MITSUBISHI ELECTRIC MUFZ-KW Series Outdoor unit Hyper Heating console User Manual
- June 4, 2024
- Mitsubishi Electric
Table of Contents
MUFZ-KW Series Outdoor unit Hyper Heating console
OUTDOOR UNIT
SERVICE MANUAL
HFC
utilized
R32
No. OBH895
Models
MUFZ-KW25VGHZ – E1 MUFZ-KW35VGHZ – E1 MUFZ-KW50VGHZ – E1 MUFZ-KW60VGHZ – E1
MUFZ-KW25VGHZ MUFZ-KW35VGHZ
Indoor unit service manual MFZ-KW·VG Series (OBH894)
CONTENTS
1. TECHNICAL CHANGES ······························ 2 2. SERVICING
PRECAUTIONS FOR UNITS
USING REFRIGERANT R32························· 3 3. PART NAMES AND FUNCTIONS
·················· 5 4. SPECIFICATION ········································
6 5. NOISE CRITERIA CURVES·························· 9 6. OUTLINES AND
DIMENSIONS ··················· 10 7. WIRING DIAGRAM
··································· 12 8. REFRIGERANT SYSTEM DIAGRAM
··········· 13 9. PERFORMANCE CURVES ························ 15 10. ACTUATOR
CONTROL ····························· 29 11. SERVICE FUNCTIONS
······························ 30 12. TROUBLESHOOTING
······························· 31 13. DISASSEMBLY
INSTRUCTIONS················· 52
PARTS CATALOG (OBB895)
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.
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 and pull the power plug. Discharge the capacitor before
the work involving the electric parts.
WARNING
· When the refrigeration circuit has a leak, do not execute pump down with the
compressor.
· When pumping down the refrigerant, stop the compressor before disconnecting
the refrigerant pipes. The compressor may burst if air etc. get into it.
· 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 TECHNICAL CHANGES
MUFZ-KW25VGHZ – E1 MUFZ-KW35VGHZ – E1 MUFZ-KW50VGHZ – E1 MUFZ-KW60VGHZ – E1
1. New model
2
OBH895
2 SERVICING PRECAUTIONS FOR UNITS USING REFRIGERANT R32
Servicing precautions for units using refrigerant R32 WARNING
This unit uses a flammable refrigerant. If refrigerant leaks and comes in
contact with fire or heating part, it will create harmful gas and there is
risk of fire.
Do not use means to accelerate the defrosting process or to clean, other than
those recommended by the manufacturer. The appliance shall be stored in a room
without continuously operating ignition sources (for example: open flames, an
operating gas appliance or an operating electric heater.) Do not pierce or
burn. Be aware that refrigerants may not contain an odor. Pipe-work shall be
protected from physical damage. The installation of pipe-work shall be kept to
a minimum. Compliance with national gas regulations shall be observed. Keep
any required ventilation openings clear of obstruction. Servicing shall be
performed only as recommended by the manufacturer. The appliance shall be
stored so as to prevent mechanical damage from occurring.
Basic work procedures are the same as those for conventional units using
refrigerant R410A. However, pay careful attention to the following points. 1.
Information on servicing
(1) Checks on the Area Prior to beginning work on systems containing flammable
refrigerants, safety checks are necessary to ensure that the risk of ignition
is minimized.
(2) Work Procedure Work shall be undertaken under a controlled procedure so as
to minimize the risk of a flammable gas or vapor being present while the work
is being performed.
(3) General Work Area All maintenance staff and others working in the local
area shall be instructed on the nature of work being carried out. Work in
confined spaces shall be avoided. The area around the workspace shall be
sectioned off. Ensure that the conditions within the area have been made safe
by control of flammable material.
(4) Checking for Presence of Refrigerant The area shall be checked with an
appropriate refrigerant detector prior to and during work, to ensure the
technician is aware of potentially toxic or flammable atmospheres. Ensure that
the leak detection equipment being used is suitable for use with all
applicable refrigerants, i.e. non-sparking, adequately sealed or intrinsically
safe.
(5) Presence of Fire Extinguisher If any hot work is to be conducted on the
refrigeration equipment or any associated parts, appropriate fire
extinguishing equipment shall be available to hand. Have a dry powder or CO2
fire extinguisher adjacent to the charging area.
(6) No Ignition Sources No person carrying out work in relation to a
refrigeration system which involves exposing any pipe work shall use any
sources of ignition in such a manner that it may lead to the risk of fire or
explosion. All possible ignition sources, including cigarette smoking, should
be kept sufficiently far away from the site of installation, repairing,
removing and disposal, during which refrigerant can possibly be released to
the surrounding space. Prior to work taking place, the area around the
equipment is to be surveyed to make sure that there are no flammable hazards
or ignition risks. “No Smoking” signs shall be displayed.
(7) Ventilated Area Ensure that the area is in the open or that it is
adequately ventilated before breaking into the system or conducting any hot
work. A degree of ventilation shall continue during the period that the work
is carried out. The ventilation should safely disperse any released
refrigerant and preferably expel it externally into the atmosphere.
(8) Checks on the Refrigeration Equipment Where electrical components are
being changed, they shall be fit for the purpose and to the correct
specification. At all times the manufacturer’s maintenance and service
guidelines shall be followed. If in doubt, consult the manufacturer’s
technical department for assistance. The following checks shall be applied to
installations using flammable refrigerants: · The charge size is in accordance
with the room size within which the refrigerant containing parts are
installed. · The ventilation machinery and outlets are operating adequately
and are not obstructed. · If an indirect refrigerating circuit is being used,
the secondary circuit shall be checked for the presence of refrigerant. ·
Marking to the equipment continues to be visible and legible. Markings and
signs that are illegible shall be corrected. · Refrigeration pipe or
components are installed in a position where they are unlikely to be exposed
to any substance which may corrode refrigerant containing components, unless
the components are constructed of materials which are inherently resistant to
being corroded or are suitably protected against being corroded.
(9) Checks on Electrical Devices Repair and maintenance to electrical
components shall include initial safety checks and component inspection
procedures. If a fault exists that could compromise safety, then no electrical
supply shall be connected to the circuit until it is satisfactorily dealt
with. If the fault cannot be corrected immediately but it is necessary to
continue operation, an adequate temporary solution shall be used. This shall
be reported to the owner of the equipment so all parties are advised. Initial
safety checks shall include that: · capacitors are discharged: this shall be
done in a safe manner to avoid possibility of sparking; · no live electrical
components and wiring are exposed while charging, recovering or purging the
system; · there is continuity of earth bonding
2. Repairs to Sealed Components (1) During repairs to sealed components, all
electrical supplies shall be disconnected from the equipment being worked upon
prior to any removal of sealed covers, etc. If it is absolutely necessary to
have an electrical supply to equipment during servicing, then a permanently
operating form of leak detection shall be located at the most critical point
to warn of a potentially hazardous situation. (2) Particular attention shall
be paid to the following to ensure that by working on electrical components,
the casing is not altered in such a way that the level of protection is
affected. This shall include damage to cables, excessive number of
connections, terminals not made to original specification, damage to seals,
incorrect fitting of glands, etc. Ensure that the apparatus is mounted
securely. Ensure that seals or sealing materials have not degraded to the
point that they no longer serve the purpose of preventing the ingress of
flammable atmospheres. Replacement parts shall be in accordance with the
manufacturer’s specifications.
3. Repair to intrinsically Safe Components Do not apply any permanent
inductive or capacitance loads to the circuit without ensuring that this will
not exceed the permissible voltage and current permitted for the equipment in
use. Intrinsically safe components are the only types that can be worked on
while live in the presence of a flammable atmosphere. The test apparatus shall
be at the correct rating. Replace components only with parts specified by the
manufacturer. Other parts may result in the ignition of refrigerant in the
atmosphere from a leak.
4. Cabling Check that cabling will not be subject to wear, corrosion,
excessive pressure, vibration, sharp edges or any other adverse environmental
effects. The check shall also take into account the effects of aging or
continual vibration from sources such as compressors or fans.
3
OBH895
5. Detection of Flammable Refrigerants Under no circumstances shall potential
sources of ignition be used in the searching for or detection of refrigerant
leaks. A halide torch (or any other detector using a naked flame) shall not be
used.
6. Leak Detection Methods Electronic leak detectors may be used to detect
refrigerant leaks but, in the case of flammable refrigerants, the sensitivity
may not be adequate, or may need re-calibration. (Detection equipment shall be
calibrated in a refrigerant-free area.) Ensure that the detector is not a
potential source of ignition and is suitable for the refrigerant used. Leak
detection equipment shall be set at a percentage of the LFL of the refrigerant
and shall be calibrated to the refrigerant employed, and the appropriate
percentage of gas (25 % maximum) is confirmed. Leak detection fluids are
suitable for use with most refrigerants but the use of detergents containing
chlorine shall be avoided as the chlorine may react with the refrigerant and
corrode the copper pipe-work. If a leak is suspected, all naked flames shall
be removed/extinguished. If a leakage of refrigerant is found which requires
brazing, all of the refrigerant shall be recovered from the system, or
isolated (by means of shut off valves) in a part of the system remote from the
leak. For appliances containing flammable refrigerants, oxygen free nitrogen
(OFN) shall then be purged through the system both before and during the
brazing process.
7. Removal and Evacuation When breaking into the refrigerant circuit to make
repairs – or for any other purpose conventional procedures shall be used.
However, for flammable refrigerants it is important that best practice is
followed since flammability is a consideration. The following procedure shall
be adhered to: remove refrigerant purge the circuit with inert gas evacuate
purge again with inert gas open the circuit by cutting or brazing. The
refrigerant charge shall be recovered into the correct recovery cylinders. For
appliances containing flammable refrigerants, the system shall be “flushed”
with OFN to render the unit safe. This process may need to be repeated several
times. Compressed air or oxygen shall not be used for purging refrigerant
systems. For appliances containing flammable refrigerants, flushing shall be
achieved by breaking the vacuum in the system with OFN and continuing to fill
until the working pressure is achieved, then venting to atmosphere, and
finally pulling down to a vacuum. This process shall be repeated until no
refrigerant is within the system. When the final OFN charge is used, the
system shall be vented down to atmospheric pressure to enable work to take
place. This operation is absolutely vital if brazing operations on the pipe-
work are to take place. Ensure that the outlet for the vacuum pump is not
close to any ignition sources and that ventilation is available.
8. Charging Procedures In addition to conventional charging procedures, the
following requirements shall be followed: Ensure that contamination of
different refrigerants does not occur when using charging equipment. Hoses or
lines shall be as short as possible to minimize the amount of refrigerant
contained in them. Cylinders shall be kept upright. Ensure that the
refrigeration system is earthed prior to charging the system with refrigerant.
Label the system when charging is complete (if not already). Extreme care
shall be taken not to overfill the refrigeration system. Prior to recharging
the system, it shall be pressure-tested with the appropriate purging gas. The
system shall be leak-tested on completion of charging but prior to
commissioning. A follow up leak test shall be carried out prior to leaving the
site.
9. Decommissioning Before carrying out this procedure, it is essential that
the technician is completely familiar with the equipment and all its detail.
It is recommended good practice that all refrigerants are recovered safely.
Prior to the task being carried out, an oil and refrigerant sample shall be
taken in case analysis is required prior to re-use of reclaimed refrigerant.
It is essential that electrical power is available before the task is
commenced. (1) Become familiar with the equipment and its operation. (2)
Isolate system electrically. (3) Before attempting the procedure, ensure that:
mechanical handling equipment is available, if required, for handling
refrigerant cylinders; all personal protective equipment is available and
being used correctly; the recovery process is supervised at all times by a
competent person; recovery equipment and cylinders conform to the appropriate
standards. (4) Pump down refrigerant system, if possible. (5) If a vacuum is
not possible, make a manifold so that refrigerant can be removed from various
parts of the system. (6) Make sure that cylinder is situated on the scales
before recovery takes place. (7) Start the recovery machine and operate in
accordance with manufacturer’s instructions. (8) Do not overfill cylinders.
(no more than 80 % volume liquid charge). (9) Do not exceed the maximum
working pressure of the cylinder, even temporarily. (10) When the cylinders
have been filled correctly and the process completed, make sure that the
cylinders and the equipment are removed from site promptly and all isolation
valves on the equipment are closed off. (11) Recovered refrigerant shall not
be charged into another refrigeration system unless it has been cleaned and
checked.
10. Labeling Equipment shall be labeled stating that it has been de-
commissioned and emptied of refrigerant. The label shall be dated and signed.
For appliances containing flammable refrigerants, ensure that there are labels
on the equipment stating the equipment contains flammable refrigerant.
11. Recovery When removing refrigerant from a system, either for servicing or
decommissioning, it is recommended good practice that all refrigerants are
removed safely. When transferring refrigerant into cylinders, ensure that only
appropriate refrigerant recovery cylinders are employed. Ensure that the
correct number of cylinders for holding the total system charge are available.
All cylinders to be used are designated for the recovered refrigerant and
labeled for that refrigerant (i.e. special cylinders for the recovery of
refrigerant). Cylinders shall be complete with pressure-relief valve and
associated shut-off valves in good working order. Empty recovery cylinders are
evacuated and, if possible, cooled before recovery occurs. The recovery
equipment shall be in good working order with a set of instructions concerning
the equipment that is at hand and shall be suitable for the recovery of all
appropriate refrigerants including, when applicable, flammable refrigerants.
In addition, a set of calibrated weighing scales shall be available and in
good working order. Hoses shall be complete with leak-free disconnect
couplings and in good condition. Before using the recovery machine, check that
it is in satisfactory working order, has been properly maintained and that any
associated electrical components are sealed to prevent ignition in the event
of a refrigerant release. Consult manufacturer if in doubt. The recovered
refrigerant shall be returned to the refrigerant supplier in the correct
recovery cylinder, and the relevant waste transfer note arranged. Do not mix
refrigerants in recovery units and especially not in cylinders. If compressors
or compressor oils are to be removed, ensure that they have been evacuated to
an acceptable level to make certain that flammable refrigerant does not remain
within the lubricant. The evacuation process shall be carried out prior to
returning the compressor to the suppliers. Only electric heating to the
compressor body shall be employed to accelerate this process. When oil is
drained from a system, it shall be carried out safely.
4
OBH895
3 PART NAMES AND FUNCTIONS
MUFZ-KW25VGHZ MUFZ-KW35VGHZ
Air inlet (Back and side)
Piping Air outlet Drain hose Drain outlet
MUFZ-KW50VGHZ MUFZ-KW60VGHZ
Air inlet (Back and side)
Piping Drain hose
Air outlet Drain outlet
5
OBH895
4 SPECIFICATION
Outdoor model
MUFZ-KW25VGHZ
MUFZ-KW35VGHZ
Power supply
Single phase, 230 V, 50 Hz
Capacity Rated (Min.-Max.)
Cooling kW
Heating
2.5 (0.7 – 3.6) 3.4 (0.2 – 5.1)
3.5 (0.7 – 4.3) 4.3 (0.2 – 6.0)
Breaker Capacity
A
10
12
Cooling
570
Power input *1 (Set)
W
Heating
830
900 1,210
Electrical data
Cooling
3.0
4.3
Running current *1 (Set)
A
Heating
3.9
5.4
Cooling
82
91
Power factor *1 (Set)
%
Heating
92
97
Starting current *1 (Set)
A
3.9
5.4
Coefficient of performance
Cooling
4.38
3.88
(COP) *1 (Set)
Heating
4.09
3.55
Model
SVB130FBBMT
Output
W
900
Compressor
Cooling
2.57
3.87
Current *1
A
Heating
3.46
4.96
Refrigeration oil (Model)
L
0.35 (FW68S)
Model
RC0J50-NC
Fan motor
Cooling
0.25
0.25
Current *1
A
Heating
0.22
0.22
Dimensions W × H × D
mm
800 × 550 × 285
Weight
kg
35
Dehumidification
Cooling
L/h
0.6
1.4
Cooling
High Low
1,962 984
1,962 984
Airflow
High
m3/h
1,962
1,962
Heating
Medium
1,638
1,638
Special remarks
Low
1,356
1,356
Sound level *1
Cooling Heating
dB(A)
47 46
47 47
High
900
900
Cooling
Low
490
490
Fan speed
High
rpm
900
900
Heating
Medium
760
760
Low
640
640
Fan speed regulator
3
Refrigerant filling capacity (R32)
kg
1.00
NOTE: Test conditions are based on ISO 5151. Cooling: Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C Outdoor Dry-bulb temperature 35°C Wet-bulb temperature 24°C Heating: Indoor Dry-bulb temperature 20°C Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C *1 Measured under rated operating frequency.
6
OBH895
Outdoor model
MUFZ-KW50VGHZ
MUFZ-KW60VGHZ
Power supply
Single phase, 230 V, 50 Hz
Capacity Rated (Min. – Max.)
Cooling kW
Heating
5.0 (1.0 – 5.8) 6.0 (1.2 – 8.4)
6.1 (1.0 – 6.5) 6.5 (1.2 – 9.0)
Breaker Capacity
A
16
16
Power input *1 (Set)
Cooling W
Heating
1,360 1,600
1,730 1,880
Electrical data
Cooling
6.2
7.7
Running current *1 (Set)
A
Heating
7.1
8.3
Cooling
95
97
Power factor *1 (Set)
%
Heating
97
98
Starting current *1 (Set)
A
7.1
8.3
Coefficient of performance
Cooling
3.67
3.52
(COP) *1 (Set)
Heating
3.75
3.45
Model
SVB172FCKMT
Output
W
1,200
Compressor
Cooling
5.25
6.32
Current *1
A
Heating
5.89
6.94
Refrigeration oil (Model)
L
0.40(FW68S)
Model
RC0J60-BC
Fan motor
Cooling
0.68
0.83
Current *1
A
Heating
0.74
0.84
Dimensions W × H × D
mm
840 × 880 × 330
Weight
kg
54
54
Dehumidification
Cooling
L/h
2.2
2.3
Cooling
High Low
2,628 1,716
2,928 1,716
Airflow
High
m3/h
3,078
3,078
Heating
Medium
2,778
3,078
Special remarks
Low
2,280
2,280
Cooling
50
52
Sound level *1
dB(A)
Heating
54
56
High
760
820
Cooling
Low
450
450
Fan speed
High
rpm
860
860
Heating
Medium
800
860
Low
650
650
Fan speed regulator
3
Refrigerant filling capacity (R32)
kg
1.30
NOTE: Test conditions are based on ISO 5151. Cooling: Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C Outdoor Dry-bulb temperature 35°C Wet-bulb temperature 24°C Heating: Indoor Dry-bulb temperature 20°C Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C *1 Measured under rated operating frequency.
