (When power is supplied separately) 50 A/90 A (When power is supplied from the outdoor unit)
Minimum circuit ampacity
45 A (When power is supplied separately) 55 A (When power is supplied from the outdoor unit)
Indoor unit connectable
Total capacity Model/Quantity*3
CITY MULTI
50 to 130% of outdoor unit capacity 04 – 72 /12
Branch box
06 – 36 / 8
Sound pressure level (measured in anechoic room)
58/59
Refrigerant piping diameter
Liquid pipe Gas pipe
inch (mm) inch (mm)
3/8 (ø9.52) 3/4 (ø19.05)
Fan
Type × Quantity
Propeller fan × 2
Airflow rate
m³/min
138
L/s
2,300
cfm
4,879
Control, Driving mechanism
DC control
Motor output
kW
0.200 × 2
External static press.
0
Compressor
Type × Quantity
Scroll hermetic compressor x 1
Manufacture
Mitsubishi Electric Corporation
Starting method
Inverter
Motor output
kW
3.9
Case heater
kW
0
Lubricant
FVC68D 78oz. (2.3L)
External finish
Galvanized Steel Sheet <Munsell 3Y 7.8/ 1.1>
External dimension H × W × D
mm
1,338 × 1,050 × 330 (+25)
inch
52-11/16 × 41-11/32 × 13 (+1)
Protection devices
High pressure protection Inverter circuit (COMP./FAN)
High pressure switch Overcurrent detection, Overheat detection(Heat sink thermistor)
Compressor protection
Compressor thermo, Overcurrent detection
Fan motor protection
Overheating/Voltage protection
Refrigerant
Type x original charge
R410A 11 lbs. 4 oz. (5.1kg)
Control
Linear Expansion Valve
Net weight
lb (kg)
300 (136)
Heat exchanger
Cross fin and tube
HIC circuit (HIC: Heat Inter-Changer)
HIC circuit
Defrosting method Guaranteed operation range
(Cooling)
Reversed refrigerant circuit D.B 23 to 115°F [D.B.-5 to 46°C] 45*6
(Heating)
W.B. -13 to 59°F [W.B. -25 to 15°C]
Remarks
Details on foundation work, duct work, insulation work, electrical wiring, power source switch, and
other items shall be referred to the Installation Manual.
Due to continuing improvement, above specifications may be subject to change without notice.
1 Rating conditions 2 Conditions
Cooling Indoor : D.B. 80°F/W.B. 67 °F [D.B.26.7°C/W.B. 19.4°C] Outdoor : D.B. 95°F [D.B. 35.0°C] Heating Indoor : D.B. 70°F [D.B. 21.1°C] Outdoor : D.B. 47°F/W.B. 43°F [D.B. 8.3°C/W.B. 6.1°C] Heating Indoor : D.B. 70°F [D.B. 21.1°C]
kcal/h = kW o 860 Conversion formula: Btu/h = kW o 3412
CFM = m3/min o 35.31
Outdoor : D.B. 17°F/W.B. 15°F [D.B. -8.3°C/W.B. -9.4°C]
*3 It cannot be connected mixed CITY MULTI indoor unit and branch box indoor unit.
*4 D.B. 5 to 115°F [D.B. -15 to 46°C], when an optional Air Outlet Guide is installed.
However, this condition does not apply to the indoor units listed in *5.
*5 50 to 115°F (10 to 46°C) D.B.: When connecting PKFY-P04/06/08/12NLMU, PFFY-P06/08/12NEMU, and PFFY-P06/08/12NRMU type indoor unit.
*6 When the temperature is below D.B. 50°F [D.B. 10°C] with branch box system, noise could potentially occur.
Note: Refer to the indoor unit’s service manual for the indoor units specifications.
OCH811B
13
DATA
4-1. SELECTION OF COOLING/HEATING UNITS
How to determine the capacity when less than or equal 100% indoor model size
units are connected in total:
The purpose of this flow chart is to select the indoor and outdoor units. For
other purposes, this flow chart is intended only for reference.
Determine the load (L) and the Indoor/Outdoor Temperature
Temporarily select the Indoor/Outdoor Units
Reselect the indoor units Reselect the outdoor units
Reselect the indoor units Reselect the outdoor units
Indoor Unit
n
Total Indoor Units Capacity (CTi) = (Individual Rated Indoor Unit Capacity CTik ×
k=1
Individual Indoor Temperature Correction Coef. k) (Figure 1, 4)
n: Total Number of Indoor Units k: Indoor Unit Number
Outdoor Unit *1 Outdoor Unit Capacity (CTo) = Rated Outdoor Unit Capacity ×
Outdoor Temperature Correction Coef. (Figure 2, 5) × Piping Length
Correction Coef. (Figure 3, 6) × Defrost Correction Coef. (in heating
operation, Table 1)
(If indoor to outdoor connectable capacity ratio is less than 100%, the capacity correction is set as 100% )
Capacity Determination
CTo CTi
No
Yes Maximum Capacity(CTmax) = CTo
No L CTo
Yes
Yes
Want to change to smaller
indoor units?
No
CTik × k
Individual Indoor Unit Capacity: CT’ik= CTmax ×
n
(CTim
×
m)
m=1
Maximum Capacity(CTmax) = CTi
L CTi
No
Yes
Need to select smaller
Yes
outdoor unit?
No
No Does it fulfill the load of
each room?
Yes
Input Calculation
No
Does it fulfill the load of
each room?
Yes Completed Selecting Units
Completed Selecting Units
ck: Outdoor unit power input coefficient of k indoor unit room temp. (Refer to 4-2.) Mk: Number part of the k indoor unit model (e.g. P80 80)
Average Indoor temp. power input Coef. (cave)
cave
=
n
{ck
×
(Mk/
n
Mk)}
k=1
k=1
Average Indoor temp. power input Coef. (cave)
cave
=
n
{ck
×
(Mk/
n
Mk)}
k=1
k=1
Outdoor Unit Input = Rated Outdoor Unit Input × cave
Outdoor Unit Input = Rated Outdoor Unit Input × cave
× (CTi )
(x) is the approximate correction function when less than or equal 100% model
size units are input as connected.
OCH811B
14
How to determine the capacity when greater than 100% indoor model size units
are connected in total:
The purpose of this flow chart is to select the indoor and outdoor units. For
other purposes, this flow chart is intended only for reference.
Determine the load (L) and the Indoor/Outdoor Temperature
Temporarily select the indoor/outdoor units
Reselect the indoor units
Reselect the indoor units
Reselect the outdoor units
Reselect the outdoor units
Indoor Unit
n
Total Indoor Units Capacity (CTi) = (Individual Rated Indoor Unit Capacity CTik ×
k=1
Individual Indoor Temperature Correction Coef. k) (Figure 1, 4)
n: Total Number of Indoor Units k: Indoor Unit Number
Outdoor Unit *1 Outdoor Unit Capacity (CTo) = Rated Outdoor Unit Capacity ×
(CT i)
× Outdoor Temperature Correction Coef. (Figure 2, 5) × Piping Length
Correction Coef. (Figure 3, 6) × Defrost Correction Coef. (in heating, Table
(x) is the approximate correction function when greater than 100% model size
units are connected.
(x) refers to STANDARD CAPACITY DIAGRAM.
No CTo CTi
Yes Maximum Capacity(CTmax) = CTo
Maximum Capacity(CTmax) = CTi No
L CTi
Input Calculation
No L CTo
Yes
Yes
Want to change to smaller
indoor units?
No
CTik × k
Individual Indoor Unit Capacity: CT’ik= CTmax ×
n
(CTim
×
m)
m=1
Yes
Need to select smaller
Yes
outdoor unit?
No
No Does it fulfill the load of
each room?
Yes Completed Selecting Units
No
Does it fulfill the load of
each room?
Yes Completed Selecting Units
Rated Outdoor Unit Capacity < Total Indoor Units Capacity
ck: Outdoor unit power input coefficient of k indoor unit room temp. (Refer to 4-2.) Mk: Number part of the k indoor unit model (e.g. P80 80)
Yes
Outdoor Unit Input
No
= Rated Outdoor Unit Input ×
Outdoor Temperature
Correction Coef.
× (CTi )
(x) is the approximate correction function when less than or equal 100% model size units are input as connected.
Average Indoor temp. power input Coef. (cave)
cave
=
n
{ck
×
(Mk/
n
Mk)}
k=1
k=1
Average Indoor temp. power input Coef. (cave)
n
n
= {ck × (Mk/ Mk)}
k=1
k=1
Outdoor Unit Input =Rated Outdoor Unit Input × cave
× (CTi )
Outdoor Unit Input = Rated Outdoor Unit Input × cave
× (CTi )
(x) is the approximate correction function when greater than 100% model size units are input as connected.
OCH811B
15
98.6ºF (37.0ºC) 30.3 kBtu/h
80.6ºF (27.0ºC) 68.0ºF (20.0ºC)
13.6 kBtu/h
75.2ºF (24.0ºC) 66.2ºF (19.0ºC)
16.7 kBtu/h
250 ft
(kBtu/h)
Model Number for indoor unit
Model 04
Model 05
Model 06
Model 08
Model 12
Model 15
Model 18
Model 24
Model 27
Model 30
Model 36
Model 48
Model 54
Model 72
Model Capacity
4.0
5.0
6.0
8.0
12.0
15.0
18.0
24.0
27.0
30.0
36.0
48.0
54.0
72.0
<M,S,P series>
Model name
Capacity class 06 09 12 15 18 24 30 36
SVZ
–
– 12.0 – 18.0 24.0 30.0 36.0
SLZ-KF
–
8.4 11.1 15.0 –
–
–
–
SEZ-KD
–
8.1 11.5 14.1 17.2 –
–
–
MFZ-KJ
–
9.0 12.0 15.0 17.0 –
–
–
MLZ-KP
–
9.0 12.0 – 17.2 –
–
–
MLZ-KY 6.0
–
–
–
–
–
–
–
MSZ-FH 6.0 9.0 12.0 15.0 17.2 –
–
–
MSZ-FS 6.0 9.0 12.0 15.0 17.2 –
–
–
MSZ-GL 6.0 9.0 12.0 14.0 17.2 22.5 –
–
MSZ-GS 6.0 9.0 12.0 14.0 18.0 22.4 –
–
MSZ-EF
–
9.0 12.0 15.0 18.0 –
–
–
PEAD
–
9.0 12.0 15.0 18.0 24.0 30.0 36.0
PLA
–
– 12.0 – 18.0 24.0 30.0 36.0
PAA-A
–
–
–
– 18.0 24.0 30.0 36.0
1. Cooling Calculation
(1) Temporary Selection of Indoor Units
1.2
Room1
PEFY-P15
15.0 kBtu/h (Rated)
1.0
Ratio of cooling capacity
Room2
0.8
PEFY-P18
18.0 kBtu/h (Rated)
0.6
(2) Total Indoor Units Capacity P15+ P18 = P33
(3) Selection of Outdoor Unit The P36 outdoor unit is selected as total indoor units capacity is P33
PUMY-P36NKMU4
36.0 kBtu/h
(4) Total Indoor Units Capacity Correction Calculation Room1 Indoor Design Wet Bulb Temperature Correction (68.0ºF) Room2 Indoor Design Wet Bulb Temperature Correction (66.2ºF)
1.02 (Refer to Figure 1) 0.95 (Refer to Figure 1)
Total Indoor Units Capacity (CTi)
CTi = (Indoor Unit Rating × Indoor Design Temperature Correction) = 15.0 ×
1.02 + 18.0 × 0.95 = 32.4 kBtu/h
(5) Outdoor Unit Correction Calculation
Outdoor Design Dry Bulb Temperature Correction (98.6ºF)
0.98 (Refer to Figure 2)
Piping Length Correction (250 ft)
0.93 (Refer to Figure 3)
Total Outdoor Unit Capacity (CTo) CTo = Outdoor Rating × G(CTi)1 × Outdoor
Design Temperature Correction
× Piping Length Correction = 36.0 × 0.98 × 0.93 = 32.8 kBtu/h
1 G(CTi) is used only when greater than 100% indoor model size are connected in total, refer to STANDARD CAPACITY DIAGRAM.
0.459 15
60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2 [°FW.B.] 16 17 18 19 20 21 22 23 24 [°CW.B.] Indoor Temperature
Figure 1 Indoor unit temperature correction
To be used to correct indoor unit only
1.4
Indoor
1.3
Temperature
Ratio of cooling capacity
1.2
1.1
1.0
0.9
19.4°C (67.0°F) W.B
0.8
0.7
0.6
0.5 5
14
23
32
41
50
59
68
77
86
95 104 113 [°F D.B.]
-15 -10 -5
0
5
10
15
20
25
30
35
40
45 [°C D.B.]
Outdoor Temperature
Figure 2 Outdoor unit temperature correction
To be used to correct outdoor unit only
Capacity ratio
1.00 0.95 0.90 0.85 0.80 0.75 0.70 0.65 0.60 0.55 0.50
0
Total capacity of indoor unit 18 [kBtu/h] 27 [kBtu/h] 36 [kBtu/h] 46.8 [kBtu/h] 50 100 150 200 250 300 350 400 450 500 550 600 Piping equivalent length (ft)
Figure 3 Correction of refrigerant piping length
(6) Determination of Maximum System Capacity
Comparison of Capacity between Total Indoor Units Capacity (CTi) and Total Outdoor Unit Capacity (CTo)
CTi = 32.4 < CTo = 32.8, thus, select CTi.
CTx = CTi = 32.4 kBtu/h
OCH811B
16
(7) Comparison with Essential Load Against the essential load 30.3 kBtu/h, the maximum system capacity is 32.4 kBtu/h: Proper outdoor units have been selected.
(8) Calculation of Maximum Indoor Unit Capacity of Each Room
CTx = CTi, thus, calculate by the calculation below
Room1
Indoor Unit Rating × Indoor Design Temperature Correction
= 15.0 × 1.02
= 15.3 kBtu/h
OK: fulfills the load 13.6 kBtu/h
Room2
Indoor Unit Rating × Indoor Design Temperature Correction
= 18.0 × 0.95
= 17.1 kBtu/h
OK: fulfills the load 16.7 kBtu/h
Go on to the heating trial calculation since the selected units fulfill the cooling loads of Room 1, 2.
