MITSUBISHI ELECTRIC PKA-A12LA1 Split System Heat Pump User Manual
- June 17, 2024
- Mitsubishi Electric
Table of Contents
- MITSUBISHI ELECTRIC PKA-A12LA1 Split System Heat Pump
- Product Usage Instructions
- Frequently Asked Questions
- REFERENCE MANUAL
- SAFETY PRECAUTION
- PARTS NAMES AND FUNCTIONS
- NOISE CRITERION CURVES
- REFRIGERANT SYSTEM DIAGRAM
- TROUBLESHOOTING
- OPERATION PROCEDURE
- MENU RETURN SELECT HOLD
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
MITSUBISHI ELECTRIC PKA-A12LA1 Split System Heat Pump
Product Specifications
- Model Name: PKA-A12LA1, PKA-A18LA1
- Service Reference: PKA-A12LA1, PKA-A18LA1
- Indoor Unit: Split-System Heat Pump
- Service Manual Date: March 2023
Product Usage Instructions
Indoor Unit Controls
The indoor unit is equipped with the following controls:
- MENU
- RETURN
- SELECT
- ON
- HOLD
- OFF
Remote Controllers
The product supports wireless and wired remote controllers as options for convenient operation.
Parts Catalog and Manuals
- Parts Catalog: TCB117
- Service Manual: PUZ-A12/18NKA7, PUY-A12/18NKA7, PUZ-A12/18NKA8, PUZ-A24NHA8, PUY-A12/18NKA8, PUY-A24NHA8, PUZ-HA24NHA1, PUZ-HA36NKA
- Service Manual No./Parts Catalog No.: OCH636/OCB636, OCH764/OCB764, OCH750/OCB750
Safety Precautions
Always observe safety precautions before accessing terminals. Ensure all supply circuits are disconnected.
Cautions for Refrigerant R410A
When working with R410A refrigerant, follow these precautions:
- Use specified tools for R410A.
- Clean refrigerant piping thoroughly to avoid contamination.
- Avoid using charging cylinders to prevent refrigerant composition changes.
- Ventilate the room in case of refrigerant leaks to prevent release of poisonous gases.
Frequently Asked Questions
- Q: Can I use refrigerant other than R410A with this product?
- A: No, using refrigerant other than R410A can cause deterioration of refrigerant oil and malfunction of the product.
- Q: What precautions should I take during repair services?
- A: Always use new refrigerant pipes, clean the refrigerant piping thoroughly, and use specified tools designed for R410A refrigerant to prevent any issues.
“`
SPLIT-SYSTEM HEAT PUMP
SERVICE MANUAL
Indoor unit [Model Name] PKA-A12LA1
PKA-A18LA1
[Service Ref.] PKA-A12LA1 PKA-A18LA1
March 2023
No. TCH117
INDOOR UNIT
MENU RETURN SELECT
ON
HOLD
OFF
WIRELESS REMOTE CONTROLLER (Option)
WIRED REMOTE CONTROLLER (Option)
REFERENCE MANUAL
OUTDOOR UNIT’S SERVICE MANUAL
Model name
PUZ-A12/18NKA7 PUY-A12/18NKA7 PUZ-A12/18NKA8 PUZ-A24NHA8 PUY-A12/18NKA8 PUY-
A24NHA8 PUZ-HA24NHA1 PUZ-HA36NKA
Service Ref.
PUZ-A12/18NKA7 PUY-A12/18NKA7 PUZ-A12/18NKA8 PUZ-A24NHA8 PUY-A12/18NKA8 PUY-
A24NHA8 PUZ-HA24NHA1 PUZ-HA36NKA
Service manual No./Parts catalog No. OCH636/OCB636 OCH764/OCB764 OCH750/OCB750
SAFETY PRECAUTION
2-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuits must be disconnected.
2-2. CAUTIONS RELATED TO NEW REFRIGERANT
Cautions for units utilising refrigerant R410A
TCH117
2
Preparation before the repair service.
· Prepare the proper tools. · Prepare the proper protectors. · Provide
adequate ventilation. · After stopping the operation of the air conditioner,
turn off
the power-supply breaker. · Discharge the condenser before the work involving
the
electric parts.
Use new refrigerant pipes.
In case of using the existing pipes for R22, be careful with the following: ·
Be sure to clean the pipes and make sure that the insides
of the pipes are clean. · Change flare nut to the one provided with this
product.
Use a newly flared pipe. · Avoid using thin pipes. · In case of reconnecting
the refrigerant pipes after
detaching, make the flared part of pipe re-fabricated.
Make sure that the inside and outside of refrigerant piping is clean and it
has no contamination such as sulfur hazardous for use, oxides, dirt, shaving
particles, etc. In addition, use pipes with specified thickness.
Contamination inside refrigerant piping can cause deterioration of refrigerant
oil, etc.
Precautions during the repair service.
· Do not perform the work involving the electric parts with wet hands.
· Do not pour water into the electric parts. · Do not touch the refrigerant. ·
Do not touch the hot or cold areas in the refrigerating cycle. · When the
repair or the inspection of the circuit needs to be
done without turning off the power, exercise great caution not to touch the
live parts. · When opening or closing the valve below freezing temperatures,
refrigerant may spurt out from the gap between the valve stem and the valve
body, resulting in injuries.
Use a vacuum pump with a reverse flow check valve.
Vacuum pump oil may flow back into refrigerant cycle and that can cause
deterioration of refrigerant oil, etc.
Use the following tools specifically designed for use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant.
Tools for R410A
Gauge manifold
Flare tool
Charge hose
Size adjustment gauge
Gas leak detector
Vacuum pump adaptor
Torque wrench
Electronic refrigerant
charging scale
Store the piping indoors, and keep both ends of the piping sealed until just
before brazing. (Leave elbow joints, etc. in their packaging.)
If dirt, dust or moisture enters into refrigerant cycle, that can cause
deterioration of refrigerant oil or malfunction of compressor.
The refrigerant oil applied to flare and flange connections must be ester oil,
ether oil or alkylbenzene oil in a small amount. If large amount of mineral
oil enters, that can cause deterioration of refrigerant oil, etc.
Charge refrigerant from liquid phase of gas cylinder. If the refrigerant is
charged from gas phase, composition change may occur in refrigerant and the
efficiency will be lowered.
Do not use refrigerant other than R410A.
If other refrigerant (R22, etc.) is used, chlorine in refrigerant can cause
deterioration of refrigerant oil, etc.
Handle tools with care.
If dirt, dust or moisture enters into refrigerant cycle, that can cause
deterioration of refrigerant oil or malfunction of compressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigerant will change and
the efficiency will be lowered.
Ventilate the room if refrigerant leaks during operation. If refrigerant comes
into contact with a flame, poisonous gases will be released.
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.
TCH117
3
[1] Warning for service
(1) Do not alter the unit. (2) For installation and relocation work, follow
the instructions in the Installation Manual and use tools and pipe
components specifically made for use with refrigerant specified in the outdoor
unit installation manual. (3) Ask a dealer or an authorized technician to
install, relocate and repair the unit. (4) This unit should be installed in
rooms which exceed the floor space specified in outdoor unit installation
manual.
Refer to outdoor unit installation manual. (5) For appliances not accessible
to the general public. (6) Refrigerant pipes connection shall be accessible
for maintenance purposes. (7) If the air conditioner is installed in a small
room or closed room, measures must be taken to prevent the refrig-
erant concentration in the room from exceeding the safety limit in the event
of refrigerant leakage. Should the refrigerant leak and cause the
concentration limit to be exceeded, hazards due to lack of oxygen in the room
may result. (8) Keep gas-burning appliances, electric heaters, and other fire
sources (ignition sources) away from the location where installation, repair,
and other air conditioner work will be performed. If refrigerant comes into
contact with a flame, poisonous gases will be released. (9) When installing or
relocating, or servicing the air conditioner, use only the specified
refrigerant written on outdoor unit to charge the refrigerant lines. Do not
mix it with any other refrigerant and do not allow air to remain in the lines.
If air is mixed with the refrigerant, then it can be the cause of abnormal
high pressure in the refrigerant line, and may result in an explosion and
other hazards. (10) After installation has been completed, check for
refrigerant leaks. If refrigerant leaks into the room and comes into contact
with the flame of a heater or portable cooking range, poisonous gases will be
released. (11) Do not use low temperature solder alloy in case of brazing the
refrigerant pipes. (12) When performing brazing work, be sure to ventilate the
room sufficiently. Make sure that there are no hazardous or flammable
materials nearby. When performing the work in a closed room, small room, or
similar location, make sure that there are no refrigerant leaks before
performing the work. If refrigerant leaks and accumulates, it may ignite or
poisonous gases may be released. (13) Do not install the unit in places where
refrigerant may build-up or places with poor ventilation such as a
semibasement or a sunken place in outdoor: Refrigerant is heavier than air,
and inclined to fall away from the leak source. (14) Do not use means to
accelerate the defrosting process or to clean, other than those recommended by
the manufacturer. (15) 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). (16) Do not pierce
or burn. (17) Be aware that refrigerants may not contain an odour. (18) Pipe-
work shall be protected from physical damage. (19) The installation of pipe-
work shall be kept to a minimum. (20) Compliance with national gas regulations
shall be observed. (21) Keep any required ventilation openings clear of
obstruction. (22) Servicing shall be performed only as recommended by the
manufacturer. (23) The appliance shall be stored in a well-ventilated area
where the room size corresponds to the room area as specified for operation.
(24) Maintenance, service and repair operations shall be performed by
authorized technician with required qualification.
[2] Cautions for service
(1) Perform service after recovering the refrigerant left in unit completely.
(2) Do not release refrigerant in the air. (3) After completing service,
charge the cycle with specified amount of refrigerant. (4) When performing
service, install a filter drier simultaneously.
Be sure to use a filter drier for new refrigerant.
[3] Additional refrigerant charge
When charging directly from cylinder (1) Check that cylinder for R410A
available on the market is a syphon type. (2) Charging should be performed
with the cylinder of syphon stood vertically. (Refrigerant is charged from
liquid phase.)
TCH117
4
Unit
Electronic weighing scale
[4] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Tool name 1. Gauge manifold
2. Charge hose 3. Electronic weighing scale 4. Gas leak detector 5. Adaptor
for reverse flow check 6. Refrigerant charge base 7. Refrigerant cylinder
8. Refrigerant recovery equipment
Specifications · Use the existing fitting specifications. (UNF1/2) · Use high-
tension side pressure of 5.3MPa·G [768.7 PSIG] or over. · Use pressure
performance of 5.09MPa·G [738.2 PSIG] or over.
· Use the detector for R410A. · Attach on vacuum pump.
· Top of cylinder (R410A refrigerant)
· Cylinder with syphon
PARTS NAMES AND FUNCTIONS
Front Panel
Filter
Air intake
Louver
Vane
Air outlet
Emergency operation switch
Operation indicator lamp Remote control receiving section
TCH117
5
INDOOR UNIT
4 SPECIFICATIONS
Service Ref.
Mode
Power supply (phase, voltage, cycle)
Input
Running current
External finish (Panel)
Heat exchanger
Dimensions
W
D
H
Weight
Fan Fan (drive) × No.
Fan motor output
Fan motor
Airflow (Lo-Mid2-Mid1-Hi)
External static pressure Noise level (Lo-Mid2-Mid1-Hi)
kW A
mm (inch) mm (inch) mm (inch)
kg (lbs)
kW F.L.A m3/min CFM Pa (mmAq)
dB
PKA-A12LA1
Cooling
Heating
Single phase, 208/230 V, 60Hz
0.06
0.03
0.55
0.30
Munsell 0.7PB 9.2/0.4
Plate fin coil
898 (35-23/64)
237 (9-11/32)
299 (11-25/32)
12.7 (28.0)
Line flow fan (direct) × 1
0.030
0.19
6.1 – 7.3 – 9.0 – 10.7
7.5 – 8.2 – 9.2 – 10.9
215 – 255 – 320 – 375
265 – 290 – 325 – 385
0 (direct blow)
34 – 39 – 44 – 48
34 – 37 – 40 – 43
Service Ref.
Mode
Power supply (phase, voltage, cycle)
Input
Running current
External finish (Panel)
Heat exchanger
Dimensions
W
D
H
Weight
Fan Fan (drive) × No.
