Mitsubishi PKA-RP35GAL User manual

SERVICE MANUAL
CONTENTS
1. REFERENCE MANUAL·······································2
2. SAFETY PRECAUTION·······································3
3. PART NAMES AND FUNCTIONS ·······················7
4. SPECIFICATIONS················································9
5. NOISE CRITERION CURVES····························11
6. OUTLINES AND DIMENSIONS·························12
7. WIRING DIAGRAM ············································13
8. REFRIGERANT SYSTEM DIAGRAM ······················14
9. TROUBLE SHOOTING ······································15
10. DISASSEMBLY PROCEDURE ··························30
11. PARTS LIST ·······················································34
Indoor unit
[Model names]
PKA-RP35GAL
PKA-RP50GAL
[Service Ref.]
PKA-RP35GAL
PKA-RP50GAL
Indoor unit
No.OC330
Remote controller
•This manual describes only
service data of the indoor
units.
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
Model name
indication
PKH-P35GALH
PKH-P50GALH
PKH-P35GALH
PKH-P50GALH
April 2005
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2
1REFERENCE MANUAL
Service Ref.
PUHZ-RP35/50/60/71/100/125/140VHA
PUHZ-RP100/125/140YHA
PUHZ-RP71/100/125/140VHA-A
PUHZ-RP200/250YHA
PUHZ-RP200/250YHA-A
PU(H)-P·VGAA.UK
PU(H)-P·YGAA.UK
Service Manual No.
OC334
OC337
OC338
OC339
OC336
1-1. OUTDOOR UNIT’S SERVICE MANUAL
Series (Outdoor unit)
PUHZ-RP·VHA(-A)
PUHZ-RP·YHA(-A)
PU(H)-P·VGAA.UK
PU(H)-P·YGAA.UK
Manual No.
OCS01
OCS02
1-2. TECHNICAL DATA BOOK
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3
2SAFETY PRECAUTION
[2] Refrigerant recharging
(1) Refrigerant recharging process
1Direct charging from the cylinder.
·R407C cylinder are available on the market has a syphon pipe.
·Leave the syphon pipe cylinder standing and recharge it.
(By liquid refrigerant)
(2) Recharge in refrigerant leakage case
·After recovering the all refrigerant in the unit, proceed to working.
·Do not release the refrigerant in the air.
·After completing the repair service, recharge the cycle with the specified amount of
liquid refrigerant.
[1] Cautions for service
·After recovering the all refrigerant in the unit, proceed to working.
·Do not release refrigerant in the air.
·After completing the repair service, recharge the cycle with the specified amount of
liquid refrigerant.
Cautions for units utilizing refrigerant R407C
CAUTIONS RELATED TO NEW REFRIGERANT
Do not use the existing refrigerant piping.
The old refrigerant and lubricant in the existing piping
contains a large amount of chlorine which may cause the
lubricant deterioration of the new unit.
Use “low residual oil piping”
If there is a large amount of residual oil (hydraulic oil, etc.)
inside the piping and joints, deterioration of the lubricant
will result.
Use ESTER , ETHER or HAB as the lubricant to
coat flares and flange connection parts.
If large amount of mineral oil enter, that can cause
deterioration of refrigerant oil etc.
Use liquid refrigerant to seal the system.
If gas refrigerant is used to seal the system, the composition
of the refrigerant in the cylinder will change and performance
may drop.
Do not use a refrigerant other than R407C.
If another refrigerant (R22, etc.) is used, the chlorine in the
refrigerant may cause the lubricant deterioration.
Use a vacuum pump with a reverse flow check valve.
The vacuum pump oil may flow back into the refrigerant
cycle and cause the lubricant deterioration.
Store the piping to be used during installation
indoors with keep both ends sealed until just
before brazing.
(Store elbows and other joints in a plastic bag.)
If dust, dirt, or water enters the refrigerant cycle,
deterioration of the oil and compressor trouble may result. Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
Gravimeter
Unit
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4
[3] Service tools
Use the below service tools as exclusive tools for R407C refrigerant.
No. Tool name Specifications
1Gauge manifold ·Only for R407C.
·Use the existing fitting SPECIFICATIONS. (UNF7/16)
·Use high-tension side pressure of 3.43MPa·G or over.