35.6ºF (2.0ºC) 34.0 kBtu/h
69.8ºF (21.0ºC) 16.3 kBtu/h
73.4ºF (23.0ºC) 17.7 kBtu/h
328 ft
Capacity of indoor unit
(kBtu/h)
<P·FY series>
Model Number for indoor unit
Model Capacity
Model 04 Model 05 Model 06 Model 08 Model 12 Model 15 Model 18 Model 24 Model 27 Model 30 Model 36 Model 48 Model 54
4.5
5.6
6.7
9.0
13.5
17.0
20.0
27.0
30.0
34.0
40.0
54.0
60.0
<M,S,P series>
Model name
SVZ SLZ-KF SEZ-KD MFZ-KJ MLZ-KP MLZ-KY MSZ-FH MSZ-FS MSZ-GL MSZ-GS MSZ-EF PEAD
PLA PAA-A
Capacity class
06 09 12 15 18 24 30 36
–
– 12.0 – 18.0 27.0 34.0 40.0
– 10.2 13.7 17.1 –
–
–
–
– 10.9 13.6 18.0 17.2 –
–
–
– 10.9 13.0 18.0 21.0 –
–
–
– 10.9 13.0 – 21.0 –
–
–
7.2
–
–
–
–
–
–
–
8.7 10.9 13.6 18.0 20.3 –
–
–
8.7 10.9 13.6 18.0 20.3 –
–
–
7.2 10.9 14.4 18.0 21.6 27.6 –
–
7.2 10.9 14.4 18.0 21.6 27.6 –
–
– 10.9 13.0 18.0 21.0 –
–
–
– 10.9 13.5 15.7 18.0 26.0 34.0 40.0
–
– 13.5 – 18.0 26.0 34.0 40.0
–
–
–
– 19.0 26.0 32.0 38.0
OCH811B
17
2. Heating Calculation
(1) Temporary Selection of Indoor Units
Room1
PEFY-P15
17.0 kBtu/h (Rated)
Room2
PEFY-P18
20.0 kBtu/h (Rated)
(2) Total Indoor Units Capacity
P15 + P18 = P33
(3) Selection of Outdoor Unit
The P36 outdoor unit is selected as total indoor units capacity is P33
PUMY-P36NKMU4
41.0 kBtu/h
(4) Total Indoor Units Capacity Correction Calculation
Room1
Indoor Design Dry Bulb Temperature Correction (69.8ºF)
Room2
Indoor Design Dry Bulb Temperature Correction (73.4ºF)
1.00 (Refer to Figure 4) 0.92 (Refer to Figure 4)
Total Indoor Units Capacity (CTi)
CTi = (Indoor Unit Rating × Indoor Design Temperature Correction) = 17.0 ×
1.00 + 20.0 × 0.92 = 35.4 kBtu/h
Ratio of heating capacity
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6 59 60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2 77 78.8 80.6 [°F D.B.] 15 16
17 18 19 20 21 22 23 24 25 26 27 [°C D.B.] Indoor Temperature
Figure 4 Indoor unit temperature correction
To be used to correct indoor unit only
Ratio of heating capacity
1.4 1.3 1.2
1.1 1.0 0.9
0.8
0.7
0.6
0.5
0.4
-13
-4
5
14
23
32
-25
-20
-15
-10
-5
0
Outdoor Temperature
Indoor Temperature
21.1°C (70.0°F) D.B.
41
50
59 [°F W.B.]
5
10
15 [°C W.B.]
Figure 5 Outdoor unit temperature correction
To be used to correct outdoor unit only
(5) Outdoor Unit Correction Calculation Outdoor Design Wet Bulb Temperature Correction (35.6ºF) Piping Length Correction (328 ft) Defrost Correction
1.00
1.0 (Refer to Figure 5) 0.94 (Refer to Figure 6) 0.95 0.89 (Refer to Table 1)
0.90
Total capacity of indoor unit
Capacity ratio
Total Outdoor Unit Capacity (CTo)
0.85
CTo = Outdoor Unit Rating × G(CTi)*1× Outdoor Design Temperature Correction 0.80 × Piping Length Correction × Defrost Correction
= 41.0 × 1.0 × 0.94 × 0.89
0.75
= 34.3 kBtu/h 0.70
*1 G(CTi) is used only when greater than 100% indoor model size are connected in total,
0
50 100 150 200 250 300 350 400 450 500 550 600
refer to STANDARD CAPACITY DIAGRAM.
Piping equivalent length (ft)
Table 1 Table of correction factor at frost and defrost
Figure 6 Correction of refrigerant piping length
Outdoor Intake temperature <W.B.°F (°C)> 43(6) 37(4) 36(2) 32(0) 28(-2) 25(-4) 21(-6) 18(-8) 14(-10) 5(-15) -4(-20) -13(-25)
Correction factor
1.00 0.98 0.89 0.88 0.89 0.90 0.95 0.95 0.95 0.95 0.95 0.95
(6) Determination of Maximum System Capacity Comparison of Capacity between Total Indoor Units Capacity (CTi) and Total Outdoor Unit Capacity (CTo)
CTi = 35.4 > CTo = 34.3, thus, select CTo.
CTx = CTo = 34.3 kBtu/h
(7) Comparison with Essential Load
Against the essential load 34.0 kBtu/h, the maximum system capacity is 34.3 kBtu/h: Proper outdoor units have been selected.
(8) Calculation of Maximum Indoor Unit Capacity of Each Room
CTx = CTo, thus, calculate by the calculation below
Room1
Maximum Capacity × Room1 Capacity after the Temperature Correction/(Room1,2 Total Capacity after the Temperature Correction
= 34.3 × (17.0 × 1.00) / (17.0 × 1.00 + 20.0 × 0.92)
= 16.5 kBtu/h
OK: fulfills the load 16.3 kBtu/h
Room2
Maximum Capacity × Room1 Capacity after the Temperature Correction/(Room1,2 Total Capacity after the Temperature Correction
= 34.3 × (20.0 × 0.92) / (17.0 × 1.00 + 20.0 × 0.92)
= 17.8 kBtu/h
OK: fulfills the load 17.7 kBtu/h
Completed selecting units since the selected units fulfill the heating loads of Room 1, 2.
OCH811B
18
3. Power input of outdoor unit Outdoor unit: PUMY-P36NKMU4 Indoor unit 1: PEFY-P15 Indoor unit 2: PEFY-P18
2.40 kW
(2) Calculation of the average indoor temperature power input coefficient
Coefficient of the outdoor unit for indoor unit 1 (Outdoor temp. 98.6°F
[37.0°C] D.B., Indoor temp. 68.0°F [20.0°C] W.B.) 1.04 (Refer to “4-2.
CORRECTION BY TEMPERATURE”.)
Coefficient of the outdoor unit for indoor unit 2 (Outdoor temp. 98.6°F
[37.0°C] D.B., Indoor temp. 64.4°F [18.0°C] W.B.) 0.85 (Refer to “4-2.
CORRECTION BY TEMPERATURE”.)
Average
indoor
temp.
power
input
coefficient
(cave)
=
n
{ck
×
(Mk/
n
Mk)}
k=1
k=1
n: Total number of the indoor units k: Number of the indoor unit c k : Outdoor unit power input coefficient of k indoor unit room temp. Mk: Number part of the k indoor unit model (e.g. P80 80)
Correction Coefficient of Indoor temperature = 1.04 × 15/(15 + 18) + 0.85 × 18/(15 + 18) = 0.94
(3) Coefficient of the partial load (CTi)
Total Indoor units capacity 15 + 18 = 33, thus, (CTi) = 0.9 (Refer to the
tables in “4-4.STANDARD CAPACITY DIAGRAM”.)
(4) Outdoor power input (PIo)
Maximum System Capacity (CTx) = Total Outdoor unit Capacity (CTo), so use the
following formula PIo = Outdoor unit Cooling Rated Power Input × Correction
Coefficient of Indoor temperature × (CTi)
= 2.40 × 0.94 × 0.9 = 2.03 kW
(1) Rated power input of outdoor unit
3.01 kW
(2) Calculation of the average indoor temperature power input coefficient
Coefficient of the outdoor unit for indoor unit 1 (Outdoor temp. 26.6°F [-3°C]
W.B., Indoor temp. 70°F [21.1°C] D.B.) 1.16 (Refer to “4-2. CORRECTION BY
TEMPERATURE”.)
Coefficient of the outdoor unit for indoor unit 2 (Outdoor temp. 26.6°F [-3°C]
W.B., Indoor temp. 78.8°F [26°C] D.B.) 1.09 (Refer to “4-2. CORRECTION BY
TEMPERATURE”.)
n
n
Average indoor temp. power input coefficient (cave) = {ck × (Mk/ Mk)}
k=1
k=1
n: Total number of the indoor units k: Number of the indoor unit c k : Outdoor unit power input coefficient of k indoor unit room temp. Mk : Number part of the k indoor unit model (e.g. P80 80)
Correction Coefficient of Indoor temperature = 1.16 × 15/(15 + 18) + 1.09 × 18/(15 + 18) = 1.12
(3) Coefficient of the partial load (CTi)
Total indoor units capacity 15 + 18 = 33, thus, (CTi) = 0.9 (Refer to the
tables in “4-4. STANDARD CAPACITY DIAGRAM”.)
(4) Outdoor power input (PIo)
Maximum System Capacity (CTx) = Total Indoor unit Capacity (CTi), so use the
following formula PIo = Outdoor unit Heating Rated Power Input × Correction
Coefficient of Indoor temperature × (CTi)
= 3.01 × 1.12 × 0.9 = 3.03 kW
OCH811B
19
4-2. CORRECTION BY TEMPERATURE
CITY MULTI could have varied capacity at different designing temperature.
Using the nominal cooling/heating capacity value and the ratio below, the
capacity can be observed at various temperature.
Ratio of cooling capacity
1.2
1.0
0.8
0.6
0.459 15
60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2 [°FW.B.] 16 17 18 19 20 21 22 23 24 [°CW.B.] Indoor Temperature
Figure 8 Outdoor unit temperature correction To be used to correct outdoor unit capacity only
Ratio of cooling capacity
1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 5
-15
1.2
1.0
Indoor Temperature 67.0°F (19.4°C) W.B.
14
23
32
41
50
59
68
77
-10
-5
0
5
10
15
20
25
Outdoor Temperature
68.0°F (20.0°C) W.B. 75.2°F (24.0°C) W.B. 72.0°F (22.0°C) W.B.
86
95
104
113 [°F D.B.]
30
35
40
45 [°C D.B.]
Indoor Temperature
Ratio of power input
0.8
0.6
67.0°F (19.4°C) W.B.
64.0°F (18.0°C) W.B.
0.4
61.0°F (16.0°C) W.B.
0.2
0.0 5
14
23
32
41
50
59
68
77
86
95
104
113 115 [°F D.B.]
-15
-10
-5
0
5
10
15
20
25
30
35
40
45 46 [°C D.B.]
Outdoor Temperature
OCH811B
20
PUMY-P48NKMU4
Figure 9 Indoor unit temperature correction To be used to correct indoor unit capacity only
PUMY-P60NKMU4
Ratio of heating capacity
1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6
59 60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2 77 78.8 80.6 [°F D.B.] 15 16 17
18 19 20 21 22 23 24 25 26 27 [°C D.B.] Indoor Temperature
Figure 10 Outdoor unit temperature correction To be used to correct outdoor
unit capacity only
Ratio of heating capacity 1*
Indoor Temperature
1.4
1.3
1.2
1.1
70.0°F (21.1°C) D.B.
1.0
0.9
0.8 0.7
0.6
0.5
0.4
-13
-4
5
14
23
32
41
50
59 [°F W.B.]
-25
-20
-15
-10
-5
0
5
10
15 [°C W.B.]
Outdoor Temperature
*1 Ratio of heating capacity vary according to connected indoor unit combinations, this chart shows the
minimum ratio of heating capacity.
Indoor Temperature
1.4
1.2 1.0
0.8 70.0°F (21.1°C) D.B.
0.6
61.0°F (16.0°C) D.B.
79.0°F (26.0°C) D.B. 0.4
0.2
0.0
-13
-4
5
14
23
32
41
50
59 [°F W.B.]
-25
-20
-15
-10
-5
0
5
10
15 [°C W.B.]
Outdoor Temperature
Ratio of power input
OCH811B
21
PUMY-HP42NKMU2
Figure 11 Indoor unit temperature correction To be used to correct indoor unit capacity only
PUMY-HP48NKMU2
Ratio of heating capacity
1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6
59 60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2 77 78.8 80.6 [°F D.B.] 15 16 17
18 19 20 21 22 23 24 25 26 27 [°C D.B.] Indoor Temperature
Figure 12 Outdoor unit temperature correction To be used to correct outdoor unit capacity only
Ratio of heating capacity
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
-13
-4
5
14
23
32
-25
-20
-15
-10
-5
0
Outdoor Temperature
1.8 1.6
Indoor Temperature
41
50
59 [°F W.B.]
5
10
15 [°C W.B.]
Indoor Temperature
Ratio of power input
1.4
1.2 1.0
0.8
70.0°F (21.1°C) D.B.
0.6
61.0°F (16.0°C) D.B.
79.0°F (26.0°C) D.B.
0.4
-13
-4
5
14
23
32
41
50
59 [°F W.B.]
-25
-20
-15
-10
-5
0
5
10
15 [°C W.B.]