Fan motor output
Fan motor
Airflow (Lo-Mid2-Mid1-Hi)
External static pressure Noise level (Lo-Mid2-Mid1-Hi)
kW A
mm (inch) mm (inch) mm (inch)
kg (lbs)
kW F.L.A m3/min CFM Pa (mmAq)
dB
PKA-A18LA1
Cooling
Heating
Single phase, 208/230 V, 60Hz
0.06
0.04
0.55
0.45
Munsell 0.7PB 9.2/0.4
Plate fin coil
898 (35-23/64)
237 (9-11/32)
299 (11-25/32)
12.7 (28.0)
Line flow fan (direct) × 1
0.030
0.19
6.1 – 7.3 – 9.0 – 10.7
7.5 – 8.9 – 10.6 – 12.7
215 – 255 – 320 – 375
265 – 310 – 375 – 450
0 (direct blow)
34 – 39 – 44 – 48
34 – 39 – 44 – 48
INDOOR UNIT
TCH117
6
OCTAVE BAND SOUND PRESSURE LEVEL, dB0dB=0.0002bar) 1.0m [3.3 ft]
NOISE CRITERION CURVES
5-1. NOISE CRITERION CURVES
FAN SPL(dB) LINE
High
48
Medium 1 44
Medium 2 39
Low
34
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
Approximate minimum audible limit on continuous noise
NC-20
10 63
125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz
Main unit
TCH117
Measurement location 1.0m [3.3 ft] * Measured in anechoic room.
Wall
7
1-59/64(49)
(163) 6-27/64
1-31/32(50) MIN.
IN CASE OF LEFT PIPING, LEFT BACK PIPING,2-11/64(55) MIN. OR OPTIONAL DRAIN
PUMP INSTALLATION,2-61/64(75) MIN.
E
6 OUTLINES AND DIMENSIONS
TCH117
REQUIRED SPACE(INDOOR UNIT)
AIR INLET
TOP
10-63/64(279)
10-63/64(279)
OPERATING RANGE OF THE HORIZONTAL VANE
8
F
2-23/64(60)
OR LESS
E
MIN. 9/32(7)
F MORE THAN 2-23/64(60)
MIN. 2-23/64(60)
WITH OPTIONAL DRAIN PUMP
MIN. 9-27/32(250)
DETAILS OF CUT OUT FOR PIPING HOLE
D
1-31/32(50) MIN.
IN CASE OF OPTIONAL DRAIN PUMP INSTALLATION, 13-25/32(350) MIN.
10-15/64(260) MIN.
A
AIR OUTLET 5-29/32(150) MIN.
LEFT
(250) 9-27/32 MIN.
FRONT
22-43/64(576)
5-45/64(145)
RIGHT
INSTALLATION PLATE
11-25/32(299)
(47) 1-27/32
(59) 2-21/64
2-3/4
(70)
(50) 1-31/32
25/64(10)
C
3/4(19)
SLEEVE THROUGH HOLE
2-61/64 2-61/64 3-5/32
( 75)
( 75 80)
INDOOR UNIT
0 9/32(7.2 )
5/8(16) 59/64(23.5 ) 1-17/64( 32.2 ) 1-49/64( 44.7 ) 2-63/64( 76) 4-7/32(107.2
) 4-23/32(119.7 ) 5-13/64(132.2 ) 6-3/16(157.2 )
9-41/64(244.7 ) 10-1/8(257.2 )
17-43/64( 449) 15-13/32( 391.5)
11-1/4( 287.2) 9-3/8( 238) 0
5-5/64( 128.8 ) 5-37/64( 141.8 )
8-11/32( 212) 11-1/8( 282.5 )
( 392.5) 15-29/64
( 449) 17-43/64
14-21/64( 364) 13-25/32( 350.2 ) 12-41/64( 321.2 ) 10-51/64( 274.2 ) 9-1/8(
231.7 ) 6-1/2(165) 4-59/64(125) 19/32(15) 0 19/32(15) 4-59/64(125) 6-1/2(165)
( 231.7 ) 10-51/64 11-15/64( 285.2) 12-41/64( 321.2) 13-25/32( 350.2)
14-21/64( 364) 29×
13/64( 5.1HOLE)
2-9/16(65) 2-9/16(65)
B
(67) 2-41/64
1-61/64(49.5)
2-3/4(70)
1-21/32(50)
3-27/64(87)
INSTALLATION PLATE
5× 23/64( 9HOLE)
WALL HOLE 2-61/34( 75) FOR LEFT BACK PIPING
25/64(10)
(67) 2-41/64
D
1-59/64(49)
25-19/32(650)
LEFT PIPING CUT OUT AREA REFRIGERANT PIPE,DRAIN PIPE
35-23/64(898)
FRONT(OPEN THE GRILLE)
TEMPORARILY FIXING HOLE
WALL HOLE 2-61/64( 75) FOR RIGHT BACK PIPING
4.3HOLE)
11/64(
4×
63/64( 25)
0 63/64( 25)
2-1/4( 57.2 ) 2-3/4( 69.7 ) 3-15/64(82.2)
4-55/64(123.5)
DRAIN HOSE
BOTTOM
6-31/32(177.2) 7-15/32(189.7) 9-1/16(230)
10-25/32( 274 )
17-23/32(450)(GAS PIPE) 20-63/64(533)(LIQUID PIPE)
AUTO VANES
C
LOUVERS(MANUAL)
B
UNDER PIPING CUT OUT AREA
REFRIGERANT PIPE,DRAIN PIPE
WALL HOLE 2-61/64( 75) FOR RIGHT BACK CONDIT CABLE
7-53/64(199)
A
9-11/32(237) 13/64(5) RIGHT PIPING CUT OUT AREA REFRIGERANT PIPE,DRAIN PIPE
TERMINAL BLOCK FOR INDOOR/OUTDOOR CONNECTING LINE MA-REMOTE CONTROLLER
TERMINAL BLOCK
EMERGENCY OPERATION SWITCH(HEAT)
EMERGENCY OPERATION SWITCH(COOL)
OPERATING LAMP(GREEN)
7-9/16(192)
STANDBY LAMP(ORANGE)
7-1/64(178) 6-19/64(160)
1. FOR CEILING CORNICE: CONSIDER THE DIMENSION
FOR INSTALLATION.
2. MOUNTING BOLT FOR INSTALLATION PLATE: M10 OR W3/8
TAPPING SCREW: NOMINAL DIAMETER · · · 5/32(4)
LENGTH · · · 63/64(25) MIN
SCREW TIGHT AT INSTALLATION PLATE HOLE {11/64( 4.3)}
ON THE UPPER AND LOWER SIDE EVENLY.
DO NOT SCREW TIGHT ONLY IN LINE.
3. REFRIGERANT LIQUID PIPE
1/4( 6.35)
PIPING
GAS PIPE
1/2( 12.7)
DRAIN HOSE CONNECTION 5/8( 16)
INSULATION 1-9/64( 29)
4. LEFT PIPE: CONNECT DRAIN HOSE TO CONNECTION PORT
RECEIVER
ON THE LEFT SIDE OF DRAIN PAN. EXCHANGE DRAIN HOSE AND RUBBER CAP
AND BUTT THEM AGAINST DRAIN PORT.
5. DRAIN PIPE EFFECTIVE LENGTH · · · 19-11/16(500)
UNDER PIPING CUT OUT AREA REFRIGERANT PIPE,DRAIN PIPE
Unit: inch (mm)
7 WIRING DIAGRAM
TCH117
9
REFRIGERANT SYSTEM DIAGRAM
Heat exchanger
Strainer (#50)
Refrigerant GAS pipe connection (Flare)
Thermistor TH2 (Pipe temperature/liquid)
Refrigerant flow in cooling Refrigerant flow in heating
Thermistor TH5 (Cond./ Eva.temperature)
Thermistor TH1 (Room temperature)
Distributor with strainer (#100/#50)
Refrigerant LIQUID pipe connection (Flare)
Strainer (#100)
TCH117
10
TROUBLESHOOTING
9-1. TROUBLESHOOTING
<Check code displayed by self-diagnosis and actions to be taken for service
(summary)> Present and past check codes are logged, and they can be displayed
on the wired remote controller or controller board of outdoor unit. Actions to
be taken for service, which depends on whether or not the trouble is
reoccurring in the field, are summarized in the table below. Check the
contents below before investigating details.
Unit conditions at service The trouble is reoccurring.
Check code
Actions to be taken for service (summary)
Judge the problem and take a corrective action according to “9-3. SELF-
DIAGNOSIS ACTION TABLE”.
Displayed
Conduct troubleshooting and ascertain the cause of the trouble according to
“9-4. TROUBLESHOOTING OF PROBLEMS”.
Not displayed
The trouble is not reoccurring.
Logged Not logged
Consider the temporary defects such as the work of protection devices in the
refrigerant circuit including compressor, poor connection of wiring, noise,
etc. Re-check the symptom, and check the installation environment, refrigerant
amount, weather when the trouble occurred, matters related to wiring, etc.
Reset check code logs and restart the unit after finishing service. There is
no abnormality in electrical component, controller board, remote controller,
etc.
Re-check the abnormal symptom. Conduct troubleshooting and ascertain the cause
of the trouble according to “9-4. TROUBLESHOOTING OF PROBLEMS”. Continue to
operate unit for the time being if the cause is not ascertained. There is no
abnormality concerning of parts such as electrical component, controller
board, remote controller, etc.
TCH117
11
9-2. MALFUNCTION-DIAGNOSIS METHOD BY REMOTE CONTROLLER
Refer to “13-7. SELF-DIAGNOSIS” to search for the error history.
[Output pattern A]
Beeper sounds Beep
Beep Beep Beep
Beep
OPERATION
1st
2nd 3rd
nth
INDICATOR
lamp blink pattern
Off Self-check Approx. 2.5 s
On On On 0.5 s 0.5 s 0.5 s
On
Off
0.5 s Approx. 2.5 s
starts
(Start signal received)
Number of blinks/beeps in pattern indicates the check code in the following table (i.e., n=5 for “P5”)
Beep Beep 1st 2nd · · ·Repeated
On
On
0.5 s 0.5 s
Number of blinks/beeps in pattern indicates the check code in the following table
[Output pattern B]
Beeper sounds Beep
OPERATION
INDICATOR
lamp blink pattern
Off Self-check Approx. 2.5 s
starts
(Start signal
received)
On Approx. 3 s
Beep Beep Beep
1st
2nd
3 rd
On On On 0.5 s 0.5 s 0.5 s
Beep nth
On
Off
0.5 s Approx. 2.5 s
Number of blinks/beeps in pattern indicates the check code in the following table (i.e., n=5 for “U2”)
On Approx. 3 s
Beep Beep 1st 2nd · · ·Repeated
On
On
0.5 s 0.5 s
Number of blinks/beeps in pattern indicates the check code in the following table
[Output pattern A] Errors detected by indoor unit
Wireless remote controller Wired remote controller
Beeper sounds/OPERATION INDICATOR lamp blinks (Number of times)
Check code
Symptom
1
P1
Intake sensor error
2
P2
Pipe (TH2) sensor error
P9
Pipe (TH5) sensor error
3
E6,E7
Indoor/outdoor unit communication error
4
P4
Drain sensor error/Float switch connector (CN4F) open
5
P5
Drain pump error
PA
Forced compressor stop(due to water leakage abnormality)
6
P6
Freezing/Overheating protection operation
7
EE
Combination error between indoor and outdoor units
8
P8
Pipe temperature error
9
E4, E5
Remote controller signal receiving error
10
11
Pb
Indoor unit fan motor error
12
Fb (FB)*
Indoor unit control system error (memory error, etc.)
14 No sound
PL E0, E3
Abnormal refrigerant circuit Remote controller transmission error
No sound
E1, E2
Remote controller control board error
No sound
No corresponding
Remarks
[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)
Wireless remote controller Beeper sounds/OPERATION
INDICATOR lamp blinks (Number of times)
1
2 3 4
5
6
7 8 9 10
11
12 13 14
Wired remote controller Check code
Symptom
E9
UP U3,U4
UF
U2
U1,Ud (UD)*
U5 U8 U6 U7
U9,UH
Others
Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit) Compressor overcurrent interruption Open/short of outdoor unit thermistors Compressor overcurrent interruption (When compressor locked) Abnormal high discharge temperature/49C operated/ insufficient refrigerant Abnormal high pressure (63H operated)/Overheating protection operation Abnormal temperature of heat sink Outdoor unit fan protection stop Compressor overcurrent interruption/Abnormal of power module Abnormality of super heat due to low discharge temperature Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit/Current sensor error Other errors (Refer to the technical manual for the outdoor unit.)
Remarks For details, check the LED display of the outdoor controller board. As for outdoor unit, refer to outdoor unit’s service manual.