2Charge hose ·Only for R407C.
·Use pressure performance of 5.10MPa·G or over.
3Electronic scale
4Gas leak detector ·Use the detector for R134a or R407C.
5Adapter for reverse flow check. ·Attach on vacuum pump.
6Refrigerant charge base.
7Refrigerant cylinder. ·For R407C ·Top of cylinder (Brown)
·Cylinder with syphon
8Refrigerant recovery equipment.
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5
Cautions for units utilizing refrigerant R410A
CAUTIONS RELATED TO NEW REFRIGERANT
Use new refrigerant pipes.
Make sure that the inside and outside of refrige-
rant 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.
Store the piping to be used during installation
indoors and keep both ends of the piping sealed
until just before brazing. (Leave elbow joints, etc.
in their packaging.)
Use ester oil, ether oil or alkylbenzene oil (small
amount) as the refrigerant oil applied to flares
and flange connections.
In case of using the existing pipes for R22, be careful with
the followings.
· Change flare nut to the one provided with this product.
Use a newly flared pipe.
· Avoid using thin pipes.
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 refrige-
rant can cause deterioration of refrigerant oil etc.
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.
Keep the tools with care.
If dirt, dust or moisture enter into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigera-
nt will change and the efficiency will be lowered.
Flare tool
Electronic refrigerant
charging scale
Vacuum pump adaptor
Size adjustment gauge
Gauge manifold
Torque wrench
Gas leak detector
Charge hose
Tools for R410A
Contamination inside refrigerant piping can cause deterio-
ration of refrigerant oil etc.
If dirt, dust or moisture enter into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
If large amount of mineral oil enter, that can cause deterio-
ration of refrigerant oil etc.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
[1] Cautions for service
(1) Perform service after collecting 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.
[2] Additional refrigerant charge
When charging directly from cylinder
· Check that cylinder for R410A on the market is syphon type.
· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
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6
Gravimeter
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Specifications
1Gauge manifold ·Only for R410A
·Use the existing fitting specifications. (UNF1/2)
·Use high-tension side pressure of 5.3MPa·G or over.
2Charge hose ·Only for R410A
·Use pressure performance of 5.09MPa·G or over.
3Electronic scale
4Gas leak detector ·Use the detector for R134a, R407C or R410A.
5Adaptor for reverse flow check ·Attach on vacuum pump.
6Refrigerant charge base
7Refrigerant cylinder ·Only for R410A Top of cylinder (Pink)
Cylinder with syphon
8Refrigerant recovery equipment
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7
3PART NAMES AND FUNCTIONS
● Indoor Unit
Air intake Air intake grille
Filter
Air outlet
Guide vane
Auto vane
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8
●Wireless remote controller
●When cover is open.
ON/OFF TEMP
FAN
VANE
TEST RUN
AUTO STOP
AUTO START
h
min
LOUVER
MODE
CHECK
RESETSET CLOCK
MODEL SELECT
NOT AVAILABLE
CHECK TEST RUN
˚C
AMPM
AMPM
VANE CONTROL button
Used to change the air flow direction.
CLOCK button
RESET button
SET button
ON/OFF button
The unit is turned ON and OFF alternately
each time the button is pressed.
LOUVER button
This switch the horizontal fan motion ON
and OFF.
(Not available for this model.)
MODE SELECT button
Used to switch the operation mode between
cooling, drying, blowing, heating and auto
mode.
CHECK-TEST RUN button
Only press this button to perform an inspec-
tion check or test operation.
Do not use it for normal operation.
FAN SPEED SELECT button
Used to change the fan speed.
TIMER display
Displays when in timer operation or when
setting timer.
button
SET TEMPERATURE button sets any desired
room temperature.
CLOCK display
Displays the current time.
“” “ ” display
Displays the order of timer operation.
“ ” “ ” display
Displays whether timer is on or off.
wIn case the outdoor unit is cool only type,
the heating and auto mode not available.
Buttons used to set the “hour and minute” of
the current time and timer settings.
h and min buttons
display
SET TEMP. display indicates desired temper-
ature set.
display
FAN SPEED display indicates which fan
speed has been selected.
display
The vertical direction of air flow is indicated.
display
Blinks when model is selected.
display
Lights up while transmission to the indoor
unit is mode using switches.
display
CHECK&TEST RUN display indicates that
the unit is being checked or test-run.
display
OPERATION MODE display
Operation mode display indicates which op-
eration mode is in effect.