7
OBH895
Specifications and rated conditions of main electric parts
Model Item
Smoothing capacitor
(C61, C62, C63)
Diode module
(DB61) (DB65)
(F701, F801, F901)
Fuse
(F61)
(F62)
Defrost heater
(H)
Power module
(IC700) (IC932)
Expansion valve coil
(LEV)
Reactor
Switching power transistor
Circuit protection
(L61) (Q821) (PTC64, PTC65)
Terminal block
(TB1)
(X63)
Relay
(X64) (X66)
(X69)
R.V. coil
(21S4)
Heater protector
(26H)
MUFZ-KW25VGHZ MUFZ-KW35VGHZ
600 µF/ 620 µF 420 V 15 A 600 V 25A 600V
T3.15AL250V 25 A 250 V 15 A 250 V 230 V 60 W 20A 600V 5 A 600 V 12 V DC 23 mH
30A/37A 600V
33 5 P 3 A 250 V 20 A 250 V 3 A 250 V 10 A 230 V 220-240 V AC Open 45°C
Item Smoothing capacitor Fuse Switching power transistor Defrost heater
Power module
Expansion valve coil Reactor Diode Diode module Circuit protection Terminal
block
Relay
R.V. coil Heater protector
Model
(CB1, CB2, CB3)
(F601, F880, F901)
(Q3A, Q3B)
(H) (IC932) (IC700)
(LEV) (L)
(D3A, D3B) (DB41A, DB41B) (PTC64, PTC65)
(TB1, TB2) (X64) (X65) (X69)
(X601) (X602) (21S4)
(26H)
OBH895
MUFZ-KW50VGHZ MUFZ-KW60VGHZ
560 µF 450 V T3.15AL250V
21 A 650 V
230V 120 W 5 A 600 V 20 A 600 V 12 V DC 282 µH 20 A 600 V 20 A 600 V 33 3 P 20
A 250 V 20 A 250 V 10 A 250 V 3 A 250 V 3 A 250 V
220-240 V AC Open 45°C
8
5 NOISE CRITERIA CURVES
MUFZ-KW25VGHZ
FUNCTION SPL(dB(A)) LINE
COOLING
47
HEATING
46
90
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
NC-10
NC-20
10 63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
MUFZ-KW50VGHZ
FUNCTION SPL(dB(A)) LINE
COOLING
50
HEATING
54
90
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
NC-10
NC-20
10 63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
MUFZ-KW35VGHZ
FUNCTION SPL(dB(A)) LINE
COOLING
47
HEATING
47
90
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
NC-10
NC-20
10 63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
MUFZ-KW60VGHZ
FUNCTION SPL(dB(A)) LINE
COOLING
52
HEATING
56
90
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
NC-10
NC-20
10 63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
Test conditions Cooling: Dry-bulb temperature 35°C Heating: Dry-bulb
temperature 7°C Wet-bulb temperature 6°C
OUTDOOR UNIT
1 m MICROPHONE
9
OBH895
6 OUTLINES AND DIMENSIONS
MUFZ-KW25VGHZ MUFZ-KW35VGHZ
Unit: mm
10
OBH895
360 Clear *1
MUFZ-KW50VGHZ MUFZ-KW60VGHZ
REQUIRED SPACE
*1. 500 mm or more when front and sides of the unit are clear
417.5 Air in
Air in
Drain hole 42 40
100 mm or more
330 50
Unit: mm
100 mm or more
Air out
175
500
840 109
2-holes 10 21 81
5o0r0mmomre *2
350 mm or more
*2. When any 2 sides of left, right and rear of the unit are clear
Service panel
Liquid refrigerant pipe joint Refrigerant pipe (flared) Ø 6.35
880 452
35 44
164.5 99.5
Gas refrigerant pipe joint
Refrigerant pipe (flared)
Ø 12.7 195
11
OBH895
7 WIRING DIAGRAM
MUFZ-KW25VGHZ MUFZ-KW35VGHZ
MUFZ-KW50VGHZ MUFZ-KW60VGHZ
12
OBH895
8 REFRIGERANT SYSTEM DIAGRAM
MUFZ-KW25VGHZ MUFZ-KW35VGHZ
Unit: mm
Refrigerant pipe ø9.52 (with heat insulator)
Muffler
Stop valve
Flared connection
4-way valve
Discharge temperature thermistor RT62
Muffler Compressor
Outdoor heat exchanger
Defrost thermistor RT61
Outdoor heat exchanger temperature thermistor RT68 Ambient temperature thermistor RT65
Flared connection
Stop valve
Capillary tube LEV
(with strainer) ø4.0×ø2.4×240
Refrigerant pipe ø6.35 (with heat insulator)
Strainer #100
MUFZ-KW50VGHZ MUFZ-KW60VGHZ
Refrigerant pipe ø12.7 (with heat insulator)
4-way valve
Strainer #100
R.V. coil heating ON cooling OFF
Refrigerant flow in cooling Refrigerant flow in heating
Flared connection
Stop valve
Discharge temperature thermistor RT62
Defrost thermistor RT61
Outdoor heat exchanger
Ambient temperature thermistor RT65
Compressor
Flared connection
Strainer Capillary tube LEV Strainer
100 ø4.0×ø2.4×100
100
Stop valve
Muffler
Outdoor heat exchanger temperature thermistor RT68
R.V. coil heating ON cooling OFF
Refrigerant pipe ø6.35 (with heat insulator)
Refrigerant flow in cooling Refrigerant flow in heating
13
OBH895
MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE
Model
MUFZ-KW25VGHZ MUFZ-KW35VGHZ
Refrigerant piping: m
Max. Length A
Max. Height difference B
20
12
Piping size O.D: mm
Gas
Liquid
9.52
6.35
MUFZ-KW50VGHZ MUFZ-KW60VGHZ
30
15
12.7
6.35
Indoor unit
Max. Height difference
B
Max. Length A
Outdoor unit
ADDITIONAL REFRIGERANT CHARGE (R32: g)
Model
Outdoor unit
Refrigerant piping length (one way)
precharged 7 m 8 m 9 m 10 m 11 m 12 m 13 m 14 m 15 m 16 m 17 m 18 m 19 m 20 m
MUFZ-KW25VGHZ MUFZ-KW35VGHZ
1,000
0 20 40 60 80 100 120 140 160 180 200 220 240 260
Calculation: X g = 20 g/m × (Refrigerant piping length(m) – 7)
Model
Outdoor unit
Refrigerant piping length (one way)
precharged 7 m
8 m
9 m
10 m
15 m
20 m
MUFZ-KW50VGHZ MUFZ-KW60VGHZ
1,300
0
20
40
60
160
260
Calculation: X g = 20 g/m × (Refrigerant piping length (m) 7)
25 m 360
30 m 460
14
OBH895
9 PERFORMANCE CURVES
MUFZ-KW25VGHZ MUFZ-KW35VGHZ MUFZ-KW50VGHZ MUFZ-KW60VGHZ
The standard specifications apply only to the operation of the air conditioner under normal conditions. Since operating condi-
tions vary according to the areas where these units are installed, the following information has been provided to clarify the
operating characteristics of the air conditioner under the conditions indicated by the performance curve.
(1) GUARANTEED VOLTAGE
198 ~ 264V, 50 Hz
(2) AIRFLOW
Airflow should be set at MAX.
(3) MAIN READINGS
(1) Indoor intake air wet-bulb temperature: (2) Indoor outlet air wet-bulb temperature: (3) Outdoor intake air dry-bulb temperature:
} °C [WB] °C [WB] °C [DB]
Cooling
(4) Total input:
W
(5) Indoor intake air dry-bulb temperature: (6) Outdoor intake air wet-bulb temperature: (7) Total input:
} °C [DB] °C [WB]
Heating
W
Indoor air wet and dry bulb temperature difference on the left side of the following chart shows the difference between the
indoor intake air wet and dry bulb temperature and the indoor outlet air wet and dry bulb temperature for your reference at
service.
(4) GUARANTEED OUTDOOR TEMPERATURE
COOLING (DB/WB): -10/ ~ 46/
HEATING (DB/WB): -25/ ~ 24/18
How to measure the indoor air wet and dry bulb temperature difference 1. Attach at least 2 sets of wet and dry bulb thermometers to the indoor air intake as shown in the figure, and at least 2 sets of wet and dry bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air speed is high. 2. Attach at least 2 sets of wet and dry bulb thermometers to the outdoor air intake. Cover the thermometers to prevent direct rays of the sun. 3. Check that the air filter is cleaned. 4. Open windows and doors of room. 5. Press the emergency operation switch once (twice) to start the EMERGENCY COOL (HEAT) MODE. 6. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature. 7. 10 minutes later, measure temperature again and check that the temperature does not change.
INDOOR UNIT
OUTDOOR UNIT
Wet and dry bulb thermometers
FRONT VIEW
Wet and dry bulb thermometers
BACK VIEW
15
OBH895
Indoor air Wet-bulb temperature difference (°C)
MUFZ-KW25VGHZ
9-1. CAPACITY AND INPUT CURVES
8.5 12.9 14.6 12.1 7.9 11.8 13.4 11.1 7.2 10.8 12.2 10.1 6.6 9.8 11.0 9.2 6.0 8.8 9.9 8.3 5.4 7.9 8.9 7.4 4.8 7.0 7.8 6.6
Capacity correction factors
Cooling capacity (at Rated frequency)
1.5
1.4
Indoor intake air Wet-bulb temperature( )
1.3
1.2
26
1.1 24
1.0
0.9 -10 -5 0
22 20 18
5 10 15 20 25 30 35 40 45
Outdoor intake air Dry-bulb temperature(°C)
MUFZ-KW60VGHZ
MUFZ-KW50VGHZ
MUFZ-KW35VGHZ
Input correction factors
1.3 1.2 1.1 1.0 0.9 0.8
-10
Total input (Cooling : at Rated frequency)
26
24
22 20
18
Indoor intake air Wet-bulb temperature( )
-5 0 5 10 15 20 25 30 35 40 45
Outdoor intake air Dry-bulb temperature (°C)
22.9 29.0 21.2 26.8 19.4 24.5 17.6 22.3 15.9 20.1 14.1 17.8 12.3 15.6 10.6
13.4
8.8 11.1 7.1 8.9
28.0 29.1 25.9 26.9 23.7 24.6 21.6 22.4 19.4 20.2 17.2 17.9 15.1 15.7 12.9
13.4 10.8 11.2
8.6 9.0
1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4
-25
Heating capacity (at Rated frequency)
Indoor intake air Dry-bulb temperature ( )
-20
-15
-10
-5
0
5
10
Outdoor intake air Wet-bulb temperature (°C)
15 20 26
15
Indoor air Dry-bulb temperature difference (°C)
MUFZ-KW25VGHZ MUFZ-KW35VGHZ MUFZ-KW50VGHZ MUFZ-KW60VGHZ
Capacity correction factor
Input correction factor
Total input (Heating : at Rated frequency) 1.3
1.2
26
1.1 1.0 0.9 0.8 0.7
Indoor intake air Dry-bulb temperature ( )
20 15
0.6
0.5
0.4
-25
-20
-15
-10
-5
0
5
10
15
Outdoor intake air Wet-bulb temperature (°C)
NOTE: The above broken lines are for the heating operation without any frost
and defrost operation.
16
OBH895
9-2. CAPACITY AND INPUT CORRECTION BY OPERATIONAL FREQUENCY OF COMPRESSOR
MUFZ-KW25VGHZ
Correction of Cooling capacity 1.5
Correction of Cooling input 3.0
Correction of Heating capacity 1.5
Correction of Heating input 3.0
Input correction factors
Capacity correction factors
Input correction factors
Capacity correction factors
1.0
2.0
1.0
2.0
0.5
1.0
0.5
1.0
0.0
0
50
100
The operational frequency of compressor (Hz)
MUFZ-KW35VGHZ
Correction of Cooling capacity 1.5
0.0
0
50
100
The operational frequency of compressor (Hz)
Correction of Cooling input 3.0
0.0
0
50
100
The operational frequency of compressor (Hz)
Correction of Heating capacity 1.5
0.0
0
50
100
The operational frequency
of compressor (Hz)
Correction of Heating input 3.0
Input correction factors
Capacity correction factors
Input correction factors
Capacity correction factors
1.0
2.0
1.0
2.0
0.5
1.0
0.5
1.0
0.0
0
50
100
The operational frequency of compressor (Hz)
0.0
0
50
100
The operational frequency of compressor (Hz)
MUFZ-KW50VGHZ
Correction of Cooling capacity 1.5
Correction of Cooling input 3.0
0.0
0
50
100
The operational frequency of compressor (Hz)
1.5 Correction of Heating capacity
0.0
0
50
100
The operational frequency
of compressor (Hz)
Correction of Heating input 3.0
Input correction factors
Capacity correction factors
Input correction factors
Capacity correction factors
1.0
2.0
1.0
2.0
0.5
1.0
0.5
1.0
0.0
0
50
100
The operational frequency of compressor (Hz)
MUFZ-KW60VGHZ
0.0
0
50
100
The operational frequency of compressor (Hz)
1.5 Correction of Cooling capacity 3.0 Correction of Cooling input
0.0
0
50
100
The operational frequency of compressor (Hz)
1.5 Correction of Heating capacity
0.0
0
50
100
The operational frequency of compressor (Hz)
3.0 Correction of Heating input
Input correction factors
Capacity correction factors
Input correction factors
Capacity correction factors
1.0
2.0
1.0
2.0
0.5
1.0
0.5
1.0
0.0 0
0.0
50
100
0
50
100
The operational frequency of compressor (Hz)
The operational frequency of compressor (Hz)
0.0
0
50
100
The operational frequency of compressor (Hz)
0.0
0
50
100
The operational frequency of compressor (Hz)
9-3. HOW TO OPERATE FIXED-FREQUENCY OPERATION
9-4. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT
COOL operation
Dry-bulb temperature (°C)
Both indoor and outdoor unit are under the same temperature/
20
humidity condition.
25
Operation: Test run operation (Refer to 9-3.)
30
Relative humidity (%) 50 60 70
Outdoor low pressure
MUFZ-KW25VGHZ
(kgf/cm2 [Gauge])(MPa [Gauge])
18.0
1.8
MUFZ-KW35VGHZ
(kgf/cm2 [Gauge])(MPa [Gauge])
15.0
1.5
1.6 16.0
13.0
1.3
14.2
1.4
11.0
1.1
12.0
1.2
9.0
0.9
10.0
1.0 15
20
25
30
35
7.0
50 60 70
Ambient temperature(°C)
Ambient humidity(%)
0.7
15 20 25 30 35 50 60 70
Ambient temperature(°C)
Ambient humidity(%)
MUFZ-KW50VGHZ
(kgf/cm2 [Gauge])(MPa [Gauge])
15.0
1.5
MUFZ-KW60VGHZ
(kgf/cm2 [Gauge])(MPa [Gauge])
15.0
1.5
1.3 13.0
1.3 13.0
11.0
1.1
11.0
1.1
9.0
0.9
9.0
0.9
7.0
0.7 15 20 25 30 35
7.0
0.7 15 20 25 30 35
50 60 70
50 60 70
Ambient temperature(°C)
Ambient temperature(°C)
Ambient humidity(%)
Ambient humidity(%)
NOTE: The unit of pressure has been changed to MPa on the international system of units (SI unit system) The conversion factor is: 1 (MPa [Gauge]) = 10.2 (kgf/cm2 [Gauge])
Outdoor current (A)
Outdoor current (A)
Outdoor unit current MUFZ-KW25VGHZ
3.8
3.5
3.2
2.9
2.6
2.3 15 20 25 30 35 50 60 70 Ambient temperature(°C) Ambient humidity(%)
MUFZ-KW50VGHZ
7.0
6.5
6.0
5.5
5.0
4.5 15 20 25 30 35 50 60 70 Ambient temperature(°C) Ambient humidity(%)
OBH895
Outdoor current (A)
Outdoor current (A)
MUFZ-KW35VGHZ
5.0
4.6
4.2
3.8
3.4
3.0 15 20 25 30 35 50 60 70 Ambient temperature(°C) Ambient humidity(%)
MUFZ-KW60VGHZ
9.0
8.4
7.8
7.2
6.6
6.0 15 20 25 30 35 50 60 70 Ambient temperature(°C) Ambient humidity(%)
18
HEAT operation
Condition:
Indoor
Dry bulb temperature (°C) 20.0 2
Wet bulb temperature (°C) 14.5 1
Operation: Test run operation (Refer to 9-3.)