Notes: 1. If the beeper does not sound again after the initial 2 beeps to
confirm the self-check start signal was received and the OPERATION INDICATOR
lamp
does not come on, there are no error records. 2. If the beeper sounds 3 times
continuously “beep, beep, beep (0.4 + 0.4 + 0.4 seconds)” after the initial 2
beeps to confirm the self-check start signal
was received, the specified refrigerant address is incorrect.
TCH117
12
· On wireless remote controller The continuous buzzer sounds from receiving
section of indoor unit. Blink of operation lamp
· On wired remote controller Check code displayed in the LCD.
- The check code in the parenthesis indicates PAR-41MAA model.
If the unit cannot be operated properly after test run, refer to the following table to find the cause.
Symptom Wired remote controller
LED 1, 2 (PCB in outdoor unit)
Cause
Please Wait
Please Wait Check code
Display messages do not appear even when operation switch is turned ON
(operation lamp does not light up).
For about 3 minutes after power-on
After LED 1, 2 are lit, LED 2 is turned · For about 3 minutes following power- on, operation
off, then only LED 1 is lit.
of the remote controller is not possible
(Correct operation)
due to system startup. (Correct operation)
Only LED 1 is lit.
Subsequent to
LED 1, 2 blink.
about 3 minutes
after power-on Only LED 1 is lit.
LED 1 blinks twice,
LED 2 blinks once.
· Connector for the outdoor unit’s protection device is not connected. ·
Reverse or open phase wiring for the outdoor unit’s power terminal block (L1,
L2, GR).
· Incorrect wiring between indoor and outdoor units (incorrect polarity of S1,
S2, S3) · Remote controller wire short
On the wireless remote controller with condition above, following phenomena take place. · No signals from the remote controller can be received. · Operation lamp is blinking. · The buzzer makes a short ping sound.
Note: Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)
For description of each LED (LED1, 2, 3) provided on the indoor controller, refer to the following table.
LED1 (power for microprocessor)
Indicates whether control power is supplied. Make sure that this LED is always lit.
LED2 (power for remote controller) LED3 (communication between indoor and outdoor units)
Indicates whether power is supplied to the remote controller. This LED lights
only in the case of the indoor unit which is connected to the outdoor unit
refrigerant addresses “0”.
Indicates state of communication between the indoor and outdoor units. Make
sure that this LED is always blinking.
TCH117
13
9-3. SELF-DIAGNOSIS ACTION TABLE
Note: Errors to be detected in outdoor unit, such as codes starting with F, U or E (excluding E0 to E7), are not covered in this document. Please refer to the outdoor unit’s service manual for the details.
Check code Abnormal point and detection method
Room temperature thermistor (TH1)
The unit is in 3-minute resume
prevention mode if short/open of
thermistor is detected. Abnormal if
the unit does not reset normally after
3 minutes. (The unit returns to normal
operation, if it has been reset nor-
mally.)
Constantly detected during cooling,
drying, and heating operation.
Short: 90°C [194°F] or more
P1
Open: -40°C [-40°F] or less
Cause Defective thermistor characteristics
Contact failure of connector (CN20) on the indoor controller board (Insert
failure) Breaking of wire or contact failure of thermistor wiring Defective
indoor controller board
Pipe temperature thermistor/Liquid
(TH2)
The unit is in 3-minute resume
prevention mode if short/open of
thermistor is detected. Abnormal if
the unit does not reset normally after
3 minutes. (The unit returns to normal
operation, if it has been reset nor-
mally.)
P2
Constantly detected during cooling,
drying, and heating (except defrost-
ing) operation
Short: 90°C [194°F] or more
Open: -40°C [-40°F] or less
Defective thermistor characteristics Contact failure of connector (CN44) on
the indoor controller board (Insert failure) Breaking of wire or contact
failure of thermistor wiring Defective refrigerant circuit is causing
thermistor temperature of 90°C [194°F] or more or -40°C [-40°F] or less.
Defective indoor controller board
Contact failure of drain float switch
Contact failure of connector
(CN4F)
(Insert failure)
· Extract when the connector of drain float
P4
switch is disconnected.
Defective indoor controller
( and of connector CN4F is not short- board
circuited.)
· Constantly detected during operation
Countermeasure
Check resistance value of thermistor. 32°F [0°C]……15.0 k 50°F [10°C]……9.6 k
68°F [20°C]……6.3 k 86°F [30°C]……4.3 k
104°F [40°C]……3.0 k If you put force on (draw or bend) the lead wire with
measuring resistance value of thermistor, breaking of wire or contact failure
can be detected.
Check contact failure of connector (CN20) on the indoor controller board.
Refer to “9-7. TEST POINT DIAGRAM”. Turn the power on again and check restart
after inserting connector again. Check room temperature display on remote
controller. Replace indoor controller board if there is abnormal difference
with actual room temperature. Turn the power off, and on again to operate
after check.
Check resistance value of thermistor. For characteristics, refer to (P1)
above.
Check contact failure of connector (CN44) on the indoor controller board.
Refer to “9-7. TEST POINT DIAGRAM”. Turn the power on and check restart after
inserting connector again. Check pipe
Check contact failure of float switch connector. Turn the power on again and
check after inserting connector again. Operate with connector (CN4F) short-
circuited. Replace indoor controller board if abnormality reappears.
Drain overflow protection operation
Malfunction of drain pump
Check if drain-up machine works.
Suspensive abnormality, if drain float
Defective drainage
Check drain function.
switch is detected to be underwater for 1 Clogged drain pump
minute and 30 seconds continuously with Clogged drain pipe
drain pump on.
Defective drain float switch
Remove drain float switch connector CN4F
Compressor and indoor fan will be turned Catch of drain float switch or
and check if it is short (Switch On) with the
off.
malfunction of moving parts
moving part of float switch UP, or OPEN with
Drain pump is abnormal if the condition
cause drain float switch to be
the moving part of float switch down.
above is detected during suspensive
detected under water (Switch
Replace float switch if it is short with the
P5
abnormality.
On)
moving part of float switch down.
Constantly detected during drain pump
Defective indoor-controller
Replace indoor controller board if it is short-
operation
board
circuited between of the drain float
switch connector CN4F and abnormality
reappears.
It is not abnormal if there is no problem about the above-mentioned . Turn the power off, and on again to operate after check.
TCH117
14
Check code Abnormal point and detection method
Freezing/overheating protection is working
Freezing protection (Cooling mode) The unit is in 6-minute resume prevention
mode if pipe <liquid or condenser/ evaporator> temperature stays under -15°C
[-5°F] for 3 minutes, 3 minutes after the compressor started. Abnormal if it
stays under -15°C [-5°F] for 3 minutes again within 16 minutes after 6-minute
resume prevention mode.
Cause
(Cooling or drying mode) Clogged filter (reduced airflow) Short cycle of air
path Low-load (low temperature) operation out of the tolerance range Defective
indoor fan motor
· Fan motor is defective. · Indoor controller board is
defective.
Countermeasure (Cooling or drying mode)
Check clogs of the filter. Remove shields.
Refer to “9-6. HOW TO CHECK THE PARTS”.
Defective outdoor fan control Overcharge of refrigerant Defective refrigerant circuit (clogs)
Check outdoor fan motor. Check operating condition of refrigerant circuit.
P6
Overheating protection (Heating mode) The unit is in 6-minute resume prevention mode if pipe <liquid or condenser/evaporator> temperature
(Heating mode) Clogged filter (reduced airflow) Short cycle of air path
(Heating mode) Check clogs of the filter.
Remove shields.
is detected as over 70°C [158°F] after
Overload (high temperature)
the compressor started. Abnormal if
operation out of the toler-
the temperature of over 70°C [158°F]
ance range
is detected again within 30 minutes
Defective indoor fan motor
Refer to “9-6. HOW TO CHECK THE PARTS”.
after 6-minute resume prevention
· Fan motor is defective.
mode.
· Indoor controller board is
defective.
Defective outdoor fan control Check outdoor fan motor.
Overcharge of refrigerant
Check operating condition of refrigerant cir-
Defective refrigerant circuit
cuit.
(clogs)
Bypass circuit of outdoor unit
is defective.
Pipe temperature
Slight temperature difference Check pipe <liquid or condenser/evaporator>
between indoor room
temperature with room temperature display
Detected as abnormal when the pipe
temperature and pipe <liquid
on remote controller and outdoor controller
temperature is not in the cooling range
or condenser/evaporator>
circuit board.
3 minutes after compressor start and 6
temperature thermistor
Pipe <liquid or condenser/evaporator> tem-
minutes after the liquid or condenser/
· Shortage of refrigerant
perature display is indicated by setting SW2
evaporator pipe is out of cooling range.
· Disconnected holder of
of outdoor controller circuit board as follows.
Note 1: It takes at least 9 minutes to
pipe <liquid or condenser/
detect. Note 2: Abnormality P8 is not detected in
drying mode. Cooling range: -3°C [-5.4°F] ] (TH-TH1)
evaporator> thermistor · Defective refrigerant circuit Reverse connection of extension pipe (on plural
( ) Conduct temperature check with outdoor controller circuit board after connecting `A-Control Service Tool(PAC-SK52ST)’.
TH: Lower temperature between liquid
units connection)
pipe temperature (TH2) and con-
Reverse wiring of indoor/
denser/evaporator temperature (TH5) outdoor unit connecting wire
P8
TH1: Intake temperature
(on plural units connection)
Check reverse connection of extension pipe or reverse wiring of indoor/outdoor unit connecting wire.
Defective detection of indoor
When 10 seconds have passed after the room temperature and pipe
compressor starts operation and the hot
<condenser/evaporator>
adjustment mode has finished, the unit is temperature thermistor
detected as abnormal when condenser/
Stop valve is not opened
evaporator pipe temperature is not in
completely.
heating range within 20 minutes.
Note 3: It takes at least 27 minutes to detect abnormality.
Note 4: It excludes the period of defrosting. (Detection restarts when
defrosting mode is over.)
Heating range: 3°C [5.4°F] [ (TH5-TH1)
TCH117
15
Check code Abnormal point and detection method
Pipe temperature thermistor/
Condenser-Evaporator (TH5)
The unit is in 3-minute resume protec-
tion mode if short/open of thermistor is
detected. Abnormal if the unit does not
get back to normal within 3 minutes. (The
unit returns to normal operation, if it has
been reset normally.)
Constantly detected during cooling,
drying, and heating operation (except
defrosting)
P9
Short: 90°C [194°F] or more Open: -40°C [-40°F] or less
Abnormal refrigerant circuit
During Cooling, Drying, or Auto Cooling
operation, the following conditions are
regarded as failures when detected for 1
second.
a)The compressor continues to run for 30
or more seconds.
b)The liquid pipe temperature or the
PL
condenser/evaporator temperature is
75°C [167°F] or more.
These detected errors will not be
cancelled until the power source is
reset.
Cause
Countermeasure
Defective thermistor characteristics Contact failure of connector (CN44) on
the indoor controller board (Insert failure) Breaking of wire or contact
failure of thermistor wiring Temperature of thermistor is 90°C [194°F] or more
or -40°C [-40°F] or less caused by defective refrigerant circuit.
Defective indoor controller board
Check resistance value of thermistor. For characteristics, refer to (P1).
Check contact failure of connector (CN44) on the indoor controller board.
Refer to “9-7. TEST POINT DIAGRAM”.
Turn the power on and check restart after inserting connector again. Operate
in test run mode and check pipe <condenser/evaporator> temperature with
outdoor controller circuit board. If pipe <condenser/evaporator> temperature
is extremely low (in cooling mode) or high (in heating mode), refrigerant
circuit may have defect. Operate in test run mode and check pipe
<condenser/evaporator> temperature with outdoor control circuit board. If
there is extreme difference with actual pipe <condenser/evaporator>
temperature, replace indoor controller board. There is no abnormality if none
of above comes within the unit. Turn the power off and on again to operate.
( ) In case of checking pipe temperature with outdoor controller circuit
board, be sure to connect A-control service tool (PAC-SK52ST).
Abnormal operation of 4-way valve Disconnection of or leakage in refrigerant
pipes Air into refrigerant piping
Abnormal operation (no rotation) of indoor fan · Defective fan motor. ·
Defective indoor control
board. Defective refrigerant circuit (clogging)
When this error occurs, replace the 4-way valve. Check refrigerant pipes for
disconnection or leakage. After the recovery of refrigerant, vacuum dry the
whole refrigerant circuit. Refer to “9-6-2. DC fan motor (fan motor/ indoor
controller circuit board”.