Outdoor Temperature
OCH811B
22
4-3. STANDARD OPERATION DATA (REFERENCE DATA)
Operation
PUMY-P36NKMU4
PUMY-P48NKMU4
PUMY-P60NKMU4
Operating Ambient Indoor conditions temperature
Outdoor
DB/WB
80°F/67°F [26.7°C / 19.4°C]
70°F/60°F
80°F/67°F
70°F/60°F
80°F/67°F
70°F/60°F
[21.1°C/15.6°C] [26.7°C/19.4°C] [21.1°C/15.6°C] [26.7°C/19.4°C] [21.1°C/15.6°C]
95°F/75°F
47°F / 43°F
[35.0°C/23.9°C] [8.3°C/6.1°C]
95°F/ 75°F [35.0°C / 23.9°C]
47°F/43°F
95°F/75°F
47°F/43°F
[8.3°C/6.1°C] [35.0°C/23.9°C] [8.3°C/6.1°C]
Indoor unit No. of connected units Unit
3
4
4
No. of units in operation
3
4
4
Piping
Model Main pipe
12 × 3
9.84 (3)
12 × 4 9.84 (3)
15 × 4 9.84 (3)
Branch pipe
Ft (m)
14.76 (4.5)
14.76 (4.5)
14.76 (4.5)
Total pipe length
54.13 (16.5)
68.90 (21)
68.90 (21)
Fan speed
Hi
Hi
Hi
Amount of refrigerant
LBS. OZ. (kg)
17 LBS. (7.7)
17 LBS. 3 OZ. (7.8)
19 LBS. 6 OZ. (8.8)
Outdoor Electric current
unit
Voltage
A
10.2
13.3
V
230
15.6
17.1
230
19.3
20.4
230
Compressor frequency
Hz
47
66
64
81
53
64
LEV
Indoor unit
opening
Pulse
268
438
247
313
386
498
Pressure High pressure/Low pressure
PSIG [MPaG]
370/159 [2.55/1.10]
306/104 [2.11/0.72]
415/159 [2.86/1.09]
315/97 [2.17/0.67]
397/144 [2.75/1.02]
330/98 [2.28/0.68]
Temp. of Outdoor
each
unit
section
Discharge Heat exchanger outlet Accumulator inlet Compressor inlet
°F[°C]
139.1 [59.5] 101.3 [38.5] 56.7 [13.7] 62.8 [17.1]
118.9 [48.3] 34.3 [1.3] 33.4 [0.8] 33.6 [0.9]
149.5 [65.3] 102.2 [39.0] 57.6 [14.2] 60.4 [15.8]
135.9 [57.7] 32.2 [0.1] 31.3 [-0.4] 32.7 [0.4]
143.2 [61.8] 102.9 [39.4] 52.3 [11.3] 53.8 [12.1]
121.1 [49.5] 32.9 [0.5] 32.3 [0.1] 31.6 [-0.2]
Indoor unit Lev inlet
73.8 [23.2]
81.4 [27.4]
68.4 [20.2]
75.2 [24.0]
85.3 [29.6]
84.6 [29.2]
Heat exchanger inlet
68.2 [20.1]
71.4 [21.9]
67.9 [19.9]
127.8 [53.2]
84.2 [29.0]
113.9 [45.5]
Operation
PUMY-HP36NKMU2
PUMY-HP42NKMU2
PUMY-HP48NKMU2
Operating Ambient Indoor conditions temperature
Outdoor
DB/WB
80°F/67°F
70°F/60°F
80°F/67°F
70°F/60°F
80°F/67°F
70°F/60°F
[26.7°C/19.4°C] [21.1°C/15.6°C] [26.7°C/19.4°C] [21.1°C/15.6°C] [26.7°C/19.4°C] [21.1°C/15.6°C]
95°F/75°F
47°F / 43°F
95°F/ 75°F
47°F/43°F
95°F/ 75°F
47°F/43°F
[35.0°C/23.9°C] [8.3°C/6.1°C] [35.0°C/23.9°C] [8.3°C/6.1°C] [35.0°C/23.9°C] [8.3°C/6.1°C]
Indoor unit No. of connected units
3
3
4
No. of units in operation Unit
3
3
4
Piping
Model Main pipe
12 × 3
9.84 (3)
12 × 2 + 18 × 1 9.84 (3)
12 × 4 9.84 (3)
Branch pipe
Ft (m)
14.76 (4.5)
14.76 (4.5)
14.76 (4.5)
Total pipe length
54.13 (16.5)
68.90 (21)
68.90 (21)
Fan speed
Hi
Hi
Hi
Amount of refrigerant
LBS. OZ. (kg)
17 LBS. (7.7)
17 LBS. (7.7)
17 LBS. 3 OZ. (7.8)
Outdoor Electric current
unit
Voltage
A
10.2
13.3
V
230
13.4
14.8
230
15.6
17.1
230
Compressor frequency
Hz
47
66
58
70
64
81
LEV
Indoor unit
opening
Pulse
268
438
299/414
348/520
247
313
Pressure High pressure/Low pressure
PSIG [MPaG]
370/159 [2.55/1.10]
306/104 [2.11/0.72]
419/155 [2.89/1.17]
347/115 [2.39/0.79]
415/159 [2.86/1.09]
316/96 [2.18/0.66]
Temp. of each section
Outdoor unit
Indoor unit
Discharge Heat exchanger outlet Accumulator inlet Compressor inlet Lev inlet
°F[°C]
139.1 [59.5] 101.3 [38.5] 56.7 [13.7] 62.8 [17.1] 73.8 [23.2]
118.9 [48.3] 34.3 [1.3] 33.4 [0.8] 33.6 [0.9] 81.4 [27.4]
142.9 [61.6] 100.9 [38.3] 55.4 [13.0] 54.5 [12.5] 73.8 [23.2]
131.7 [55.4] 32.9 [0.5] 31.8 [-0.1] 31.1 [-0.5] 79.0 [26.1]
149.5 [65.3] 102.2 [39.0] 57.6 [14.2] 60.4 [15.8] 68.4 [20.2]
128.1 [53.4] 32.4 [0.2] 32.0 [0.0] 32.7 [0.4] 68.7 [20.4]
Heat exchanger inlet
68.2 [20.1]
71.4 [21.9]
56.5 [13.6]
123.8 [51.0]
67.9 [19.9]
122.0 [50.0]
OCH811B
23
4-4. STANDARD CAPACITY DIAGRAM
Before calculating the sum of total capacity of indoor units, please convert the value into the kBtu/h model capacity following the formula on “4-1. Method for obtaining system cooling and heating capacity”.
4-4-1. PUMY-P36NKMU4
PUMY-HP36NKMU2
G(x)
Ratio of capacity
Ratio of power input
1.0
0.8
0.6
0.4
0.2 0.0
0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
10
20
30
40
50
Total capacity of indoor units (kBtu/h)
10
20
30
40
Total capacity of indoor units (kBtu/h)
50
208, 230 V
10
20
30
40
50
Total capacity of indoor units (kBtu/h)
Ratio of current
OCH811B
24
4-4-2. PUMY-P36NKMU4
PUMY-HP36NKMU2
Ratio of capacity
Ratio of power input
1.0
0.8
0.6
0.4
0.2 0.0
0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
G(x)
10
20
30
40
50
Total capacity of indoor units (kBtu/h)
10
20
30
40
Total capacity of indoor units (kBtu/h)
50
208, 230 V
10
20
30
40
50
Total capacity of indoor units (kBtu/h)
Ratio of current
OCH811B
25
4-4-3. PUMY-HP42NKMU2
Ratio of capacity
Ratio of power input
1.2
1.0
0.8
0.6
0.4
0.2 0.0
0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
G(x)
10
20
30
40
50
60
Total capacity of indoor units (kBtu/h)
10
20
30
40
50
60
Total capacity of indoor units (kBtu/h)
208, 230 V
10
20
30
40
50
60
Total capacity of indoor units (kBtu/h)
Ratio of current
OCH811B
26
4-4-4. PUMY-HP42NKMU2
Ratio of capacity
Ratio of power input
1.2
1.0 0.8 0.6 0.4 0.2 0.0
0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.00.0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0
0.0
G(x)
10
20
30
40
50
60
Total capacity of indoor units (kBtu/h)
7.5
15.0
22.5
30.0
37.5
45.0
52.5
60.0
Total capacity of indoor units (kBtu/h)
7.5
15.0
22.5
30.0
37.5
45.0
52.5
60.0
Total capacity of indoor units (kBtu/h)
208, 230 V
Ratio of current
OCH811B
27
4-4-5. PUMY-P48NKMU4
PUMY-HP48NKMU2
Ratio of capacity
Ratio of power input
1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
G(x)
10
20
30
40
50
60
70
Total capacity of indoor units (kBtu/h)
10
20
30
40
50
60
70
Total capacity of indoor units (kBtu/h)
10
20
30
40
50
60
70
Total capacity of indoor units (kBtu/h)
208, 230 V
Ratio of current
OCH811B
28
4-4-6. PUMY-P48NKMU4
PUMY-HP48NKMU2
Ratio of capacity
Ratio of power input
1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0
G(x)
10
20
30
40
50
60
70
Total capacity of indoor units (kBtu/h)
10
20
30
40
50
60
70
Total capacity of indoor units (kBtu/h)
208, 230 V
10
20
30
40
50
60
70
Total capacity of indoor units (kBtu/h)
Ratio of current
OCH811B
29
4-4-7. PUMY-P60NKMU4
Ratio of capacity
Ratio of power input
1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
G(x)
10
20
30
40
50
60
70
80
Total capacity of indoor units (kBtu/h)
10
20
30
40
50
60
70
80
Total capacity of indoor units (kBtu/h)
10
20
30
40
50
60
70
80
Total capacity of indoor units (kBtu/h)
208, 230 V
Ratio of current
OCH811B
30
4-4-8. PUMY-P60NKMU4
Ratio of capacity
Ratio of power input
1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
1.2 1.0 0.8 0.6 0.4 0.2 0.0
0
G(x)
10
20
30
40
50
60
70
80
Total capacity of indoor units (kBtu/h)
10
20
30
40
50
60
70
80
Total capacity of indoor units (kBtu/h)
10
20
30
40
50
60
70
80
Total capacity of indoor units (kBtu/h)
208, 230 V
Ratio of current
OCH811B
31
4-5. CORRECTING CAPACITY FOR CHANGES IN THE LENGTH OF REFRIGERANT PIPING
(1) During cooling, obtain the ratio (and the equivalent piping length) of the
outdoor units rated capacity and the total in-use indoor capacity, and find
the capacity ratio corresponding to the standard piping length from Figure 13
to 17. Then multiply by the cooling capacity from Figure 7 and 8 in “4-2.
CORRECTION BY TEMPERATURE” to obtain the actual capacity.
(2) During heating, find the equivalent piping length, and find the capacity
ratio corresponding to standard piping length from Figure 18. Then multiply by
the heating capacity from Figure 9 and 10 in “4-2. CORRECTION BY TEMPERATURE”
to obtain the actual capacity.
(1) Capacity Correction Curve Figure 13 PUMY-P36NKMU4
1.00 0.95
PUMY-HP36NKMU2
Total capacity of indoor unit 18 [kBtu/h]
0.90
0.85
27 [kBtu/h]
Capacity ratio
0.80 36 [kBtu/h] 0.75
0.70
0.65
0.60
46.8 [kBtu/h]
0.55
0.50 0
50 100 150 200 250 300 350 400 450 500 550 600 Piping equivalent length (ft)
Figure 14 PUMY-HP42NKMU2
Total capacity of indoor unit 1.00
0.95 21 [kBtu/h] 0.90
0.85 31.5 [kBtu/h] 0.80
Capacity ratio
0.75
0.70
42 [kBtu/h]
0.65
54.6 [kBtu/h]
0.60
0.55
0.50 0
50 100 150 200 250 300 350 400 450 500 550 600 Piping equivalent length (ft)
OCH811B
32
Figure 15 PUMY-P48NKMU4
PUMY-HP48NKMU2
Capacity ratio
1.00 0.95 0.90 0.85 0.80 0.75 0.70 0.65 0.60 0.55 0.50
0
Total capacity of indoor unit 24 [kBtu/h] 36 [kBtu/h] 48 [kBtu/h] 62.4 [kBtu/h] 50 100 150 200 250 300 350 400 450 500 550 600 Piping equivalent length (ft)
Figure 16 PUMY-P60NKMU4
1.00
Total capacity of indoor unit
Capacity ratio
0.95 30 [kBtu/h] 45 [kBtu/h] 0.90
60 [kBtu/h] 0.85
0.80 78 [kBtu/h] 0.75
0.70 0
20 40 60 80 100 120 140 160 180 200 220 240 260 Piping equivalent length (ft)
OCH811B
33
Figure 17 PUMY-P36NKMU4
PUMY-P48NKMU4
1.00
PUMY-HP36NKMU2 PUMY-HP42NKMU2 PUMY-HP48NKMU2
0.95
0.90
Capacity ratio
0.85
0.80
0.75
0.70 0
50 100 150 200 250 300 350 400 450 500 550 600 Piping equivalent length (ft)
Figure 18 PUMY-P60NKMU4
1.00
0.95
Capacity ratio
0.90
0.85
0.80
0.75
0.70 0
20 40 60 80 100 120 140 160 180 200 220 240 260 Piping equivalent length (ft)
(2) Method for Obtaining the Equivalent Piping Length Equivalent length = (length of piping to farthest indoor unit) + (0.99 × number of bends in the piping) (ft)
4-5-1. Correction of Heating Capacity for Frost and Defrosting If heating capacity has been reduced due to frost formation or defrosting, multiply the capacity by the appropriate correction factor from the following table to obtain the actual heating capacity.
Correction factor diagram
Outdoor Intake temperature <W.B.°F (°C)> 43(6) 37(4) 36(2) 32(0) 28(-2) 25(-4) 21(-6) 18(-8) 14(-10) 5(-15) -4(-20) -13(-25)
Correction factor
1.00 0.98 0.89 0.88 0.89 0.90 0.95 0.95 0.95 0.95 0.95 0.95
OCH811B
34
4-6. NOISE CRITERION CURVES
PUMY-P36NKMU4 PUMY-HP36NKMU2
MODE SPL(dB) COOLING 49 HEATING 53
LINE
90
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
80
70 NC-70
60 NC-60
50 NC-50
40 NC-40
30 NC-30
APPROXIMATE
20 THRESHOLD OF
HEARING FOR CONTINUOUS NOISE
NC-20
10 63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
PUMY-P48NKMU4 PUMY-HP48NKMU2
90
MODE SPL(dB) COOLING 51 HEATING 54
LINE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
80
70 NC-70
60 NC-60
50 NC-50
40 NC-40
30 NC-30
APPROXIMATE
20 THRESHOLD OF
HEARING FOR CONTINUOUS NOISE
NC-20
10 63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
OCH811B
35
PUMY-HP42NKMU2
90
MODE SPL(dB) COOLING 50 HEATING 54
LINE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
80
70 NC-70
60 NC-60
50 NC-50
40 NC-40
30 NC-30
APPROXIMATE
20 THRESHOLD OF
HEARING FOR CONTINUOUS NOISE
NC-20
10 63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
PUMY-P60NKMU4
90
MODE SPL(dB) COOLING 58 HEATING 59
LINE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
80
70 NC-70
60 NC-60
50 NC-50
40 NC-40
30 NC-30
APPROXIMATE
20 THRESHOLD OF
HEARING FOR CONTINUOUS NOISE
NC-20
10 63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
MICROPHONE
1 m [3.3 ft]
UNIT
1.5 m [4.9 ft]
GROUND
5 OUTLINES AND DIMENSIONS
Unit: mm
1 1
*1
OCH811B
36
6 WIRING DIAGRAM
PUMY-P36NKMU4
PUMY-P48NKMU4
MULTI. B. M1
63H TRS
63LS 63HSTH7 TH6 TH3 TH4 TH2
22
LEV-A LEV-B
M
M
MS 3
t t t t t
11
is the switch position.
1
M2 MS 3
1
CNF1 7WH
CNF2 7WH
1
2 3 CNDC PK
1 31 4 1 2 2 1 12 63HS TH7/6 TH3 TH4 TH2
CN3D CN3S CN3N WHRDBU
WHRDWHWHBK
1 31 31 3 1 5 1 5
CNLVA CNLVB
WH RD
13 63LS
BU
13 63H
YE
CN2 1 RD 7
1 CN51 5 WH
7 F1
CN4
WH 12
SWU2SWU1
SW5
SW6
SW9 1
SW1 SW8 1 SW2 1
SW4 1 SW3 SW7
LED1 LED2
X505 X504 X503 X502 X501
F2
1 3 SV3 1 321S4 1 3 SV2 1 3 SV1 1 3 SS/BH
BK
GN BU GY
WH
2
LED3 1 2 CNAC
RD
CNS1 CNS2 CN41 CN40 RDYEWH WH
2 1 2 14 14 1
CN102 WH 41
21S4
SV1
2
22
4
M-NET P.B. BK
14 CN2
TB1WH CN1
WH 53 1
TO INDOOR UNIT OR BRANCH BOX 30V DC(Non-polar)
TB3 M1 RD
2
RD M2
BK S
FOR CENTRALIZED CONTROL 30V DC(Non-polar)
TB7 M1 YE 2
YE M2
S
P. B.
W BK MS V WH 3 U RD
MC
IC600 W
V U
7
TO BRANCH BOX 208/230V AC 60Hz
TB1B B1 RD
FUSE1
B2 BU FUSE2
GNYE
1 CN2 7 RD
TH8
2
2
2
t
12 12 CN6 CN4
2
1
CNAC2 3RD 1
3CNWAHC1 LI NI
WHWHCNDC
PK1 3
IC500
BK EI
BK E3
BK E4
TB3A
TB2A
TB1A
BK TB3B WH TB2B RD TB1B
BK
WH
RD
DCL1 DCL2
DCL3
*2
POWER SUPPLY 208/230V AC 60Hz
TB1
L1 RD L2 BU
GNYE
*1 MODEL SELECTION
The black square indicates a switch position.