TIMER CONTROL buttons
AUTO STOP (OFF timer): when this switch
is set, the air conditioner will be au-
tomatically stopped at the preset time.
AUTO START (ON timer): when this switch
is set, the air conditioner will be automatical-
ly started at the preset time.
MODEL SELECT
CHECK TEST RUN
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9
4SPECIFICATIONS
kW
A
A
kW
K/min(CFM)
Pa(mmAq)
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
Service Ref.
Mode
Power supply(phase, cycle, voltage)
Input
Running current
Starting current
External finish
Heat exchanger
Fan Fan(drive) x No.
Fan motor output
Airflow(Low-Medium2-Medium1-High)
External static pressure
Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Unit drain pipe O.D.
Dimensions
Weight
W
D
H
INDOOR UNIT
Cooling
0.07
0.33
0.40
Heating
0.07
0.33
0.40
Single phase, 50Hz, 230V
Munsell 0.70Y 8.59/0.97
Plate fin coil
Line flow (direct) x 1
0.030
9-10-11-12(320-355-390-425)
0(direct blow)
Wireless remote controller & built-in
36-38-41-43
20(13/16)
990(39)
235(9-1/4)
340(13-3/8)
16(35)
PKA-RP50GAL
kW
A
A
kW
K/min(CFM)
Pa(mmAq)
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
Service Ref.
Mode
Power supply(phase, cycle, voltage)
Input
Running current
Starting current
External finish
Heat exchanger
Fan Fan(drive) x No.
Fan motor output
Airflow(Low-Medium2-Medium1-High)
External static pressure
Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Unit drain pipe O.D.
Dimensions
Weight
W
D
H
INDOOR UNIT
PKA-RP35GAL
Cooling
0.07
0.33
0.40
Heating
0.07
0.33
0.40
Single phase, 50Hz, 230V
Munsell 0.70Y 8.59/0.97
Plate fin coil
Line flow (direct) x 1
0.030
9-10-11-12(320-355-390-425)
0(direct blow)
Wireless remote controller & built-in
36-38-41-43
20(13/16)
990(39)
235(9-1/4)
340(13-3/8)
16(35)
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10
Single phase, 50Hz, 230V
Munsell 0.70Y8.59/0.97
Plate fin coil
Line flow (direct) x 1
0.030
9-10-11-12(318-353-388-424)
0(direct blow)
<0.73>
Wireless remote controller & built-in
36-38-41-43
20(13/16)
990(39)
235(9-1/4)
340(13-3/8)
17(37)
Service Ref.
Mode
Power supply(phase, cycle,voltage)
Input w1
Running current w1
Starting current w1
External finish
Heat exchanger
Fan Fan(drive) x No.
Fan motor output
Airflow(Low-Medium2-Medium1-High)
External static pressure
Booster heater w1
Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Unit drain pipe O.D.
Dimensions
Weight
INDOOR UNIT
W
D
H
w1 : < > Shows the only booster heater rating.
PKH-P35GALH
Cooling
0.07
0.33
0.40
Heating
0.07<0.73>
0.33<3.17>
0.40<3.17>
kW
A
A
kW
K/min(CFM)
Pa(mmAq)
kW
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
Single phase, 50Hz, 230V
Munsell 0.70Y 8.59/0.97
Plate fin coil
Line flow (direct) x 1
0.030
9-10-11-12(318-353-388-424)
0(direct blow)
<0.73>
Wireless remote controller & built-in
36-38-41-43
20(13/16)
990(39)
235(9-1/4)
340(13-3/8)
17(37)
kW
A
A
kW
K/min(CFM)
Pa(mmAq)
kW
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
Service Ref.
Mode
Power supply(phase, cycle,voltage)
Input w1
Running current w1
Starting current w1
External finish
Heat exchanger
Fan Fan(drive) x No.
Fan motor output
Airflow(Low-Medium2-Medium1-High)
External static pressure
Booster heater w1
Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Unit drain pipe O.D.