Outdoor 7 15 20.0 6 12 14.5
Outdoor current (A)
Outdoor current (A)
Outdoor unit current MUFZ-KW25VGHZ
6.2
5.8
5.4
5.0
4.6
4.2 0 5 10 15 20 25 Ambient temperature (°C)
MUFZ-KW50VGHZ
8.5
8.0
7.5
7.0
6.5
6.0 0 5 10 15 20 25 Ambient temperature (°C)
Outdoor current (A)
Outdoor current (A)
MUFZ-KW35VGHZ
6.2 5.8 5.4 5.0 4.6 4.2
0 5 10 15 20 25 Ambient temperature (°C)
MUFZ-KW60VGHZ
8.0 7.5 7.0 6.5 6.0 5.50 5 10 15 20 25
Ambient temperature (°C)
19
OBH895
PERFORMANCE DATA COOL operation at Rated frequency
MUFZ-KW25VGHZ
CAPACITY: 2.5 kW
SHF: 0.84
INPUT: 570 W
OUTDOOR DB (°C)
INDOOR INDOOR DB (°C) WB (°C)
21
25
27
Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q
21
18 2.94 1.94 0.66 456 2.81 1.86 0.66 479 2.70 1.78 0.66 502 2.60
21
20 3.06 1.65 0.54 479 2.94 1.59 0.54 507 2.85 1.54 0.54 519 2.75
22
18 2.94 2.06 0.70 456 2.81 1.97 0.70 479 2.70 1.89 0.70 502 2.60
22
20 3.06 1.78 0.58 479 2.94 1.70 0.58 507 2.85 1.65 0.58 519 2.75
22
22 3.19 1.47 0.46 496 3.08 1.41 0.46 527 3.00 1.38 0.46 542 2.88
23
18 2.94 2.17 0.74 456 2.81 2.08 0.74 479 2.70 2.00 0.74 502 2.60
23
20 3.06 1.90 0.62 479 2.94 1.82 0.62 507 2.85 1.77 0.62 519 2.75
23
22 3.19 1.59 0.50 496 3.08 1.54 0.50 527 3.00 1.50 0.50 542 2.88
24
18 2.94 2.29 0.78 456 2.81 2.19 0.78 479 2.70 2.11 0.78 502 2.60
24
20 3.06 2.02 0.66 479 2.94 1.94 0.66 507 2.85 1.88 0.66 519 2.75
24
22 3.19 1.72 0.54 496 3.08 1.66 0.54 527 3.00 1.62 0.54 542 2.88
24
24 3.35 1.41 0.42 519 3.23 1.35 0.42 547 3.15 1.32 0.42 564 3.05
25
18 2.94 2.41 0.82 456 2.81 2.31 0.82 479 2.70 2.21 0.82 502 2.60
25
20 3.06 2.14 0.70 479 2.94 2.06 0.70 507 2.85 2.00 0.70 519 2.75
25
22 3.19 1.85 0.58 496 3.08 1.78 0.58 527 3.00 1.74 0.58 542 2.88
25
24 3.35 1.54 0.46 519 3.23 1.48 0.46 547 3.15 1.45 0.46 564 3.05
26
18 2.94 2.53 0.86 456 2.81 2.42 0.86 479 2.70 2.32 0.86 502 2.60
26
20 3.06 2.27 0.74 479 2.94 2.17 0.74 507 2.85 2.11 0.74 519 2.75
26
22 3.19 1.98 0.62 496 3.08 1.91 0.62 527 3.00 1.86 0.62 542 2.88
26
24 3.35 1.68 0.50 519 3.23 1.61 0.50 547 3.15 1.58 0.50 564 3.05
26
26 3.45 1.31 0.38 547 3.35 1.27 0.38 576 3.30 1.25 0.38 593 3.20
27
18 2.94 2.64 0.90 456 2.81 2.53 0.90 479 2.70 2.43 0.90 502 2.60
27
20 3.06 2.39 0.78 479 2.94 2.29 0.78 507 2.85 2.22 0.78 519 2.75
27
22 3.19 2.10 0.66 496 3.08 2.03 0.66 527 3.00 1.98 0.66 542 2.88
27
24 3.35 1.81 0.54 519 3.23 1.74 0.54 547 3.15 1.70 0.54 564 3.05
27
26 3.45 1.45 0.42 547 3.35 1.41 0.42 576 3.30 1.39 0.42 593 3.20
28
18 2.94 2.76 0.94 456 2.81 2.64 0.94 479 2.70 2.54 0.94 502 2.60
28
20 3.06 2.51 0.82 479 2.94 2.41 0.82 507 2.85 2.34 0.82 519 2.75
28
22 3.19 2.23 0.70 496 3.08 2.15 0.70 527 3.00 2.10 0.70 542 2.88
28
24 3.35 1.94 0.58 519 3.23 1.87 0.58 547 3.15 1.83 0.58 564 3.05
28
26 3.45 1.59 0.46 547 3.35 1.54 0.46 576 3.30 1.52 0.46 593 3.20
29
18 2.94 2.88 0.98 456 2.81 2.76 0.98 479 2.70 2.65 0.98 502 2.60
29
20 3.06 2.63 0.86 479 2.94 2.53 0.86 507 2.85 2.45 0.86 519 2.75
29
22 3.19 2.36 0.74 496 3.08 2.28 0.74 527 3.00 2.22 0.74 542 2.88
29
24 3.35 2.08 0.62 519 3.23 2.00 0.62 547 3.15 1.95 0.62 564 3.05
29
26 3.45 1.73 0.50 547 3.35 1.68 0.50 576 3.30 1.65 0.50 593 3.20
30
18 2.94 2.94 1.00 456 2.81 2.81 1.00 479 2.70 2.70 1.00 502 2.60
30
20 3.06 2.76 0.90 479 2.94 2.64 0.90 507 2.85 2.57 0.90 519 2.75
30
22 3.19 2.49 0.78 496 3.08 2.40 0.78 527 3.00 2.34 0.78 542 2.88
30
24 3.35 2.21 0.66 519 3.23 2.13 0.66 547 3.15 2.08 0.66 564 3.05
30
26 3.45 1.86 0.54 547 3.35 1.81 0.54 576 3.30 1.78 0.54 593 3.20
31
18 2.94 2.94 1.00 456 2.81 2.81 1.00 479 2.70 2.70 1.00 502 2.60
31
20 3.06 2.88 0.94 479 2.94 2.76 0.94 507 2.85 2.68 0.94 519 2.75
31
22 3.19 2.61 0.82 496 3.08 2.52 0.82 527 3.00 2.46 0.82 542 2.88
31
24 3.35 2.35 0.70 519 3.23 2.26 0.70 547 3.15 2.21 0.70 564 3.05
31
26 3.45 2.00 0.58 547 3.35 1.94 0.58 576 3.30 1.91 0.58 593 3.20
32
18 2.94 2.94 1.00 456 2.81 2.81 1.00 479 2.70 2.70 1.00 502 2.60
32
20 3.06 3.00 0.98 479 2.94 2.88 0.98 507 2.85 2.79 0.98 519 2.75
32
22 3.19 2.74 0.86 496 3.08 2.64 0.86 527 3.00 2.58 0.86 542 2.88
32
24 3.35 2.48 0.74 519 3.23 2.39 0.74 547 3.15 2.33 0.74 564 3.05
32
26 3.45 2.14 0.62 547 3.35 2.08 0.62 576 3.30 2.05 0.62 593 3.20
NOTE Q : Total capacity (kW)
SHF : Sensible heat factor DB : Dry-bulb temperature
SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature
30 SHC SHF 1.72 0.66 1.49 0.54 1.82 0.70 1.60 0.58 1.32 0.46 1.92 0.74 1.71 0.62 1.44 0.50 2.03 0.78 1.82 0.66 1.55 0.54 1.28 0.42 2.13 0.82 1.93 0.70 1.67 0.58 1.40 0.46 2.24 0.86 2.04 0.74 1.78 0.62 1.53 0.50 1.22 0.38 2.34 0.90 2.15 0.78 1.90 0.66 1.65 0.54 1.34 0.42 2.44 0.94 2.26 0.82 2.01 0.70 1.77 0.58 1.47 0.46 2.55 0.98 2.37 0.86 2.13 0.74 1.89 0.62 1.60 0.50 2.60 1.00 2.48 0.90 2.24 0.78 2.01 0.66 1.73 0.54 2.60 1.00 2.59 0.94 2.36 0.82 2.14 0.70 1.86 0.58 2.60 1.00 2.70 0.98 2.47 0.86 2.26 0.74 1.98 0.62
INPUT 524 542 524 542 564 524 542 564 524 542 564 593 524 542 564 593 524 542 564 593 610 524 542 564 593 610 524 542 564 593 610 524 542 564 593 610 524 542 564 593 610 524 542 564 593 610 524 542 564 593 610
20
OBH895
PERFORMANCE DATA COOL operation at Rated frequency
MUFZ-KW25VGHZ
CAPACITY: 2.5 kW
SHF: 0.84
INPUT: 570 W
OUTDOOR DB (°C)
INDOOR INDOOR DB (°C) WB (°C)
35
40
46
Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT
21
18 2.45 1.62 0.66 559 2.25 1.49 0.66 593 2.08 1.37 0.66 616
21
20 2.58 1.39 0.54 581 2.40 1.30 0.54 610 2.23 1.20 0.54 644
22
18 2.45 1.72 0.70 559 2.25 1.58 0.70 593 2.08 1.45 0.70 616
22
20 2.58 1.49 0.58 581 2.40 1.39 0.58 610 2.23 1.29 0.58 644
22
22 2.73 1.25 0.46 604 2.55 1.17 0.46 638 2.38 1.09 0.46 661
23
18 2.45 1.81 0.74 559 2.25 1.67 0.74 593 2.08 1.54 0.74 616
23
20 2.58 1.60 0.62 581 2.40 1.49 0.62 610 2.23 1.38 0.62 644
23
22 2.73 1.36 0.50 604 2.55 1.28 0.50 638 2.38 1.19 0.50 661
24
18 2.45 1.91 0.78 559 2.25 1.76 0.78 593 2.08 1.62 0.78 616
24
20 2.58 1.70 0.66 581 2.40 1.58 0.66 610 2.23 1.47 0.66 644
24
22 2.73 1.47 0.54 604 2.55 1.38 0.54 638 2.38 1.28 0.54 661
24
24 2.88 1.21 0.42 627 2.70 1.13 0.42 656 2.55 1.07 0.42 684
25
18 2.45 2.01 0.82 559 2.25 1.85 0.82 593 2.08 1.70 0.82 616
25
20 2.58 1.80 0.70 581 2.40 1.68 0.70 610 2.23 1.56 0.70 644
25
22 2.73 1.58 0.58 604 2.55 1.48 0.58 638 2.38 1.38 0.58 661
25
24 2.88 1.32 0.46 627 2.70 1.24 0.46 656 2.55 1.17 0.46 684
26
18 2.45 2.11 0.86 559 2.25 1.94 0.86 593 2.08 1.78 0.86 616
26
20 2.58 1.91 0.74 581 2.40 1.78 0.74 610 2.23 1.65 0.74 644
26
22 2.73 1.69 0.62 604 2.55 1.58 0.62 638 2.38 1.47 0.62 661
26
24 2.88 1.44 0.50 627 2.70 1.35 0.50 656 2.55 1.28 0.50 684
26
26 3.03 1.15 0.38 650 2.85 1.08 0.38 678 2.68 1.02 0.38 707
27
18 2.45 2.21 0.90 559 2.25 2.03 0.90 593 2.08 1.87 0.90 616
27
20 2.58 2.01 0.78 581 2.40 1.87 0.78 610 2.23 1.74 0.78 644
27
22 2.73 1.80 0.66 604 2.55 1.68 0.66 638 2.38 1.57 0.66 661
27
24 2.88 1.55 0.54 627 2.70 1.46 0.54 656 2.55 1.38 0.54 684
27
26 3.03 1.27 0.42 650 2.85 1.20 0.42 678 2.68 1.12 0.42 707
28
18 2.45 2.30 0.94 559 2.25 2.12 0.94 593 2.08 1.95 0.94 616
28
20 2.58 2.11 0.82 581 2.40 1.97 0.82 610 2.23 1.82 0.82 644
28
22 2.73 1.91 0.70 604 2.55 1.79 0.70 638 2.38 1.66 0.70 661
28
24 2.88 1.67 0.58 627 2.70 1.57 0.58 656 2.55 1.48 0.58 684
28
26 3.03 1.39 0.46 650 2.85 1.31 0.46 678 2.68 1.23 0.46 707
29
18 2.45 2.40 0.98 559 2.25 2.21 0.98 593 2.08 2.03 0.98 616
29
20 2.58 2.21 0.86 581 2.40 2.06 0.86 610 2.23 1.91 0.86 644
29
22 2.73 2.02 0.74 604 2.55 1.89 0.74 638 2.38 1.76 0.74 661
29
24 2.88 1.78 0.62 627 2.70 1.67 0.62 656 2.55 1.58 0.62 684
29
26 3.03 1.51 0.50 650 2.85 1.43 0.50 678 2.68 1.34 0.50 707
30
18 2.45 2.45 1.00 559 2.25 2.25 1.00 593 2.08 2.08 1.00 616
30
20 2.58 2.32 0.90 581 2.40 2.16 0.90 610 2.23 2.00 0.90 644
30
22 2.73 2.13 0.78 604 2.55 1.99 0.78 638 2.38 1.85 0.78 661
30
24 2.88 1.90 0.66 627 2.70 1.78 0.66 656 2.55 1.68 0.66 684
30
26 3.03 1.63 0.54 650 2.85 1.54 0.54 678 2.68 1.44 0.54 707
31
18 2.45 2.45 1.00 559 2.25 2.25 1.00 593 2.08 2.08 1.00 616
31
20 2.58 2.42 0.94 581 2.40 2.26 0.94 610 2.23 2.09 0.94 644
31
22 2.73 2.23 0.82 604 2.55 2.09 0.82 638 2.38 1.95 0.82 661
31
24 2.88 2.01 0.70 627 2.70 1.89 0.70 656 2.55 1.79 0.70 684
31
26 3.03 1.75 0.58 650 2.85 1.65 0.58 678 2.68 1.55 0.58 707
32
18 2.45 2.45 1.00 559 2.25 2.25 1.00 593 2.08 2.08 1.00 616
32
20 2.58 2.52 0.98 581 2.40 2.35 0.98 610 2.23 2.18 0.98 644
32
22 2.73 2.34 0.86 604 2.55 2.19 0.86 638 2.38 2.04 0.86 661
32
24 2.88 2.13 0.74 627 2.70 2.00 0.74 656 2.55 1.89 0.74 684
32
26 3.03 1.88 0.62 650 2.85 1.77 0.62 678 2.68 1.66 0.62 707
NOTE Q : Total capacity (kW)
SHF : Sensible heat factor DB : Dry-bulb temperature
SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature
21
OBH895
PERFORMANCE DATA COOL operation at Rated frequency
MUFZ-KW35VGHZ
CAPACITY: 3.5 kW
SHF: 0.72
INPUT: 900 W
OUTDOOR DB (°C)
INDOOR INDOOR DB (°C) WB (°C)
21
25
27
Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q
21
18 4.11 2.22 0.54 720 3.94 2.13 0.54 756 3.78 2.04 0.54 792 3.64
21
20 4.29 1.80 0.42 756 4.11 1.73 0.42 801 3.99 1.68 0.42 819 3.85
22
18 4.11 2.39 0.58 720 3.94 2.28 0.58 756 3.78 2.19 0.58 792 3.64
22
20 4.29 1.97 0.46 756 4.11 1.89 0.46 801 3.99 1.84 0.46 819 3.85
22
22 4.46 1.52 0.34 783 4.31 1.46 0.34 833 4.20 1.43 0.34 855 4.03
23
18 4.11 2.55 0.62 720 3.94 2.44 0.62 756 3.78 2.34 0.62 792 3.64
23
20 4.29 2.14 0.50 756 4.11 2.06 0.50 801 3.99 1.99 0.50 819 3.85
23
22 4.46 1.70 0.38 783 4.31 1.64 0.38 833 4.20 1.60 0.38 855 4.03
24
18 4.11 2.71 0.66 720 3.94 2.60 0.66 756 3.78 2.49 0.66 792 3.64
24
20 4.29 2.32 0.54 756 4.11 2.22 0.54 801 3.99 2.15 0.54 819 3.85
24
22 4.46 1.87 0.42 783 4.31 1.81 0.42 833 4.20 1.76 0.42 855 4.03
24
24 4.69 1.41 0.30 819 4.52 1.35 0.30 864 4.41 1.32 0.30 891 4.27
25
18 4.11 2.88 0.70 720 3.94 2.76 0.70 756 3.78 2.65 0.70 792 3.64
25
20 4.29 2.49 0.58 756 4.11 2.39 0.58 801 3.99 2.31 0.58 819 3.85
25
22 4.46 2.05 0.46 783 4.31 1.98 0.46 833 4.20 1.93 0.46 855 4.03
25
24 4.69 1.59 0.34 819 4.52 1.53 0.34 864 4.41 1.50 0.34 891 4.27
26
18 4.11 3.04 0.74 720 3.94 2.91 0.74 756 3.78 2.80 0.74 792 3.64
26
20 4.29 2.66 0.62 756 4.11 2.55 0.62 801 3.99 2.47 0.62 819 3.85
26
22 4.46 2.23 0.50 783 4.31 2.15 0.50 833 4.20 2.10 0.50 855 4.03
26
24 4.69 1.78 0.38 819 4.52 1.72 0.38 864 4.41 1.68 0.38 891 4.27
26
26 4.83 1.26 0.26 864 4.69 1.22 0.26 909 4.62 1.20 0.26 936 4.48
27
18 4.11 3.21 0.78 720 3.94 3.07 0.78 756 3.78 2.95 0.78 792 3.64
27
20 4.29 2.83 0.66 756 4.11 2.71 0.66 801 3.99 2.63 0.66 819 3.85
27
22 4.46 2.41 0.54 783 4.31 2.32 0.54 833 4.20 2.27 0.54 855 4.03
27
24 4.69 1.97 0.42 819 4.52 1.90 0.42 864 4.41 1.85 0.42 891 4.27
27
26 4.83 1.45 0.30 864 4.69 1.41 0.30 909 4.62 1.39 0.30 936 4.48
28
18 4.11 3.37 0.82 720 3.94 3.23 0.82 756 3.78 3.10 0.82 792 3.64
28
20 4.29 3.00 0.70 756 4.11 2.88 0.70 801 3.99 2.79 0.70 819 3.85
28
22 4.46 2.59 0.58 783 4.31 2.50 0.58 833 4.20 2.44 0.58 855 4.03
28
24 4.69 2.16 0.46 819 4.52 2.08 0.46 864 4.41 2.03 0.46 891 4.27
28
26 4.83 1.64 0.34 864 4.69 1.59 0.34 909 4.62 1.57 0.34 936 4.48
29
18 4.11 3.54 0.86 720 3.94 3.39 0.86 756 3.78 3.25 0.86 792 3.64
29
20 4.29 3.17 0.74 756 4.11 3.04 0.74 801 3.99 2.95 0.74 819 3.85
29
22 4.46 2.77 0.62 783 4.31 2.67 0.62 833 4.20 2.60 0.62 855 4.03
29
24 4.69 2.34 0.50 819 4.52 2.26 0.50 864 4.41 2.20 0.50 891 4.27
29
26 4.83 1.84 0.38 864 4.69 1.78 0.38 909 4.62 1.76 0.38 936 4.48
30
18 4.11 3.70 0.90 720 3.94 3.54 0.90 756 3.78 3.40 0.90 792 3.64
30
20 4.29 3.34 0.78 756 4.11 3.21 0.78 801 3.99 3.11 0.78 819 3.85
30
22 4.46 2.95 0.66 783 4.31 2.84 0.66 833 4.20 2.77 0.66 855 4.03
30
24 4.69 2.53 0.54 819 4.52 2.44 0.54 864 4.41 2.38 0.54 891 4.27
30
26 4.83 2.03 0.42 864 4.69 1.97 0.42 909 4.62 1.94 0.42 936 4.48
31
18 4.11 3.87 0.94 720 3.94 3.70 0.94 756 3.78 3.55 0.94 792 3.64
31
20 4.29 3.52 0.82 756 4.11 3.37 0.82 801 3.99 3.27 0.82 819 3.85
31
22 4.46 3.12 0.70 783 4.31 3.01 0.70 833 4.20 2.94 0.70 855 4.03
31
24 4.69 2.72 0.58 819 4.52 2.62 0.58 864 4.41 2.56 0.58 891 4.27
31
26 4.83 2.22 0.46 864 4.69 2.16 0.46 909 4.62 2.13 0.46 936 4.48
32
18 4.11 4.03 0.98 720 3.94 3.86 0.98 756 3.78 3.70 0.98 792 3.64
32
20 4.29 3.69 0.86 756 4.11 3.54 0.86 801 3.99 3.43 0.86 819 3.85