MODEL SW2 SW4 SW8 SW9 MODEL SW2 SW4 SW8 SW9
ON
ON
ON
ON
ON
ON
ON
ON
PUMY-P36NKMU4 OFF OFF
OFF
OFF
PUMY-P48NKMU4 OFF OFF
OFF
OFF
56
123456
12
3456
56
123456
12
3456
-
- 2 Use copper supply wires.
3 When a Branch box is connected,
Utiliser des fils d’alimentation en cuivre. SW2-5 should be ON.
LEGEND
SYMBOL
NAME
SYMBOL
NAME
SYMBOL
NAME
TB1
Terminal BlockPower Supply
TH8
ThermistorHeat Sink
SW5
SwitchFunction Selection
TB1B
Terminal BlockBranch box
TRS
Thermal Protector
SW6
SwitchFunction Selection
TB3
Terminal BlockIndoor/Outdoor, Branch LEV-A, LEV-B Linear Expansion Valve
SW7
SwitchFunction Selection
box/Outdoor Transmission Line
DCL1, DCL2, DCL3 Reactor
SW8
SwitchModel Selection
TB7
Terminal Block
P.B.
Power Circuit Board
SW9
SwitchFunction/Model Selection
Centralized Control Transmission Line U/V/W Connection Terminal U/V/W-Phase SWU1 SwitchUnit Address Selection, ones digit
FUSE1, FUSE2 FuseT20A L250V
LI
Connection Terminal L1-Phase
SWU2 SwitchUnit Address Selection, tens digit
MC
Motor for Compressor
NI
Connection Terminal L2-Phase
SS/BH Connector Connection for Option
MF1, MF2 Fan Motor
TB1A, TB2A, TB3A Connection Terminal Reactor
CN3D Connector Connection for Option
21S4
Solenoid Valve Coil 4-Way Valve TB1B, TB2B, TB3B
CN3S Connector Connection for Option
63H
High Pressure Switch
IC500 Converter
CN3N Connector Connection for Option
63HS
High Pressure Sensor
IC600 Inverter
CN51 Connector Connection for Option
63LS
Low Pressure Sensor
EI, E3, E4 ConnectionTerminal Electrical Parts Box LED1, LED2 LEDOperation Inspection Display
SV1
Solenoid Valve Coil Bypass Valve MULTI.B. Multi Controller Circuit Board
LED3
LEDPower Supply to Main Microcomputer
TH2
Thermistor HIC Pipe
SW1
SwitchDisplay Selection
F1, F2 FuseT6.3A L250V
TH3
Thermistor Outdoor Liquid Pipe
SW2
SwitchFunction/Model Selection X501X505 Relay
TH4
Thermistor Compressor
SW3
SwitchTest Run
M-NET P.B. M-NET Power Circuit Board
TH6
Thermistor Suction Pipe
SW4
SwitchModel Selection
TB1
ConnectionTerminal Electrical Parts Box
TH7
ThermistorAmbient
OCH811B
37
PUMY-P60NKMU4
MULTI. B. M1
63H TRS
63LS 63HSTH7 TH6 TH3 TH4 TH2
22
LEV-A LEV-B
M
M
MS 3
t t t t t
11
is the switch position.
1
M2 MS 3
1
CNF1 7WH
CNF2 7WH
1
2 3 CNDC PK
1 31 4 1 2 2 1 12 63HS TH7/6 TH3 TH4 TH2
WHRDWHWHBK
13 63LS
BU
13 63H
YE
F1
CN3D CN3S CN3N WHRDBU
1 31 31 3 1 5 1 5 CNLVA CNLVB WH RD
SWU2SWU1 SW9 1
SW5
SW6
SW1 SW8 1 SW2 1
CN2 1 RD 7
7
CN4 WH
12
1 CN51 5 WH
SW4 1 SW3 SW7 LED1 LED2
X505 X504 X503 X502 X501
F2
1 3 SV3 1 321S4 1 3 SV2 1 3 SV1 1 3 SS/BH
BK GN BU GY
WH
1 2 CNAC RD
LED3
2
CNS1 CNS2 CN41 CN40 RDYEWH WH
2 1 2 14 14 1
CN102 WH 41
21S4
SV1
2
22
4 M-NET P.B.
P. B.
TO INDOOR UNIT OR BRANCH BOX 30V DC(Non-polar)
TB3 M1 RD
2
RD M2
S
BK
W BK MS V WH 3 U RD
MC
TH8 7 2
t
21 21 7 CN4 CN6 WHWH W
V U
CN2 1 RD
IC500
IC600
14
CN2
BK
TB1WH CN1
WH
53 1
2
TB3B
TB2B
TB1B
TB1A
TB2A
TB3A
TB4 TB3
FOR CENTRALIZED CONTROL 30V DC(Non-polar)
TB7 M1 YE 2
YE M2
S
BK
WH
RD
DCL1 DCL2 DCL3
RD
WH
BK
CNDC PK 1 3
2
BK
BK
BK
TO BRANCH BOX 208/230V AC 60Hz
TB1B B1 RD
B2 BU GNYE
FUSE1 FUSE2
N. F.
E4 E3
BU TB2
EI
RD TB1
2
2
1
CNAC2 3RD 1
3CNWAHC1
LI
*2
POWER SUPPLY 208/230V AC 60Hz
TB1 L1 RD L2 BU
GNYE
NI
*1 MODEL SELECTION
The black square indicates a switch position.
MODEL SW2 SW4 SW8 SW9
ON
ON
ON
ON
PUMY-P60NKMU4 OFF OFF
OFF
OFF
56
123456
12
3456
2 Use copper supply wires. Utiliser des fils d’alimentation en cuivre.
3 When a Branch box is connected, SW2-5 should be ON.
LEGEND
SYMBOL
NAME
SYMBOL
NAME
SYMBOL
NAME
TB1 TB1B
Terminal BlockPower Supply Terminal BlockBranch box
TRS
Thermal Protector
LEV-A, LEV-B Linear Expansion Valve
SW4 SW5
SwitchModel Selection SwitchFunction Selection
TB3
Terminal BlockIndoor/Outdoor, Branch DCL1, DCL2, DCL3 Reactor
SW6
SwitchFunction Selection
box/Outdoor Transmission Line
N.F.
Noise Filter Board
SW7
SwitchFunction Selection
TB7
Terminal Block
LI
Centralized Control Transmission Line NI
Connection Terminal L1-Phase Connection Terminal L2-Phase
SW8 SW9
SwitchModel Selection SwitchFunction/Model Selection
FUSE1, FUSE2 FuseT20A L250V
MC
Motor for Compressor
TB1, TB2 ConnectionTerminal Power Circuit Board SWU1 EI, E3, E4 ConnectionTerminal Electrical Parts Box SWU2
SwitchUnit Address Selection, ones digit SwitchUnit Address Selection, tens digit
MF1, MF2 Fan Motor
P.B.
Power Circuit Board
SS/BH Connector Connection for Option
21S4
Solenoid Valve Coil 4-Way Valve TB3, TB4 ConnectionTerminal Noise Filter Board CN3D Connector Connection for Option
63H
High Pressure Switch
U/V/W Connection Terminal U/V/W-Phase CN3S
Connector Connection for Option
63HS 63LS SV1 TH2
High Pressure Sensor Low Pressure Sensor Solenoid Valve Coil Bypass Valve Thermistor HIC Pipe
TB1A, TB2A, TB3A Connection Terminal Reactor TB1B, TB2B, TB3B
IC500 Converter IC600 Inverter
CN3N Connector Connection for Option
CN51
Connector Connection for Option
LED1, LED2 LEDOperation Inspection Display
LED3
LEDPower Supply to Main Microcomputer
TH3
Thermistor Outdoor Liquid Pipe
MULTI.B. Multi Controller Circuit Board
F1, F2 FuseT6.3A L250V
TH4
Thermistor Compressor
SW1
SwitchDisplay Selection
X501X505 Relay
TH6
Thermistor Suction Pipe
SW2
SwitchFunction/Model Selection M-NET P.B. M-NET Power Circuit Board
TH7
Thermistor Ambient
SW3
SwitchTest Run
TB1
ConnectionTerminal Electrical Parts Box
TH8
Thermistor Heat Sink
OCH811B
38
PUMY-HP36NKMU2
PUMY-HP42NKMU2
PUMY-HP48NKMU2
MULTI. B. M1
63H TRS 63LS 63HSTH7 TH6 TH3 TH4 TH2
22
LEV-A LEV-B
M
M
MS 3
t t t t t
11
is the switch position.
1
M2 MS 3
1
CNF1 7WH
CNF2 7WH
1
2 3 CNDC PK
1 31 4 1 2 2 1 12 63HS TH7/6 TH3 TH4 TH2
WHRDWHWHBK
13 63LS
BU
13 63H
YE
F1
CN3D CN3S CN3N WHRDBU
1 31 31 3 1 5 1 5 CNLVA CNLVB WH RD
SWU2SWU1 SW9 1
SW5
SW6
SW1 SW8 1 SW2 1
CN2 1 RD 7
7
CN4 WH
12
1 CN51 5 WH
SW4 1 SW3 SW7 LED1 LED2
X505 X504 X503 X502 X501
F2
1 3 SV3 1 3 21S4 1 3 SV2 1 3 SV1 1 3 SS/BH
BK GN BU GY
WH
1 2 CNAC RD
2
LED3
CNS1 CNS2 CN41 CN40 RDYEWH WH
2 1 2 14 14 1
CN102 WH 41
21S4
SV2
SV1
21 2
22
4 M-NET P.B.
TO INDOOR UNIT OR BRANCH BOX 30V DC(Non-polar)
TB3 M1 RD
2
RD M2
S BK
FOR CENTRALIZED CONTROL 30V DC(Non-polar)
TB7 M1 YE 2
YE M2
S
TO BRANCH BOX 208/230V AC 60Hz
TB1B B1 RD
B2 BU
FUSE1 FUSE2
GNYE
*2
POWER SUPPLY 208/230V AC 60Hz
TB1 L1 RD L2 BU
GNYE
THP BH
P. B.
W BK MS V WH 3 U RD MC
TH8 7 2
t
21 21 CN4 CN6 WHWH
7 CN2 RD
W
V U
1 IC500
IC600
TB3B
TB2B
TB1B
TB1A
TB2A
TB3A
TB4 TB3
RD
WH
BK
DCL1 DCL2 DCL3
BK
BK
BK
N. F.
E4 E3
BU TB2
EI
RD TB1
RD
WH
CNDC PK 1 3
2
BK
2
2
CNAC2
CNAC1
1 3RD 1 3WH
LI
NI
14
CN2
BK
TB1WH CN1
WH
53 1
2
*1 MODEL SELECTION
The black square indicates a switch position.
MODEL SW2 SW4 SW8 SW9 MODEL SW2 SW4 SW8 SW9 MODEL SW2 SW4 SW8 SW9
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
PUMY-HP36NKMU2 OFF OFF
OFF
OFF
PUMY-HP42NKMU2 OFF OFF
OFF
OFF
PUMY-HP48NKMU2 OFF OFF
OFF
OFF
56
123456
12
3456
56
123456
12
3456
56
123456
12
3456
-
- 2 Use copper supply wires.
3 When a Branch box is connected, SW2-5 should be ON.
Utiliser des fils d’alimentation en cuivre.
LEGEND
SYMBOL
NAME
SYMBOL
NAME
SYMBOL
NAME
TB1 TB1B TB3
Terminal BlockPower Supply
TH7
Thermistor Ambient
Terminal BlockBranch box
TH8
Thermistor Heat Sink
Terminal BlockIndoor/Outdoor, Branch TRS
Thermal Protector
box/Outdoor Transmission Line
LEV-A, LEV-B Linear Expansion Valve
SW3 SW4 SW5 SW6
SwitchTest Run SwitchModel Selection SwitchFunction Selection SwitchFunction Selection
TB7
Terminal Block
DCL1, DCL2, DCL3 Reactor
Centralized Control Transmission LineN.F.
Noise Filter Board
FUSE1, FUSE2 FuseT20A L250V
LI
Connection Terminal L1-Phase
MC
Motor for Compressor
NI
Connection Terminal L2-Phase
SW7 SW8 SW9 SWU1
SwitchFunction Selection SwitchModel Selection SwitchFunction/Model Selection SwitchUnit Address Selection, ones digit
MF1, MF2 Fan Motor
TB1, TB2 ConnectionTerminal Power Circuit Board SWU2 SwitchUnit Address Selection, tens digit
21S4 63H
Solenoid Valve Coil 4-Way Valve EI, E3, E4 ConnectionTerminal Electrical Parts Box SS/BH
High Pressure Switch
P.B.
Power Circuit Board
CN3D
Connector Connection for Option Connector Connection for Option
63HS 63LS
High Pressure Sensor Low Pressure Sensor
TB3, TB4 ConnectionTerminal Noise Filter Board CN3S U/V/W Connection Terminal U/V/W-Phase CN3N
Connector Connection for Option Connector Connection for Option
SV1
Solenoid Valve Coil Bypass Valve TB1A, TB2A, TB3A Connection Terminal Reactor
CN51
Connector Connection for Option
SV2
Solenoid Valve Coil Switching Valve TB1B, TB2B, TB3B
LED1, LED2 LEDOperation Inspection Display
BH
Base Heater
IC500 Converter
LED3
LEDPower Supply to Main Microcomputer
THP
Thermal Protector
IC600 Inverter
F1, F2 FuseT6.3A L250V
TH2
Thermistor HIC Pipe
MULTI.B. Multi Controller Circuit Board
X501X505 Relay
TH3
Thermistor Outdoor Liquid Pipe
SW1
SwitchDisplay Selection
M-NET P.B. M-NET Power Circuit Board
TH4
Thermistor Compressor
SW2
SwitchFunction/Model Selection TB1
ConnectionTerminal Electrical Parts Box
TH6
Thermistor Suction Pipe
OCH811B
39
40
23 23
23 23
OCH811B
23 23
23 23
23 23
Applicable outdoor units for this service manual
For centralized management
Outdoor unit 051
Piping
For Branch box/CITY MULTI indoor unit M-NET cable
78 78 78 78 78 78
901
901
45 6
45 6
Address SW
901
901
45 6
45 6
M-NET cable shielding wire must be connected to each refrigerant system
(outdoor and branch box).