Dimensions
Weight
INDOOR UNIT
W
D
H
Cooling
0.07
0.33
0.40
Heating
0.07<0.73>
0.33<3.17>
0.40<3.17>
PKH-P50GALH
w1 : < > Shows the only booster heater rating.
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11
5NOISE CRITERION CURVES
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0dB=0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
PKA-RP35GAL
PKA-RP50GAL
PKH-P35GALH
PKH-P50GALH
High
NOTCH
Medium1
Medium2
Low
43
SPL(dB)
41
38
36
LINE
UNIT WALL
1m
1m
MICROPHONE
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12
6OUTLINES AND DIMENSIONS
INDOOR UNIT
PKH-P35GALH PKH-P50GALH PKA-RP35GAL PKA-RP50GAL Unit : mm
BYOFF
ON STAND HEATCOOL
OFF BY
ON STAND COOL HEAT
ÅrÇoÇoÅqÅ@ëOñ Å@ÇeÇqÇnÇmÇs ÅrÇoÇoÅqÅ@ëOñ Å@ÇeÇqÇnÇmÇs
r.SLI.SLI
m m
MITSUBISHIELECTRICMITSUBISHIELECTRIC
r.S.S
L
I
m m
MITSUBISHIELECTRICMITSUBISHIELECTRIC
Knock out hole for right piping Refrigerant pipe.Drain pipe. Wiring hole
21
Right side Less than 15
70 245
60
235
Auto vane
Front view
Air intake
Air intake
Air intake
Air intake
198
53
340
715 225
340 80 280 233
990
21
Left side
Knock out hole for left piping Refrigerant pipe.Drain pipe.Wiring hole. 60
70 245
(Necessary clearance for Unit installation)
Right side
Allowing clearances Front view
Less than 130
50 or more 150 or more
180 or more 30 or more
for bolts
Left-rear piping hole
left-rear piping
R52.5 R52.5
Installation plate balance point hole
Details of installation plate
49-[5hole
for tapping screw
Knock out hole for right-rear piping Right-rear
piping hole
Unit center
14-[14hole
Knock out hole for
425
420
170
190
210
230
0
322 0 35 55 80 130 190 230 272 310 0
35
95
150
205
260
320
345
495
20
75
135
190
245
300
360
405
495
32
0
w1 Sleeves are available on the market. w2 This size shows the lower end of through hole.
[90~[100[90 Through hole
Sleeve w1
35, 50 Model
R52.5
R52.5
Gas pipe
Liquid pipe
Terminal block for Terminal block to outdoor unit
Filter grip
Service panel (Power supply access)
(Flexible hose total length800) (Right side piping
installation)
(Left side piping
installation)
Unit drain pipe O.D.20
Front view(to open the grille)
700
449 86
581 54
31 280
35
Knock out hole for under piping Refrigerant piping.Drain pipe. Wiring hole
12-Louvers(manual)
Air outlet
Lower side
80
50
395400
190
60
70 35
79
160 40
235
705
power supply (Heater (PKH-P35, 50GALH only))
153
Gas pipe
Liquid pipe
RP35, 50 P35, 50 3/8F([9.52) 5/8F([15.88)
Model
Refigerant Pipe flared connection For PUHZ–RP type : 1/4F([6.35) For PU(H)–P type : 3/8F([9.52)
Refigerant Pipe flared connection For PUHZ–RP type : 1/2F([12.7) For PU(H)–P type : 5/8F([15.88)
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13
INTAKE
CN20
(
RED
)
LIQUID
CN21
(
WHT
)
PIPE
CN29
(
BLK
)
1 2 1 2 1 2
1 31 31 3 1 2
TH5TH1 TH2
REMOCON
CN22
(
BLU
)
1 2
2
1
TB5
R.B
TB6
2
1
TRANSMISSION WIRES DC12V
SWE
ON
OFF
SW2 SW1
LED3 LED2 LED1
ZNR
FUSE
X4
CN41 CN2L
CN51 CN32
WIRELESS
CN90
(
WHT
)
VANE
CN6V
(
GRN
)
MV
6
W.B
BZ CNB
RECEIVER
RU LED1 LED2 SW2SW1
9
FAN
(
WHT
)135
1
1
21 2
3
2 3
BLK WHT WHT RED RED
C
MF
X4
BCR
TO
OUTDOOR
UNIT
TB4S1
S2
S3
YLW
ORN
ORN
BRN
YLW ORN BLK WHT
P.B
I.B
POWER
CNDK
(RED)
CNDK
(RED)
DC13.1V
CN2S
(WHT)
POWER
CND
(ORN) POWER
CN2D(WHT)
INDOOR/OUTDOOR
COMMUNICATION
CN3C(BLU)
3131
POWER
CND
(ORN)
INDOOR/OUTDOOR
COMMUNICATION
CN3C
(BLU)
TB2
TB4
POWER
SUPPLY
~(1PHASE)
230V 50Hz
RED
BLU
YLW
ORN
ORN
BRN
TO
OUTDOOR
UNIT
L
S1
S2
S3
N
I.B
YLW
ORN
w1 (Fig.1)
Refer to tables 1
and 2 for service PCB.