32
22 4.46 3.30 0.74 783 4.31 3.19 0.74 833 4.20 3.11 0.74 855 4.03
32
24 4.69 2.91 0.62 819 4.52 2.80 0.62 864 4.41 2.73 0.62 891 4.27
32
26 4.83 2.41 0.50 864 4.69 2.34 0.50 909 4.62 2.31 0.50 936 4.48
NOTE Q : Total capacity (kW)
SHF : Sensible heat factor DB : Dry-bulb temperature
SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature
30 SHC SHF 1.97 0.54 1.62 0.42 2.11 0.58 1.77 0.46 1.37 0.34 2.26 0.62 1.92 0.50 1.53 0.38 2.40 0.66 2.08 0.54 1.69 0.42 1.28 0.30 2.55 0.70 2.23 0.58 1.85 0.46 1.45 0.34 2.69 0.74 2.39 0.62 2.01 0.50 1.62 0.38 1.16 0.26 2.84 0.78 2.54 0.66 2.17 0.54 1.79 0.42 1.34 0.30 2.98 0.82 2.69 0.70 2.33 0.58 1.96 0.46 1.52 0.34 3.13 0.86 2.85 0.74 2.50 0.62 2.13 0.50 1.70 0.38 3.28 0.90 3.00 0.78 2.66 0.66 2.31 0.54 1.88 0.42 3.42 0.94 3.16 0.82 2.82 0.70 2.48 0.58 2.06 0.46 3.57 0.98 3.31 0.86 2.98 0.74 2.65 0.62 2.24 0.50
INPUT 828 855 828 855 891 828 855 891 828 855 891 936 828 855 891 936 828 855 891 936 963 828 855 891 936 963 828 855 891 936 963 828 855 891 936 963 828 855 891 936 963 828 855 891 936 963 828 855 891 936 963
22
OBH895
PERFORMANCE DATA COOL operation at Rated frequency
MUFZ-KW35VGHZ
CAPACITY: 3.5 kW
SHF: 0.72
INPUT: 900 W
OUTDOOR DB (°C)
INDOOR INDOOR DB (°C) WB (°C)
35
40
46
Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT
21
18 3.43 1.85 0.54 882 3.15 1.70 0.54 936 2.91 1.57 0.54 972
21
20 3.61 1.51 0.42 918 3.36 1.41 0.42 963 3.12 1.31 0.42 1017
22
18 3.43 1.99 0.58 882 3.15 1.83 0.58 936 2.91 1.68 0.58 972
22
20 3.61 1.66 0.46 918 3.36 1.55 0.46 963 3.12 1.43 0.46 1017
22
22 3.82 1.30 0.34 954 3.57 1.21 0.34 1008 3.33 1.13 0.34 1044
23
18 3.43 2.13 0.62 882 3.15 1.95 0.62 936 2.91 1.80 0.62 972
23
20 3.61 1.80 0.50 918 3.36 1.68 0.50 963 3.12 1.56 0.50 1017
23
22 3.82 1.45 0.38 954 3.57 1.36 0.38 1008 3.33 1.26 0.38 1044
24
18 3.43 2.26 0.66 882 3.15 2.08 0.66 936 2.91 1.92 0.66 972
24
20 3.61 1.95 0.54 918 3.36 1.81 0.54 963 3.12 1.68 0.54 1017
24
22 3.82 1.60 0.42 954 3.57 1.50 0.42 1008 3.33 1.40 0.42 1044
24
24 4.03 1.21 0.30 990 3.78 1.13 0.30 1035 3.57 1.07 0.30 1080
25
18 3.43 2.40 0.70 882 3.15 2.20 0.70 936 2.91 2.03 0.70 972
25
20 3.61 2.09 0.58 918 3.36 1.95 0.58 963 3.12 1.81 0.58 1017
25
22 3.82 1.75 0.46 954 3.57 1.64 0.46 1008 3.33 1.53 0.46 1044
25
24 4.03 1.37 0.34 990 3.78 1.29 0.34 1035 3.57 1.21 0.34 1080
26
18 3.43 2.54 0.74 882 3.15 2.33 0.74 936 2.91 2.15 0.74 972
26
20 3.61 2.23 0.62 918 3.36 2.08 0.62 963 3.12 1.93 0.62 1017
26
22 3.82 1.91 0.50 954 3.57 1.78 0.50 1008 3.33 1.66 0.50 1044
26
24 4.03 1.53 0.38 990 3.78 1.44 0.38 1035 3.57 1.36 0.38 1080
26
26 4.24 1.10 0.26 1026 3.99 1.04 0.26 1071 3.75 0.97 0.26 1116
27
18 3.43 2.68 0.78 882 3.15 2.46 0.78 936 2.91 2.27 0.78 972
27
20 3.61 2.38 0.66 918 3.36 2.22 0.66 963 3.12 2.06 0.66 1017
27
22 3.82 2.06 0.54 954 3.57 1.93 0.54 1008 3.33 1.80 0.54 1044
27
24 4.03 1.69 0.42 990 3.78 1.59 0.42 1035 3.57 1.50 0.42 1080
27
26 4.24 1.27 0.30 1026 3.99 1.20 0.30 1071 3.75 1.12 0.30 1116
28
18 3.43 2.81 0.82 882 3.15 2.58 0.82 936 2.91 2.38 0.82 972
28
20 3.61 2.52 0.70 918 3.36 2.35 0.70 963 3.12 2.18 0.70 1017
28
22 3.82 2.21 0.58 954 3.57 2.07 0.58 1008 3.33 1.93 0.58 1044
28
24 4.03 1.85 0.46 990 3.78 1.74 0.46 1035 3.57 1.64 0.46 1080
28
26 4.24 1.44 0.34 1026 3.99 1.36 0.34 1071 3.75 1.27 0.34 1116
29
18 3.43 2.95 0.86 882 3.15 2.71 0.86 936 2.91 2.50 0.86 972
29
20 3.61 2.67 0.74 918 3.36 2.49 0.74 963 3.12 2.30 0.74 1017
29
22 3.82 2.37 0.62 954 3.57 2.21 0.62 1008 3.33 2.06 0.62 1044
29
24 4.03 2.01 0.50 990 3.78 1.89 0.50 1035 3.57 1.78 0.50 1080
29
26 4.24 1.61 0.38 1026 3.99 1.52 0.38 1071 3.75 1.42 0.38 1116
30
18 3.43 3.09 0.90 882 3.15 2.83 0.90 936 2.91 2.61 0.90 972
30
20 3.61 2.81 0.78 918 3.36 2.62 0.78 963 3.12 2.43 0.78 1017
30
22 3.82 2.52 0.66 954 3.57 2.36 0.66 1008 3.33 2.19 0.66 1044
30
24 4.03 2.17 0.54 990 3.78 2.04 0.54 1035 3.57 1.93 0.54 1080
30
26 4.24 1.78 0.42 1026 3.99 1.68 0.42 1071 3.75 1.57 0.42 1116
31
18 3.43 3.22 0.94 882 3.15 2.96 0.94 936 2.91 2.73 0.94 972
31
20 3.61 2.96 0.82 918 3.36 2.76 0.82 963 3.12 2.55 0.82 1017
31
22 3.82 2.67 0.70 954 3.57 2.50 0.70 1008 3.33 2.33 0.70 1044
31
24 4.03 2.33 0.58 990 3.78 2.19 0.58 1035 3.57 2.07 0.58 1080
31
26 4.24 1.95 0.46 1026 3.99 1.84 0.46 1071 3.75 1.72 0.46 1116
32
18 3.43 3.36 0.98 882 3.15 3.09 0.98 936 2.91 2.85 0.98 972
32
20 3.61 3.10 0.86 918 3.36 2.89 0.86 963 3.12 2.68 0.86 1017
32
22 3.82 2.82 0.74 954 3.57 2.64 0.74 1008 3.33 2.46 0.74 1044
32
24 4.03 2.50 0.62 990 3.78 2.34 0.62 1035 3.57 2.21 0.62 1080
32
26 4.24 2.12 0.50 1026 3.99 1.99 0.50 1071 3.75 1.87 0.50 1116
NOTE Q : Total capacity (kW)
SHF : Sensible heat factor DB : Dry-bulb temperature
SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature
23
OBH895
PERFORMANCE DATA COOL operation at Rated frequency
MUFZ-KW50VGHZ
CAPACITY: 5.0 kW
SHF: 0.70
INPUT: 1360 W
OUTDOOR DB (°C)
INDOOR INDOOR DB (°C) WB (°C)
21
25
27
Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q
21
18 5.88 3.05 0.52 1088 5.63 2.92 0.52 1142 5.40 2.81 0.52 1197 5.20
21
20 6.13 2.45 0.40 1142 5.88 2.35 0.40 1210 5.70 2.28 0.40 1238 5.50
22
18 5.88 3.29 0.56 1088 5.63 3.15 0.56 1142 5.40 3.02 0.56 1197 5.20
22
20 6.13 2.69 0.44 1142 5.88 2.58 0.44 1210 5.70 2.51 0.44 1238 5.50
22
22 6.38 2.04 0.32 1183 6.15 1.96 0.32 1258 6.00 1.92 0.32 1292 5.75
23
18 5.88 3.52 0.60 1088 5.63 3.37 0.60 1142 5.40 3.24 0.60 1197 5.20
23
20 6.13 2.94 0.48 1142 5.88 2.82 0.48 1210 5.70 2.73 0.48 1238 5.50
23
22 6.38 2.29 0.36 1183 6.15 2.21 0.36 1258 6.00 2.16 0.36 1292 5.75
24
18 5.88 3.76 0.64 1088 5.63 3.60 0.64 1142 5.40 3.45 0.64 1197 5.20
24
20 6.13 3.18 0.52 1142 5.88 3.05 0.52 1210 5.70 2.96 0.52 1238 5.50
24
22 6.38 2.55 0.40 1183 6.15 2.46 0.40 1258 6.00 2.40 0.40 1292 5.75
24
24 6.70 1.87 0.28 1238 6.45 1.80 0.28 1306 6.30 1.76 0.28 1346 6.10
25
18 5.88 3.99 0.68 1088 5.63 3.82 0.68 1142 5.40 3.67 0.68 1197 5.20
25
20 6.13 3.43 0.56 1142 5.88 3.29 0.56 1210 5.70 3.19 0.56 1238 5.50
25
22 6.38 2.80 0.44 1183 6.15 2.70 0.44 1258 6.00 2.64 0.44 1292 5.75
25
24 6.70 2.14 0.32 1238 6.45 2.06 0.32 1306 6.30 2.01 0.32 1346 6.10
26
18 5.88 4.23 0.72 1088 5.63 4.05 0.72 1142 5.40 3.89 0.72 1197 5.20
26
20 6.13 3.67 0.60 1142 5.88 3.52 0.60 1210 5.70 3.42 0.60 1238 5.50
26
22 6.38 3.06 0.48 1183 6.15 2.95 0.48 1258 6.00 2.88 0.48 1292 5.75
26
24 6.70 2.41 0.36 1238 6.45 2.32 0.36 1306 6.30 2.26 0.36 1346 6.10
26
26 6.90 1.65 0.24 1306 6.70 1.60 0.24 1374 6.60 1.58 0.24 1414 6.40
27
18 5.88 4.46 0.76 1088 5.63 4.27 0.76 1142 5.40 4.10 0.76 1197 5.20
27
20 6.13 3.92 0.64 1142 5.88 3.76 0.64 1210 5.70 3.65 0.64 1238 5.50
27
22 6.38 3.31 0.52 1183 6.15 3.19 0.52 1258 6.00 3.12 0.52 1292 5.75
27
24 6.70 2.68 0.40 1238 6.45 2.58 0.40 1306 6.30 2.52 0.40 1346 6.10
27
26 6.90 1.93 0.28 1306 6.70 1.87 0.28 1374 6.60 1.84 0.28 1414 6.40
28
18 5.88 4.70 0.80 1088 5.63 4.50 0.80 1142 5.40 4.32 0.80 1197 5.20
28
20 6.13 4.16 0.68 1142 5.88 3.99 0.68 1210 5.70 3.87 0.68 1238 5.50
28
22 6.38 3.57 0.56 1183 6.15 3.44 0.56 1258 6.00 3.36 0.56 1292 5.75
28
24 6.70 2.94 0.44 1238 6.45 2.83 0.44 1306 6.30 2.77 0.44 1346 6.10
28
26 6.90 2.20 0.32 1306 6.70 2.14 0.32 1374 6.60 2.11 0.32 1414 6.40
29
18 5.88 4.93 0.84 1088 5.63 4.72 0.84 1142 5.40 4.53 0.84 1197 5.20
29
20 6.13 4.41 0.72 1142 5.88 4.23 0.72 1210 5.70 4.10 0.72 1238 5.50
29
22 6.38 3.82 0.60 1183 6.15 3.69 0.60 1258 6.00 3.60 0.60 1292 5.75
29
24 6.70 3.21 0.48 1238 6.45 3.09 0.48 1306 6.30 3.02 0.48 1346 6.10
29
26 6.90 2.48 0.36 1306 6.70 2.41 0.36 1374 6.60 2.37 0.36 1414 6.40
30
18 5.88 5.17 0.88 1088 5.63 4.95 0.88 1142 5.40 4.75 0.88 1197 5.20
30
20 6.13 4.65 0.76 1142 5.88 4.46 0.76 1210 5.70 4.33 0.76 1238 5.50
30
22 6.38 4.08 0.64 1183 6.15 3.93 0.64 1258 6.00 3.84 0.64 1292 5.75
30
24 6.70 3.48 0.52 1238 6.45 3.35 0.52 1306 6.30 3.27 0.52 1346 6.10
30
26 6.90 2.76 0.40 1306 6.70 2.68 0.40 1374 6.60 2.64 0.40 1414 6.40
31
18 5.88 5.40 0.92 1088 5.63 5.17 0.92 1142 5.40 4.97 0.92 1197 5.20
31
20 6.13 4.90 0.80 1142 5.88 4.70 0.80 1210 5.70 4.56 0.80 1238 5.50
31
22 6.38 4.33 0.68 1183 6.15 4.18 0.68 1258 6.00 4.08 0.68 1292 5.75
31
24 6.70 3.75 0.56 1238 6.45 3.61 0.56 1306 6.30 3.52 0.56 1346 6.10
31
26 6.90 3.03 0.44 1306 6.70 2.94 0.44 1374 6.60 2.90 0.44 1414 6.40
32
18 5.88 5.64 0.96 1088 5.63 5.40 0.96 1142 5.40 5.18 0.96 1197 5.20
32
20 6.13 5.14 0.84 1142 5.88 4.93 0.84 1210 5.70 4.79 0.84 1238 5.50
32
22 6.38 4.59 0.72 1183 6.15 4.42 0.72 1258 6.00 4.32 0.72 1292 5.75
32
24 6.70 4.02 0.60 1238 6.45 3.87 0.60 1306 6.30 3.78 0.60 1346 6.10
32
26 6.90 3.31 0.48 1306 6.70 3.21 0.48 1374 6.60 3.16 0.48 1414 6.40
NOTE Q : Total capacity (kW)
SHF : Sensible heat factor DB : Dry-bulb temperature
SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature
30 SHC SHF 2.70 0.52 2.20 0.40 2.91 0.56 2.42 0.44 1.84 0.32 3.12 0.60 2.64 0.48 2.07 0.36 3.33 0.64 2.86 0.52 2.30 0.40 1.71 0.28 3.53 0.68 3.08 0.56 2.53 0.44 1.95 0.32 3.74 0.72 3.30 0.60 2.76 0.48 2.19 0.36 1.53 0.24 3.95 0.76 3.52 0.64 2.99 0.52 2.44 0.40 1.79 0.28 4.16 0.80 3.74 0.68 3.22 0.56 2.68 0.44 2.04 0.32 4.37 0.84 3.96 0.72 3.45 0.60 2.93 0.48 2.30 0.36 4.57 0.88 4.18 0.76 3.68 0.64 3.17 0.52 2.56 0.40 4.78 0.92 4.40 0.80 3.91 0.68 3.41 0.56 2.81 0.44 4.99 0.96 4.62 0.84 4.14 0.72 3.66 0.60 3.07 0.48
INPUT 1251 1292 1251 1292 1346 1251 1292 1346 1251 1292 1346 1414 1251 1292 1346 1414 1251 1292 1346 1414 1455 1251 1292 1346 1414 1455 1251 1292 1346 1414 1455 1251 1292 1346 1414 1455 1251 1292 1346 1414 1455 1251 1292 1346 1414 1455 1251 1292 1346 1414 1455
24
OBH895
PERFORMANCE DATA COOL operation at Rated frequency
MUFZ-KW50VGHZ
CAPACITY: 5.0 kW
SHF: 0.70
INPUT: 1360 W
OUTDOOR DB (°C)
INDOOR INDOOR DB (°C) WB (°C)
35
40
46
Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT
21
18 4.90 2.55 0.52 1333 4.50 2.34 0.52 1414 4.15 2.16 0.52 1469
21
20 5.15 2.06 0.40 1387 4.80 1.92 0.40 1455 4.45 1.78 0.40 1537
22
18 4.90 2.74 0.56 1333 4.50 2.52 0.56 1414 4.15 2.32 0.56 1469
22
20 5.15 2.26 0.44 1387 4.80 2.11 0.44 1455 4.45 1.96 0.44 1537
22
22 5.45 1.74 0.32 1442 5.10 1.63 0.32 1523 4.75 1.52 0.32 1578
23
18 4.90 2.94 0.60 1333 4.50 2.70 0.60 1414 4.15 2.49 0.60 1469
23
20 5.15 2.47 0.48 1387 4.80 2.30 0.48 1455 4.45 2.13 0.48 1537
23
22 5.45 1.96 0.36 1442 5.10 1.83 0.36 1523 4.75 1.71 0.36 1578
24
18 4.90 3.13 0.64 1333 4.50 2.88 0.64 1414 4.15 2.65 0.64 1469
24
20 5.15 2.68 0.52 1387 4.80 2.49 0.52 1455 4.45 2.31 0.52 1537
24
22 5.45 2.18 0.40 1442 5.10 2.04 0.40 1523 4.75 1.90 0.40 1578
24
24 5.75 1.61 0.28 1496 5.40 1.51 0.28 1564 5.10 1.43 0.28 1632
25
18 4.90 3.33 0.68 1333 4.50 3.06 0.68 1414 4.15 2.82 0.68 1469
25
20 5.15 2.88 0.56 1387 4.80 2.69 0.56 1455 4.45 2.49 0.56 1537
25
22 5.45 2.40 0.44 1442 5.10 2.24 0.44 1523 4.75 2.09 0.44 1578
25
24 5.75 1.84 0.32 1496 5.40 1.73 0.32 1564 5.10 1.63 0.32 1632
26
18 4.90 3.53 0.72 1333 4.50 3.24 0.72 1414 4.15 2.99 0.72 1469
26
20 5.15 3.09 0.60 1387 4.80 2.88 0.60 1455 4.45 2.67 0.60 1537
26
22 5.45 2.61 0.48 1442 5.10 2.45 0.48 1523 4.75 2.28 0.48 1578
26
24 5.75 2.07 0.36 1496 5.40 1.94 0.36 1564 5.10 1.83 0.36 1632
26
26 6.05 1.45 0.24 1550 5.70 1.37 0.24 1618 5.35 1.28 0.24 1686
27
18 4.90 3.72 0.76 1333 4.50 3.42 0.76 1414 4.15 3.15 0.76 1469
27
20 5.15 3.29 0.64 1387 4.80 3.07 0.64 1455 4.45 2.85 0.64 1537
27
22 5.45 2.83 0.52 1442 5.10 2.65 0.52 1523 4.75 2.47 0.52 1578
27
24 5.75 2.30 0.40 1496 5.40 2.16 0.40 1564 5.10 2.04 0.40 1632
27
26 6.05 1.69 0.28 1550 5.70 1.59 0.28 1618 5.35 1.50 0.28 1686
28
18 4.90 3.92 0.80 1333 4.50 3.60 0.80 1414 4.15 3.32 0.80 1469
28
20 5.15 3.50 0.68 1387 4.80 3.26 0.68 1455 4.45 3.02 0.68 1537
28
22 5.45 3.05 0.56 1442 5.10 2.85 0.56 1523 4.75 2.66 0.56 1578
28
24 5.75 2.53 0.44 1496 5.40 2.37 0.44 1564 5.10 2.24 0.44 1632
28
26 6.05 1.93 0.32 1550 5.70 1.82 0.32 1618 5.35 1.71 0.32 1686
29
18 4.90 4.11 0.84 1333 4.50 3.78 0.84 1414 4.15 3.48 0.84 1469
29
20 5.15 3.71 0.72 1387 4.80 3.45 0.72 1455 4.45 3.20 0.72 1537
29
22 5.45 3.27 0.60 1442 5.10 3.06 0.60 1523 4.75 2.85 0.60 1578
29
24 5.75 2.76 0.48 1496 5.40 2.59 0.48 1564 5.10 2.45 0.48 1632