Set addresses:
Outdoor unit ………… 051100 Branch box …………… 001046 CITY MULTI ………….. 001050
Outdoor unit has no 100s digit switch. The address automatically become “100”
if it is set as “0150”.
Make sure that the wiring between the branch box and indoor unit is properly
done, matching with the piping connection.
A
Signal line
A Control Indoor unit
A (001)
M-NET remote controller cannot be connected with refrigerant system including branch box.
Refrigerant systems including branch box cannot be grouped with using M-NET remote controller or system controller.
B
A Control Indoor unit
B (002)
Other CITY MULTI outdoor unit
MA remote controller
MA remote controller
For centralized management
Outdoor unit 061
For Branch box/CITY MULTI indoor unit
Branch box 001 C
A Control Indoor unit
C (003)
MA remote controller
SW1 ON
123456
45 6
Address SW
901
901
45 6
D
E
A
A Control
Indoor unit D
(004)
Piping
A Control Indoor unit
E (005)
A Control
Indoor unit A
(006)
WL-RC
WL-RC
MA remote controller
SW1 ON
123456
Branch box 006
B
C
A Control
Indoor unit B
(007)
A Control
Indoor unit C
(008)
WL-RC
WL-RC
78 78
45 6
45 6
23 23
Address SW
901
901
CITY MULTI Indoor unit
011
Address SW
901
901
CITY MULTI Indoor unit
012
Address SW
901
901
78 78
78
78
23
23
45 6
45 6
45 6
45 6
M-NET
remote 111 controller
Address SW
1 901
78 78
901
23 23
M-NET remote 161 controller
Address SW
1 901
78
45 6
23
78
901
23
45 6
45 6
45 6
Note: The refrigerant system which includes branch box cannot be operated as a group.
23 23
78 78
45 6
CITY MULTI Indoor unit
013
Address SW
901
901
45 6
45 6
CITY MULTI Indoor unit
014
Address SW
901
901
45 6
78 78 78 78
45 6
45 6
NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION
7-1. TRANSMISSION SYSTEM SETUP
23 23
CITY MULTI Indoor unit
015
Address SW
901
901
7-2. Special Function Operation and Settings for M-NET Remote Controller
For the detailed procedure of “group settings” and “paired settings”, refer to
the remote controller’s manuals.
7-3. REFRIGERANT SYSTEM DIAGRAM
PUMY-P36NKMU4 PUMY-P48NKMU4
Service port
Refrigerant Gas pipe
Strainer
Ball valve
Check valve
Thermistor (TH6)
Low pressure sensor(63LS)
4-way valve
Check valve
Solenoid valve (SV1)
Strainer
Strainer
Fusible plug
Oil separator Capillary tube
High pressure sensor (63HS)
High pressure switch (63H)
Thermistor (TH4)
Refrigerant flow in cooling Refrigerant flow in heating
Thermistor (TH7)
Distributor Thermistor (TH3)
Refrigerant Liquid pipe
Thermistor (TH2)
Strainer
Service port
Strainer
Restrictor valve
HIC L EV -B
Accumulator Strainer
Compressor
Thermal protector
L EV -A
Strainer
Capillary tube for oil separator [inch(mm)]: ø0.098 × ø0.031 × L39.37 (ø2.5 × ø0.8 × L1000)
OCH811B
41
PUMY-HP36NKMU2 PUMY-HP42NKMU2 PUMY-HP48NKMU2
Service port
Refrigerant Gas pipe
Strainer
Ball valve
Check valve
Thermistor (TH6)
Low pressure sensor(63LS)
Solenoid valve (SV2)
Restrictor valve
Refrigerant Liquid pipe
Thermistor (TH2)
Strainer
Service port
Strainer
HIC L EV -B
4-way valve
Check valve
Refrigerant flow in cooling Refrigerant flow in heating
Thermistor (TH7)
Solenoid valve (SV1)
Strainer
Oil separator High pressure sensor (63HS)
Capillary tube
Strainer Fusible plug
High pressure switch (63H)
Thermistor (TH4)
Thermal protector
Distributor Thermistor (TH3)
Accumulator
Compressor
Strainer
L EV -A
Strainer
Capillary tube for oil separator [inch(mm)]: ø0.098 × ø0.031× L39.37 (ø2.5 × ø0.8 × L1000)
PUMY-P60NKMU4
Service port Refrigerant Gas pipe
Strainer
Ball valve
Check valve
Thermistor (TH6)
Low pressure sensor(63LS)
Strainer
Refrigerant Liquid pipe
Thermistor (TH2)
Strainer
Service port
Strainer
HIC L EV -B
4-way valve
Check valve
Refrigerant flow in cooling Refrigerant flow in heating
Thermistor (TH7)
Solenoid valve (SV1)
Strainer
Capillary tube Strainer
Oil separator High pressure sensor (63HS)
Capillary tube
High pressure switch (63H) Thermistor (TH4)
Accumulator
Compressor
Fusible plug
Thermal protector
Distributor Thermistor (TH3)
Strainer
L EV -A
Strainer
Capillary tube for oil separator [inch(mm)]: ø0.098 × ø0.031 × L31.50 (ø2.5 × ø0.8 × L800) Capillary tube for solenoid valve [inch(mm)]: ø0.157 × ø0.117 × L19.685 (ø4.0 × ø3.0 × L500)
OCH811B
42
PUMY-P36NKMU4
PUMY-P48NKMU4
Thermistor(TH-A to E)
Room temperature thermistor (TH1 or RT11)
Condenser/ evaporator temperature thermistor
Pipe temperature thermistor (TH2 or RT13)
LEV-A to E (Linear expansion)
Service port Strainer
4-Way Valve (21S4)
Ball valve
Solenoid valve(SV1)
Check valve
Thermistor(TH6)
Low pressure sensor(63LS)
Restrictor valve
Thermistor(TH2)
Stop valve
Strainer
HIC
Check valve
Thermistor(TH7)
Strainer Strainer
Oil separator High pressure
Capillary
switch(63H)
tube1
Fusible plug
High pressure sensor(63HS)
Thermistor(TH4)
Thermal protector
Accumulator
Compressor
Thermistor(TH8)
Distributor
Thermistor(TH3)
Service port
Strainer
LEV-B
Strainer
LEV-A
Strainer
Strainer Capillary
tube2
Indoor
Branch box
Outdoor unit
Refrigerant flow in cooling Refrigerant flow in heating
Unit: inch (mm)
Capillary tube 1
Capillary tube 2 behind LEV
(For return of oil from oil separator)
(in cooling mode)
Outdoor unit Branch box
ø0.098 × ø0.031 × L(39-1/2) (ø2.5 × ø0.8 × L1000)
(ø0.157 × ø0.117 × L(5-1/8)) × 5 ((ø4.0 × ø3.0 × L130) × 5)
(ø0.157 × ø0.117 × L(5-1/8)) × 3 ((ø4.0 × ø3.0 × L130) × 3)
PUMY-HP36NKMU2
PUMY-HP42NKMU2
PUMY-HP48NKMU2
Thermistor(TH-A to E)
Room temperature thermistor (TH1 or RT11)
Condenser/ evaporator temperature thermistor
Pipe temperature thermistor (TH2 or RT13)
LEV-A to E (Linear expansion)
Service port Strainer
4-Way Valve (21S4)
Ball valve
Solenoid valve(SV1)
Check valve
Thermistor(TH6)
Low pressure sensor(63LS)
Solenoid valve(SV2)
Thermistor(TH2)
Stop valve
Strainer
Restrictor valve HIC
Check valve
Thermistor(TH7)
Strainer Strainer
Oil separator High pressure
Capillary
sensor(63HS)
tube1
High pressure switch(63H)
Distributor
Thermistor(TH3)
Fusible plug
Thermistor(TH4)
Thermal protector
Accumulator
Compressor
Thermistor(TH8)
Service port
Strainer
LEV-B
Strainer
LEV-A
Strainer
Strainer Capillary
tube2
Indoor
Branch box
Refrigerant flow in cooling Refrigerant flow in heating
Outdoor unit
Unit: inch (mm)
Capillary tube 1
Capillary tube 2 behind LEV
(For return of oil from oil separator)
(in cooling mode)
Outdoor unit
ø0.098 × ø0.031 × L(39-1/2) (ø2.5 × ø0.8 × L1000)
Branch box
(ø0.157 × ø0.117 × L(5-1/8)) × 5 ((ø4.0 × ø3.0 × L130) × 5)
(ø0.157 × ø0.117 × L(5-1/8)) × 3 ((ø4.0 × ø3.0 × L130) × 3)
OCH811B
43
PUMY-P60NKMU4
Thermistor(TH-A to E)
Room temperature thermistor (TH1 or RT11)
Condenser / evaporator temperature thermistor
Pipe temperature thermistor (TH2 or RT13)
LEV-A to E (Linear expansion)
Service port Strainer
4-Way Valve (21S4)
Check valve
Thermistor(TH7)
Ball valve
Solenoid valve(SV1)
Check valve
Thermistor(TH6)
Low pressure sensor(63LS)
Capillary tube2
Oil separator
Strainer Strainer Strainer
Capillary tube1
Fusible
High pressure switch(63H)
High pressure sensor(63HS)
plug Thermistor(TH4)
Thermistor(TH2)
Stop valve
Strainer
HIC
Accumulator
Compressor
Thermal protector
Thermistor(TH8)
Distributor
Thermistor(TH3)
Service port
Strainer
LEV-B
Strainer
LEV-A
Strainer
Strainer Capillary
tube3
Indoor
Branch box
Outdoor unit
Refrigerant flow in cooling Refrigerant flow in heating
Capillary tube 1 (For return of oil from oil separator)
Outdoor unit
ø0.098 × ø0.031 × L(39-1/2) (ø2.5 × ø0.8 × L800)
Branch box
Capillary tube 2 (For solenoid valve (SV1))
ø0.157 × ø0.117 × L(19-5/8) (ø4.0 × ø3.0 × L500)
Unit: inch (mm)
Capillary tube 3 behind LEV (in cooling mode)
(ø0.157 × ø0.117 × L(5-1/8)) × 5 ((ø4.0 × ø3.0 × L130) × 5)
(ø0.157 × ø0.117 × L(5-1/8)) × 3 ((ø4.0 × ø3.0 × L130) × 3)
OCH811B
44
7-4. SYSTEM CONTROL
7-4-1. Example for the System
· Example for wiring control cables, wiring method and address setting,
permissible lengths, and the constraint items are listed in the standard
system with detailed explanation.
A. Example of an M-NET remote controller system (address setting is necessary.)
r1 r2
Example of wiring control cables
1. Standard operation
L1 OC
(51)
L2 M-IC
(01)
M-IC
(02)
TB3 TB7
M1 M2 S M1 M2 S
TB5 TB15
M1 M2 S 1 2
TB5 TB15
M1 M2 S 1 2
Wiring Method and Address Setting
a. Use feed wiring to connect terminals M1 and M2 on transmission cable block
(TB3) for the outdoor unit (OC) to terminals M1 and M2 on the transmission
cable block (TB5) of each CITY MULTI series indoor unit (M-IC). Use non-
polarized 2-core wire.
b. Connect terminals M1 and M2 on transmission cable terminal block (TB5) for
each indoor unit with the terminal block (TB6) for M-NET the remote controller
(M-NET RC).
c. Set the address setting switch (on outdoor unit P.C.B) as shown below.
AB
AB
(101)
M-NET RC
(102)
M-NET RC
· 1 M-NET remote controller for each CITY MULTI series indoor unit · There is
no need for setting the 100 position on the M-NET remote
controller.
Unit
Range
CITY MULTI series indoor unit (M-IC)
001 to 050
Setting Method —
Outdoor unit (OC)
051 to 100
Use the smallest address of all the indoor unit plus 50.
M-NET Remote controller (M-NET RC)
101 to 150
Indoor unit address plus 100
2. Operation using 2 M-NET remote controllers
OC M-IC
(51) (01)
TB3 TB7
M1 M2 S M1 M2 S
TB5 TB15
M1 M2 S 1 2
M-IC
(02)
TB5 TB15
M1 M2 S 1 2
AB
AB
AB
AB
(101) (151)
(102) (152)
M-NET RC M-NET RC M-NET RC M-NET RC
(Main)
(Sub)
(Main)
(Sub)
· Using 2 M-NET remote controllers for each CITY MULTI series indoor unit.
a. Same as above 1.a b. Same as above 1.b c. Set address switch (on outdoor
unit P.C.B) as
shown below.
Unit
Range
Setting Method
CITY MULTI series indoor unit (M-IC)
001 to 050
—
Outdoor unit (OC)
051 to 100
Use the smallest address of all the indoor units plus 50.
Main M-NET Remote Controller 101 to 150 Indoor unit address plus 100
(M-NET RC)
Sub M-NET Remote Controller 151 to 200 Indoor unit address plus 150
(M-NET RC)
3. Group operation
OC
(51)
TB3 TB7
M1 M2 S M1 M2 S
Group A
M-IC(Main)
(01)
TB5 TB15
M1 M2 S 1 2
M-IC(Sub)
(02)
TB5 TB15
M1 M2 S 1 2
AB
(101)
M-NET RC
· Multiple CITY MULTI series indoor units operated together by 1 M-NET remote
controller
a. Same as above 1.a b. Connect terminals M1 and M2 on transmission cable
termi-
nal block (TB5) of the M-IC main unit with the most recent address within the
same CITY MULTI series indoor unit (M-IC) group to terminal block (TB6) on the
M-NET remote controller. c. Set the address setting switch (on outdoor unit
P.C.B) as shown below.
Unit
Range
Setting Method
M-IC (Main) M-IC (Sub)
Use the smallest address within 001 to 050 the same group of CITY MULTI
series indoor units.
Use an address, other than that of the M-IC (Main) from among the units 001 to
050 within the same group of indoor units. This must be in sequence with the
M-IC (Main).
Outdoor unit
051 to 100
Use the smallest address of all the CITY MULTI series indoor units plus 50.
Main M-NET
Remote Controller (M-NET RC)
101 to 150
Set at an M-IC (Main) address within the same group plus 100.
d. Use the CITY MULTI series indoor unit (M-IC) within the group with the most functions as the M-IC (Main) unit.
Combinations of 1 through 3 above are possible.
OCH811B
45
· Name, Symbol and the Maximum Remote controller Units for Connection
Name
Outdoor unit
CITY MULTI series indoor unit
M-NET remote controller
Symbol OC M-IC
M-NET RC
Maximum units for connection —
Refer to “3. SPECIFICATIONS”.