Check refrigerant circuit for operation. To avoid entry of moisture or air
into refrigerant circuit which could cause abnormal high pressure, purge air
in refrigerant circuit or replace refrigerant.
Remote controller transmission error(E0)/signal receiving error(E4)
Abnormal if main or sub remote controller cannot receive any transmission
normally from indoor unit of refrigerant address “0” for 3 minutes. (Check
code: E0) Abnormal if sub remote controller could not receive any signal for 2
minutes. (Check code: E0)
Contact failure at transmission wire of remote controller All remote controllers are set as “sub” remote controller. In this case, E0 is displayed on remote controller, and E4 is displayed at LED (LED1, LED2) on the outdoor controller circuit board. Miswiring of remote controller
Check disconnection or looseness of indoor unit or transmission wire of remote
controller. Set one of the remote controllers “main” if there is no problem
with the action above. Check wiring of remote controller. · Total wiring
length: maximum 500 m
(Do not use cable with 3 or more cores.) · The number of connecting indoor
units:
maximum 16 units · The number of connecting remote control-
ler: maximum 2 units
E0 or E4
Abnormal if indoor controller board cannot receive any data normally from remote controller board or from other indoor controller board for 3 minutes.
When it is not the above-mentioned problem of
Defective transmitting receiving Diagnose remote controllers.
circuit of remote controller
a) When “OK” is displayed,
(Check code: E4) Indoor controller board cannot receive any signal from remote controller for 2 minutes. (Check code: E4)
Defective transmitting receiving circuit of indoor controller board of refrigerant addresses “0”. Noise has entered into the transmission wire of remote
Remote controllers have no problem. Turn the power off, and on again to check. If abnormality occurs again, replace indoor controller board. b) When “NG” is displayed, Replace remote controller.
controller.
c)When “E3” or “ERC” is displayed, noise
may be causing abnormality.
Note:
If the unit is not normal after replacing indoor
controller board in group control, indoor control-
ler board of address “0” may be abnormal.
TCH117
16
Check code Abnormal point and detection method
Remote controller transmission
error(E3)/signal receiving error(E5)
Abnormal if remote controller could not find blank of transmission path for 6 seconds and could not transmit. (Check code: E3)
Remote controller receives transmitted
data at the same time and compares the
received and transmitted data. Abnormal
E3
if these data are judged to be different
or
30 continuous times. (Check code: E3)
E5
Abnormal if indoor controller board could not find blank of transmission path. (Check code: E5)
Indoor controller board receives transmitted data at the same time and compares the received and transmitted data. Abnormal if these data are judged to be different 30 continuous times. (Check code: E5)
Indoor/outdoor unit communication
error (Signal receiving error)
Abnormal if indoor controller board
cannot receive any signal normally for 6
minutes after turning the power on.
Abnormal if indoor controller board
cannot receive any signal normally for 3
minutes.
E6
Consider the unit abnormal under the
following condition: When 2 or more
indoor units are connected to an
outdoor unit, indoor controller board
cannot receive a signal for 3 minutes
from outdoor controller circuit board, a
signal which allows outdoor controller
circuit board to transmit signals.
Cause
Countermeasure
2 remote controllers are set as “main.” (In case of 2 remote controllers) Remote controller is connected with 2 indoor units or more. Repetition of refrigerant address Defective transmitting receiving circuit of remote controller Defective transmitting receiving circuit of indoor controller board Noise has entered into transmission wire of remote controller.
Set a remote controller to main, and the other to sub.
Remote controller is connected with only one indoor unit. The address changes
to a separate setting.
Diagnose remote controller. a) When “OK” is displayed, remote control-
lers have no problem. Turn the power off,and on again to check. When becoming
abnormal again, replace indoor controller board. b) When “NG” is displayed,
replace remote controller. c) When “E3” or “ERC” is displayed, noise may be
causing abnormality.
Check LED display on the outdoor control
circuit board. (Connect A-control service
tool, PAC-SK52ST.)
Refer to outdoor unit service manual.
Contact failure, short circuit or, Check disconnection or looseness of indoor/
miswiring (reverse wiring) of indoor/outdoor unit connecting wire
outdoor unit connecting wire of indoor unit or outdoor unit. Check all the units in case of twin triple indoor unit system.
Defective transmitting receiving Turn the power off, and on again to
circuit of indoor controller board
check. If abnormality occurs again,
Defective transmitting receiving
replace indoor controller board or outdoor
circuit of indoor controller board Noise has entered into indoor/
controller circuit board. Note: Other indoor controller board may have defect
outdoor unit connecting wire. in the case of twin triple indoor unit system.
E7
Fb (FB)*
Indoor/outdoor unit communication error (Transmitting error) Abnormal if “1” receiving is detected 30 times continuously though indoor controller board has transmitted “0”.
Defective transmitting receiving circuit of indoor controller board Noise has entered into power supply. Noise has entered into outdoor control wire.
Turn the power off, and on again to check. If abnormality occurs again, replace indoor controller board.
Indoor controller board Abnormal if data cannot be read normally from the nonvolatile memory of the indoor controller board.
Defective indoor controller board
Replace indoor controller board. * The check code in the parenthesis indicates
PAR-41MAA model.
Remote controller control board
Abnormal if data cannot be read normally from the nonvolatile memory of the
remote controller control board. (Check code: E1)
Defective remote controller
Abnormal if the clock function of remote controller cannot be operated
normally. (Check code: E2) E1
or
E2
Replace remote controller.
TCH117
17
Check code Abnormal point and detection method
Forced compressor stop
(due to water leakage abnormality)
The unit has a water leakage abnormal-
ity when the following conditions, a)
and b), are satisfied while the above-
mentioned detection is performed.
a) The intake temperature subtracted with
liquid pipe temperature detects to be
less than -10°C [14°F] for a total of
30 minutes. (When the drain sensor
is detected to be NOT soaked in the
water, the detection record of a) and b)
will be cleared.)
b) Drain float switch detects to be in the
PA
water for more than 15 minutes.
Note:
Once the water leakage abnormality is
detected, abnormality state will not be
released until the main power is reset.
Cause Drain pump trouble
Defective drainage · Drain pump clogging · Drain pipe clogging
Open circuit of float switch
Contact failure of float switch connector
Dew condensation on float switch · Drain water trickles down
lead wire. · Drain water ripples due to
filter clogging.
Extension piping connection difference at twin, triple or quadruple system
Countermeasure Check the drain pump. Check whether water can be drained.
Check the resistance of the float switch. Check the connector contact failure.
Check the float switch leadwire mounted. Check the filter clogging.
Check the piping connection.
Fan motor trouble Pb
Miswiring of indoor/outdoor connecting at twin, triple or quadruple system Room temperature thermistor/ liquid pipe temperature thermistor detection is defective.
Check the indoor/outdoor connecting wires.
Check the room temperature display of remote controller. Check the indoor
liquid pipe temperature display of outdoor controller board.
Defective fan motor Defective indoor controller board Contact failure of fan motor connector
– Refer to “9-6-2. DC Fan Motor (fan motor/ indoor controller board)”.
TCH117
18
9-4. TROUBLESHOOTING OF PROBLEMS
Note: Refer to the outdoor unit’s service manual for the detail of remote controller.
Phenomena
(1)LED2 on indoor controller board is off.
Cause
· When LED1 on indoor controller board is also off. Power supply of rated
voltage is not supplied to outdoor unit.
Defective outdoor controller circuit board
Power supply of 208/230 V is not supplied to indoor unit.
Defective indoor controller board
· When LED1 on indoor controller board is lit. Mis-setting of refrigerant
address for outdoor unit (There is no unit corresponding to refrigerant
address “0”.)
(2)LED2 on indoor controller board is blinking.
· When LED1 on indoor controller board is also blinking. Connection failure of indoor/outdoor unit connecting wire
Countermeasure
Check the voltage of outdoor power supply terminal block (L1, L2). · When
208/230 V AC is not detected,
check the power wiring to outdoor unit and the breaker. · When 208/230 V AC is
detected, check
(below). Check the voltage between outdoor terminal block S1 and S2. · When
208/230 V AC is not detected,
–check the fuse on outdoor controller circuit board. –check the wiring
connection. · When 208/230 V AC is detected, check
(below). Check the voltage between indoor terminal block S1 and S2. · When
208/230 V AC is not detected,
check indoor/outdoor unit connecting wire for miswiring. · When 208/230 V AC
is detected, check (below). Check the fuse on indoor controller board. Check
the wiring connection. If no problem is found, indoor controller board is
defective.
Check again the setting of refrigerant address for outdoor unit. Set the
refrigerant address to “0”. (For grouping control system under which 2 or more
outdoor units are connected, set one of the units to “0”.) Set refrigerant
address using SW1 (3-6) on outdoor controller circuit board.
Check indoor/outdoor unit connecting wire for connection failure.
· When LED1 is lit. Miswiring of remote controller wires Under twin or triple
indoor unit system, 2 or more indoor units are wired together.
Refrigerant address for outdoor unit is wrong or not set. Under grouping
control system, there are some units whose refrigerant addresses are 0.
Short-circuit of remote controller wires Defective remote controller
Check the connection of remote controller wires in case of twin triple indoor
unit system. When 2 or more indoor units are wired in one refrigerant system,
connect remote controller wires to one of those units. Check the setting of
refrigerant address in case of grouping control system. If there are some
units whose refrigerant addresses are 0 in one group, set one of the units to
0 using SW1 (3-6) on outdoor controller circuit board.
Remove remote controller wires and check LED2 on indoor controller board. ·
When LED2 is blinking, check the shortcircuit of remote controller wires. ·
When LED2 is lit, connect remote controller wires again and: if LED2 is
blinking, remote controller is defective; if LED2 is lit, connection failure
of remote controller terminal block, etc. has returned to normal.
TCH117
19
Phenomena (3)Upward/downward vane
performance failure
(4)Receiver for wireless remote controller
Note: Refer to the outdoor unit’s service manual for the detail of remote controller.
Cause The vane is not downward during defrosting and heat preparation and when
the thermostat is OFF in HEAT mode. (Working of COOL protection function) Vane
motor does not rotate. · Defective vane motor · Breaking of wire or connection
failure of connector
Upward/downward vane does not work. · The vane is set to fixed position.
Weak batteries of wireless remote controller
Contact failure of connector (CNB) on wireless remote controller board (Insert
failure) Contact failure of connector (CN90) on indoor controller board
(Insert failure) Contact failure of connector between wireless remote
controller board and indoor controller board
Countermeasure Normal operation (The vane is set to horizontal regardless of
remote control.)
Check (left). · Check the vane motor. (Refer to 9-6.
HOW TO CHECK THE PARTS.) · Check for breaking of wire or connection
failure of connector. Normal operation (Each connector on vane motor side is
disconnected or setting the fixed vanes by wired remote controller.) Replace
batteries of wireless remote controller.
Check contact failure of each connector. If no problems are found of
connector,
replace indoor controller board. When the same trouble occurs even if indoor
controller board is replaced, replace wireless remote controller board.
TCH117
20
9-5. EMERGENCY OPERATION
9-5-1. When wireless remote controller fails or its battery is exhausted
CD
When the remote controller cannot be used When the batteries of the remote
controller run out or the remote controller malfunctions, the emergency
operation can be done using the emergency buttons on the grille.
STANDBY lamp OPERATING lamp Emergency operation cooling switch Emergency
operation heating switch Receiver
Starting operation · To operate the cooling mode, press the button for more than 2 seconds. B · To operate the heating mode, press the button for more than 2 seconds. A · Lighting of the OPERATING lamp means the start of operation.
Note:
E
Details of emergency mode are as shown below.
Details of EMERGENCY MODE are as shown below.
Operation mode
COOL
HEAT
Set temperature
24°C [75°F]
24°C [75°F]
Fan speed Airflow direction
High Horizontal (Step 1)
High Downward (Step 5)
Stopping operation · To stop operation, press the button or the button for more than 2 seconds.
9-5-2. When wired remote controller or indoor unit microprocessor fails
1. When the wired remote control or the indoor unit microprocessor has
failed, but all other components work properly, Setting the switch (SWE) on
the indoor controller board ON will begin the indoor unit Emergency Operation.
When Emergency Operation is activated, the indoor unit operates as follows:
(1) Indoor fan is running at high speed. (2) Drain pump is working. (option)
Note on the wireless remote control When the remote control does not function,
it is possible to activate Emergency Operation by using the indoor unit
Emergency Operation switch. However, if the indoor unit microprocessor has
failed, it is nesessary to proceed with points 2 and 3 below as in the case of
the wired remote control.