GRN/YLW
7WIRING DIAGRAM
PKH-P35GALH PKH-P50GALH PKA-RP35GAL PKA-RP50GAL
TB2
I.B
HEATER
CN24
(YLW)
POWER SUPPLY
~(1PHASE)
230V 50Hz
88H
FS2
26H H1 L
REDRED 5 3RED BLU
GRN/YLW
WHT
RED
61 REDGRY
N
2
1
2
6
5
1
FS1
88H
YLW YLW
SW1
Service board
SW2
Service board Service board
1 2 3 4 5
ON
OFF
1 2 3 4 5
ON
OFF
MODELS
PKA-RP35GAL
PKH-P35GALH
1 2 3 4 5
ON
OFF
MODELS
PKA-RP50GAL
PKH-P50GALH
Please set the voltage using the
remote controller.
For the setting method,please refer to
the indoor unit Installation Manual.
PKH-P35,50GALH models only
P.B INDOOR POWER BOARD
SYMBOL NAME
I.B INDOOR CONTROLLER BOARD
FUSE FUSE (T6.3AL250V)
ZNR VARISTOR
CN2L CONNECTOR <LOSSNAY>
CN32 CONNECTOR <REMOTE SWITCH>
CN41 CONNECTOR <HA TERMINAL-A>
CN51 CONNECTOR <CENTRALLY CONTROL>
SW1 SWITCH <MODEL SELECTION>wSee Table 1.
SW2 SWITCH <CAPACITY CODE>wSee Table 2.
SWE SWITCH <EMERGENCY OPERATION>
X4 RELAY <FAN MOTOR>
BCR
POWER SUPPLY <R.B>
LED1 POWER SUPPLY <I.B>
LED2 TRANSMISSION <INDOOR-OUTDOOR>LED3
FAN CONTROL ELEMENT
C CAPACITOR <FAN MOTOR>
FAN MOTOR
VANE MOTOR
MF
MV
SYMBOL NAME
TB4 TERMINAL BLOCK <INDOOR/ OUTDOOR
TB2 TERMINAL BLOCK (HEATER) wPKH-P.GALH
models only or option for PKA-RP.GAL models.
CONNECTING LINE>
TERMINAL BLOCK <REMOTE CONTROLLER
TRANSMISSION LINE> <OPTION>
ROOM TEMP.THERMISTOR
<0:/ 15k", 25:/ 5.4k"DETECT>
PIPE TEMP.THERMISTOR/ LIQUID
<0:/ 15k", 25:/ 5.4k"DETECT>
COND./ EVA.TEMP.THERMISTOR
<0:/ 15k", 25:/ 5.4k"DETECT>
TB5,TB6
TH5
TH1
TH2
W.B WIRELESS REMOTE CONTROLLER BOARD
RECEIVING UNIT
BUZZER
LED <RUN INDICATOR>
LED <HOT ADJUST>
SWITCH (HEATING ON/ OFF>
SWITCH (COOLING ON/ OFF>
WIRED REMOTE CONTROLLER BOARD
R.B
HEATER
RU
BZ
LED1
LED2
SW1
SW2
NAMESYMBOL
HEATER
H1 THERMAL FUSE <84:10A>
FS2 THERMAL FUSE <104:10A>
FS1
HEATER THERMAL SWITCH
26H HEATER CONTACTOR
88H
NOTES:
1. Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing.