29
26 6.05 2.18 0.36 1550 5.70 2.05 0.36 1618 5.35 1.92 0.36 1686
30
18 4.90 4.31 0.88 1333 4.50 3.96 0.88 1414 4.15 3.65 0.88 1469
30
20 5.15 3.91 0.76 1387 4.80 3.65 0.76 1455 4.45 3.38 0.76 1537
30
22 5.45 3.49 0.64 1442 5.10 3.26 0.64 1523 4.75 3.04 0.64 1578
30
24 5.75 2.99 0.52 1496 5.40 2.81 0.52 1564 5.10 2.65 0.52 1632
30
26 6.05 2.42 0.40 1550 5.70 2.28 0.40 1618 5.35 2.14 0.40 1686
31
18 4.90 4.51 0.92 1333 4.50 4.14 0.92 1414 4.15 3.82 0.92 1469
31
20 5.15 4.12 0.80 1387 4.80 3.84 0.80 1455 4.45 3.56 0.80 1537
31
22 5.45 3.70 0.68 1442 5.10 3.47 0.68 1523 4.75 3.23 0.68 1578
31
24 5.75 3.22 0.56 1496 5.40 3.02 0.56 1564 5.10 2.85 0.56 1632
31
26 6.05 2.66 0.44 1550 5.70 2.51 0.44 1618 5.35 2.35 0.44 1686
32
18 4.90 4.70 0.96 1333 4.50 4.32 0.96 1414 4.15 3.98 0.96 1469
32
20 5.15 4.32 0.84 1387 4.80 4.03 0.84 1455 4.45 3.74 0.84 1537
32
22 5.45 3.92 0.72 1442 5.10 3.67 0.72 1523 4.75 3.42 0.72 1578
32
24 5.75 3.45 0.60 1496 5.40 3.24 0.60 1564 5.10 3.06 0.60 1632
32
26 6.05 2.90 0.48 1550 5.70 2.73 0.48 1618 5.35 2.57 0.48 1686
NOTE Q : Total capacity (kW)
SHF : Sensible heat factor DB : Dry-bulb temperature
SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature
25
OBH895
PERFORMANCE DATA COOL operation at Rated frequency
MUFZ-KW60VGHZ
CAPACITY: 6.1 kW
SHF: 0.74
INPUT: 1730 W
OUTDOOR DB (°C)
INDOOR INDOOR DB (°C) WB (°C)
21
25
27
Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT Q
21
18 7.17 4.03 0.56 1384 6.86 3.86 0.56 1453 6.59 3.70 0.56 1522 6.34
21
20 7.47 3.30 0.44 1453 7.17 3.17 0.44 1540 6.95 3.07 0.44 1574 6.71
22
18 7.17 4.32 0.60 1384 6.86 4.13 0.60 1453 6.59 3.97 0.60 1522 6.34
22
20 7.47 3.60 0.48 1453 7.17 3.46 0.48 1540 6.95 3.35 0.48 1574 6.71
22
22 7.78 2.82 0.36 1505 7.50 2.72 0.36 1600 7.32 2.65 0.36 1644 7.02
23
18 7.17 4.60 0.64 1384 6.86 4.41 0.64 1453 6.59 4.23 0.64 1522 6.34
23
20 7.47 3.90 0.52 1453 7.17 3.74 0.52 1540 6.95 3.63 0.52 1574 6.71
23
22 7.78 3.13 0.40 1505 7.50 3.02 0.40 1600 7.32 2.94 0.40 1644 7.02
24
18 7.17 4.89 0.68 1384 6.86 4.68 0.68 1453 6.59 4.49 0.68 1522 6.34
24
20 7.47 4.20 0.56 1453 7.17 4.03 0.56 1540 6.95 3.91 0.56 1574 6.71
24
22 7.78 3.44 0.44 1505 7.50 3.32 0.44 1600 7.32 3.24 0.44 1644 7.02
24
24 8.17 2.63 0.32 1574 7.87 2.53 0.32 1661 7.69 2.48 0.32 1713 7.44
25
18 7.17 5.18 0.72 1384 6.86 4.96 0.72 1453 6.59 4.76 0.72 1522 6.34
25
20 7.47 4.50 0.60 1453 7.17 4.32 0.60 1540 6.95 4.19 0.60 1574 6.71
25
22 7.78 3.75 0.48 1505 7.50 3.62 0.48 1600 7.32 3.53 0.48 1644 7.02
25
24 8.17 2.96 0.36 1574 7.87 2.85 0.36 1661 7.69 2.78 0.36 1713 7.44
26
18 7.17 5.46 0.76 1384 6.86 5.23 0.76 1453 6.59 5.02 0.76 1522 6.34
26
20 7.47 4.80 0.64 1453 7.17 4.60 0.64 1540 6.95 4.47 0.64 1574 6.71
26
22 7.78 4.06 0.52 1505 7.50 3.92 0.52 1600 7.32 3.82 0.52 1644 7.02
26
24 8.17 3.29 0.40 1574 7.87 3.16 0.40 1661 7.69 3.09 0.40 1713 7.44
26
26 8.42 2.37 0.28 1661 8.17 2.31 0.28 1747 8.05 2.27 0.28 1799 7.81
27
18 7.17 5.75 0.80 1384 6.86 5.50 0.80 1453 6.59 5.28 0.80 1522 6.34
27
20 7.47 5.10 0.68 1453 7.17 4.89 0.68 1540 6.95 4.74 0.68 1574 6.71
27
22 7.78 4.37 0.56 1505 7.50 4.22 0.56 1600 7.32 4.11 0.56 1644 7.02
27
24 8.17 3.61 0.44 1574 7.87 3.48 0.44 1661 7.69 3.40 0.44 1713 7.44
27
26 8.42 2.71 0.32 1661 8.17 2.63 0.32 1747 8.05 2.59 0.32 1799 7.81
28
18 7.17 6.04 0.84 1384 6.86 5.78 0.84 1453 6.59 5.55 0.84 1522 6.34
28
20 7.47 5.40 0.72 1453 7.17 5.18 0.72 1540 6.95 5.02 0.72 1574 6.71
28
22 7.78 4.68 0.60 1505 7.50 4.52 0.60 1600 7.32 4.41 0.60 1644 7.02
28
24 8.17 3.94 0.48 1574 7.87 3.79 0.48 1661 7.69 3.71 0.48 1713 7.44
28
26 8.42 3.05 0.36 1661 8.17 2.96 0.36 1747 8.05 2.92 0.36 1799 7.81
29
18 7.17 6.32 0.88 1384 6.86 6.05 0.88 1453 6.59 5.81 0.88 1522 6.34
29
20 7.47 5.69 0.76 1453 7.17 5.46 0.76 1540 6.95 5.30 0.76 1574 6.71
29
22 7.78 4.99 0.64 1505 7.50 4.82 0.64 1600 7.32 4.70 0.64 1644 7.02
29
24 8.17 4.27 0.52 1574 7.87 4.11 0.52 1661 7.69 4.01 0.52 1713 7.44
29
26 8.42 3.38 0.40 1661 8.17 3.29 0.40 1747 8.05 3.24 0.40 1799 7.81
30
18 7.17 6.61 0.92 1384 6.86 6.33 0.92 1453 6.59 6.07 0.92 1522 6.34
30
20 7.47 5.99 0.80 1453 7.17 5.75 0.80 1540 6.95 5.58 0.80 1574 6.71
30
22 7.78 5.31 0.68 1505 7.50 5.12 0.68 1600 7.32 4.99 0.68 1644 7.02
30
24 8.17 4.59 0.56 1574 7.87 4.42 0.56 1661 7.69 4.32 0.56 1713 7.44
30
26 8.42 3.72 0.44 1661 8.17 3.61 0.44 1747 8.05 3.56 0.44 1799 7.81
31
18 7.17 6.90 0.96 1384 6.86 6.60 0.96 1453 6.59 6.34 0.96 1522 6.34
31
20 7.47 6.29 0.84 1453 7.17 6.04 0.84 1540 6.95 5.86 0.84 1574 6.71
31
22 7.78 5.62 0.72 1505 7.50 5.42 0.72 1600 7.32 5.29 0.72 1644 7.02
31
24 8.17 4.92 0.60 1574 7.87 4.74 0.60 1661 7.69 4.63 0.60 1713 7.44
31
26 8.42 4.06 0.48 1661 8.17 3.94 0.48 1747 8.05 3.88 0.48 1799 7.81
32
18 7.17 7.17 1.00 1384 6.86 6.86 1.00 1453 6.59 6.59 1.00 1522 6.34
32
20 7.47 6.59 0.88 1453 7.17 6.32 0.88 1540 6.95 6.13 0.88 1574 6.71
32
22 7.78 5.93 0.76 1505 7.50 5.72 0.76 1600 7.32 5.58 0.76 1644 7.02
32
24 8.17 5.25 0.64 1574 7.87 5.05 0.64 1661 7.69 4.94 0.64 1713 7.44
32
26 8.42 4.40 0.52 1661 8.17 4.27 0.52 1747 8.05 4.20 0.52 1799 7.81
NOTE Q : Total capacity (kW)
SHF : Sensible heat factor DB : Dry-bulb temperature
SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature
30 SHC SHF 3.57 0.56 2.97 0.44 3.82 0.60 3.23 0.48 2.54 0.36 4.07 0.64 3.50 0.52 2.82 0.40 4.33 0.68 3.77 0.56 3.10 0.44 2.40 0.32 4.58 0.72 4.04 0.60 3.38 0.48 2.69 0.36 4.83 0.76 4.31 0.64 3.66 0.52 2.99 0.40 2.20 0.28 5.09 0.80 4.58 0.68 3.94 0.56 3.29 0.44 2.51 0.32 5.34 0.84 4.85 0.72 4.22 0.60 3.59 0.48 2.83 0.36 5.60 0.88 5.11 0.76 4.50 0.64 3.89 0.52 3.14 0.40 5.85 0.92 5.38 0.80 4.78 0.68 4.18 0.56 3.45 0.44 6.10 0.96 5.65 0.84 5.07 0.72 4.48 0.60 3.76 0.48 6.34 1.00 5.92 0.88 5.35 0.76 4.78 0.64 4.08 0.52
INPUT 1592 1644 1592 1644 1713 1592 1644 1713 1592 1644 1713 1799 1592 1644 1713 1799 1592 1644 1713 1799 1851 1592 1644 1713 1799 1851 1592 1644 1713 1799 1851 1592 1644 1713 1799 1851 1592 1644 1713 1799 1851 1592 1644 1713 1799 1851 1592 1644 1713 1799 1851
26
OBH895
PERFORMANCE DATA COOL operation at Rated frequency
MUFZ-KW60VGHZ
CAPACITY: 6.1 kW
SHF: 0.74
INPUT: 1730 W
OUTDOOR DB (°C)
INDOOR INDOOR DB (°C) WB (°C)
35
40
46
Q SHC SHF INPUT Q SHC SHF INPUT Q SHC SHF INPUT
21
18 5.98 3.36 0.56 1695 5.49 3.09 0.56 1799 5.06 2.85 0.56 1868
21
20 6.28 2.78 0.44 1765 5.86 2.59 0.44 1851 5.43 2.40 0.44 1955
22
18 5.98 3.60 0.60 1695 5.49 3.31 0.60 1799 5.06 3.05 0.60 1868
22
20 6.28 3.03 0.48 1765 5.86 2.82 0.48 1851 5.43 2.62 0.48 1955
22
22 6.65 2.41 0.36 1834 6.22 2.25 0.36 1938 5.80 2.10 0.36 2007
23
18 5.98 3.84 0.64 1695 5.49 3.53 0.64 1799 5.06 3.25 0.64 1868
23
20 6.28 3.28 0.52 1765 5.86 3.06 0.52 1851 5.43 2.83 0.52 1955
23
22 6.65 2.67 0.40 1834 6.22 2.50 0.40 1938 5.80 2.33 0.40 2007
24
18 5.98 4.08 0.68 1695 5.49 3.74 0.68 1799 5.06 3.45 0.68 1868
24
20 6.28 3.53 0.56 1765 5.86 3.29 0.56 1851 5.43 3.05 0.56 1955
24
22 6.65 2.94 0.44 1834 6.22 2.75 0.44 1938 5.80 2.56 0.44 2007
24
24 7.02 2.26 0.32 1903 6.59 2.12 0.32 1990 6.22 2.00 0.32 2076
25
18 5.98 4.32 0.72 1695 5.49 3.96 0.72 1799 5.06 3.66 0.72 1868
25
20 6.28 3.78 0.60 1765 5.86 3.53 0.60 1851 5.43 3.27 0.60 1955
25
22 6.65 3.21 0.48 1834 6.22 3.00 0.48 1938 5.80 2.79 0.48 2007
25
24 7.02 2.54 0.36 1903 6.59 2.39 0.36 1990 6.22 2.25 0.36 2076
26
18 5.98 4.56 0.76 1695 5.49 4.18 0.76 1799 5.06 3.86 0.76 1868
26
20 6.28 4.03 0.64 1765 5.86 3.76 0.64 1851 5.43 3.49 0.64 1955
26
22 6.65 3.47 0.52 1834 6.22 3.25 0.52 1938 5.80 3.03 0.52 2007
26
24 7.02 2.82 0.40 1903 6.59 2.65 0.40 1990 6.22 2.50 0.40 2076
26
26 7.38 2.08 0.28 1972 6.95 1.96 0.28 2059 6.53 1.84 0.28 2145
27
18 5.98 4.79 0.80 1695 5.49 4.40 0.80 1799 5.06 4.06 0.80 1868
27
20 6.28 4.29 0.68 1765 5.86 3.99 0.68 1851 5.43 3.70 0.68 1955
27
22 6.65 3.74 0.56 1834 6.22 3.50 0.56 1938 5.80 3.26 0.56 2007
27
24 7.02 3.10 0.44 1903 6.59 2.91 0.44 1990 6.22 2.75 0.44 2076
27
26 7.38 2.38 0.32 1972 6.95 2.24 0.32 2059 6.53 2.10 0.32 2145
28
18 5.98 5.03 0.84 1695 5.49 4.62 0.84 1799 5.06 4.26 0.84 1868
28
20 6.28 4.54 0.72 1765 5.86 4.23 0.72 1851 5.43 3.92 0.72 1955
28
22 6.65 4.00 0.60 1834 6.22 3.75 0.60 1938 5.80 3.49 0.60 2007
28
24 7.02 3.38 0.48 1903 6.59 3.18 0.48 1990 6.22 3.00 0.48 2076
28
26 7.38 2.67 0.36 1972 6.95 2.52 0.36 2059 6.53 2.36 0.36 2145
29
18 5.98 5.27 0.88 1695 5.49 4.84 0.88 1799 5.06 4.47 0.88 1868
29
20 6.28 4.79 0.76 1765 5.86 4.46 0.76 1851 5.43 4.14 0.76 1955
29
22 6.65 4.27 0.64 1834 6.22 4.00 0.64 1938 5.80 3.72 0.64 2007
29
24 7.02 3.66 0.52 1903 6.59 3.44 0.52 1990 6.22 3.25 0.52 2076
29
26 7.38 2.97 0.40 1972 6.95 2.80 0.40 2059 6.53 2.62 0.40 2145
30
18 5.98 5.51 0.92 1695 5.49 5.06 0.92 1799 5.06 4.67 0.92 1868
30
20 6.28 5.04 0.80 1765 5.86 4.70 0.80 1851 5.43 4.35 0.80 1955
30
22 6.65 4.54 0.68 1834 6.22 4.24 0.68 1938 5.80 3.95 0.68 2007
30
24 7.02 3.94 0.56 1903 6.59 3.70 0.56 1990 6.22 3.50 0.56 2076
30
26 7.38 3.26 0.44 1972 6.95 3.07 0.44 2059 6.53 2.89 0.44 2145
31
18 5.98 5.75 0.96 1695 5.49 5.28 0.96 1799 5.06 4.87 0.96 1868
31
20 6.28 5.29 0.84 1765 5.86 4.93 0.84 1851 5.43 4.57 0.84 1955
31
22 6.65 4.80 0.72 1834 6.22 4.49 0.72 1938 5.80 4.18 0.72 2007
31
24 7.02 4.22 0.60 1903 6.59 3.97 0.60 1990 6.22 3.75 0.60 2076
31
26 7.38 3.56 0.48 1972 6.95 3.35 0.48 2059 6.53 3.15 0.48 2145
32
18 5.98 5.98 1.00 1695 5.49 5.49 1.00 1799 5.06 5.06 1.00 1868
32
20 6.28 5.54 0.88 1765 5.86 5.17 0.88 1851 5.43 4.79 0.88 1955
32
22 6.65 5.07 0.76 1834 6.22 4.74 0.76 1938 5.80 4.42 0.76 2007
32
24 7.02 4.50 0.64 1903 6.59 4.23 0.64 1990 6.22 4.00 0.64 2076
32
26 7.38 3.85 0.52 1972 6.95 3.63 0.52 2059 6.53 3.41 0.52 2145
NOTE Q : Total capacity (kW)
SHF : Sensible heat factor DB : Dry-bulb temperature
SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature
27
OBH895
PERFORMANCE DATA HEAT operation at Rated frequency
MUFZ-KW25VGHZ
CAPACITY: 3.4 kW
INPUT: 830 W
INDOOR DB (°C)
15 21 26
OUTDOOR WB (°C)
-25
-20
-15
-10
-5
0
5
10
15
20
Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT
0.85 224 1.29 332 1.70 432 2.14 540 2.58 647 3.03 730 3.47 789 3.91 838 4.32 863 4.76 880
0.78 241 1.19 349 1.60 457 2.04 581 2.45 689 2.89 764 3.30 822 3.74 863 4.15 888 4.57 921
0.54 266 0.95 374 1.39 498 1.84 623 2.28 730 2.69 805 3.13 863 3.57 905 3.98 930 4.42 955
MUFZ-KW35VGHZ
CAPACITY: 4.3 kW
INPUT: 1210 W
INDOOR DB (°C)
15 21 26
OUTDOOR WB (°C)
-25
-20
-15
-10
-5
0
5
10
15
20
Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT
1.08 327 1.63 484 2.15 629 2.71 787 3.27 944 3.83 1065 4.39 1150 4.95 1222 5.46 1258 6.02 1283
0.99 351 1.51 508 2.02 666 2.58 847 3.10 1004 3.66 1113 4.17 1198 4.73 1258 5.25 1295 5.78 1343
0.69 387 1.20 545 1.76 726 2.32 908 2.88 1065 3.40 1174 3.96 1258 4.52 1319 5.03 1355 5.59 1392
MUFZ-KW50VGHZ
CAPACITY: 6.0 kW
INPUT: 1600 W
INDOOR DB (°C)
15 21 26
OUTDOOR WB (°C)
-25
-20
-15
-10
-5
0
5
10
15
20
Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT
1.50 432 2.28 640 3.00 832 3.78 1040 4.56 1248 5.34 1408 6.12 1520 6.90 1616 7.62 1664 8.40 1696
1.38 464 2.10 672 2.82 880 3.60 1120 4.32 1328 5.10 1472 5.82 1584 6.60 1664 7.32 1712 8.07 1776
0.96 512 1.68 720 2.46 960 3.24 1200 4.02 1408 4.74 1552 5.52 1664 6.30 1744 7.02 1792 7.80 1840
MUFZ-KW60VGHZ
CAPACITY: 6.5 kW
INPUT: 1880 W
INDOOR DB (°C)
15 21 26
OUTDOOR WB (°C)
-25
-20
-15
-10
-5
0
5
10
15
20
Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT
1.63 508 2.47 752 3.25 978 4.10 1222 4.94 1466 5.79 1654 6.63 1786 7.48 1899 8.26 1955 9.10 1993
1.50 545 2.28 790 3.06 1034 3.90 1316 4.68 1560 5.53 1730 6.31 1861 7.15 1955 7.93 2012 8.74 2087
1.04 602 1.82 846 2.67 1128 3.51 1410 4.36 1654 5.14 1824 5.98 1955 6.83 2049 7.61 2106 8.45 2162
NOTE: Q: Total capacity (kW) INPUT : Total power input (W) DB: Dry-bulb temperature WB: Wet-bulb temperature
28
OBH895
10 ACTUATOR CONTROL
MUFZ-KW25VGHZ MUFZ-KW35VGHZ MUFZ-KW50VGHZ MUFZ-KW60VGHZ
10-1. OUTDOOR FAN MOTOR CONTROL The fan motor turns ON/OFF, interlocking with
the compressor. [ON] The fan motor turns ON 5 seconds before the compressor
starts up. [OFF] The fan motor turns OFF 15 seconds after the compressor has
stopped running.