Maximum 2 M-NET RC for 1 indoor unit, Maximum 12 M-NET RC for 1 OC
Permissible Lengths
Indoor/outdoor transmission line Maximum length AWG 16 [1.25 mm²] L1 + L2 656
ft [200 m] M-NET Remote controller cable length 1. If AWG 20 to AWG 16 [0.5 to
1.25 mm²] 1, 2 33ft [10 m] 2. If the length exceeds 33ft [10
m], the exceeding section should be AWG 16 [1.25 mm²] and that section should
be a value within the total extension length of the transmission cable and
maximum transmission cable length. (L3)
Constraint items
· M-NET remote controller (M-NET RC) and MA remote controller (MA RC) cannot
be used together.
· Do not connect anything with TB15 of CITY MULTI series indoor unit (M-IC).
OC
(51)
M-IC
M-IC
(01)
(02)
TB3 TB7
M1 M2 S M1 M2 S
TB5 TB15
M1 M2 S 1 2
TB5 TB15
M1 M2 S 1 2
AB
(101)
M-NET RC
AB
NO TB15 MA-RC
Same as above Same as above
OC
(51)
TB3 TB7
M1 M2 S M1 M2 S
M-IC
(01)
TB5 TB15
M1 M2 S 1 2
M-IC
(02)
TB5 TB15
M1 M2 S 1 2
AB
AB
(101) (151)
M-NET RC M-NET RC
(Main)
(Sub)
NO NO A B
AB
AB
(102) (103) (104)
M-NET RC 1M-NET RC 2M-NET RC
(Main)
(Sub)
OC
(51)
TB3 TB7
M1 M2 S M1 M2 S
M-IC(Main)
(01)
TB5 TB15
M1 M2 S 1 2
M-IC(Sub)
(02)
TB5 TB15
M1 M2 S 1 2
NOA B (102)
M-NET RC
1 Use the CITY MULTI series indoor unit (M-IC) address plus 150 as the sub
M-NET remote controller address. In this case, it should be 152.
2 3 or more M-NET remote controllers (M-NET RC) cannot be connected to 1 CITY
MULTI series indoor unit.
1 The M-NET remote controller address is the CITY MULTI series indoor unit
main address plus 100. In this case, it should be 101.
OCH811B
46
B. Example of a group operation system with 2 or more outdoor units and an M-NET remote controller. (Address settings are necessary.)
Examples of Transmission Cable Wiring
L6 r1 r2 r3
OC (51)
TB3
TB7
M1 M2 S M1 M2 S
L2
D
OC
(53)
NO
L5
TB7 TB3
M1 M2 S M1 M2 S
L1
A
M-IC (01)
TB5 M1 M2 S
M-IC (02)
TB5 M1 M2 S
C
M-IC (05)
TB5 M1 M2 S
M-IC (06)
TB5 M1 M2 S
AB
(101) M-NET RC
L3
M-IC (03)
TB5 M1 M2 S
AB
AB
(105) (155)
M-NET RC M-NET RC
L4
E
M-IC (04)
TB5 M1 M2 S
M-IC (07)
TB5 M1 M2 S
Power Supply Unit
M1 M2 S
System controller
M1 M2 S
A: Group B: Group C: Group D: Shielded Wire E: Sub M-NET Remote Controller (
): Address example
AB
(104) M-NET RC
B
a. Always use shielded wire when making connections between the outdoor unit
(OC) and the CITY MULTI series indoor unit (M-IC), as well for all OC-OC, and
IC-IC wiring intervals.
b. Use feed wiring to connect terminals M1 and M2 and the ground terminal on
the transmission cable terminal block (TB3) of each outdoor unit (OC) to
terminals M1 and M2 on the terminal S on the transmission cable terminal block
of the CITY MULTI series indoor unit (M-IC).
c. Connect terminals M1 and M2 on the transmission cable terminal block of the
CITY MULTI series indoor unit (M-IC) that has the most recent address within
the same group to the terminal block on the M-NET remote controller (M-NET
RC).
d. Connect together terminals M1, M2 and terminal S on the terminal block for
centralized control (TB7) for the outdoor unit (OC).
e. DO NOT change the jumper connector CN41 on outdoor multi controller circuit
board. f. The earth processing of S terminal for the centralized control
terminal block (TB7) is unnecessary. Connect the termi-
nal S on the power supply unit with the earth. g. Set the address setting
switch as follows.
Unit
Range
Setting Method
M-IC (Main) M-IC (Sub) Outdoor Unit
01 to 50 01 to 50 51 to 100
Use the smallest address within the same group of CITY MULTI series indoor units. Use an address, other than the M-IC (Main) in the same group of CITY MULTI series indoor units. This must be in sequence with the M-IC (Main). Use the smallest address of all the CITY MULTI series indoor units plus 50. The address automatically becomes “100” if it is set as “0150”.
Main M-NET Remote Controller 101 to 150 Set at an M-IC (Main) address within the same group plus 100.
Sub M-NET Remote Controller 151 to 200 Set at an M-IC (Main) address within the same group plus 150.
MA Remote Controller
—
Address setting is not necessary. (Main/sub setting is necessary.)
h. The group setting operations among the multiple CITY MULTI series indoor units are done by the M-NET remote controller (M-NET RC) after the electrical power has been turned on.
OCH811B
47
Wiring Method Address Settings
· Name, Symbol, and the Maximum Units for Connection
Permissible Length
· Maximum line length via outdoor unit: L1+L2+L3+L4, L3+L4+L5+L6, L1+L2+L5+L6
1640 ft [500 m] (AWG16 [1.25 mm² ]) · Indoor/outdoor transmission line Maximum
length: L1, L3+L4, L2+L5, L6 656 ft [200 m] (AWG16 [1.25 mm²]) · M-NET Remote
controller cable length: 1, 2+ 3 33 ft [10 m] (AWG20 to AWG16 [0.5 to 1.25
mm²])
If the length exceeds 33 ft [10 m], use an AWG16 [1.25 mm²] shielded wire. The
section of the cable that exceeds 33 ft [10 m] must be included in the max
length via outdoor units and max transmission cable length.
OC (51)
TB3
TB7
M1 M2 S M1 M2 S
A
M-IC (01)
TB5 M1 M2 S
M-IC (02)
TB5 M1 M2 S
C
M-IC (05)
TB5 M1 M2 S
M-IC (06)
TB5 M1 M2 S
Prohibited items
D
OC (53)
NO
TB3 TB7 M1 M2 S M1 M2 S
AB
(101) M-NET RC
M-IC (03)
TB5 M1 M2 S
M-IC (04)
TB5 M1 M2 S
AB
AB
(105) (155)
M-NET RC M-NET RC
E NO
M-IC (07)
TB5 M1 M2 S
Power Supply Unit
M1 M2 S
System controller
M1 M2 S
A : Group B : Group C : Group D : Shielded Wire E : Sub M-NET Remote
Controller ( ): Address example
AB
(104) M-NET RC
B
· Never connect together the terminal blocks (TB5) for transmission wires for
CITY MULTI series indoor unit (M-IC) that have been connected to different
outdoor units (OC).
· Set all addresses to ensure that they are not overlapped. · M-NET remote
controller and MA remote controller cannot be connected with the CITY MULTI
series indoor unit of the
same group wiring together.
OCH811B
48
C. Example of an MA remote controller system (address setting is not necessary.) NOTE: In the case of same group operation, need to set the address that is only main CITY MULTI series indoor unit.
Example of wiring control cables 1. Standard operation
L1 OC
(00)
L2
M-IC
(00)
M-IC
(00)
TB3 TB7
M1 M2 S M1 M2 S
TB5 TB15
M1 M2 S 1 2
TB5 TB15
M1 M2 S 1 2
Wiring Method and Address Setting
a. Use feed wiring to connect terminals M1 and M2 on transmission cable block
(TB3) for the outdoor unit (OC) to terminals M1 and M2 on the transmission
cable block (TB5) of each CITY MULTI series indoor unit (M-IC). Use non-
polarized 2-core wire.
b. Connect terminals 1 and 2 on transmission cable terminal block (TB15) for
each CITY MULTI series indoor unit with the terminal block for the MA remote
controller (MA-RC).
r3
6 r1
r5 r2
· 1 MA remote controller for each indoor unit
AB MA-RC
AB MA-RC
2. Operation using 2 remote controllers
OC
(00)
M-IC
(00)
TB3 TB7
M1 M2 S M1 M2 S
TB5 TB15
M1 M2 S 1 2
M-IC
(00)
TB5 TB15
M1 M2 S 1 2
r4
· Using 2 MA remote controllers for each CITY MULTI series indoor unit
3. Group operation
OC
(00)
AB
AB
MA-RC (Main)
MA-RC (Sub)
M-IC
(00)
TB3 TB7
M1 M2 S M1 M2 S
TB5 TB15
M1 M2 S 1 2
AB MA-RC
M-IC
(00)
TB5 TB15
M1 M2 S 1 2
AB
· Multiple indoor units operated
together by 1 MA remote con-
MA-RC
7
troller
Combinations of 1 through 3 above are possible.
a. The same as above a b. The same as above b c. In the case of using 2 remote
controllers, connect
terminals 1 and 2 on transmission cable terminal block (TB15) for each indoor
unit with the terminal block for 2 MA remote controllers. · Set either one of
the controllers to “sub remote
controller”. Refer to the installation manual of MA remote controller.
a. The same as above a b. The same as above b c. In the case of group
operation using MA remote
controller (MA-RC), connect terminals 1 and 2 on transmission cable terminal
block (TB15) of each CITY MULTI series indoor unit. Use non-polarized 2-core
wire. d. In the case of same group operation, need to set the address that is
only main CITY MULTI series indoor unit. Please set the smallest address
within number 0150 of the CITY MULTI series indoor unit with the most
functions in the same group.
OCH811B
49
Permissible Lengths
Prohibited items
Indoor/outdoor transmission line The MA remote controller and the M-NET remote controller cannot be used together with
Maximum length:
the CITY MULTI series indoor unit of the same group.
L1 + L2 656 ft [200 m] (AWG 16 M-NET remote controller cannot be connected without address setting.
[1.25 mm²])
OC
MA remote controller cable length:
(00)
1, 2 656 ft [200 m] (AWG 22
to AWG 16 [0.3 to 1.25 mm²])
M-IC
M-IC
(00)
(00)
TB3 TB7
M1 M2 S M1 M2 S
TB5 TB15
M1 M2 S 1 2
TB5 TB15
M1 M2 S 1 2
NOA B (00)
M-NET RC
AB MA-RC
AB MA-RC
Indoor/outdoor transmission line Maximum length: L1 + L2 656 ft [200 m] (AWG
16 [1.25 mm²]) MA remote controller cable length:
3 + 4, 5 656 ft [200 m] (AWG 22 to AWG 16 [0.3 to 1.25 mm²])
3 MA remote controllers or more cannot be connected with the CITY MULTI series indoor unit of the same group.
OC
(00)
TB3 TB7
M1 M2 S M1 M2 S
M-IC
(00)
TB5 TB15
M1 M2 S 1 2
M-IC
(00)
TB5 TB15
M1 M2 S 1 2
AB
AB
AB
NO
AB
AB
MA-RC (Main)
MA-RC (Main)
MA-RC (Sub)
MA-RC (Main)
MA-RC (Sub)
Indoor/outdoor transmission line Maximum length: L1 + L2 656 ft [200 m] (AWG 16 [1.25 mm²])
The second MA remote controller is connected with the terminal block (TB15) for the MA remote controller of the same CITY MULTI series indoor unit (M-IC) as the first MA remote control.
MA remote controller cable length:
OC
6 + 7 656 ft [200 m] (AWG 22 to
AWG 16 [0.3 to 1.25 mm²])
(00)
M-IC
M-IC
(00)
(00)
TB3 TB7
M1 M2 S M1 M2 S
TB5 TB15
M1 M2 S 1 2
TB5 TB15
M1 M2 S 1 2
NO
AB
AB
OCH811B
MA-RC
50
MA-RC
D. Example of a group operation with 2 or more outdoor units and an MA remote
controller. (Address settings are necessary.)
L1
OC (51)
TB3 TB7 M1 M2 S M1 M2 S
M-IC
(01)
TB5 TB15 M1 M2 S 1 2
m2
M-IC
(02)
TB5 TB15 M1 M2 S 1 2
M-IC (05)
m2
M-IC
(06)
TB5 TB15 M1 M2 S 1 2
TB5 TB15 M1 M2 S 1 2
Examples of Transmission Cable Wiring
L6 m3
m 1 m1
m1 m4
m3
L2
AB
MA-RC
AB
AB
MA-RC MA-RC
L3
L4
OC
(53)
TB3
NO
TB7
M1 M2 S M1 M2 S
L5
M-IC
(03)
TB5 TB15 M1 M2 S 1 2
M-IC (04)
TB5 TB15 M1 M2 S 1 2
M-IC (07)
TB5 TB15 M1 M2 S 1 2
Power Supply Unit
M1 M2 S
System controller
M1 M2 S
AB
MA-RC
: Group
: Group
: Group
: Shielded Wire
: Sub MA Remote Controller
( ): Address example
a. Always use shielded wire when making connections between the outdoor unit
(OC) and the CITY MULTI series indoor unit (M-IC), as well for all OC-OC, and
IC-IC wiring intervals.
b. Use feed wiring to connect terminals M1 and M2 and the ground terminal on
the transmission cable terminal block (TB3) of each outdoor unit (OC) to
terminals M1 and M2 on the terminal S on the transmission cable terminal block
of the CITY MULTI series indoor unit (M-IC).
c. Connect terminals 1 and 2 on the terminal block for MA remote controller
line (TB15) on the indoor unit (IC) to the terminal block on the MA remote
controller (MA). (Nonpolarized two-wire).
d. Connect together terminals M1, M2 and terminal S on the terminal block for
centralized control (TB7) for the outdoor unit (OC). e. DO NOT change the
jumper connector CN41 on outdoor multi controller circuit board. f. The earth
processing of S terminal for the centralized control terminal block (TB7) is
unnecessary. Connect the termi-
nal S on the power supply unit with the earth. g. Set the address setting
switch as follows.
Unit M-IC (Main)
M-IC (Sub)
Outdoor Unit Main M-NET Remote Controller Sub M-NET Remote Controller
MA Remote Controller
Range 01 to 50
01 to 50
51 to 100 101 to 150 151 to 200
—
Setting Method Use the smallest address within the same group of indoor units. Use an address, other than the M-IC (Main) in the same group of CITY MULTI series indoor units. This must be in sequence with the M-IC (Main). Use the smallest address of all the indoor units plus 50. The address automatically becomes “100” if it is set as “0150”. Set at an M-IC (Main) address within the same group plus 100. Set at an M-IC (Main) address within the same group plus 150. Address setting is not necessary. (Main/sub setting is necessary.)
h. The group setting operations among the multiple CITY MULTI series indoor unit is done by the M-NET remote controller (M-NET RC) after the electrical power has been turned on.