2. Indoor and outdoor connecting wires are made with polarities, make wiring matching terminal numbers (S1, S2, S3).
3. Make sure that the main power supply of the booster heater is independent.
4. Symbols used in wiring diagram above are, : Connector, : Terminal (block).
w1. When work to supply power separately to Indoor and Outdoor unit was applied, refer to Fig 1.
w2. For power supply system of this unit, refer to the caution label located near this diagram.
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14
8REFRIGERANT SYSTEM DIAGRAM
PKA-RP35GAL PKH-P35GALH
PKA-RP50GAL PKH-P50GALH
Unit : mm
Pipe temperature
thermistor/liquid
(TH2)
Distributor
with strainer
#50
Condenser/evaporator
temperature thermistor
(TH5)
Room temperature
thermistor (TH1)
Refrigerant flow in cooling
Refrigerant flow in heating
Strainer
#50
Strainer
#50
Heat exchanger Refrigerant GAS pipe connection
(Flare)
Refrigerant LIQUID pipe connection
(Flare)
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15
9TROUBLESHOOTING
<Error code display by self-diagnosis and actions to be taken for service (summary)>
Present and past error codes are logged and displayed on the wired remote controller or controller board of outdoor unit.
Actions to be taken for service and the inferior phenomenon reoccurrence at field are summarized in the table below. Check
the contents below before investigating details.
9-1. TROUBLESHOOTING
Unit conditions at service Error code Actions to be taken for service (summary)
The inferior phenomenon is
reoccurring.
Displayed
Not displayed
Judge what is wrong and take a corrective action
according to “SELF-DIAGNOSIS ACTION TABLE” (9-3).
Identify the cause of the inferior phenomenon and take
a corrective action according to “TROUBLESHOOTING
BY INFERIOR PHENOMENA” (9-4).
The inferior phenomenon is
not reoccurring.
Logged
Not logged
1Consider the temporary defects such as the work of
protection devices in the refrigerant circuit including
compressor, poor connection of wiring, noise and etc.
Re-check the symptom, and check the installation
environment, refrigerant amount, weather when the
inferior phenomenon occurred, and wiring related.
2Reset error code logs and restart the unit after finishing
service.
3There is no abnormality in electrical components,
controller boards, and remote controller.
1Recheck the abnormal symptom.
2Identify the cause of the inferior phenomenon and take
a corrective action according to “TROUBLESHOOTING
BY INFERIOR PHENOMENA” (9-4).
3Continue to operate unit for the time being if the cause
is not ascertained.
4There is no abnormality in electrical components,
controller boards, remote controller etc.
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16
[Procedure]
1. Press the CHECK button twice.
2. Press the temperature
buttons.
3. Point the remote controller at the
sensor on the indoor unit and
press the HOUR button.
4. Point the remote controller at the
sensor on the indoor unit and
press the ON/OFF button.
• "CHECK" lights, and refrigerant
address "00" flashes.
• Check that the remote controller's
display has stopped before continuing.
• Select the refrigerant address of the
indoor unit for the self-diagnosis.
Note: Set refrigerant address using the
outdoor unit’s DIP switch (SW1).
(For more information, see the
outdoor unit installation manual.)
• If an air conditioner error occurs, the
indoor unit's sensor emits an intermit-
tent buzzer sound, the operation light
flashes, and the error code is
output.
(It takes 3 seconds at most for error
code to appear.)
• The check mode is cancelled.
<Malfunction-diagnosis method at maintenance service>
9-2. MALFUNCTION-DIAGNOSIS METHOD BY REMOTE CONTROLLER
<In case of trouble during operation>
When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform
unusual stop.
ON/OFF TEMP
FAN
VANE
MODE
CHECK
LOUVER
TEST RUN
AUTO STOP
AUTO START
h
min
RESET
SET CLOCK
CHECK
CHECK
display
Temperature
button
CHECK
button
Refrigerant
address
display
HOUR
button
ON/OFF
button
To be continued to the next page.
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17
[Output pattern A] Errors detected by indoor unit
[Output pattern B]
E9
*1If the beeper does not sound again after the initial
two beeps to confirm the self-check start signal was received and
the OPERATION INDICATOR lamp does not come on,
there are no error records.