ON Compressor
5 seconds
15 seconds
OFF
Outdoor fan motor
ON OFF
10-2. R.V. COIL CONTROL Heating . . . . . . . . . . . . . . . . . ON Cooling .
. . . . . . . . . . . . . . . . OFF Dry . . . . . . . . . . . . . . . . . . .
. OFF
NOTE: The 4-way valve reverses for 5 seconds right before startup of the
compressor.
5 seconds
5 seconds
ON Compressor OFF
R.V.coil
ON OFF
Outdoor fan ON
motor
OFF
10-3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR
Sensor
Purpose
Actuator
Compressor
LEV
Outdoor fan motor
R.V. coil
Indoor fan motor
Defrost heater
Discharge temperature thermistor
Protection
Indoor coil temperature
Cooling: Coil frost prevention
thermistor
Heating: High pressure protection
Defrost thermistor Fin temperature thermistor
Heating: Defrosting Protection
Ambient temperature
Cooling: Low ambient temperature operation
thermistor
Heating: Defrosting (Heater)
Cooling: Low ambient temperaOutdoor heat exchanger tem- ture operation
perature thermistor
Cooling: High pressure protection
29
OBH895
11 SERVICE FUNCTIONS
MUFZ-KW25VGHZ MUFZ-KW35VGHZ MUFZ-KW50VGHZ MUFZ-KW60VGHZ
11-1. CHANGE IN DEFROST SETTING
Changing defrost finish temperature
(Refer to 12-6.1)
Jumper wire
Defrost finish temperature (°C)
MUFZ-KW25VGHZ MUFZ-KW35VGHZ
MUFZ-KW50VGHZ MUFZ-KW60VGHZ
JS
Soldered (Initial setting) None (Cut)
5 10
10 18
11-2. PRE-HEAT CONTROL SETTING PRE-HEAT CONTROL MUFZ-KW25/35 When moisture
gets into the refrigerant cycle, it may interfere the startup of the
compressor at low outside temperature. The pre-heat control prevents this
interference. The pre-heat control turns ON when the discharge temperature
thermistor is 20°C or below. When the pre-heat control turns ON, the
compressor is energized. (About 50 W) MUFZ-KW50/60 Prolonged low load
operation, in which the thermostat is OFF for a long time, at low outside
temperature (0°C or less) may cause the following troubles. To prevent those
troubles, activate the pre-heat control. 1) If moisture gets into the
refrigerant cycle and freezes, it may interfere the startup of the compressor.
2) If liquid refrigerant collects in the compressor, a failure in the
compressor may occur.
The pre-heat control turns ON when the compressor temperature is 20°C or
below. When the pre-heat control turns ON, the compressor is energized. (About
70 W)
Pre-heat control setting
NOTE: When the inverter P.C. board is replaced, check the jumper wires, and
cut/solder them if necessary.
30
OBH895
12 TROUBLESHOOTING
MUFZ-KW25VGHZ MUFZ-KW35VGHZ MUFZ-KW50VGHZ MUFZ-KW60VGHZ
12-1. CAUTIONS ON TROUBLESHOOTING 1. Before troubleshooting, check the following 1) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for miswiring. 2. Take care of the following during servicing
- Before servicing the air conditioner, be sure to turn OFF the main unit first with the remote controller, and then after confirming the horizontal vane is closed, turn OFF the breaker and/or disconnect the power plug. 2) Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the electronic control P.C. board. 3) When removing the electrical parts, be careful of the residual voltage of smoothing capacitor. 4) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the components. 5) When connecting or disconnecting the connectors, hold the connector housing. DO NOT pull the lead wires.
Lead wiring
Connector housing
3. Troubleshooting procedure 1) Check if the OPERATION INDICATOR lamp on the indoor unit is blinking on and off to indicate an abnormality. To make sure, check how many times the OPERATION INDICATOR lamp is blinking on and off before starting service work. 2) Before servicing, verify that all connectors and terminals are connected properly. 3) When the electronic control P.C. board seems to be defective, check for disconnection of the copper foil pattern and burnt or discolored components. 4) Refer to 12-2 and 12-3.
31
OBH895
12-2. FAILURE MODE RECALL FUNCTION Outline of the function This air
conditioner can memorize the abnormal condition which has occurred once. Even
though LED indication listed on the troubleshooting check table (12-3.)
disappears, the memorized failure details can be recalled.
1. Flow chart of failure mode recall function for the indoor/outdoor unit
Operational procedure
The cause of abnormality cannot be found because the abnormality does not
recur.
Setting up the failure mode recall function
Turn ON the power supply.
While pressing Operation select button and TEMP button on the remote
controller at the same time, press RESET button. First, release RESET button.
Hold down the other 2 buttons for another 3 seconds. Make sure that the
indicators on the LCD screen shown in the right figure are all displayed. Then
release the buttons.
Press OFF/ON (stop/operate) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit. *1
*1. Regardless of normal or abnormal condition, a short beep is emitted once the signal is received.
AM PM
AM PM
Does POWER lamp on the indoor unit blink at the interval of 0.5 seconds?
Blinks: Either indoor or outdoor unit is abnormal. Beep is
emitted at the same timing as the blinking of POWER lamp. *2
No (OFF)
Indoor unit is normal. But the outdoor unit might be abnormal because there are some abnormalities that cannot be recalled with this way. Check if outdoor unit is abnormal according to the detailed outdoor unit failure mode recall function. (Refer to 12-2.2)
Judgment of indoor/outdoor abnormality
Yes (Blinks)
Before blinking, does POWER lamp stay ON for 3 seconds?
When it stays ON for 3 seconds (without beep): The outdoor unit is abnormal.
Yes
No
The indoor unit is abnormal. Check the blinking pattern, and identify the abnormal point by referring to the table of indoor unit failure mode recall function. (Refer to indoor unit service manual.) Make sure to check at least 2 consecutive blinking cycles. *2
The outdoor unit is abnormal. Check the blinking pattern, and identify the abnormal point by referring to the table of outdoor unit failure mode recall function. (Refer to 12-2.3) Make sure to check at least 2 consecutive blinking cycles. *3
Releasing the failure mode recall function
Release the failure mode recall function by the following procedures. Turn OFF
the power supply and turn it ON again. Press RESET button of the remote
controller.
Repair the failure parts.
Deleting the memorized abnormal condition
After repairing the unit, recall the failure mode again according to “Setting
up the failure mode recall function” mentioned above. Press OFF/ON
(stop/operate) button of the remote controller (the set temperature is
displayed) with the remote controller headed towards the indoor unit. Press
the emergency operation switch so that the memorized abnormal condition is
deleted. *4 Release the failure mode recall function according to “Releasing
the failure mode recall function” mentioned above.
*4 The information regarding whether the connected outdoor unit is a low-standby-power model or a non-low-standby-power model will also be initialized. (Default= compatible with a low-standby-power model)
NOTE: 1. Make sure to release the failure mode recall function after it is set up, otherwise the unit cannot operate properly. 2. If the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized.
*2. Blinking pattern when the indoor unit is abnormal:
Blinking at 0.5-
Blinking at 0.5-
2.5-second OFF second interval 2.5-second OFF second interval
ON OFF
Beeps Repeated cycle
Beeps Repeated cycle
*3. Blinking pattern when the outdoor unit is abnormal:
Blinking at 0.5-
2.5-second OFF 3-second ON
second interval
2.5-second OFF
Beeps Repeated cycle
3-second ON
Blinking at 0.5second interval
ON OFF
No beep Repeated cycle
Beeps
No beep Repeated cycle
Beeps
Repeated cycle
32
OBH895
2. Flow chart of the detailed outdoor unit failure mode recall function
Operational procedure
The outdoor unit might be abnormal. Check if outdoor unit is abnormal
according to the following procedures.
Make sure that the remote controller is set to the failure mode recall
function.
With the remote controller headed towards the indoor unit, press TEMP button to adjust the set temperature to 25°C. *1
Does POWER lamp on the indoor unit blink at the interval of 0.5 seconds?
Blinks: The outdoor unit is abnormal. Beep is emitted
at the same timing as the blinking of POWER lamp. *2
Yes (Blinks)
No (OFF)
The outdoor unit is abnormal. Check the blinking pattern, and identify the abnormal point by referring to the table of outdoor unit failure mode recall function (12-2.3.). Make sure to check at least 2 consecutive blinking cycles. *2
*1. Regardless of normal or abnormal condition, 2 short beeps are emitted as the signal is received.
NOTE: It takes up to 1 minute to indicate the outdoor unit abnormality. Even
if POWER lamp is not lit, keep checking at least 1 minute or longer.
The outdoor unit is normal.
Releasing the failure mode recall function
Release the failure mode recall function by the following procedures. Turn OFF
the power supply and turn it ON again. Press RESET button of the remote
controller.
Release the failure mode recall function according to the left mentioned procedure.
Repair the failure parts.
Deleting the memorized abnormal condition
After repairing the unit, recall the failure mode again according to “Setting
up the failure mode recall function” (12-2.1.). Press OFF/ON (stop/operate)
button of the remote controller (the set temperature is displayed) with the
remote controller headed towards the indoor unit. Press the emergency
operation switch so that the memorized abnormal condition is deleted. *3
Release the failure mode recall function according to “Releasing the failure
mode recall function” mentioned above.
*3 The information regarding whether the connected outdoor unit is a low-standbypower model or a non-low-standby-power model will also be initialized. (Default= compatible with a low-standbypower model)
NOTE: 1. Make sure to release the failure mode recall function after it is set up, otherwise the unit cannot operate properly. 2. If the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized.
*2 Blinking pattern when outdoor unit is abnormal:
Blinking at 0.5-
2.5-second OFF 3-second ON
second interval
ON OFF
No beep Repeated cycle
Beeps
2.5-second OFF 3-second ON
Blinking at 0.5second interval
No beep Repeated cycle
Beeps
Repeated cycle
33
OBH895
3. Table of outdoor unit failure mode recall function NOTE: Blinking patterns of this mode differ from the ones of TROUBLESHOOTING CHECK TABLE (12-3.).
POWER lamp
Abnormal point
LED indication
(Indoor unit) (Failure mode/protection) (Outdoor P.C. board)
Condition
Remedy
Indoor/outdoor unit failure mode recall function
Outdoor unit failure mode recall function
OFF
None (Normal)
—
—
—
—
—
1-time blink 2.5 seconds OFF
Indoor/outdoor communication, receiving error
Indoor/outdoor communication, receiving error
Any signals from the inverter P.C.
·Refer to 12-5. How
—
board cannot be received normally for to check miswiring and
3 minutes. Although the inverter P.C. board
serial signal error. ·Refer to 12-5. How
—
sends signal “0”, signal “1” has been to check miswiring and
received 30 consecutive times.
serial signal error.
2-time blink Outdoor power system 2.5 seconds OFF
Overcurrent protection cut-out
· Reconnect
operates 3 consecutive times within connectors.
—
1 minute after the compressor gets started.
·Refer to 12-5. “How to check inverter/
compressor”.
·Check stop valve.
3-time blink Discharge temperature
1-time blink every Thermistor shorts or opens during
·Refer to 12-5.
2.5 seconds thermistor
2.5 seconds
compressor running.
“Check of outdoor
OFF
Defrost thermistor
thermistors”.
Fin temperature thermistor
P.C. board temperature thermistor Ambient temperature
3-time blink 2.5 seconds OFF
4-time blink 2.5 seconds OFF
2-time blink
Defective outdoor
thermistors can be
identified by checking the blinking pattern of
LED.
thermistor
2.5 seconds OFF
Outdoor heat exchanger temperature thermistor
—
4-time blink Overcurrent 2.5 seconds OFF
11-time blink
Large current flows into power module ·Reconnect
2.5 seconds OFF (IC700).
compressor connector.
·Refer to 12-5. “How to check inverter/
—
compressor”.
·Check stop valve.
Compressor synchronous 12-time blink
Waveform of compressor current is ·Reconnect
abnormality (Compressor startup failure protection)
2.5 seconds OFF distorted.
compressor connector.
·Refer to 12-5. “How
—
to check inverter/
compressor”.
5-time blink Discharge temperature 2.5 seconds OFF
Temperature of discharge temperature ·Check refrigerant
thermistor exceeds 116°C, compressor circuit and refrigerant
stops.
amount.
—
Compressor can restart if discharge ·Refer to 12-5. “Check
—
temperature thermistor reads 100°C or of LEV”.
less 3 minutes later.
6-time blink High pressure 2.5 seconds OFF
Temperature of indoor coil thermistor ·Check refrigerant
—
exceeds 70°C in HEAT mode. Temperature of defrost thermistor
circuit and refrigerant amount.
—
exceeds 70°C in COOL mode.
·Check stop valve.
7-time blink Fin temperature/P.C. board 7-time blink
Temperature of fin temperature thermistor ·Check around outdoor
2.5 seconds temperature
2.5 seconds OFF on the inverter P.C. board exceeds 75 ~ unit.
OFF
86°C (KW25/35) / 75 ~ 80°C (KW50/60), ·Check outdoor unit air
or temperature of P.C. board temperature passage.
—
thermistor on the inverter P.C. board
·Refer to 12-5. “Check
exceeds 72 ~ 85°C (KW25/35) / 70 ~
of outdoor fan motor”.
75°C (KW50/60).
8-time blink Outdoor fan motor 2.5 seconds OFF
Outdoor fan has stopped 3 times in a ·Refer to 12-5. “Check
—
row within 30 seconds after outdoor fan startup.
of outdoor fan motor”. Refer to 12-5. “Check
—
of inverter P.C. board”.
9-time blink Nonvolatile memory data 2.5 seconds
5-time blink 2.5 seconds OFF
Nonvolatile memory data cannot be read properly.
·Replace the inverter P.C. board.
OFF
Power module (IC700)
6-time blink
The interface short circuit occurs in the ·Refer to 12-5. “How
2.5 seconds OFF output of the power module (IC700). to check inverter/
—
The compressor winding shorts circuit. compressor”.
34
OBH895
NOTE: Blinking patterns of this mode differ from the ones of TROUBLESHOOTING CHECK TABLE (12-3.).
POWER lamp
Abnormal point
LED indication
(Indoor unit) (Failure mode/protection) (Outdoor P.C. board)
Condition
Remedy
Indoor/outdoor unit failure mode recall function
Outdoor unit failure mode recall function
10-time blink Discharge temperature 2.5 seconds OFF
Temperature of discharge temperature ·Refer to 12-5. “Check
thermistor has been 50°C or less for of LEV”.
—
20 minutes.
·Check refrigerant
—
circuit and refrigerant
amount.
11-time blink Bus-bar voltage (DC)
8-time blink
Bus-bar voltage of inverter cannot be ·Refer to 12-5. “How
2.5 seconds
OFF
Each phase current of
2.5 seconds OFF detected normally.
9-time blink
Each phase current of compressor
to check inverter/ compressor”.
—
compressor
2.5 seconds OFF cannot be detected normally.
14-time blink Stop valve (Closed valve) 2.5 seconds OFF *1
14-time blink 2.5 seconds OFF
·Closed valve is detected by compressor current.
·An abnormality of the indoor thermistors, the defrost thermistor or
ambient temperature thermistor is
detected.
·Check stop valve. ·Refer to “TEST POINT DIAGRAM AND VOLTAGE” on the service manual of indoor and outdoor unit for the characteristics of the thermistors. (Do not start the operation again without repair to prevent hazards.)
4-way valve/ Pipe temperature
16-time blink 2.5 seconds OFF
·The 4-way valve does not work
·Check the 4-way
properly.
valve.
·The indoor coil thermistor detects an ·Replace the inverter
abnormal temperature.
P.C. board.
·An abnormality of the indoor
·Refer to “TEST
thermistor is detected.
POINT DIAGRAM
AND VOLTAGE” on
the service manual of
indoor and outdoor unit
for the characteristics
of the thermistors. (Do
not start the operation
again without repair to
prevent hazards.)
16-time blink Outdoor refrigerant system
2.5 seconds abnormality OFF *1
1-time blink 2.5 seconds OFF
·A closed valve and air trapped in the ·Check for a gas leak
refrigerant circuit are detected based in a connecting piping
on the temperature sensed by the
etc.
indoor and outdoor thermistors and ·Check the stop valve.
the current of the compressor.
·Refer to 12-5.
·An abnormality of the indoor
“Check of outdoor
thermistors, the defrost thermistor or refrigerant circuit”.
ambient temperature thermistor is detected.
·Refer to “TEST POINT DIAGRAM
AND VOLTAGE” on
the service manual of
indoor and outdoor unit
for the characteristics
of the thermistors. (Do
not start the operation
again without repair to
prevent hazards.)
*1 There is possibility that diesel explosion may occur due to the air mixed in the refrigerant circuit. First, ensure that there are no leakage points on the valves, flare connections, etc. that allow the air to flow into the refrigerant circuit, or no blockage points (e.g. clogged or closed valves) in the refrigerant circuit that cause an increase in pressure. If there is no abnormal point like above and the system operates cooling and heating modes normally, the indoor thermistor might have a problem, resulting in false detection. Check both the indoor coil thermistor and the room temperature thermistor, and replace faulty thermistor(s), if any. NOTE: Do not start the operation again without repair to prevent hazards.
35
OBH895
12-3. TROUBLESHOOTING CHECK TABLE
No. Symptom
LED indication
Abnormal point/ Condition
Condition
Remedy
Outdoor unit 1-time blink every Outdoor power sys- Overcurrent protection cut- out operates 3 consecutive times ·Reconnect connector of compres-
does not op- 2.5 seconds
tem
within 1 minute after the compressor gets started.
sor.
1 erate.
·Refer to 12-5. “How to check inverter/compressor”.
·Check stop valve.
Outdoor thermistors Discharge temperature thermistor, fin temperature thermistor, ·Refer to 12-5. “Check of outdoor
defrost thermistor, P.C. board temperature thermistor, outdoor thermistors”.