Wiring Method Address Settings
OCH811B
51
Permissible Length
· Name, Symbol, and the Maximum Units for Connection
Maximum line length via outdoor unit (M-NET cable): L1+L2+L3+L4 and
L1+L2+L6+L7 1640 ft [500 m] (AWG 16 [1.25 mm²] or more) Indoor/outdoor
transmission line Maximum length (M-NET cable): L1 and L3+L4 and L2+L6 and L7
656 ft [200 m] (AWG 16 [1.25 mm²] or more) MA Remote controller cable length:
m1 and m1+m2+m3 and m1+m2+m3+m4 656 ft [200 m] (AWG 22 to AWG 16 [0.3 to 1.25
mm²])
Prohibited items
OC (51)
TB3
TB7
M1 M2 S M1 M2 S
A
M-IC (01)
TB5 TB15 M1 M2 S 1 2
M-IC (02)
TB5 TB15 M1 M2 S 1 2
C
M-IC (05)
TB5 TB15 M1 M2 S 1 2
M-IC (06)
TB5 TB15 M1 M2 S 1 2
D
AB
MA-RC
OC (53)
NO
TB3 TB7 M1 M2 S M1 M2 S
Power Supply Unit
M1 M2 S
System controller
M1 M2 S
A : Group B : Group C : Group D : Shielded Wire E : Sub MA Remote Controller (
): Address example
M-IC (03)
TB5 TB15 M1 M2 S 1 2
M-IC (04)
TB5 TB15 M1 M2 S 1 2
AB
MA-RC
B
AB
AB
MA-RC MA-RC
E
NO
M-IC (07)
TB5 TB15 M1 M2 S 1 2
· Never connect together the terminal blocks (TB5) for transmission wires for
CITY MULTI series indoor unit (M-IC) that have been connected to different
outdoor units (OC).
· M-NET remote controller and MA remote controller cannot be connected with
the CITY MULTI series indoor unit of the same group wiring together.
OCH811B
52
E. Example of a system using Branch Box and A-Control indoor unit
Examples of Transmission Cable Wiring
OC (51)
TB3
TB7
L1
M1 M2 S M1 M2 S
L3 A
L2
OC (53)
TB7
L4
TB3
A
M1 M2 S M1 M2 S
A
Power Supply
Unit
M1 M2 S
L5
System
controller
M1 M2 S
A: Shielded wire ( ): Address example
L6
Branch Box
TB3A S1 S2 S3
TB5 M1 M2 S
(01)
TB3B S1 S2 S3
TB3C S1 S2 S3
TB3D S1 S2 S3
TB3E S1 S2 S3
m1
TB TB5/TB15
S1 A-IC 1 S2 (01) 2
S3
A B
MA-RC
TB TB5/TB15
S1 A-IC 1 S2 (02) 2
S3
A MA-RC
B
TB TB5/TB15
S1 A-IC 1 S2 (03) 2
S3
A
B MA-RC
TB
S1 A-IC S2 (04)
S3
WL-RC
TB
S1 A-IC S2 (05)
S3
WL-RC
Branch Box
TB3A S1 S2 S3
TB5 M1 M2 S
(06)
TB3B S1 S2 S3
TB3C S1 S2 S3
TB3D S1 S2 S3
TB3E S1 S2 S3
TB TB5/TB15
S1 A-IC 1 S2 (06) 2
S3
A MA-RC
B
TB TB5/TB15
S1 A-IC 1 S2 (07) 2
S3
A B
MA-RC
TB
S1 A-IC S2 (08)
S3
WL-RC
Wiring Method Address Settings
a. Always use shielded wire when making connections between the outdoor unit
(OC) and the Branch Box, as well for all OC-OC wiring intervals.
b. Use feed wiring to connect terminals M1 and M2 and the ground terminal on
the transmission cable terminal block (TB3) of each outdoor unit (OC) to
terminals M1 and M2 on the terminal S on the transmission cable terminal block
(TB5) of the Branch Box.
c. Connect terminals 1 and 2 on the transmission cable terminal block
(TB5/TB15) of the A-control indoor unit (A-IC), to the terminal block on the
MA remote controller (MA-RC).
d. Connect together terminals M1, M2 and terminal S on the terminal block for
centralized control (TB7) for the outdoor unit (OC).
e. DO NOT change the jumper connector CN41 on outdoor multi controller circuit
board. f. The earth processing of S terminal for the centralized control
terminal block (TB7) is unnecessary. Connect the termi-
nal S on the power supply unit to the earth. g. Set the address setting switch
as follows.
Unit A-IC
Branch Box Outdoor Unit MA Remote Controller
Range 01 to 50
01 to 50 51 to 100
–
Setting Method According to the set address of connected Branch Box, set the
A-IC addresses sequentially by SW1 on Branch Box. (For example, when setting
the Branch Box address to 01, A-IC addresses set 02,03,04, and 05. ) Use a
number within the range 150, but it should not make the highest address of
connected A-IC exceed 50. Use the smallest address of all the Branch Box plus
50. The address automatically becomes “100” if it is set as “0150”.
Address setting is not necessary.
OCH811B
53
Permissible Length
· Name, Symbol, and the Maximum Units for Connection
Maximum line length via outdoor unit (M-NET cable): L1+L2+L3+L4+L5 1640 ft
[500 m] (AWG16 [1.25mm2] or more) Branch box/outdoor transmission line Maximum
length (M-NET cable): L1+L2, L3+L4, L5 656 ft [200 m] (AWG16 [1.25 mm2] or
more) Indoor/branch box transmission line Maximum length (A-Control cable): L6
82 ft [25 m] (AWG14 [1.5] mm2) Remote controller cable length: m1 656 ft [200
m] (AWG22 to AWG16 [0.3 to 1.25 mm2])
Constraint items
OC (51)
TB3
TB7
M1 M2 S M1 M2 S
L3 A
OC (53)
TB7
L4
TB3
M1 M2 S M1 M2 S
A
Power Supply
Unit
M1 M2 S
L5
System
controller
M1 M2 S
L1
L2
A
NO
AB
M-NET RC (101)
Branch Box
TB3A S1 S2 S3
TB5 M1 M2 S
(01)
TB3B S1 S2 S3
TB3C S1 S2 S3
TB3D S1 S2 S3
TB3E S1 S2 S3
Branch Box
TB3A S1 S2 S3
TB5
M1 (06)
M2
S
TB3B S1 S2 S3
TB3C S1 S2 S3
L6
m1
TB TB5/TB15
S1 A-IC 1 S2 (01) 2
S3
A
B MA-RC
TB TB5/TB15
S1 A-IC 1 S2 (02) 2
S3
A MA-RC
B
TB TB5/TB15
S1 A-IC 1 S2 (03) 2
S3
A B
MA-RC
TB
S1 A-IC S2 (04)
S3
WL-RC
TB
S1 A-IC S2 (05)
S3
WL-RC
TB TB5/TB15
S1 A-IC 1 S2 (06) 2
S3
A B
MA-RC
NO TB TB5/TB15
S1 A-IC 1 S2 (07) 2
S3
TB
S1 A-IC S2 (08)
S3
WL-RC
A: Shielded wire ( ): Address example
· Plural indoor units cannot be operated by an MA single remote controller. ·
Different refrigerant systems cannot be connected together. · M-NET Remote
controller cannot be connected to this system.
OCH811B
54
TROUBLESHOOTING
8-1. CHECKPOINTS FOR TEST RUN
8-1-1. Procedures before test run (1) Before a test run, make sure that the
following work is completed.
· Installation related: Make sure that the panel of cassette type and
electrical wiring are done. Otherwise electrical functions like auto vane will
not operate normally.
· Piping related: Perform leakage test of refrigerant and drain piping. Make
sure that all joints are perfectly insulated. Check stop valves on both liquid
and gas side for full open.
· Electrical wiring related: Check ground wire, transmission cable, remote
controller cable, and power supply cable for secure connection. Make sure that
all switch settings of address or adjustments for special specification
systems are correctly settled.
(2) Safety check: With the insulation tester of 500 V, inspect the insulation
resistance. Do not touch the transmission cable and remote controller cable
with the tester. The resistance should be over 1.0 M. Do not proceed
inspection if the resistance is less than 1.0 M. Inspect between the outdoor
unit power supply terminal block and ground first, metallic parts like
refrigerant pipes or the electrical box next, then inspect all electrical
wiring of outdoor unit, indoor unit, and all linked equipment.
(3) Before operation: a) Turn the power supply switch of the outdoor unit to
on for compressor protection. For a test run, wait at least 12 hours from this
point. b) Register control systems into remote controller(s). Never touch the
ON/OFF switch of the remote controller(s). Refer to “7-2. Special Function
Operation and Settings for M-NET Remote Controller” as for settings. In MA
remote controller(s), this registration is unnecessary.
(4) More than 12 hours later from power supply to the outdoor unit, turn all
power switch to on for the test run. Perform test run according to the
“Operation procedure” table of the bottom of this page. While test running,
make test run reports.
8-1-1-1. Test run for M-NET Remote controller Refer to “12-4. TEST RUN” for
operation procedure.
OCH811B
55
8-1-2. Countermeasures For Error During Test Run
If a problem occurs during test run, a code number will appear on the remote controller (or LED on the outdoor unit), and the air conditioning system will automatically cease operating. Determine the nature of the abnormality and apply corrective measures.
Check Check code code (2 digits) (4 digits)
Trouble
Ed
0403 Serial communication error or Model selection SW error
U2 UE U7
U2
P6 EF L6 PA P5 P4 UF Pb
UP
U9
U5 U6 U8
U3
U4
U4 U4 U4 U4 U4 F5 F3 UH P4 A0 A2 A3 A6 A7 A8 E0/E4 E3/E5 E3/E5 E0/E4 EF EF EF
EF EF
1102 1302 1500
1501
1503 1508 2135 2500 2502 2503 3121 4100 4114
4210
4220
4230 4250 4400
5101
5102
5103 5105 5106 5109 5110 5201 5202 5300 5701 6600 6602 6603 6606 6607 6608
6831 6832 6833 6834 7100 7101 7102 7105 7130
Compressor temperature trouble High pressure trouble or thermal protector
trouble Superheat due to low discharge temperature trouble Refrigerant
shortage trouble Closed valve in cooling mode Freeze protection of Branch box
or Indoor unit 4-way valve trouble in heating mode Circulation water freeze
protection Water leakage Drain overflow protection Drain sensor abnormality
Out-of-range outside air temperature Compressor current interruption (Locked
compressor) Fan trouble (Indoor) Compressor overcurrent interruption/failure
in 12 VDC power supply circuit on power circuit board Voltage
shortage/overvoltage/PAM error/L1open phase/power synchronization signal error
Heat sink temperature trouble Power module trouble or overcurrent trouble Fan
trouble (Outdoor) Air inlet thermistor (TH21) open/short Compressor
temperature thermistor (TH4) open/short Liquid pipe temperature thermistor
(TH22) open/short Suction pipe temperature thermistor (TH6) open/short Gas
pipe temperature thermistor (TH23) open/short Outdoor liquid pipe temperature
thermistor (TH3) open/short Ambient temperature thermistor (TH7) open/short
HIC pipe temperature thermistor (TH2) open/short Heat sink temperature
thermistor (TH8) open/short High pressure sensor (63HS) trouble Low pressure
sensor (63LS) trouble Primary current error Contact failure of drain float
switch Duplex address error Transmission processor hardware error Transmission
bus BUSY error Signal communication error with transmission processor No ACK
error No response frame error MA communication receive error MA communication
send error MA communication send error MA communication receive error Total
capacity error Capacity code error Connecting excessive number of units and
branch boxes Address setting error
Incompatible unit combination error
Indoor
Detected Unit
Outdoor
Remote Controller
Remarks
Outdoor unit Multi controller boardPower board communication trouble Check
delay code 1202 Check delay code 1402 Check delay code 1600 Check delay code
1601 Check delay code 1501
Check delay code 1608
Check delay code 4350
Check delay code 4320
Check delay code 4330 Check delay code 4350 Check delay code 4500
Check delay code 1202
Check delay code 1211
Check delay code 1205 Check delay code 1221 Check delay code 1222 Check delay
code 1214 Check delay code 1402 Check delay code 1400 Check delay code 4310
Only M-NET Remote controller is detected. Only M-NET Remote controller is
detected. Only M-NET Remote controller is detected. Only M-NET Remote
controller is detected. Only M-NET Remote controller is detected. Only M-NET
Remote controller is detected. Only MA Remote controller is detected. Only MA
Remote controller is detected. Only MA Remote controller is detected. Only MA
Remote controller is detected.
NOTES:
1. When the outdoor unit detects No ACK error/No response error, an object
indoor unit is treated as a stop, and not assumed to be abnormal. 2. The check
codes displayed on the units may be different between the error source and
others. In that case, please refer to the check code
of error source by displayed attribute and address. 3. Refer to the service
manual of indoor unit or remote controller for the detail of error detected in
indoor unit or remote controller.
Self-diagnosis function The indoor and outdoor units can be diagnosed
automatically using the self-diagnosis switch
(SW1) and LED indication (LED1, LED2) found on the outdoor multi controller
circuit board.
LED indication : Set all contacts of SW1 to OFF. During normal operation
The LED indicates the drive state of outdoor unit.
[Example] When the compressor and SV1 are on during cooling operation.
1 23 45 67 8
Bit
1
2
3
4
5
6
Indication
Compressor operated
52C
21S4
SV1
(SV2)
—
7
8
— Always lit
OCH811B
56
8-1-3. SELF-DIAGNOSIS ACTION BY FLOWCHART
Check code
0403 (Ed)
Serial communication error or Model selection SW error
Abnormal points and detection methods
Causes and checkpoints
If serial communication between the outdoor multi controller circuit board and outdoor power circuit board is defective.
Wire breakage or contact failure of connector CN2 or CN4
Malfunction of communication circuit to power circuit board on outdoor multi
controller circuit board
Malfunction of communication circuit on outdoor power circuit board
Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis
Remedy
Check the connection of the communication line (CN2 and CN4) between the outdoor controller board and power board.
Are they connected normally?
No
Yes
Check the wiring.
Are they connected normally?
No
Yes
Connect the CN2 and CN4 properly. Replace them in the case of breakage.
Connect the wiring properly. Replace them in the case of breakage.
The communication circuit of either the outdoor controller board or power
board is defective. If unable to identify the defective circuit;
Replace the outdoor controller board if it does not recover, Replace the
outdoor power board.
OCH811B
57
Check code
1102 (U2)
Compressor temperature trouble
Chart 1 of 2
Abnormal points and detection methods
Causes and checkpoints
(1) If the TH4 temperature becomes conditions as follows:
exceeds 230°F [110 ] continuously for 5 minutes exceeds 257°F[125 ] (2) If a
pressure detected by the high pressure sensor and converted to saturation
temperature exceeds 104°F [40 ] during defrosting, and TH4 exceeds 230°F [110
].