*2If the beeper sounds three times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 sec.)” after the initial two beeps to confirm
the self-check start signal was received, the specified refrigerant address is incorrect.
OPERATION
INDICATOR
lamp flash
pattern
Beep Beep Beep Beep Beep Beep Beep
Off
Approx. 2.5 sec. On Approx. 3 sec. On 0.5 sec. On 0.5 sec. On 0.5 sec. On 0.5 sec. Off Approx. 2.5 sec. On Approx. 3 sec. On 0.5 sec. On 0.5 sec.
· · · Repeated
Number of flashes/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “U2”) Number of flashes/beeps in pattern indicates the check code in the following table
nth
1st 2nd 3rd 1st 2nd
Self-check
starts
(Start signal
received)
Beeper sounds
[Output pattern B]
OPERATION
INDICATOR
lamp flash
pattern
Beep Beep Beep Beep Beep Beep Beep
Off
Approx. 2.5 sec. On 0.5 sec. On 0.5 sec. On 0.5 sec. On
0.5 sec. Off
Approx. 2.5 sec. On 0.5 sec. On 0.5 sec.
· · ·Repeated
Number of flashes/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “P5”) Number of flashes/beeps in pattern indicates the check code in the following table
nth 1st 2nd 3rd 1st 2nd
Self-check
starts
(Start signal
received)
Beeper sounds
• Refer to the following tables for details on the check codes.
[Output pattern A]
Beeper sounds/OPERATION
INDICATOR lamp flashes 1Check code Symptom Remark
(Number of times)
Wireless remote controller
Wired remote controller
Beeper sounds/OPERATION
INDICATOR lamp flashes 1Check code
(Number of times)
Wireless remote controller
Wired remote controller
1P1
Intake sensor error
P9 Pipe (TH5) sensor error
2P2 Pipe (TH2) sensor error
3 E6,E7 Indoor/outdoor unit communication error
4 P4 Drain sensor error
5 P5 Drain pump error
6 P6 Freeing/Overheating safeguard operation
7 EE Communication error between indoor and outdoor units
8 P8 Pipe temperature error
9 E4, E5 Remote controller signal receiving error
10 –
11 ––
–
Errors detected by unit other than indoor unit (outdoor unit, etc.)
Symptom Remark
1Indoor/outdoor unit communication error
2(Transmitting error) (Outdoor unit)
3Open/short of outdoor unit thermistors
4Compressor overcurrent interruption (When compressor locked)
5Abnormal high discharging temperature/49C worked/
insufficient refrigerant
6Abnormal high pressure (63H worked)/Overheating
safeguard operation
7Abnormal temperature of heat sink
8Outdoor unit fan safeguard stop
9Compressor overcurrent interruption/Abnormal of power module
10 Abnormality of super heat due to low discharge temperature
11 Abnormality such as overvoltage or voltage shortage and
abnormal synchronous signal to main circuit/Current sensor error
12
13
U2
U5
UP
U3,U4
UF
U1,Ud
U8
U6
U7
U9,UH
Others
–
–– –
14 Other errors (Refer to the technical manual for the outdoor unit.)
For details, check
the LED display
of the outdoor
controller board.
As for outdoor
unit, refer to
outdoor unit's
service manual.
12 Fb Indoor unit control system error (memory error, etc.)
–E0, E3
– E1, E2 Remote controller control board error
Remote controller transmission error
Compressor overcurrent interruption
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18
•If the unit cannot be operated properly after the above test run has been performed, refer to the following table to remove the cause.
Symptom Cause
Wired remote controller LED 1, 2 (PCB in outdoor unit)
On the wireless remote controller with condition above, following phenomena takes place.
• No signals from the remote controller are accepted.
• OPE lamp is blinking.
• The buzzer makes a short piping sound.
PLEASE WAIT
PLEASE WAIT →Error code
Display messages do not
appear even when operation
switch is turned ON (operation
lamp does not light up).
For about 2
minutes follow-
ing power-on
After about 2
minutes has
expired follow-
ing power-on
After LED 1, 2 are lighted, LED 2 is
turned off, then only LED 1 is
Only LED 1 is lighted. →
LED 1, 2 blink.
Only LED 1 is lighted. →
LED 1 blinks twice,
LED 2 blinks once.