2
heat exchanger temperature thermistor or ambient tempera-
ture thermistor shorts or opens during compressor running.
Outdoor control sys- Nonvolatile memory data cannot be read properly.
·Replace inverter P.C. board.
3
tem
(POWER lamp of the indoor unit lights up or blinks 7-time.)
4
6-time blink
Serial signal
2.5 seconds OFF
The communication fails between the indoor and outdoor unit ·Refer to 12-5. “How to check
for 3 minutes.
miswiring and serial signal error.
5
11-time blink
Stop valve/
2.5 seconds OFF Closed valve
Closed valve is detected by compressor current.
·Check stop valve.
14-time blink
Outdoor unit
Outdoor unit is defective.
6
2.5 seconds OFF (Other abnormality)
·Refer to 12-2.2. “Flow chart of the detailed outdoor unit failure mode recall function”.
16-time blink
4-way valve/
The 4-way valve does not work properly.
·Refer to 12-5. “Check of R.V.
7
2.5 seconds OFF Pipe temperature The indoor coil thermistor detects an abnormal temperature. coil”.
·Replace the inverter P.C. board.
17-time blink
Outdoor refrigerant A closed valve and air trapped in the refrigerant circuit are
·Check for a gas leak in a
2.5 seconds OFF system abnormality detected based on the temperature sensed by the indoor and connecting piping etc.
outdoor thermistors and the current of the compressor.
·Check the stop valve.
8
·Refer to 12-5. “Check of outdoor
refrigerant circuit”.
‘Outdoor unit 2-time blink
Overcurrent protec- Large current flows into power module (IC700).
· Reconnect connector of compressor.
9
stops and restarts 3
2.5 seconds OFF tion
·Refer to 12-5. “How to check inverter/compressor”.
minutes later’
·Check stop valve.
is repeated. 3-time blink
Discharge tem-
Temperature of discharge temperature thermistor exceeds ·Check refrigerant circuit and refrig-
10
2.5 seconds OFF perature overheat 116°C, compressor stops. Compressor can restart if discharge erant amount.
protection
temperature thermistor reads 100°C or less 3 minutes later. ·Refer to 12-5. “Check of LEV”.
4-time blink
Fin temperature / Temperature of fin temperature thermistor on the heat sink ex- ·Check around outdoor unit.
2.5 seconds OFF P.C. board tem-
ceeds 75 ~ 86°C (KW25/35)/75 ~ 80°C (KW50/60) or tempera- ·Check outdoor unit air passage.
11
perature thermistor ture of P.C. board temperature thermistor on the inverter P.C. ·Refer to 12-5. “Check of outdoor
overheat protection board exceeds 72 ~ 85°C (KW25/35)/70 ~ 75°C (KW50/60).
fan motor”.
5-time blink
High pressure pro- Indoor coil thermistor exceeds 70°C in HEAT mode. Defrost ·Check refrigerant circuit and refrig-
12
2.5 seconds OFF tection
thermistor exceeds 70°C in COOL mode.
erant amount.
·Check stop valve.
8-time blink
Compressor syn- The waveform of compressor current is distorted.
· Reconnect connector of compressor.
13
2.5 seconds OFF chronous abnormal-
·Refer to 12-5. “How to check
ity
inverter/compressor”.
10-time blink
Outdoor fan motor Outdoor fan has stopped 3 times in a row within 30 seconds ·Refer to 12-5. “Check of outdoor
14
2.5 seconds OFF
after outdoor fan startup.
fan motor. ·Refer to 12-5. “Check of inverter
P.C. board.
15
12-time blink
Each phase current Each phase current of compressor cannot be detected nor-
2.5 seconds OFF of compressor
mally.
·Refer to 12-5. “How to check inverter/compressor”.
13-time blink
Bus-bar voltage
2.5 seconds OFF (DC)
Bus-bar voltage of inverter cannot be detected normally.
·It occurs with following case. Instantaneous power voltage drop. (Short time power failure)
16
(KW50/60) ·Refer to 12-5. “Check of power
supply”. (KW50/60)
·Refer to 12-5. “How to check in-
verter/compressor”.
Outdoor unit 1-time blink
Frequency drop by KW25/35
When the input current exceeds approximately The unit is normal, but check the
operates. 17
2.5 seconds OFF current protection
3-time blink
Frequency drop by
2.5 seconds OFF high pressure pro-
10A, compressor frequency lowers.
KW50/60
Current from power outlet is nearing breaker capacity.
Temperature of indoor coil thermistor exceeds 55°C in HEAT mode, compressor frequency lowers.
following. ·Check if indoor filters are clogged. ·Check if refrigerant is short. ·Check if indoor/outdoor unit air circulation is short cycled.
tection
18
Frequency drop by Indoor coil thermistor reads 8°C or less in COOL mode, com-
defrosting in COOL pressor frequency lowers.
mode
4-time blink
Frequency drop by Temperature of discharge temperature thermistor exceeds ·Check refrigerant circuit and refrig-
2.5 seconds OFF discharge tempera- 111°C, compressor frequency lowers.
erant amount.
19
ture protection
·Refer to 12-5. “Check of LEV”.
·Refer to 12-5. “Check of outdoor
thermistors”.
KW25/35
Outside temperature When the outside temperature thermistor shorts or opens,
·Refer to 12-5. Check of outdoor
20
5-time blink
thermistor protec- protective operation without that thermistor is performed.
thermistors.
2.5 seconds OFF tion
36
OBH895
No. Symptom Outdoor unit
21 operates.
22
23
LED indication
Abnormal point/ Condition
Condition
7-time blink
Low discharge tem- Temperature of discharge temperature thermistor has been
2.5 seconds OFF perature protection 50°C or less for 20 minutes.
8-time blink 2.5 seconds OFF
KW25/35 PAM protection
PAM: Pulse Ampli-
tude Modulation
The overcurrent flows into PFC (Power factor correction: IC820) or the bus-bar voltage reaches 394 V or more, PAM stops and restarts.
KW50/60
Zero cross signal cannot be detected.
Zero cross detecting
circuit
9-time blink
Inverter check mode The connector of compressor is disconnected, inverter check
2.5 seconds OFF
mode starts.
Remedy
·Refer to 12-5. “Check of LEV”. ·Check refrigerant circuit and refrigerant
amount.
This is not malfunction. PAM protection will be activated in the following
cases: 1 Instantaneous power voltage
drop. (Short time power failure) 2 When the power supply voltage
is high.
·It occurs with following cases. 1 Instantaneous power voltage drop. (Short
time power failure) 2 Distortion of primary voltage
·Refer to 12-5. “Check of power supply”.
·Check if the connector of the compressor is correctly connected. Refer to
12-5. “How to check inverter/compressor”.
NOTE: 1. The location of LED is illustrated at the right figure. Refer to 12-6.1. 2. LED is lit during normal operation.
The blinking frequency shows the number of times the LED blinks after every 2.5-second OFF. (Example) When the blinking frequency is “2”.
0.5-second ON
0.5-second ON
Inverter P.C. board MUFZ-KW25/35VGHZ
LED Blinking
ON OFF
2.5-second OFF
2.5-second OFF
MUFZ-KW50/60VGHZ
Blinking LED
37
OBH895
12-4. TROUBLESHOOTING CRITERION OF MAIN PARTS
MUFZ-KW25VGHZ MUFZ-KW35VGHZ MUFZ-KW50VGHZ MUFZ-KW60VGHZ
Part name
Check method and criterion
Defrost thermistor (RT61) Measure the resistance with a tester.
Figure
Fin temperature thermistor (RT64)
Refer to 12-6. “Test point diagram and voltage”, 1. “Inverter P.C. board”, for the chart of thermistor.
Ambient temperature thermistor (RT65)
Outdoor heat exchanger temperature thermistor (RT68) Discharge temperature
thermistor (RT62)
Compressor
Measure the resistance with a tester. Before measurement, hold the thermistor with your hands to warm it up.
Refer to 12-6. “Test point diagram and voltage”, 1. “Inverter P.C. board”, for the chart of thermistor.
Measure the resistance between terminals using a tester. (Temperature: -10 to 40°C)
U-V U-W V-W
Normal () MUFZ-KW25VGHZ MUFZ-KW50VGHZ MUFZ-KW35VGHZ MUFZ-KW60VGHZ
0.82 – 1.11
0.87 – 1.18
WHT
RED BLK
W
V
U
Outdoor fan motor
Measure the resistance between lead wires using a tester. (Temperature: -10 ~ 40°C)
Color of lead wire
Normal ()
MUFZ-KW25VGHZ MUFZ-KW50VGHZ MUFZ-KW35VGHZ MUFZ-KW60VGHZ
RED BLK BLK WHT WHT RED
32 – 43
25 – 34
WHT RED BLK
W
V
U
R.V. coil (21S4)
Expansion valve coil (LEV)
Defrost heater
Measure the resistance using a tester. (Temperature: -10 to 40°C)
Normal (k)
MUFZ-KW25VGHZ MUFZ-KW50VGHZ MUFZ-KW35VGHZ MUFZ-KW60VGHZ
1.41 – 2.00
1.17 – 1.66
Measure the resistance using a tester. (Temperature: -10 to 40°C)
Color of lead wire RED ORN
Normal ()
RED WHT RED BLU RED YLW
37 – 54
Measure the resistance using a tester. (Temperature: -10 to 40°C)
Normal ()
MUFZ-KW25VGHZ MUFZ-KW50VGHZ MUFZ-KW35VGHZ MUFZ-KW60VGHZ
802 – 990
376 – 461
WHT
LEV
ORN RED (+12V)
YLW BLU
38
OBH895
12-5. TROUBLESHOOTING FLOW
A How to check inverter/compressor
Disconnect the connector between the compressor and the power module (IC700).
Check the voltage between terminals.
Are the voltages balanced? Yes
Check the compressor.
See 12-5. “Check of open phase”.
No
Replace the inverter P.C. board.
See 12-5. “Check of compressor”.
B Check of open phase
With the connector between the compressor and the power module (IC700) disconnected, activate the inverter and check if the inverter is normal by measuring the voltage balance between the terminals.
Output voltage is 50 – 130V. (The voltage may differ according to the tester.)
<< Operation method>>
Start cooling or heating operation by pressing the emergency operation switch on the indoor unit. (TEST RUN OPERATION:
Refer to 9-3.)
<
At 3 points
BLK (U)-WHT (V)
- Measure AC voltage between the lead wires at 3 points.
BLK (U)-RED (W)
WHT(V)-RED (W)
NOTE: 1. Output voltage varies according to power supply voltage. 2. Measure the voltage by analog type tester. 3. During this check, LED of the inverter P.C. board blinks 9 times. (Refer to 12-6.1.)
C Check of compressor
Refer to 12-5. “Check of compressor
winding”. Is the compressor normal?
No
Yes
Refer to 12-5. “Check of compressor
operation time”. Does the compressor operate continuously?
No
Yes
OK
Replace the compressor. Refer to 12-5. “Check of compressor start failure.
39
OBH895
D Check of compressor winding
Disconnect the connector between the compressor and the power module (IC700), and measure the resistance between the
compressor terminals.
<
At 3 points
BLK-WHT BLK-RED
- Measure the resistance between the lead wires at 3 points.
WHT-RED
<
Refer to 12-4.
0 [] ················Abnormal [short]
Infinite [] ·······Abnormal [open]
NOTE: Be sure to zero the ohmmeter before measurement.
E Check of compressor operation time
Connect the compressor and activate the inverter. Then measure the time until
the inverter stops due to overcurrent. <
9-3.) <
<
10 seconds
10 minutes
Compressor starts Abnormal (IC700 failure) (Compressor winding short) Abnormal
(Compressor lock out) (Starting defect) Abnormal (Poor contact) (Inverter P.C.
board defect) (Disconnected connector) Abnormal (Refrigerant circuit defect)
(Closed valve)
Normal
F Check of compressor start failure
Confirm that ~ is normal. ·Electrical circuit check
. Contact of the compressor connector . Output voltage of inverter P.C. board
and balance of them (See 12-5. ) . Direct current voltage between DB61(+) and
(-) (MUFZ-KW25/35VGHZ)/
IC700 (P) and (N) (MUFZ-KW50/60VGHZ) on the inverter P.C. board . Voltage
between outdoor terminal block S1-S2
Does the compressor run for 10 seconds or
more after it starts?
Yes
No
After the compressor is heated with a drier,
does the compressor start? *1
No
Yes
Compressor start failure. Activate pre-heat control. (Refer to 11-2. “PRE-HEAT CONTROL SETTING”)
Check the refrigerant circuit. Check the stop valve.
Replace the compressor.
*1 Heat the compressor with a drier for about 20 minutes. Do not recover refrigerant gas while heating.
Heating part
40
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G Check of outdoor thermistors
Disconnect the connector of thermistor in the inverter P.C. board (see below table), and measure the resistance of thermistor.
Is the resistance of thermistor normal?
(Refer to 12-6.1.)
No
Yes
Reconnect the connector of thermistor. Turn ON the power supply and press the emergency operation switch.
Replace the thermistor except RT64. When RT64 is abnormal, replace the inverter P.C. board.
Does the unit operate for 10 minutes or more
without showing thermistor abnormality?
No
Yes
OK (Cause is poor contact.)
Replace the inverter P.C. board.
MUFZ-KW25VGHZ MUFZ-KW35VGHZ
Thermistor
Symbol
Connector, Pin No.
Defrost
RT61 Between CN641 pin1 and pin2
Discharge temperature Fin temperature Ambient temperature
RT62 Between CN641 pin3 and pin4 RT64 Between CN642 pin1 and pin2 RT65 Between CN643 pin1 and pin2
Outdoor heat exchanger temperature RT68 Between CN644 pin1 and pin3
Board Inverter P.C. board
MUFZ-KW50VGHZ MUFZ-KW60VGHZ
Thermistor
Symbol
Connector, Pin No.
Defrost
RT61 Between CN671 pin1 and pin2
Discharge temperature Fin temperature
RT62 Between CN671 pin3 and pin4 RT64 Between CN673 pin1 and pin2
Ambient temperature
RT65 Between CN672 pin1 and pin2
Outdoor heat exchanger temperature RT68 Between CN671 pin5 and pin6
Board Inverter P.C. board
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H Check of R.V. coil
MUFZ-KW25VGHZ MUFZ-KW35VGHZ
- First of all, measure the resistance of R.V. coil to check if the coil is defective. Refer to 12-4. * In case CN721 is disconnected or R.V. coil is open, voltage is generated between the terminal pins of the connector
although no signal is being transmitted to R.V. coil. Check if CN721 is connected.
Unit operates in COOL mode even if it is set to HEAT mode.
Disconnect connector between the compressor and the IGBT module (IC700). Turn ON the power supply and press the emergency operation switch twice (HEAT mode).
Is there 230 V AC between CN721 and
on the inverter P.C. board 3 minutes after the power supply is turned ON?
No
Yes
Replace the inverter P.C. board.
Replace the 4-way valve.
Unit operates in HEAT mode even if it is set to COOL mode.
Disconnect connector between the compressor and the IGBT module (IC700). Turn ON the power supply and press the emergency operation switch once (COOL mode).
Is there 230 V AC between CN721 and on the inverter P.C. board 3 minutes
after the power supply is turned ON?
Yes
Replace the inverter P.C. board.
No
Replace the 4-way valve.
MUFZ-KW50VGHZ MUFZ-KW60VGHZ
- First of all, measure the resistance of R.V. coil to check if the coil is defective. Refer to 12-4. * In case CN602 is disconnected or R.V. coil is open, voltage is generated between the terminal pins of the connector
although no signal is being transmitted to R.V. coil. Check if CN602 is connected.
Unit operates in COOL mode even if it is set to HEAT mode.
Disconnect connector between the compressor and the power module (IC700). Turn ON the power supply and press the emergency operation switch twice (HEAT mode).
Is there 230 V AC between CN602 and
on the inverter P.C. board 3 minutes after the power supply is turned ON?
No
Yes
Replace the inverter P.C. board.
Replace the 4-way valve.
Unit operates in HEAT mode even if it is set to COOL mode.
Disconnect connector between the compressor and the power module (IC700). Turn ON the power supply and press the emergency operation switch once (COOL mode).
Is there 230 V AC between CN602 and on the inverter P.C. board 3 minutes
after the power supply is turned ON?
Yes
Replace the inverter P.C. board.
No
Replace the 4-way valve.
42
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I Check of outdoor fan motor
Disconnect the connectors CN931 and CN932 from the inverter P.C. board. Check
the connection between the connector CN931 and CN932.
Is the resistance between each ter-
minal of outdoor fan motor normal? (Refer to 12-4.)
Yes
No
Disconnect CN932 from the inverter P.C. board, and turn on the power supply.
Rotate the outdoor fan motor manually and measure the voltage of CN931. Between 1(+) and 5(-) Between 2(+) and 5(-) Between 3(+) and 5(-)
(Fixed to either 5 or 0 V DC) No
No Replace the outdoor fan motor.
Does the voltage between each terminal become 5 and 0V DC repeatedly?
Yes
Does the outdoor fan motor rotate smoothly? Yes
Replace the inverter P.C. board.
43
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J Check of power supply
Disconnect the connector between the compressor and the power module (IC700). Turn ON power supply and press the emergency operation switch.
Rectify indoor/outdoor connecting wire.
Does POWER lamp on the indoor
unit light up?
No
Yes
Is there bus-bar voltage 260 – 370V
DC between DB61 (+) and DB61 ()
(MUFZ-KW25/35VGHZ)/325 – 370 V
DC between IC700 (P) and (N)
Yes
(MUFZ-KW50/60VGHZ) on the
inverter P.C. board? (Refer to 12-6.1.)
No
Check the electric parts in main circuit.
Yes
Is there voltage 230 V AC between the indoor terminal block S1 and S2?
Replace the indoor
No
electronic control P.C. board.
Does LED on the inverter P.C. board light up or blink? (Refer to 12-6.1.)
No
Replace the inverter P.C. board.
Yes
If lights up, OK. If blinks, refer to 12-3.
DB61
260 – 370 V DC
Inverter P.C. board (Solder side)
MUFZ-KW25/35VGHZ
325 -370 V DC
IC700
N
P
MUFZ-KW50/60VGHZ
44
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K Check of LEV (Expansion valve)
Turn ON the power supply.
While pressing both Operation select button and TEMP button on the remote
controller at the same time, press RESET button. First, release RESET button.
Hold down the other 2 buttons for another 3 seconds. Make sure that the
indicators on the LCD screen shown in the right figure are all displayed. Then
release the buttons.
Press OFF/ON (stop/operate) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit. *1
AM PM
AM PM
Expansion valve operates in full-opening direction.
Do you hear the expansion valve “click,
click·······”? Do you feel the expansion valve vibrate Yes
OK
when touching it ?
No
*1. Regardless of normal or abnormal condition, a short beep is emitted once the signal is received.
Is LEV coil properly fixed to
the expansion valve?
No
Yes
Does the resistance of LEV
coil have the characteristics? (Refer to 12-4.)
Yes
No
Replace the LEV coil.
Properly fix the LEV coil to the expansion valve.
Measure each voltage between connector pins of CN724 on the inverter P.C.
board. 1. Pin (-) — Pin (+) 2. Pin (-) — Pin (+) 3. Pin (-) — Pin (+) 4. Pin
(-) — Pin (+) Is there about 3 – 5 V AC between each? NOTE: Measure the
voltage by an analog
tester.