TH4: Thermistor
Malfunction of stop valve Over-heated compressor operation caused by shortage of refrigerant Defective thermistor Defective outdoor controller board LEV performance failure Defective indoor controller board Clogged refrigerant system caused by foreign object Refrigerant shortage while in heating operation (Refrigerant liquid accumulation in compressor while indoor unit is OFF/thermo-OFF.)
Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis
Remedy
Is 5101 displayed when restarted?
Yes (5101)
No (1102)
Is the outdoor stop valve (liquid/gas) fully open?
No
Yes
Refer to the diagnosis of check code 5101. Open the stop valve (liquid/gas) fully.
Is there refrigerant leak?
Yes
ed
No (no leak)
Check the connection for thermistor wiring and indoor controller board connector.
Repair the refrigerant leakage.
Is there any abnormality on
connectors/wires such as a disconnection,
Yes
half-disconnection or breakage?
No
Continue to the next page.
OCH811B
58
Connect the connector properly (Repair or replace it in the case of breakage).
Check code
1102 (U2)
Compressor temperature trouble
Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis
Remedy
Continued from the previous page.
Chart 2 of 2
Disconnect the thermistor wiring to check the resistance.
Is the resistance detected?
No
Yes
Check the voltage and appearance of the outdoor controller board.
Is the voltage normal value?
Is it free from any trace of over-
No
heating or burning?
Yes
Disconnect the indoor LEV wiring and check the resistance.
Replace the thermistor. Replace the outdoor controller board.
Is the resistance detected?
No
Yes
Replace the indoor LEV. Replace the indoor controller board.
OCH811B
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Check code
1302 (UE)
High pressure trouble or thermal protector trouble
Chart 1 of 4
Abnormal points and detection methods
Causes and checkpoints
(1) High pressure abnormality (63H operation) If 63H operates() during
compressor operation. (602 PSIG [4.15 MPaG])
(2) High pressure abnormality (63HS detected) 1. If a pressure detected by
63HS is 625 PSIG [4.31 MPaG]or more during compressor operation. 2. If a
pressure detected by 63HS is 600 PSIG [4.14 MpaG] or more for 3 minutes during
compressor operation.
(3) Compressor temperature abnormality (TRS operation) If TRS operates()
during compressor operation. (266°F[130°C])
63H : High pressure switch 63HS : High pressure sensor LEV : Linear expansion
valve SV1 : Solenoid valve TH4 : Thermistor
Defective operation of stop valve (not fully open) Clogged or broken pipe
Malfunction or locked outdoor fan motor Short-cycle of outdoor unit Dirt of
outdoor heat exchanger Remote controller transmitting error caused by noise
interference Contact failure of the outdoor controller board connector
Defective outdoor controller board Short-cycle of indoor unit Decreased
airflow, clogged filter, or dirt on indoor unit. Malfunction or locked indoor
fan motor Decreased airflow caused by defective inspection of outdoor
temperature thermistor (It detects lower temperature than actual temperature.)
Indoor LEV performance failure Malfunction of fan driving circuit SV1
performance failure Defective high pressure sensor Defective high pressure
sensor input circuit on outdoor controller board Defective
Thermistor
Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis
Remedy
Turn the power OFF of indoor/outdoor
unit, Fresh Master, Lossnay and remote
controller simultaneously for 10 minutes, then turn the power back ON.
Yes
Is the check code <6607> No ACK error
displayed?
No
There is abnormality in circuit board or wiring connection on the outdoor unit.
Is 5201 displayed when restarted?
No (1302)
Is the outdoor stop valve (liquid/ gas) fully open?
Yes
Yes (5201)
No
Does the outdoor fan rotate while the operation?
No
Yes
Does the indoor fan rotate while the operation?
No
Yes
Refer to the diagnosis of check code 5201.
Open the stop valve (liquid/gas) fully.
Check the outdoor fan motor. Refer to “How to check the parts” on the outdoor
unit service manual.
Check the indoor fan motor. Refer to “How to check the parts” on the indoor
unit service manual.
Is the indoor unit short-cycled? No (no short-cycle)
Yes (short-cycled)
Continue to the next page.
OCH811B
60
Solve the short-cycle.
Check code
1302
High pressure trouble or thermal protector trouble
(UE)
Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Chart 2 of 4
Diagnosis
Remedy
Continued from the previous page.
Is the indoor unit filter clogged?
Yes (Clogged filter)
No (No clog)
Is there dirt on the indoor heat exchanger?
No (no dirt)
Yes (dirty)
Is the outdoor unit short-cycled?
Yes (short-cycled)
No (no short-cycle)
Is there dirt on the outdoor heat exchanger?
No (no dirt)
Yes (dirty)
Are the pipes clogged or broken?
Yes
No
Disconnect the TH7 wiring and check the resistance.
Clean the filter. Wash the indoor heat exchanger.
Solve the short cycle. Wash the outdoor heat exchanger.
Correct defective pipes.
Continue to the next page.
OCH811B
61
Check code
1302
High pressure trouble or thermal protector trouble
(UE)
Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Chart 3 of 4
Diagnosis
Remedy
Continued from the previous page.
Is the resistance detected?
No
Yes
Disconnect the indoor LEV wiring to check the resistance.
Replace the TH7.
Is the resistance detected?
No
Yes
Check the voltage() and appearance of the indoor controller board.
For the voltage, refer to “8-8.HOW TO CHECK COMPONENTS”.
Is the voltage normal?
Is it free from any trace of over-
No
heating or burning?
Yes
Check the resistance of SV1.
Replace the indoor LEV. Replace the indoor controller board.
Continue to the next page.
OCH811B
62
Check code
1302
High pressure trouble or thermal protector trouble
(UE)
Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Chart 4 of 4
Diagnosis
Remedy
Continued from the previous page.
Is the resistance detected?
No
Replace the SV1.
Yes
Is the connector for outdoor
controller board 63H disconnected or
Yes
loose?
Reconnect the connector or connect it tightly.
No
Check the 63HS voltage.
Is the voltage(*) detected?
No
Yes
Disconnect the TH4 wiring and check the resistance
Is the resistance detected?
No
Yes
Is there refrigerant leak?
Yes
No
*For the voltage, refer to “8-8.HOW TO CHECK COMPONENTS”.
Replace the 63HS.
Replace the TH4. Repair the refrigerant leakage. Replace the outdoor
controller board.
OCH811B
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Check code
1500 (U7)
Superheat due to low discharge temperature trouble
Chart 1 of 2
Abnormal points and detection methods
Causes and checkpoints
If the discharge superheat is continuously detected -27°F -15 or less
for 5 minutes even though the indoor LEV has minimum open pulse after the
compressor starts operating for 10 minutes.
LEV : Linear expansion valve TH4 : Thermistor
Disconnection or loose connection of TH4 Defective holder of TH4 Disconnection of LEV coil Disconnection of LEV connector LEV performance failure
*At this temperature, conditions for the abnormality detection will not be satisfied if no abnormality is detected on either TH4 or 63HS.
Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis
Remedy
Is the TH4 wiring disconnected?
Yes
(disconnected)
No (connected properly)
Connect the wiring properly.
Check the resistance of TH4.
32°F [0°C]·······700k 50°F [10°C]·····410k 68°F [20°C]·····250k 86°F [30°C]·····160k 104°F [40°C]·····104k
Is the resistance normal?
No
Yes
Check the connector .c.ontact and wiring of the indoor LEV.
Is there any abnormality
such as half-disconnection or
Yes
breakage?
No
Disconnect the indoor LEV wiring to check the resistance.
Continue to the next page.
Replace the TH4.
Connect the connector properly, or replace the LEV.
OCH811B
64
Check code
1500 Superheat due to low discharge temperature trouble
(U7)
Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Chart 2 of 2
Diagnosis
Remedy
Continued from the previous page.
Is the resistance detected?
No
Yes
Check the voltage and appearance of the indoor controller board.
Replace the indoor LEV.
Is the voltage normal?
Is it free from any trace of over-
No
heating or burning?
Yes
Check the 63HS voltage.
Replace the indoor controller board.
Is the voltage(*) detected?
No
Replace the 63HS.
Yes
*For the voltage, refer to “8-8.HOW TO CHECK COMPONENTS”.
Replace the outdoor controller board.
OCH811B
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Check code
1501 (U2)
Refrigerant shortage trouble
Chart 1 of 2
Abnormal points and detection methods
Causes and checkpoints
(1) When all of the following conditions have been satisfied for 15
consecutive minutes:
1. The compressor is operating in HEAT mode. 2. Discharge super heat is 176°F
[80 ] or more. 3. Difference between TH7 and the TH3 applies to the formula of
(TH7-TH3 < 9°F [5 ]). 4.The saturation temperature converted from a high
pressure sensor
detects below 95°F [35 ].
Defective operation of stop valve (not fully open) Defective thermistor Defective outdoor controller board Indoor LEV performance failure Gas leakage or shortage Defective 63HS
(2) When all of the following conditions have been satisfied: 1.The compressor
is in operation.
2.When cooling, discharge superheat is 144°F [80 ] or more, and the saturation
temperature converted from a high pressure sensor is over
-40°F [-40 ]. When heating, discharge superheat is 162°F [90 ] or more.
TH3 : Thermistor
Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis
Remedy
Is the outdoor stop valve (ball valve) fully open?
No
Yes
Open the stop valve (ball valve) fully.
Is there refrigerant leak? No (no leaking)
Yes (leaking)
Is 5104 displayed when restarted?
No (1501)
Check relevant thermistor wirings and connector contacts of the controller
boards.
Yes (5104)
Repair the refrigerant leak. Refer to the diagnosis of check code 5104.
Is there any abnormality on
connectors such as disconnection,
Yes
half-disconnection or breakage?
No
Disconnect the thermistor wiring and check the resistance.
Continue to the next page.
OCH811B
66
Connect the connector properly (Repair or replace it in the case of breakage).
Check code
1501 (U2)
Refrigerant shortage trouble
Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis
Remedy
Continued from the previous page.
Chart 2 of 2
Is the resistance detected?
No
Yes
Check the 63HS voltage.
Replace the thermistor.
Is the voltage detected?
No
Yes
Check the voltage and appearance of the outdoor controller board.
Yes
Is the voltage normal value?
Is it free from any trace of over-
No
heating or burning?
Yes
Disconnect the indoor LEV wiring and check the resistance.
Replace the 63HS. Replace the outdoor controller board.
Is the resistance detected?
No
Yes
OCH811B
67
Replace the indoor LEV. Replace the indoor controller board.
Check code
1501 (U2)
Closed valve in cooling mode
Abnormal points and detection methods
Causes and checkpoints
If stop valve is closed during cooling operation.
When both of the following temperature conditions have been satisfied for 20
minutes or more during cooling operation.
1. TH22j – TH21j -3.6°F [-2°C] 2. TH23j – TH21j -3.6°F [-2°C] Note: For
indoor unit, the abnormality is detected if an operating unit satisfies the
condition.
Outdoor liquid/gas valve is closed. Mulfunction of outdoor LEV (LEV-A)
(blockage)
TH21: Indoor intake temperature thermistor TH22: Indoor liquid pipe
temperature thermistor TH23: Indoor gas pipe temperature thermistor LEV:
Linear expansion valve
Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis
Remedy
Is the outdoor stop valve No
(liquid/gas) fully open? Yes
Disconnect the outdoor LEV wiring to check the resistance.
Open the outdoor stop valve (liquid/gas) fully.
Is the resistance detected?
No
Yes v
Replace the outdoor LEV. Replace the outdoor controller board.
OCH811B
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Check code
1503 (P6)
Freeze protection of Branch box or Indoor unit
Abnormal points and detection methods
Causes and checkpoints
The purpose of the check code is to prevent indoor unit from freezing or dew
condensation which is caused when a refrigerant keeps flowing into the unit in
STOP.
When all of the following conditions are satisfied: 1. The compressor is
operating in COOL mode. 2. 15 minutes have passed after the startup of the
compressor, or the change in the number of operating indoor units is made
(including a change by turning thermo-ON/OFF). 3. After the condition 2 above
is satisfied, the thermistor of indoor unit in STOP detects TH22j 23°F [-5°C]
for 5 consecutive minutes.
1 Wrong piping connection between indoor unit and branch box
2 Miswiring between indoor unit and branch box 3 Miswiring of LEV in branch
box
Malfunction of LEV in branch box
LEV: Linear expansion valve TH22: Indoor liquid pipe temperature thermistor
Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis
Remedy
Check the port which the piping and
wiring between the indoor unit and
branch box is connected.
No
Is the piping and wiring connected to the
same port?
Connect the piping and wiring to the same port.
Yes
Check the port which the LEV wiring of
branch box is connected. Is the wiring connected to the same port as
No
the corresponding branch box?
Yes
Connect the LEV wiring to the intended port properly.
Check the LEV wiring of indoor unit that is not via branch box is connected properly.
No
v
Yes
Disconnect the LEV wiring of branch box or indoor unit to check the resistance.
Connect the LEV wiring properly.
Is the resistance detected? Yes
OCH811B
No
69
Replace the LEV coil.
Replace the LEV assy in branch box or the LEV of indoor unit that is not via
branch box.
Check code
1508 (EF)
4-way valve trouble in heating mode
Abnormal points and detection methods
Causes and checkpoints
If 4-way valve does not operate during heating operation.
When any of the following temperature conditions is satisfied for 3 minutes or
more during heating operation when the outdoor temperature is -4°F [-20°C] or
more:
1. TH22j – TH21j -18°F [-10°C] 2. TH23j – TH21j -18°F [-10°C] 3. TH22j 37.4°F
[3°C] 4. TH23j 37.4°F [3°C] Note: For indoor unit, the abnormality is detected
if an operating unit satisfies the condition.
4-way valve failure Disconnection or failure of 4-way valve coil Clogged drain
pipe Disconnection or loose connection of connectors Malfunction of input
circuit on outdoor multi controller circuit board Defective outdoor power
circuit board
TH21: Indoor intake temperature thermistor (RT11 or TH1) TH22: Indoor liquid
pipe temperature thermistor (RT13 or TH2) TH23: Indoor gas pipe temperature
thermistor (TH-A to E)
Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis
Remedy
Is the connector for outdoor multi
controller circuit board or 4-way
Yes
valve coil disconnected or loose?
No
Disconnect the connector for outdoor multi controller circuit board or 4-way valve coil to check the resistance.
Reconnect the connector or connect it tightly.
Is the resistance detected?
No
Please refer to “8-7. HOW TO Yes CHECK PARTS” for ohm values.
Check the voltage and appearance of the outdoor multi controller circuit board.
Is the detected voltage normal?
Is it free from any trace of over-
No
heating or burning?
Yes
Replace the 4-way valve coil.
Replace the outdoor multi controller circuit board.
Replace the 4-way valve.
OCH811B
70
Check code
3121
Out-of-range outside air temperature
Abnormal points and det
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