2. When you activate Emergency Operation of the cooling or heating, you have
to set the switch (SWE) on the indoor controller board and activate Emergency
Operation of the outdoor unit. For details on how to activate Emergency
Operation of the outdoor unit, refer to the outdoor unit wiring diagram.
3. Before you activate Emergency Operation, check the following points: (1)
Emergency Operation cannot be activated when: · the outdoor unit malfunctions.
· the indoor fan malfunctions. · it has detected the malfunction of drain-up
machine during self-diagnosing. (2) Emergency Operation becomes continuous
only by switching the power source on/off. ON/OFF on the remote control or
temperature control, etc. does not function. (3) Avoid operating for a long
time when the outdoor unit begins defrosting while Emergency Operation of the
heating is activated, because it will start to blow cold air. (4) Emergency
cooling should be limited to 10 hours maximum (The indoor unit heat exchanger
may freeze). (5) After Emergency Operation has been deactivated, set the
switches, etc. to their original positions. (6) Movement of the vanes does not
work in Emergency Operation, therefore you have to slowly set them manually to
the appropriate position.
TCH117
21
9-6. HOW TO CHECK THE PARTS
Parts name
Checkpoints
Room temperature thermistor (TH1)
Disconnect the connector then measure the resistance with a multimeter.
Pipe temperature thermistor/liquid(TH2)
Refer to “9-6-1. Thermistor”.
Condenser/evaporator temperature thermistor (TH5)
Vane motor (Upper MV1) Measure the resistance between the terminals with a multimeter.
7 Sky Blue 9 Sky Blue
(At the ambient temperature 25°C [77°F])
M
Normal
10 Red
Connector(CNV) pin No.
Sky Sky Blue Blue
68
Red-Sky Blue Red-Sky Blue Red-Sky Blue Red-Sky Blue
300 ± 7%
Vane motor (Lower MV2) Measure the resistance between the terminals with a multimeter.
2 Sky Blue 4 Sky Blue
(At the ambient temperature 25°C [77°F])
M
Normal
5 Red
Connector(CNV) pin No.
Sky Sky Blue Blue
13
Red-Sky Blue Red-Sky Blue Red-Sky Blue Red-Sky Blue 300 ± 26.3
Fan motor (MF)
Refer to “9-6-2. DC Fan motor (fan motor/indoor controller circuit board)”.
9-6-1. Thermistor
Thermistors for lower temperature
Room temperature thermistor (TH1) Pipe temperature thermistor/liquid (TH2) Condenser/evaporator temperature thermistor (TH5)
Thermistor R0=15k ± 3% Fixed number of B=3480 ± 2%
t( )Rt=15exp { 3480( 1 273+t
1 )} 273
1
1
273+
T-32 1.8
273
32°F [0°C] 50°F [10°C] 68°F [20°C] 77°F [25°C] 86°F [30°C] 104°F [40°C]
15 9.6 6.3 5.4 4.3 3.0
Resistance (k”)
< Thermistor for lower temperature > 50 40 30 20 10 0 -20 -10 0 10 20 30 40 50 (°C) -4 -14 32 50 68 86 104 122 (°F) TemperatureTCH117
22
9-6-2. DC Fan motor (fan motor/indoor controller circuit board)
Check method of DC fan motor (fan motor/indoor controller circuit board) Notes
· High voltage is applied to the connector (CNMF) for the fan motor. Pay
attention to the service. · Do not pull out the connector (CNMF) for the motor
with the power supply on. (It causes trouble of the indoor controller circuit
board and fan motor.) Self check Symptom : The indoor fan cannot rotate.
Wiring contact check Contact of fan motor connector (CNMF)
Yes Is there contact failure?
No
Correct the wiring.
Power supply check (Remove the connector (CNMF))
Measure the voltage in the indoor controller circuit board. TEST POINT : VDC
(between 1 (+) and 4 (-) of the fan connector): VDC 294-325 V DC TEST POINT :
VCC (between 5 (+) and 4 (-) of the fan connector): VCC 15 V DC
No Is the voltage normal?
Yes
Replace the indoor controller board.
OK Check the operation.
Fail Replace the defective fan motor.
Complete.
Sensor signal check
Measure the voltage between CNMF and 0 V DC and 15 V DC in the indoor
controller circuit board.
Does the voltage repeat 0 V DC and 15 V DC?
Yes
Replace the indoor controller board.
OK Check the operation.
Fail Replace the defective fan motor.
No Complete.
Replace the defective fan motor.
Yes OK
Check the operation of fan.
Fail
Replace the indoor controller board.
Complete.
Symptom: The fan motor does not stop when pressing the stop button on the
remote controller. The fan motor starts to rotate when turning on the breaker.
Process: The connector for emergency operation on the indoor controller board
is possibly set to ON. Check the setting of SWE. Set SWE to OFF if it is set
to ON.
TCH117
23
9-7. TEST POINT DIAGRAM Indoor controller board
CN2L Connector (LOSSNAY)
CNP Drain pump output 13: 13 VDC (option)
LED1: Power supply (I.B)
CN105 IT Terminal
CN4F Float switch (FS) (option)
CN41 Connector (HA terminal-A)
SWE Emergency operation connector
CN51 Centrally control
CN32 Remote switch
LED3: Transmission (Indoor/Outdoor)
SW1 Model selection
SW2 Capacity setting
CNMF Connect to the fan motor (MF) 14 : 294-325 VDC 54 : 15 V DC 64 : 06.5
VDC 74 : 0 or 15 VDC
CN01 Connect to the Terminal block (TB4) 13 : 208/230 V AC
FUSE (3.15 A 250 V)
CN3C Transmission (Indoor/outdoor) (028 VDC)
CN44 Pipe temperature thermistor 12 : Liquid (TH2) 34 : Condenser/
Evaporator(TH5)
CN90 Connect to the remote operation adapter
CN22 Connect to the terminal block (TB5) (Remote controller connecting wire)
(option)
Jumper wire J41,J42 Pair No. setting for wireless remote controller
LED2: Power supply (Wired remote controller)
CNV Vane motor (MV1, MV2) 12 VDC pulse outlet
CN20 Room temp. thermistor (TH1)
CNRU Connect to SWITCH BOARD (S.B), LED BOARD (L.B) and PCB for WIRELESS REMOTE CONTROLLER (option)
TCH117
24
9-8. FUNCTIONS OF DIP SWITCH AND JUMPER WIRE
Each function is controlled by the DIP switch and the jumper wire on the
indoor controller board.
The black square () indicates a switch position.
Jumper wire Functions
Setting by the DIP switch and jumper wire
Remarks
SW1
Model settings
MODELS PKA-ALA1
SETTING
123456 ON OFF
SW2
Capacity settings
MODELS PKA-A12LA1
PKA-A18LA1
SETTING
123456 ON OFF
123456 ON OFF
Pair number
J41 J42
setting with wireless remote
controller
Wireless remote Control PCB setting
controller setting J41
J42
0
1
2
39
Jumper wire ( : Short : Open)
TCH117
25
10 FUNCTION SETTING
UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER
Each function can be set as necessary using the remote controller. The setting
of function for each unit can only be done by the remote controller. (1)
Functions available when setting the unit number to “Grp.”
Refer to the service manual that comes with each outdoor unit. (2) Functions
available when setting the unit numbers to 1-4 or “All” (07 in case of
wireless remote controller)
Function
Settings
Filter sign
Fan speed
Fan speed during the cooling thermostat is OFF
100 Hr 2500 Hr No filter sign indicator Silent Standard High ceiling Setting fan speed Stop Extra low
Mode No. 07 08 27
Setting No. 1 2 3 1 2 3 1 2 3
Initial setting
Setting
TCH117
26
11 SPECIAL FUNCTION
11-1. ROTATION FUNCTION(AND BACK-UP FUNCTION, 2ND STAGE CUT-IN FUNCTION)
Connect optional wired remote controller through Terminal Block kit (PAC- SH29TC-E) to PKA type.
11-1-1. Operation
(1) Rotation function (and Back-up function)
· Outline of functions
· Main and sub unit operate alternately according to the interval of rotation setting.
Main and sub unit should be set by refrigerant address. (Outdoor DIP switch setting)
Refrigerant address”00″
Main unit
Refrigerant address”01″
Sub unit
· When an error occurs to one unit, another unit will start operation. (Back- up function)
· System constraint
· This function is available only by the grouping control system(INDOOR UNIT : OUTDOOR UNIT=1:1) of 2 refrigerant
groups. (Refer to Fig. 1)
· Main indoor unit should be connected for wired remote controller and the transmission line (TB5) for main and sub unit
should also be connected. (Refer to Fig. 1)
(This function cannot be set by wireless remote controller.)
· Set refrigerant address of each unit. (DIP switch on the outdoor unit···Refrigerant address 00/01)
Operation pattern
1 [Back-up function only]··· Request code number “312”
Main unit IC-1
Start operation Run
Error occurs on main unit. Main Sub
Abnormal condition
Fig. 1 Refrigerant address Refrigerant address
“00”
“01”
Main unit
OC-1 3(2)
OC-2 Sub
3(2) unit
Sub
unit
Stop
Run
IC-2
2 [Rotation function] & [Back-up function]··· Request code number “313318”
Main unit IC-1
Start operation Main Run
Sub Main Stop
Error occurs on main unit. Sub Main Sub
Abnormal condition Run
IC-1
IC-2
2
2
RC
OC : Outdoor unit IC : Indoor unit RC : Wired remote controller
Sub
unit
Stop
Run
Stop
Run
IC-2
128 days
128 days
(Ex:When the request code number is “313”, each unit operates alternately in daily cycle.)
Note: · When the unit is restarted to operate after turning off the power or
operation OFF status, the unit which was operating will
start operation. · To operate the main unit, refer to “11-1-2. How to set
rotation function(Back-up function, 2nd stage cut-in function)” and set
the request code No. which is not the same as the current one, then set again
the former request code No.
(2) 2nd stage cut-in function · Outline of functions
· When the 1st unit CANNOT supply sufficient capacity for exceptionally high-
demand conditions and the actual room temperature reaches set point(), the
2nd unit starts operation in conjunction with the 1st unit.
· Once the actual room temperature goes down to 4°C [7.2°F] below set
point(), the 2nd unit stops operation automatically. (* set point = set
temperature by R/C (remote controller) + 4, 6, 8°C [7.2, 10.8, 14.4°F]
(selectable) )
· Number of operating units is determined according to the room temperature
and set point. · When room temperature reaches higher than set point, standby
unit starts. (2 units operation) · When room temperature falls below set point
-4°C [-7.2°F], standby unit stops. (1 unit operation)
TCH117
27
· System constraint · This function is available only in cooling mode.
Ex.) Set temp. by R/C = 20°C [68°F] Set point = 26°C [79°F] When request code number is “323”.
26°C [79°F] 22°C [71.5°F] 20°C [68°F]
2nd unit Cut-in
4°C [7.2°F] 2nd unit Cut-out
[2nd stage cut-in function]··· Request code number “322324”
Main unit IC-1
Room temp. ] Set point Start operation Sub unit start operation
Run
Room temp. < Set point -4°C [-7.2°F] Sub unit stop
Sub
unit
Stop
Run
IC-2
Stop
11-1-2. How to set rotation function(Back-up function, 2nd stage cut-in function) You can set these functions by wired remote controller.(Maintenance monitor)
NOTICE
Both main and sub unit should be set in same setting. Every time replacing
indoor controller board for servicing, the function should be set again.
(1) Request Code List
Rotation setting
Setting No. (Request code)
No.1 (310) No.2 (311) No.3 (312) No.4 (313) No.5 (314) No.6 (315) No.7 (316)
No.8 (317) No.9 (318)
Setting contents Monitoring the request code of current setting Rotation and
Back-up OFF (Normal group control operation)
Back-up function only Rotation ON (Alternating interval = 1day) and back-up
function Rotation ON (Alternating interval = 3days) and back-up function
Rotation ON (Alternating interval = 5days) and back-up function Rotation ON
(Alternating interval = 7days) and back-up function Rotation ON (Alternating
interval = 14days) and back-up function Rotation ON (Alternating interval =
28days) and back-up function
2nd unit cut-in setting
Setting No. (Request code)
No.1 (320) No.2 (321) No.3 (322) No.4 (323)
No.5 (324)
Setting contents Monitoring the request code of current setting
Cut-in function OFF Cut-in function ON (Set point = Set temp.+ 4:[7.2-F] Cut-
in function ON (Set point = Set temp.+ 6:[10.8-F] Cut-in function ON (Set
point = Set temp.+ 8:[14.4-F]
Initial setting
Initial setting
TCH117
28
11-2. BACK-UP HEATING FUNCTION
11-2-1. Operation
The back-up heater turns ON when both of the following conditions have been
satisfied: A) When the room temperature has not risen after the heater ON
delay time has passed.