Yes
Replace the inverter P.C. No board.
Replace the expansion valve.
NOTE: After check of LEV, take the following steps. 1. Turn OFF the power supply and turn it ON again. 2. Press RESET button on the remote controller.
45
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L Check of inverter P.C. board
Check the outdoor fan motor. (Refer to 12-5. .)
Is the fuse (F901) blown on the in-
verter P.C. board?
Yes
No
Check the connection of the connectors (CN931, CN932) of the outdoor fan motor. If the connection is poor, make it correct.
Operate the outdoor unit by starting EMERGENCY OPERATION.
Check the LED indication on the in-
verter P.C. board. Does the LED blink 10 times?
No
Yes (10-time blink)
Check the corresponding parts following LED indication. (Refer to 12-3.)
Replace the inverter P.C. board.
46
OBH895
M How to check miswiring and serial signal error
Turn the power supply OFF.
Is there rated voltage of 230 V AC in the
power supply?
No
Yes
Turn the power supply ON.
Is there 230 V AC between outdoor terminal
block S1 and S2?
No
Yes
Press the emergency operation switch once.
Check the power supply.
Check for miswiring, broken wires, and loose wire connection between the power
supply and outdoor terminal block S1 and between the power supply and outdoor
terminal block S2.
Does the left lamp of OPERATION INDICATOR lamp light up?
Is the serial signal error indicated 6 minutes
later?
No
Yes
No
Is there any miswiring, poor con-
tact, or wire disconnection of the indoor/outdoor connecting wire?
Yes Correct them.
No
A
Turn OFF the power supply. Check once again if the indoor/outB door connecting
wire is not wrongly connected.
Short-circuit the outdoor terminal block S2 and S3. *1
Turn the power supply ON.
*1 Miswiring may damage indoor electronic control P.C. board during operation.
Be sure to confirm the wiring is correct before theoperation starts.
Wait for 2 or more minutes after the power supply is turned on. Touch S2 and S3 with tester probes and start the emergency operation.
When the emergency operation starts, does the rated voltage occur for 2
seconds between indoor terminal block S2 and S3?
Yes
Does the left lamp of OPERATION INDICATOR lamp on indoor unit blink
continuously 6 minutes after No the emergency operation starts?
Yes
Does the outdoor LED light up?
Yes Confirm that the thermostat is OFF and wiring is not loose.
No No
Does the outdoor LED blink 6
times?
No
Yes
Does DC (6 V or more) occur
between indoor terminal block S2 and S3?
No
Yes
Turn the power supply OFF. Replace the indoor power P.C. board.
Replace the outdoor inverter P.C. board.2
Replace the outdoor inverter P.C. board.2
*2 Electric charge may remain immediately after the power supply is turned OFF. Perform the procedure after 3 minutes.
Turn the power supply OFF.
Turn the power supply ON.
Wait for 2 or more minutes after the power supply is turned ON. Touch CN202 and GND with tester probes and start the emergency operation.
During the emergency operation, does DC (2V or less) occur for 2 seconds
between CN202
and GND on the indoor power No P.C. board?
Yes
Replace the indoor power P.C. board.
Replace the indoor electronic control P.C. board.
Turn the power supply ON. Start the emergency operation.
Does the left lamp of OPERATION INDICATOR lamp on indoor unit blink
continuously 6 minutes after No the emergency operation starts?
Yes
Does DC (20 V or more) occur
between indoor terminal block S2
and S3?
No
Yes
Replace the indoor electronic control P.C. board.
Repair completed. Replace the outdoor inverter P.C. board.
47
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A
· Turn OFF inverter-controlled lighting equipment.
· Turn OFF the power supply and then turn ON again.
· Press the emergency operation switch.
· Reinstall
either the unit
or the light
away from
Is serial signal
each other.
error indicated 6 minutes later?
No
·Attach a filter on remote
Yes
control receiv-
ing section
of the indoor
B
unit.
N Check of the outdoor refrigerant circuit
Has the operation stopped during pump down? Yes No
The operation has stopped to prevent the diesel explosion caused by air
trapped in the refrigerant circuit. Close the stop valve, and disconnect the
power plug or turn the breaker OFF.
CAUTION: Do not start the operation again to prevent hazards.
Was the operation started with the stop valve closed, and was it opened during
operation? Yes
No
The unit occasionally stops when the stop valve is opened or closed during operation. Open the stop valve and start the cooling operation again.
The refrigerant gas amount may be 60% or less than the normal amount. Identify where the gas is leaking from, and fix the leak.
48
OBH895
O Electromagnetic noise enters into TV sets or radios
Is the unit earthed?
No
Yes
Earth the unit.
Is the distance between the antennas and the indoor unit within 3 m, or is the
distance between the antennas and the Yes outdoor unit within 3 m?
No
Extend the distance between the antennas and the indoor unit, and/or the antennas and the outdoor unit.
Is the distance between the TV sets or radios and the indoor unit within 1 m,
or is the distance between the TV sets or Yes radios and the outdoor unit
within 3 m?
No
Extend the distance between the TV sets and/ or radios and the indoor unit, or the TV sets or radios and the outdoor unit.
Are the antennas damaged? Is the coaxial cable damaged? Is there any poor
contact in the anten- Yes na wiring?
No
Replace or repair the antenna. Replace or repair the coaxial cable.
Is the indoor/outdoor connecting wire
of the air conditioner and the wiring of
the antennas close?
Yes
No
Extend the distance between the indoor/outdoor connecting wire of the air conditioner and the wiring of the antennas.
Even if all of the above conditions are fulfilled, the electromagnetic noise
may enter, depending on the electric field strength or the installation
condition (combination of specific conditions such as antennas or wiring).
Check the following before asking for service.
1. Devices affected by the electromagnetic noise TV sets, radios (FM/AM
broadcast, shortwave)
2. Channel, frequency, broadcast station affected by the electromagnetic
noise 3. Channel, frequency, broadcast station unaffected by the
electromagnetic noise 4. Layout of:
indoor/outdoor unit of the air conditioner, indoor/outdoor wiring, earth wire,
antennas, wiring from antennas, receiver
5. Electric field intensity of the broadcast station affected by the
electromagnetic noise 6. Presence or absence of amplifier such as booster 7.
Operation condition of air conditioner when the electromagnetic noise enters
in
- Turn OFF the power supply once, and then turn ON the power supply. In this
situation, check for the electromagnetic
noise. - Within 3 minutes after turning ON the power supply, press OFF/ON
(stop/operate) button on the remote controller for
power ON, and check for the electromagnetic noise. - After a short time (3 minutes later after turning ON), the outdoor unit
starts running. During operation, check for the
electromagnetic noise. - Press OFF/ON (stop/operate) button on the remote controller for power OFF,
when the outdoor unit stops but the
indoor/outdoor communication still runs on. In this situation, check for the electromagnetic noise.
49
OBH895
12-6. TEST POINT DIAGRAM AND VOLTAGE 1. Inverter P.C. board
MUFZ-KW25VGHZ MUFZ-KW35VGHZ
Back side of unit 230 V AC
DB61
260 – 370 V DC
(-)
(+)
Smoothing Smoothing Smoothing
capacitor capacitor capacitor (C61)
(C63)
(C62)
R.V.coil (CN721) 230 V AC
Fuse (F901) T3.15AL250V
Fuse (F801) T3.15AL250V
Fuse (F701) T3.15AL250V
Fuse (F62) 15 A 250 V Output to drive compressor (LDU, LDV, LDW)
Output to drive outdoor fan motor (CN932)
Front side of unit
Fuse (F61) 25 A 250V
230 V AC
LED
Jumper wire for pre-heat control setting (JK)
Jumper wire for changing defrost setting (JS)
Fin temperature thermistor/RT64 (CN642) Signal of outdoor fan motor (CN931) Ambient temperature thermistor/RT65 (CN643) Defrost thermistor /RT61(CN641) Discharge temperature thermistor/RT62 (CN641) Outdoor heat exchanger temperature thermistor /RT68 (CN644) LEV (CN724)
Resistance(k ) Resistance (k)
Resistance(k )
Defrost thermistor(RT61) Ambient temperature thermistor(RT65) Outdoor heat exchanger temperature thermistor(RT68) 100
90
80 70 60 50 40 30 20 10
0 -20 -10 0 10 20 30 40
Temperature( )
Discharge temperature thermistor (RT62) 800 700 600 500 400 300 200 100
0 0 10 20 30 40 50 60 70 80 90 100 110 120 Temperature (°C)
50
OBH895
Fin temperature thermistor(RT64) 200 180 160 140 120 100
80 60 40 20
0 0 10 20 30 40 50 60 70 80 Temperature( )
MUFZ-KW50VGHZ MUFZ-KW60VGHZ
LEV (CN724)
Ambient temperature thermistor/RT65 (CN672)
Outdoor heat exchanger temperature thermistor /RT68 (CN671) Discharge
temperature thermistor/RT62 (CN671) Defrost thermistor /RT61 (CN671) Fin
temperature thermistor/RT64 (CN673)
LED
Signal of outdoor fan motor (CN931)
IC700 (N) 325 – 370 V DC
IC700 (P)
Fuse (F901) T3.15AL250V Output to drive outdoor fan motor (CN932)
Jumper wire for pre-heat control setting (JK) Jumper wire for changing defrost
setting (JS)
Heater (CN601) 230 V AC R.V. coil (CN602) 230 V AC
Fuse (F601) T3.15AL250V
Fuse (F880) T3.15AL250V
230 V AC
Resistance(k ) Resistance (k)
Resistance(k )
Defrost thermistor(RT61) Ambient temperature thermistor(RT65) Outdoor heat exchanger temperature thermistor(RT68) 100
90
80
Discharge temperature thermistor (RT62)
70
800
700 60
600
50
500
40
400
30
300
20
200
10
0 -20 -10 0 10 20 30 40
Temperature (°C)
100
0 0 10 20 30 40 50 60 70 80 90 100 110 120 Temperature (°C)
51
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200 Fin temperature thermistor(RT64) 180 160 140 120 100
80 60 40 20
0 0 10 20 30 40 50 60 70 80 Temperature(°C)
13 DISASSEMBLY INSTRUCTIONS
(1) Slide the sleeve and check if there is a locking lever or not.
Sleeve
(2) The terminal with the connector shown below has the locking mechanism.
Locking lever
Slide the sleeve. Pull the terminal while pushing the locking lever.
Hold the sleeve, and pull out the terminal slowly.
Connector
13-1. MUFZ-KW25VGHZ MUFZ-KW35VGHZ
NOTE: Turn OFF the power supply before disassembly.
OPERATING PROCEDURE
: Indicates the visible parts in the photos/figures. : Indicates the invisible
parts in the photos/figures.
PHOTOS/FIGURES
1. Removing the cabinet (1) Remove the screws fixing the service panel. (2) Pull down the service panel and remove it. (3) Disconnect the power supply cord and indoor/outdoor connecting wire. (4) Remove the screws fixing the top panel. (5) Remove the top panel. (6) Remove the screws fixing the cabinet. (7) Remove the cabinet. (8) Remove the screws fixing the back panel. (9) Remove the screws of the terminal block support and the back panel. (10) Remove the back panel.
Photo 1 Screws of the top panel
Screws of the top panel
Back panel
Screw of the service panel
Photo 2
Screw of the cabinet
Screws of the cabinet
Service panel
Photo 3 Screws of the terminal block support and the back panel
Screws of the cabinet
OBH895
Direction to remove
Hooks of the service panel
52
Screws of the back panel
OPERATING PROCEDURE
PHOTOS/FIGURES
2. Removing the inverter assembly and inverter P.C.
Photo 4
Screw of the P.B. support
board
Ambient temperature
(1) Remove the cabinet and panels. (Refer to section 1.)
thermistor
(2) Disconnect the lead wire to the reactor and the following con-
and the separator
Screws of the terminal block
nectors:
support and
the back panel
CN721 (R.V. coil)
CN722 (Base heater)
CN931, CN932 (Fan motor)
CN641 (Defrost thermistor and discharge temperature ther-
mistor)
CN643 (Ambient temperature thermistor)
CN644 (Outdoor heat exchanger temperature thermistor)
CN724 (Expansion valve coil)
(3) Remove the compressor connector (CN61).
(4) Remove the screws fixing the heat sink support and the sep-
arator.
(5) Remove the fixing screw of the P.B. support and the separa-
tor.
(6) Remove the fixing screws of the terminal block support and the back panel.
(7) Remove the inverter assembly.
Screw of the heat sink support and the separator
(8) Remove the heat sink support from the P.C. board support. (9) Remove the screw of the inverter P.C. board and remove the Photo 5
inverter P.C. board from the P.C. board support.
- Connection procedure when attaching the inverter P.C.
board (Photo 5)
Lead wires of the heat exchanger temperature thermistor
Lead wires of the expansion valve coil
1. Connect the lead wires of the heat exchanger temperature thermistor to the
connector on the inverter P.C. board. Pull the lead wires of the heat
exchanger temperature thermistor toward you and put them on the left hook on
the P.C. board support so that the other lead wires are bundled up as shown in
Photo 5.
2. Connect the lead wires of the expansion valve coil to the connector on the
inverter P.C. board. Pull the lead wires of the expansion valve coil toward
you and put them on the right hook on the P.C. board support so that the other
lead wires are bundled up as shown in Photo 5.
Photo 6 (Inverter assembly)
Heat sink support
Heat sink
P.C. board support
Screws of the earth wire
Inverter P.C. board support
Inverter P.C. board Screw of the inverter P.C. board
53
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OPERATING PROCEDURE
3. Removing R.V. coil (1) Remove the cabinet and panels. (Refer to section
1.) (2) Disconnect the following connectors:
Photo 7
PHOTOS/FIGURES
Outdoor heat exchanger temperature thermistor
Defrost thermistor
4. Removing the discharge temperature thermistor, defrost thermistor, outdoor
heat exchanger temperature thermistor and ambient temperature thermistor (1)
Remove the cabinet and panels. (Refer to section 1.) (2) Disconnect the lead
wire to the reactor and the following connectors:
Photo 8
Screws of the outdoor fan motor
5. Removing outdoor fan motor (1) Remove the cabinet and panels. (Refer to
section 1.) (2) Disconnect the following connectors:
Propeller fan nut
Propeller fan
54
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OPERATING PROCEDURE
6. Removing the compressor and 4-way valve (1) Remove the cabinet and panels.
(Refer to section 1.) (2) Remove the inverter assembly. (Refer to section 2.)
(3) Recover gas from the refrigerant circuit. NOTE: Recover gas from the pipes
until the pressure gauge shows 0 kg/cm2 (0 MPa). (4) Detach the brazed part of
the suction and the discharge pipe connected with compressor. (5) Remove the
compressor nuts. (6) Remove the compressor. (7) Detach the brazed part of
pipes connected with 4-way valve.
PHOTOS/FIGURES
Photo 9 Discharge pipe brazed part
Suction pipe brazed part
Discharge temperature thermistor
Brazed parts of 4-way valve
55
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13-2. MUFZ-KW50VGHZ MUFZ-KW60VGHZ
NOTE: Turn OFF the power supply before disassembly.
OPERATING PROCEDURE
1. Removing the cabinet (1) Remove the screws of the service panel. (2)
Remove the screws of the top panel. (3) Remove the screw of the valve cover.
(4) Remove the service panel. (5) Remove the top panel. (6) Remove the valve
cover. (7) Disconnect the power supply cord and indoor/outdoor connecting
wire. (8) Remove the screws of the cabinet. (9) Remove the cabinet. (10)
Remove the screws of the back panel. (11) Remove the back panel.
PHOTOS/FIGURES
Photo 1 Screws of the top panel
Photo 2 Screws of the top panel
Screws of the cabinet
Screws of the cabinet
Screws of the cabinet
Screw of
Screws of
the valve cover the service panel
Screws of the back panel
56
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OPERATING PROCEDURE
PHOTOS/FIGURES
2. Removing the inverter assembly and inverter P.C.
Photo 3
board
Inverter P.C board
(1) Remove the cabinet and the service panel. (Refer to section
1.)
(2) Disconnect the lead wire to the reactor and the following
connectors:
CN601 (Base heater)
CN602 (R.V. coil)
CN931, CN932 (Fan motor)
CN671 (Defrost thermistor, discharge temperature thermistor
and outdoor heat exchanger temperature thermistor)
CN672 (Ambient temperature thermistor)
CN724 (Expansion valve coil)
(3) Remove the compressor connector.
(4) Remove the earth wires and the lead wires of the inverter P.C. Screws of
board.
the P.B.
(5) Remove the screws of the P.B. support.
support
(6) Remove the P.B. support from the relay panel.
(7) Remove the screws of the inverter P.C. board.
(8) Remove the inverter P.C. board from P.B. support.
- Notes about attaching the inverter P.C. board
1. When attaching the inverter P.C. board, clip the lead wires of the reactor to the wire saddles on the bottom of relay panel.
2. After attaching the inverter P.C. board, make sure that the lead wires are connected and placed as shown in Photo 3.
Screw of the relay panel
Earth wires
Screws of the relay panel Screw of the P.B. support
Photo 4
57
OBH895
Screws of the inverter P.C. board
OPERATING PROCEDURE
3. Removing R.V. coil (1) Remove the cabinet and panels. (Refer to section
1.) (2) Disconnect the following connector:
Photo 5
PHOTOS
Screw of the R.V. coil
Brazed parts of 4-way valve
4. Removing the discharge temperature thermistor, defrost thermistor, outdoor
heat exchanger temperature thermistor and ambient temperature thermistor (1)
Remove the cabinet and panels. (Refer to section 1.) (2) Disconnect the lead
wire to the reactor and the following connectors:
Photo 6
Outdoor heat exchanger temperature thermistor
Ambient temperature thermistor
Defrost thermistor
58
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OPERATING PROCEDURE
5. Removing outdoor fan motor (1) Remove the top panel, cabinet and service
panel. (Refer to section 1.)
(2) Disconnect the following connectors:
(3) Remove the propeller fan nut. (4) Remove the propeller fan. (5) Remove the
screws fixing the fan motor. (6) Remove the fan motor.
Photo 7
PHOTOS/FIGURES
Propeller fan nut Propeller fan
Screws of the outdoor fan motor
6. Removing the compressor and 4-way valve (1) Remove the top panel, cabinet and service panel. (Refer to section 1.) (2) Remove the back panel. (Refer to section 1.) (3) Remove the screws fixing the relay panel. (4) Remove the relay panel. (5) Remove the inverter assembly. (Refer to section 2.) (6) Recover gas from the refrigerant circuit. NOTE: Recover gas from the pipes until the pressure gauge shows 0 kg/cm2 (0 MPa). (7) Detach the brazed part of the suction and the discharge pipe connected with compressor. (8) Remove the compressor nuts. (9) Remove the compressor. (10) Detach the brazed parts of 4-way valve and pipe. (Photo 6)
Photo 8
Brazed part of the discharge pipe
Brazed part of the suction pipe
Discharge temperature thermistor
59
OBH895
HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
© Copyright 2021 MITSUBISHI ELECTRIC CORPORATION Published: Jul. 2021. No.
OBH895
Made in Japan
Specifications are subject to change without notice.
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