Note: The heater ON delay time starts when the condition of “set temperature –
room temperature > 1°F [0.5:]” has been satisfied. B) Set temperature – room
temperature ] 3°F [1.5:]
The back-up heater turns OFF when the following condition has been satisfied:
· Set temperature – room temperature ] 1°F [0.5:]
Heater output ON
Set temp. – room temp. 1°F [0.5:]
The heater output turns ON when both the conditions A and B have been satisfied.
3°F [1.5:]
Heater output OFF
11-2-2. How to change the heater ON delay time
You can set these functions by wired remote controller. Note that the change
can be made only by the wired remote controller PAR-41MAA.
Notes: 1. Both main and sub unit should be set in the same setting. 2. Every
time replacing indoor controller board for service, the function should be set
again. 3. Stop the air-conditioner operation before changing the heater ON
delay time.
Request code list
Setting No. (Request code)
Setting contents
No.1
Monitoring the request
code of current setting
No.2 391
10 minutes
No.3 392
15 minutes
No.4 393
20 minutes
No.5 394
25 minutes
No.6 395
5 minutes
Initial setting
11-2-3. How to connect
When connecting to the connector CN24 of the indoor unit, use PAC-SE56RA-E
(optional parts). Note: For a twin indoor unit system, connect to the CN24 of
the indoor unit that the remote controller is connected to.
TCH117
29
12 DISASSEMBLY PROCEDURE
: Indicates the visible parts in the photos/figures.
OPERATION PROCEDURE
1. REMOVING THE PANEL
(1) Insert the driver to the hole at VANE LOWER shaft and slide the VANE LOWER
shaft (2 places each). Push VANE UPPER shaft with the driver.
(2) Pull the VANE LOWER and VANE UPPER from unit. (3) Remove 2 screw caps of
the front panel. Remove 2
screws. (See Photo 1) (4) Hold the lower part of both ends of the front panel
and pull
it slightly toward you, and then remove the front panel by pushing it upward.
(5) Remove the screw of the corner box. (See Photo 1) Remove the corner box.
Unlock the stopper and remove the horizontal vanes using following tool like a
screw driver.
Unlock
NOTE: Turn OFF the power supply before assembly. Be careful when removing
heavy parts.
PHOTOS/FIGURES
Photo 1 VANE UPPER shaft
VANE UPPER
VANE LOWER shaft
Front panel VANE LOWER
Screw of the Screws and screw caps corner box
Photo 2 Screw of electrical Hook
box cover (side)
Screw of electrical box cover (side)
Unlock
Water cover
Photo 3-1
Screw of electrical box cover (Front)
Connector for ground wire Fixture
2. REMOVING THE ELECTRICAL BOX
(1) Remove the panel and the corner box. (Refer procedure to 1) (2) Remove the
front and side electrical box covers (each 2
screw). (3) Disconnect the indoor/outdoor connecting wire from
terminal block (TB4). (4) Disconnect the wired remote controller connecting
wire
from terminal block. (5) Disconnect the connectors on the indoor controller
board. (6) Disconnect the connector for ground wire. (7) Remove the screw on
lower side of the electrical box.
(See Photo 3) (8) Push up the upper fixture catch to remove the box, then
remove it from the box fixture.
Photo 3-2
Electrical box
TCH117
Screw of electrical box
30
OPERATION PROCEDURE
3. REMOVING THE INDOOR CONTROLLER BOARD, THE WIRELESS REMOTE CONTROLLER BOARD
AND THE LED BOARD
(1) Remove the panel and the corner box. (Refer to procedure 1)
(2) Remove the front and side electrical box covers (each 2 screw).
(3) Disconnect the connectors on the indoor controller board. (See Photo 4)
(4) Remove the switch board holder and open the cover. (5) Pull out the indoor
controller board toward you then
remove the indoor controller board and switch board. (See Photo 4) (6) Remove
the holder of wireless remote controller board and LED board. (7) Disconnect
the connector of wireless remote controller board and LED board. (8) Remove
the wireless remote controller board and LED board from the holder.
PHOTOS/FIGURES
Photo 4
Holder of wireless remote controller board and LED board
Switch board holder (Holder of switch board)
Indoor controller board
Photo 5 (see the bottom)
Nozzle assembly
Vane motor unit
4. REMOVING THE NOZZLE ASSEMBLY (with VANE and VANE MOTOR) AND DRAIN HOSE
(1) Remove the panel and corner box. (Refer to procedure 1) (2) Remove the
electrical box covers. (Refer to procedure 2) (3) Disconnect the vane motor
connector (CNV) on the indoor
controller board. (4) Push fixture and pull out the drain hose from the nozzle
assembly, and remove nozzle assembly. (See Photo 6)
Drain hose
5. REMOVING THE VANE MOTOR
(1) Remove the nozzle assembly. (Refer to procedure 4) (2) Remove 2 screws of
the vane motor unit cover, and pull
out the vane motor unit. (3) Remove screw of the vane motor (LOWER). (4)
Remove the vane motor (LOWER) from the vane motor
unit cover. (5) Disconnect the connector (white) from the vane motor.
(LOWER) (6) Remove 2 screw of the vane motor (UPPER). (7) Remove the vane
motor (UPPER) from the vane motor
unit cover. (8) Disconnect the connector (blue) from the vane motor
(UPPER).
Photo 6 Screws of the vane motor (LOWER)
Fixture Drain hose
Screws of the vane motor unit cover
Photo 7
TCH117
Screws of the vane motor (UPPER)
31
OPERATION PROCEDURE
6. REMOVING THE INDOOR FAN MOTOR AND THE LINE FLOW FAN
(1) Remove the panel and the corner box. (Refer to procedure 1) (2) Remove the
electrical box (Refer to procedure 2) and the
nozzle assembly (Refer to procedure 4). (3) Remove the water cover. (See Photo
2) (4) Loosen the screw fixing the line flow fan. (See Photo 9) (5) Remove 3
screws fixing the motor bed. (See Photo 8) (6) Remove the motor bed together
with fan motor and motor
band. (7) Release the 2 hooks of the motor band. Remove the motor
band. Pull out the indoor fan motor. (8) Remove 2 screws fixing the left side
of the heat exchanger.
(See Photo 10) (9) Lift the heat exchanger, and pull out the line flow fan to
the
lower-left. * When attaching the line flow fan, screw the line flow fan so
4mm, 5/32 inch gap is provided between the right end of the line flow fan and
the right wall of the air passage of the box. (Photo 9)
PHOTOS/FIGURES
Photo 8
Lead wire of pipe thermistor
Motor band
Screws of the motor bed
Photo 9
Motor bed Screw of the line flow fan
Photo 10
Screws of the left side of the heat exchanger
4 mm, 5/32 inch
7. REMOVING THE PIPE TEMPERATURE THERMISTOR/LIQUID (TH2) AND COND./EVA. TEMP.
THERMISTOR (TH5)
(1) Remove the panel and the corner box. (Refer to procedure 1)
(2) Remove the electrical box covers. (Refer to procedure 2) (3) Remove the
water cover. (See Photo 2) (4) Remove the liquid pipe thermistor and gas pipe
thermistors. (5) Disconnect the connector (CN44) on the indoor controller
board. (TH2 and TH5/CN44)
Photo 11
Condenser/evaporator temp. thermistor (TH5)
Liquid pipe thermistor (TH2)
Connector for ground wire
TCH117
32
OPERATION PROCEDURE
8. REMOVING THE HEAT EXCHANGER
(1) Remove the panel and the corner box (Refer to procedure 1). (2) Remove the
electrical box (Refer to procedure 2) and the
nozzle assembly (Refer to procedure 4). (3) Remove the water cover. (4) Remove
the pipe thermistors. (Refer to procedure 7). (5) Remove the motor bed
together with fan motor and motor
band (Refer to procedure 6). (6) Remove 2 screws fixing the left side of the
heat exchanger.
(See Photo 10) (7) Remove the heat exchanger.
PHOTOS/FIGURES
Photo 12
Heat exchanger
Photo 13
Condenser/evaporator temp. thermistor (TH5)
Water cover Connector for ground wire
Liquid pipe thermistor (TH2)
9. REMOVING THE ROOM TEMPERATURE THERMISTOR
(1) Remove the panel and corner box. (Refer to procedure 1) (2) Remove the
electrical box covers. (Refer to procedure 2) (3) Remove the room temperature
thermistor. (4) Disconnect the connector (CN20) on the indoor controller
board.
Photo 14
Room temp. thermistor (TH1)
Indoor controller board
TCH117
33
13 REMOTE CONTROLLER
13-1. REMOTE CONTROLLER FUNCTIONS
The functions of the function buttons change depending on the screen. Refer to the button function guide that appears at the bottom of the LCD for the functions they serve on a given screen. When the system is centrally controlled, the button function guide that corresponds to the locked button will not appear.
MENU RETURN SELECT
ON
HOLD
OFF
Function buttons
Main display
Fri
Cool
Mode
Room 83 Set temp.
83
Temp.
Auto
Fan
7 890
Menu screen
Operation Vane·Louver·Vent. (Lossnay) High power Comfort
Main menu: RETURN Cursor
7 890
Main menu
Main Main menu Energy saving
7 890
Function guide
[ON/OFF] button Press to turn ON/OFF the indoor unit.
[SELECT/HOLD] button Press to save the setting. When the Main menu is
displayed, pressing this button will enable/disable the HOLD function.
[RETURN] button Press to return to the previous screen.
[MENU] button Press to bring up the Main menu.
Backlit LCD Operation settings will appear. When the backlight is off,
pressing any button turns the backlight on and it will stay lit for a certain
period of time depending on the screen.
When the backlight is off, pressing any button turns the backlight on and does
not perform its function. (except for the [ON/OFF] button)
ON/OFF lamp This lamp lights up in green while the unit is in operation. It
blinks while the remote controller is starting up or when there is an error.
Function button [F1] Main display: Press to change the operation mode. Menu
screen: The button function varies with the screen.
Function button [F2] Main display: Press to decrease temperature. Main menu:
Press to move the cursor left. Menu screen: The button function varies with
the screen.
Function button [F3] Main display: Press to increase temperature. Main menu:
Press to move the cursor right. Menu screen: The button function varies with
the screen.
Function button [F4] Main display: Press to change the fan speed. Menu screen:
The button function varies with the screen.
TCH117
34
Display
The main display can be displayed in two different modes: “Full” and “Basic”. The initial setting is “Full”. To switch to the “Basic” mode, change the setting on the Main display setting. (Refer to operation manual included with remote controller.)
$
2345 6 7
8
$
2
6
7
8 90
Room 83
Cool Set temp.
1
83
1
Mode
Temp.
Fri 3 9 @ )
Auto
4
Fan
Fri 3
Cool Set temp. Auto
1 83
4
Mode
Temp.
Fan
!
2
5 Operation mode
Preset temperature
5
Appears when the Weekly timer is enabled.
Clock Fan speed Button function guide Functions of the corresponding buttons
appear here.
Appears when the ON/OFF operation is centrally controlled.
Appears while the units are operated in the energy saving mode. (Will not
appear on some models of indoor units)
Appears while the outdoor units are operated in the silent mode.
Appears when the built-in thermistor on the remote controller is activated to
monitor the room temperature (1).
appears when the thermistor on the indoor unit is activated to monitor the
room temperature.
Appears when the operation mode is centrally controlled.
Indicates the vane setting.
Appears when the preset temperature is centrally controlled. Indicates the louver setting.
Appears when the filter reset function is centrally controlled.
Indicates the ventilation setting.
Indicates when filter needs maintenance. Room temperature
Appears when the preset temperature range is restricted.
Appears when the buttons are locked.
Appears when the On/Off timer or Auto-off timer function is enabled. appears
when the timer is disabled by the centralized control system. appears when the
HOLD function is enable.
Appears when an energy saving operation is performed using a “3D i-See sensor”
function.
Centrally controlled
Appears for a certain period of time when a centrally-controlled item is
operated.
Preliminary error display
A check code appears during the preliminary error.
Most settings (except ON/OFF, mode, fan speed, temperature) can be made from the Main menu.
TCH117
35
Menu structure Main menu
Press the MENU button. Move the cursor to the desired item with the F1 and F2
buttons, and press the SELECT/HOLD button.
Operation
Vane · Louver · Vent. (Lossnay) High power Comfort Manual vane angle 3D i-See
sensor
Timer menu
Timer ON/OFF timer Auto-OFF timer
Weekly timer OU silent mode
Energy saving
Restriction Temp. range Operation locked
Energy saving Auto return Schedule
Initial setting menu
Basic setting
Main/Sub
Clock
Clock
Daylight saving time
Administrator password
Display setting
Main display
Display details
Contrast · Brightness
Language selection
Operation setting Auto mode Setback mode
Continue to the next page.
Not all functions are available on all models of indoor units.
TCH117
36
Continue from the previous page.
Maintenance menu Error information Filter information Cleaning Auto descending
panel Descending operation Descending adjustment
Service menu Test run menu Test run Drain pump test run
Maintenance information Model name input Serial No. input Dealer information
input Initialize maintenance info.
Settings menu Function setting
Check menu Error history Diagnosis Self check Remote controller check Smooth
maintenance Request code
Other menu Maintenance password Initialize remote controller Remote controller
information
TCH117
Not all functions are available on all models of indoor units.
37
Main menu list
Main menu
Setting and display items
Setting details
Operation Vane · Louver · Vent. (Lossnay)
High power *3
Use to set the vane angle. · Select a desired vane setting.
Use to turn ON/OFF the louver. · Select a desired setting from “ON” and “OFF.”
Use to set the amount of ventilation. · Select a desired setting from “Off,”
“Low,” and “High.”
Use to reach the comfortable room temperature quickly. · Units can be operated
in the High-power mode for up to 30 minutes.
Comfort Manual vane angle
Use to fix each vane angle.
Timer
Timer
3D i-See sensor ON/OFF timer *1
Use to set the following functions for 3D i-See sensor. · Air distribution ·
Energy saving option · Seasonal airflow
Use to set the operation ON/OFF times. · Time can be set in 5-minute
increments.
Auto-Off timer
Use to set the Auto-Off time. · Time can be set to a value from 30 to 240 in 10-minute increments.
Weekly timer 1, 2
Use to set the weekly operation ON/OFF times. · Up to 8 operation patterns can be set for each day. (Not valid when the ON/OFF timer is enabled.)
Energy saving
OU silent mode 1, 3 Restriction Temp. range *2
Use to set the time periods in which priority is given to quiet operation of
outdoor units over temperature control. Set the Start/Stop times for each day
of the week. ·Select the desired silent level from “Normal,” “Middle,” and
“Quiet.”
Use to restrict the preset temperature range. · Different temperature ranges
can be set for different operation modes.
Energy saving
Operation locked
Auto return *2
Use to lock selected functions. · The locked functions cannot be operated.
Use to get the units to operate at the preset temperature after performing
energy saving operation for a specified time period. · Time can be set to a
value from 30 and 120 in 10-minute increments. (This function will not be
valid when the preset temperature ranges are restricted.)
Schedule 1, 3
Set the start/stop times to operate the units in the energy saving mode for each day of the week, and set the energy saving rate. · Up to 4 energy saving operation patterns can be set for each day. · Time can be set in 5-minute increments. · Energy saving rate can be set to a value from 0% or 50 to 90% in 10% increments.
Initial setting
Basic Main/Sub setting
When connecting 2 remote controllers, one of them needs to be designated as a sub controller.
Clock
Use to set the current time.
Daylight saving time
Set the daylight saving time.
Administrator password
The administrator password is required to make the settings for the following items. · Timer setting · Energy saving setting · Weekly timer setting · Restriction setting · Outdoor unit silent mode setting
1 Clock setting is required. 2 2°F (1°C) increments. *3 This function is available only when certain outdoor units are connected.
TCH117
38
Main menu
Setting and display items
Setting details
Initial setting
Display Main display Use to switch between “Full” and “Basic” modes for the Main display, and use
setting
to change the background colors of the display to black.
Display details
Make the settings for the remote controller related items as necessary. Clock: The initial settings are “Yes” and “24h” format. Temperature: Set either Celsius (°C) or Fahrenheit (°F). Room temp.: Set Show or Hide. Auto mode: Set Auto mode display or Only Auto display.
Contrast · Brightness
Use to adjust screen contrast and brightness.
Language selection
Use to select the desired language.
Operation Auto mode setting
Whether or not to use Auto mode can be selected by using the button. This setting is valid only when indoor units with Auto mode function are connected.
Setback mode
Whether or not to use the Setback mode can be selected by using the button. This setting is valid only when indoor units with the Setback mode function are connected.
Maintenance Error information
Use to check error information when an error occurs. · Check code, error
source, refrigerant address, model name, manufacturing number,
contact information (dealer’s phone number) can be displayed. (The model name,
manufacturing number, and contact information need to be registered in advance
to be displayed.)
Filter information
Use to check the filter status. · The filter sign can be reset.
Cleaning Auto descending panel
Use to lift and lower the auto descending panel (Optional parts).
Service
Test run
Select “Test run” from the Service menu to bring up the Test run menu. · Test run · Drain pump test run
Input maintenance
Select “Input maintenance Info.” from the Service menu to bring up the Maintenance information screen. The following settings can be made from the Maintenance Information screen. · Model name input · Serial No. input · Dealer information input · Initialize maintenance info.
Settings Function set- Make the settings for the indoor unit functions via the remote controller as
ting
necessary.
Check Error history Display the error history and execute “delete error history”.
Diagnosis
Self check: Error history of each unit can be checked via the remote controller. Remote controller check: When the remote controller does not work properly, use the remote controller checking function to troubleshoot the problem.
Smooth main- Use to display the maintenance data of indoor/outdoor units. tenance *1
Request code Use to check operation data such as thermistor temperature and error
*1
information.
Others Maintenance Use to change the maintenance password. password
Initialize re- Use to initialize the remote controller to the factory shipment status. mote controller
Remote con- Use to display the remote controller model name, software version,
and serial troller infor- number. mation
*1 This function is available only when certain outdoor units are connected.
TCH117
39
Set Temperature buttons
Mode button (Changes operation mode) Airflow button (Changes up/ down airflow
direction) Timer ON button Timer OFF button
Weekly timer ON/OFF button*
Set Time button (Sets the time)
Display
Operation mode Cool Fan
Heat
Dry
Auto (single set point)
Auto (dual set point)
Temperature setting The units of temperature can be changed. For details,
refer to the Installation Manual.
Vane setting Step 1 Step 2 Step 3 Step 4 Step 5 Swing Auto
Transmission area Remote controller display
OFF/ON button
Fan Speed button (Changes fan speed) i-see button Menu button SET/SEND button
CANCEL button Up/Down buttons
Reset button Note: This button is enabled or disabled depending on the
model of the indoor unit.
Not available Appears when a non-supported function is selected.
Battery replacement indicator Appears when the remaining battery power is low.
Fan speed setting Auto
3D i-See sensor (Air distribution)
Default
Direct
Indirect When Direct or In-
direct is selected,
the vane setting is
set to “Auto”.
TCH117
40
13-2. ERROR INFORMATION
When an error occurs, the following screen will appear. Check the error
status, stop the operation, and consult your dealer. 1. Check code, error
unit, refrigerant address, model name, and serial number will appear. The
model name and serial number will appear only if the information has been
registered. Press the F1 or F2 button to go to the next page.
Contact information (dealer’s phone number) will appear if the information has
been registered.
2. Press the F4 button or the [ON/OFF] button to reset the error that is
occurring. Errors cannot be reset while the ON/OFF operation is prohibited.
Select “OK” with the F4 button.
Navigating through the screens · To go back to the Service menu ………. [MENU] button
TCH117
41
Error information
Error code A3
Error unit IU
Unit#1
Time Occurred 2/ 1 4:48
Model name
Serial No.
Reset error: Reset button
Page
Reset
F1 F2 F3 MENU RETURN SELECT
HOLD
F4 blinks
ON OFF
Error information
Contact information Dealer
Tel
Reset error: Reset button
Page
Reset
Error information
Error code A3
Error unit IU
Unit#1
Time Occurred 2/ 1 4:48
Model name
Serial No.
Reset error: Reset button
Page
Reset
F1 F2 F3 MENU RETURN SELECT
HOLD
F4 blinks
ON OFF
Error reset Reset current error?
Cancel OK
F1 F2 F3 F4
Error reset Error reset Main menu: MENU
· Checking the error information
While no errors are occurring, page 2/2 of the error information can be viewed
by selecting “Error information” from the Maintenance menu. Errors cannot be
reset from this screen.
Maintenance menu Error information Filter information Cleaning
Main menu: RETURN Cursor
F1 F2 F3 F4
MENU RETURN SELECT HOLD
ON OFF
TCH117
42
13-3. SERVICE MENU
Maintenance password is required 1. Select “Service” from the Main menu, and
press the [SELECT/HOLD] button.
*At the main display, the menu button and select “Service” to make the maintenance setting.
Main Main menu Service
2. When the Service menu is selected, a window will appear asking for the
password. To enter the current maintenance password (4 numerical digits), move
the cursor to the digit you want to change with the F1 or F2 button.
Set each number (0 through 9) with the F3 or F4 button.
Then, press the [SELECT/HOLD] button.
Note: The initial maintenance password is “9999”. Change the default password
as necessary to prevent unauthorized access. Have the password available for
those who need it.
: If you forget your maintenance password, you can initialize the password to
the default password “9999” by pressing and holding the F1 button for 10
seconds on the maintenance password setting screen.
3. If the password matches, the Service menu will appear. The type of menu
that appears depends on the connected indoor units’ type.
Note: Air conditioning units may need to be stopped to make only at
“Settings”. There may be some settings that cannot be made when the system is
centrally controlled.
A screen will appear that indicates the setting has been saved.
Navigating through the screens · To go back to the Service menu ………….. [MENU]
button
· To return to the previous screen…………… [RETURN] button
TCH117
43
Service menu Enter maintenance password
Select: SELECT Cursor
F1 F2 F3 MENU RETURN SELECT
HOLD
F4
ON OFF
Service menu Test run Input maintenance info. Settings Check Others Main menu:
RETURN
Cursor
Service menu
Not available. Please stop the unit.
Service menu: RETURN
13-4. TEST RUN
13-4-1. PAR-41MAA 1. Select “Service” from the Main menu, and press the
[SELECT/HOLD] button.
Select “Test run” with the F1 or F2 button, and press the [SELECT/HOLD]
button.
2. Select “Test run” with the F1 or F2 button, and press the [SELECT/HOLD]
button.
Test run operation Press the F1 button to go through the operation modes in
the order of “Cool and Heat”.
Cool mode: Check the cold air blows out. Heat mode: Check the heat blows out.
Check the operation of the outdoor unit’s fan. Press the [SELECT/HOLD] button
and open the Vane setting screen.
Auto vane check Check the auto vane with the F1 F2 buttons. Press the [RETURN]
button to return to “Test run operation”. Press the [ON/OFF] button. When the
test run is completed, the “Test run menu” screen will appear. The test run
will automatically stop after 2 hours. *The function is available only for the
model with vanes.
Service menu
Test run Input maintenance info. Settings Check Others
Main menu: RETURN Cursor
F1 F2 F3 MENU RETURN SELECT
HOLD
F4
ON OFF
Test run menu
Test run Drain pump test run
Service menu: MENU Cursor
F1 F2 F3 MENU RETURN SELECT
HOLD
F4
ON OFF
Test run
Remain
Cool Mode
Pipe 83°F
Switch disp. SELECT
Auto Fan
F1 F2 F3 MENU RETURN SELECT
HOLD
F4
ON OFF
Test run
Remain
Vane
F1 F2 F3 MENU RETURN SELECT
HOLD
F4
ON OFF
TCH117
44
13-4-2. PAR-SL101A-E
1. Press the
button to stop the air conditioner.
· If the weekly timer is enabled ( is on), press the
button to disable it ( is off).
B
2. Press the
button for 5 seconds.
· comes on and the unit enters the service mode.
3. Press the
button .
·
comes on and the unit enters the test run mode.
A
4. Press the following buttons to start the test run.
: Switch the operation mode between cooling and heating
1
and start the test run.
: Switch the fan speed and start the test run.
: Switch the airflow direction and start the test run.
: Switch the louver and start the test run.
2
: Start the test run.
5. Stop the test run.
3
· Press the
button to stop the test run.
· After 2 hours, the stop signal is transmitted.
TCH117
45
13-5. FUNCTION SETTING
13-5-1. PAR-41MAA 1. Select “Service” from the Main menu, and press the
[SELECT/HOLD] button.
Select “Setting” from the Service menu, and press the [SELECT/HOLD] button.
Select “Function setting”, and press the [SELECT/HOLD] button.
2. Set the indoor unit refrigerant addresses and unit numbers with the F1
through F4 buttons, and then press the [SELECT/HOLD] button to confirm the
current setting. Note: Checking the indoor unit No. When the [SELECT/HOLD]
button is pressed, the target indoor unit will start fan operation. If the
unit is common or when running all units, all indoor units for the selected
refrigerant address will start fan operation.
3. When data collection from the indoor units is completed, the current
settings appears highlighted. Non-highlighted items indicate that no function
settings are made. Screen appearance varies depending on the “Unit No.”
setting.
4. Use the F1 or F2 button to move the cursor to select the mode number, and
change the setting number with the F3 or F4 button.
5. When the settings are completed, press the [SELECT/HOLD] button to send
the setting data from the remote controller to the indoor units. When the
transmission is successfully completed, the screen will return to the Function
setting screen.
Note: · Make the above settings only on Mr. Slim units as necessary. · The
above function settings are not available for the CITY MULTI units. · Table 1
summarizes the setting options for each mode number. Refer to the indoor unit
Installation Manual for the detailed information about initial settings, mode
numbers, and setting numbers for the indoor units. · Be sure to write down the
settings for all functions if any of the initial settings has been changed
after the completion of installation work.
TCH117
46
Settings menu Function setting
Service menu: MENU
F1 F2 F3 F4
MENU RETURN SELECT HOLD
ON OFF
Function setting
Ref. address
Unit No.
Grp./1/2/3/4/All
Monitor: SELECT
Cursor
Address
F1 F2 F3 MENU RETURN SELECT
HOLD
F4
ON OFF
Function setting
Ref. address Grp. Mode 1 Mode 2 Mode 3
Mode 4
Request: SELECT
Cursor
Cursor
Function setting
Ref. address Grp. Mode 1
Mode 2 Mode 3 Mode 4
Request: SELECT
Cursor
Cursor
F1 F2 F3 MENU RETURN SELECT
HOLD
F4
ON OFF
Function setting Ref. address
Sending data
F1 F2 F3 MENU RETURN SELECT
HOLD
F4
ON OFF
13-5-2. PAR-SL101A-E Fig. 1
1. Going to the function select mode
Press the
button between of 5 seconds.
(Start this operation from the status of remote controller display turned off.)
[CHECK] is lit and “00” blinks. (Fig. 1)
Press the button to set the “50”.
Direct the wireless remote controller toward the receiver of the indoor unit and
press the
button.
2. Setting the unit number
Press the button to set unit number . (Fig. 2)
Direct the wireless remote controller toward the receiver of the indoor unit and
press the
button.
Fig. 2 Fig. 3 Fig. 4
3. Select a mode
Press the button to set Mode number . (Fig. 3)
Direct the wireless remote controller toward the receiver of the indoor unit and
press the
button.
Current setting number:
1=1 beep (1 second)
2=2 beep (1 second each)
3=3 beep (1 second each)
4. Selecting the setting number
Use the button to change the Setting number . (Fig. 4)
Direct the wireless remote controller toward the receiver of the indoor unit and
press the
button.
5. To select multiple functions continuously
Repeat select and to change multiple function settings continuously.
6. Complete function selection
Direct the wireless remote controller toward the sensor of the indoor unit and
press the
button.
Note: Be sure to write down the settings for all functions if any of the initial settings has been changed after the completion of installation work.
TCH117
47
13-6. ERROR HISTORY
1. Select “Service” from the Main menu, and press the [SELECT/HOLD] button.
Select “Check” with the F1 or F2 button, and press the [SELECT/HOLD] button.
Service menu
Test run Input maintenance info. Settings Check Others
Main menu: RETURN Cursor
F1 F2 F3 F4
MENU RETURN SELECT HOLD
ON OFF
2. Select “Error history” with the F1 or F2 button, and press the
[SELECT/HOLD] button.
3. 16 error history records will appear. 4 records are shown per page, and
the top record on the first page indicates the latest error record.
Check menu Error history Diagnosis Smooth maintenance Request code
Service menu: MENU Cursor
Error history Error Unt# dd/mm/yy
Check menu: RETURN
Page
Delete
F1 F2 F3 F4
MENU RETURN SELECT HOLD
ON OFF
4. Deleting the error history To delete the error history, press the F4
button (Delete) on the screen that shows error history. A confirmation screen
will appear asking if you want to delete the error history.
Press the F4 button (OK) to delete the history.
“Error history deleted” will appear on the screen. Press the [RETURN] button
to go back to the Check menu screen.
Error history Delete error history?
Cancel OK Error history Error history deleted Check menu: RETURN
TCH117
48
13-7. SELF-DIAGNOSIS
13-7-1. PAR-41MAA
1. Select “Service” from the Main menu, and press the [SELECT/HOLD] button.
Select “Check” from the Service menu, and press the [SELECT/HOLD] button.
Select “Diagnosis” from the Check menu, and press the [SELECT/HOLD] button.
Select “Self check” with the F1 or F2 button, and press the [SELECT/HOLD]
button.
Diagnosis
Self check Remote controller check
Service menu: MENU Cursor
F1 F2 F3 F4
MENU RETURN SELECT HOLD
ON OFF
2. With the F1 or F2 button, enter the refrigerant address, and press the [SELECT/HOLD] button.
Self check Ref. address
Select: SELECT Address
3. Check code, unit number, attribute will appear. “-” will appear if no error history is available.
4. Resetting the error history
Press the F4 button (Reset) on the screen that shows the error history.
A confirmation screen will appear asking if you want to delete the error
history.
Press the F4 button (OK) to delete the error history. If deletion fails,
“Request rejected” will appear. “Unit not exist” will appear if no indoor
units that are correspond to the entered address are found.
Navigating through the screens · To go back to the Service menu ………….. [MENU]
button · To return to the previous screen…………… [RETURN] button
TCH117
49
Self check Ref. address
Error Unt # Grp.IC
Return: RETURN
Reset
When there is no error history
Self check
Ref. address
0
Error — Unt# – Grp. —
Return: RETURN
Reset
Self check Ref. address
Delete error history?
Cancel OK
F1 FS2elf cheFc3k F4
Ref. address Error history deleted
Return: RETURN
13-7-2. PAR-SL101A-E
B
3 5
1. Press the
button 1 to stop the air conditioner.
is on), press the
button 3
A
to disable it ( is off).
2. Press the A
button 2 for 5 seconds.
3. Press the button 5 to select the refrigerant address (M-NET address) B
of the indoor
4. Press the
button 4.
1
If
indoor unit and the number of blinks of the OPERATION
INDICATOR lamp.
5. Press the
button 1.
A and the refrigerant address (M-NET address) B
2
check is completed.
4
TCH117
50
13-8. REMOTE CONTROLLER CHECK
If operations cannot be completed with the remote controller, diagnose the
remote controller with this function.
1. Select “Service” from the Main menu, and press the [SELECT/HOLD] button.
Select “Check” from the Service menu, and press the [SELECT/HOLD] button.
Select “Diagnosis” from the Check menu, and press the [SELECT/HOLD] button.
Select “Remote controller check” with the F1 or F2 button, and press the
[SELECT/HOLD] button.
Diagnosis
Self check Remote controller check
Service menu: MENU Cursor
F1 F2 F3 F4
MENU RETURN SELECT HOLD
ON OFF
2. Select “Remote controller check” from the Diagnosis menu, and press the
[SELECT/HOLD] button to start the remote controller check and see the check
results.
To cancel the remote controller check and exit the “Remote controller check”
menu screen, press the [MENU] or the [RETURN] button.
The remote controller will not reboot itself.
Remote controller check Start checking?
Begin: SELECT
F1 F2 F3 F4
MENU RETURN SELECT HOLD
ON OFF
3. OK:
No problems are found with the remote controller. Check other parts
for problems.
E3, 6832: There is noise on the transmission line, or the indoor unit or another
remote controller is faulty. Check the transmission line and the other
remote controllers.
NG (ALL0, ALL1): Send-receive circuit fault. The remote controller needs replac-
ing.
ERC: The number of data errors is the discrepancy between the number of bits
in the data transmitted from the remote controller and that of the data
that was actually transmitted over the transmission line. If data errors are
found, check the transmission line for external noise interference.
Remote controller check results screen Remote controller check OK
Exit : SELECT
If the [SELECT/HOLD] button is pressed after the remote controller check
results are displayed, remote controller check will end, and the remote
controller will automatically reboot itself.
Check the remote controller display and see if anything is displayed
(including lines). Nothing will appear on the remote controller display if the
correct voltage (8.512 VDC) is not supplied to the remote controller. If this
is the case, check the remote controller wiring and indoor units.
TCH117
51
13-9. SMOOTH MAINTENANCE
1. Select “Service” from the Main menu, and press the [SELECT/HOLD] button.
Select “Check” with the F1 or F2 button, and press the [SELECT/HOLD] button.
Select “Smooth maintenance” with the F1 or F2 button, and press the
[SELECT/HOLD] button.
Check menu Error history Diagnosis Smooth maintenance Request code
Service menu: MENU Cursor
F1 F2 F3 F4
MENU RETURN SELECT HOLD
ON OFF
2. Set each item. Select the item to be changed with the F1 or F2 button.
Select the required setting with the F3 or F4 button. <Ref.address>setting [ 0
] [ 15 ]
3. The operation data will appear. The Compressor-Accumulated operating
(COMP. run) time is 10-hour unit, and the Compressor-Number of operation times
(COMP. ON/OFF) is a 100-time unit (fractions discarded).
Navigating through the screens · To go back to the Service menu ………. [MENU]
button · To return to the previous screen ……. [RETURN] button
Smooth maintenance
Ref.address Stable mode
Cool / Heat/ Normal
Begin: SELECT
Cursor
Address
Smooth maintenance
Ref.address
Stable mode
Cool / Heat/ Normal
StabilizationCollecting
Exit: ON/OFF
Smooth maintenance
Ref. address Cool COMP. current COMP. run time COMP. On / Off COMP. frequency
Return: RETURN
Page
A
Hr times Hz
Smooth maintenance
Ref.address
Cool
Sub cool
OU TH4 temp.
OU TH6 temp.
OU TH7 temp.
Return: RETURN
Page
37 ºF 140 ºF 100 ºF 87 ºF
Smooth maintenance
Ref.address
Cool
IU air temp. IU HEX temp. IU filter time
83 ºF 50 ºF 120 Hr
Return: RETURN Page
TCH117
52
Refrigerant address
Single refrigerant system In the case of single refrigerant system, the
refrigerant address is “00” and no operation is required. Simultaneous twin,
triple units belong to this category (single refrigerant system).
[1:1] Refrigerant address=00
Outdoor unit [Twin] Refrigerant address=00
Outdoor unit
Multi refrigerant system (group control) Up to 16 refrigerant systems (16 outdoor units) can be connected as a group by 1 remote controller. To check or set the refrigerant addresses.
Refrigerant address 00
Outdoor unit
Refrigerant address 01
Outdoor unit
Refrigerant address 02
Outdoor unit
Refrigerant address 15
Outdoor unit
Indoor unit 01
Remote controller
Indoor unit 01
Remote controller
Indoor unit 02
Indoor unit Indoor unit Indoor unit
01
01
01
Remote controller
Indoor unit 01
13-10. REQUEST CODE
Details on the operation data including each thermistor temperature and error history can be confirmed with the remote controller.
1. Select “Service” from the Main menu, and press the [SELECT/HOLD] button. Select “Check” with the F1 or F2 button, and press the [SELECT/HOLD] button.
Check menu Error history Diagnosis Smooth maintenance Request code
Service menu: MENU Cursor
Select “Request code” with the F1 or F2 button, and press the [SELECT/HOLD] button.
F1 F2 F3 F4
MENU RETURN SELECT HOLD
ON OFF
2. Set the Refrigerant address and Request code. Select the item to be changed with the F1 or F2 button. Select the required setting with the F3 or F4 button.
Request code
Ref.address Request code
Request: SELECT
Cur.
+
F1 F2 F3 F4
+
MENU RETURN SELECT HOLD
ON OFF
TCH117
Request code: 004 Discharge temperature: 69°C
Request code
Ref.address Request code
Request: SELECT
Cur.
+
53
HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
MITSUBISHI ELECTRIC CONSUMER PRODUCTS (THAILAND) CO., LTD. 700/406 MOO 7, TAMBON DON HUA ROH, AMPHUR MUANG, CHONBURI 20000 THAILAND Published: Mar. 2023 No. TCH117 Made in Thailand
Specifications are subject to change without notice.