•For about 2 minutes following power-on,op-
eration of the remote controller is not possible
due to system start-up. (Correct operation)
•Connector for the outdoor unit’s protection
device is not con-nected.
•Reverse or open phase wiring for the outdoor
unit’s power terminal block (L1, L2, L3)
•Incorrect wiring between indoor and outdoor
units (incorrect polarity of S1, S2, S3)
•Remote controller wire short
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 microcomputer) Indicates whether control power is supplied. Make sure that this LED is
always lit.
LED2 (power for remote controller) 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 address “0”.
LED3 (communication between indoor and
outdoor units) Indicates state of communication between the indoor and outdoor units. Make sure that this LED is always blinking.
lighted. (Correct operation)
• On wireless remote controller
2The continuous buzzer sounds from receiving section of indoor unit.
3Blink of operation lamp
• On wired remote controller
1Check code displayed in the LCD.
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19
9-3. SELF-DIAGNOSIS ACTION TABLE Note: Refer to the manual of outdoor unit for the details of display
such as F, U, and other E.
Error Code
Meaning of error code and detection method
Cause Countermeasure
P1
Abnormality of room temperature
thermistor (TH1)
1The unit is in three-minute resume
prevention mode if short/open of
thermistor is detected. Abnormal if the
unit does not reset normally after three
minutes. (The unit returns to normal
operation, if it has normally reset.)
2Constantly detected during cooling,
drying, and heating operation.
Short: 90:or more
Open: -40:or less
1Defective thermistor
characteristics.
2Contact failure of connector
(CN20) on the indoor controller
board. (Insert failure)
3Breaking of wire or contact
failure of thermistor wiring.
4Defective indoor controller
board.
1–3Check resistance value of thermistor.
0:······15.0k"
10:····9.6k"
20:····6.3k"
30:····4.3k"
40:····3.0k"
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.
2Check contact failure of connector (CN20) on
the indoor controller board. Refer to 9-7.
Turn the power on again and check restart
after inserting connector again.
4Check 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.
P2
Abnormality of pipe temperature
thermistor/Liquid (TH2)
1The unit is in three-minute resume
prevention mode if short/open of
thermistor is detected. Abnormal if the
unit does not reset normally after three
minutes. (The unit returns to normal
operation, if it has normally reset.)
2Constantly detected during cooling,
drying, and heating (except defrosting)
operation.
Short: 90:or more
Open: -40:or less
1Defective thermistor
characteristics.
2Contact failure of connector
(CN21) on the indoor controller
board. (Insert failure)
3Breaking of wire or contact
failure of thermistor wiring.
4Defective refrigerant circuit is
causing thermistor temperature
of 90:or more or -40:or
less.
5Defective indoor controller board.
1–3Check resistance value of thermistor.
For characteristics, refer to (P1) above.
2Check contact failure of connector (CN21) on
the indoor controller board. Refer to 9-7. Turn
the power on and check restart after inserting
connector again.
4Check pipe <liquid> temperature with remote
controller in test run mode. If pipe <liquid>
temperature is exclusively low (in cooling
mode) or high (in heating mode), refrigerant
circuit may have defective.
5Check pipe <liquid> temperature with remote
controller in test run mode. If there is exclusive
difference with actual pipe <liquid> temperature,
replace indoor controller board.
Turn the power off, and on again to operate
after check.
P4
Abnormality of drain sensor (DS)
1Suspensive abnormality, if short/open of
thermistor is detected for 30 seconds
continuously.
Turn off compressor and indoor fan.
2Short/open is detected for 30 seconds
continuously during suspensive
abnormality.
(The unit returns to normal operation,
if it has normally reset.)
3Detect the following condition.
• During cooling and drying operation.
• In case that pipe <liquid> temperature
- room temperature <-10deg
(Except defrosting)
• When pipe <liquid> temperature or
room temperature is short/open
temperature.
• During drain pomp operation.
1Defective thermistor
characteristics
2Contact failure of connector
(CN31) on the indoor controller
board. (Insert failure).
3Breaking of wire or contact
failure of drain sensor wiring.
4Defective indoor controller board.
1–3Check resistance value of thermistor.
0:······6.0k"
10:····3.9k"
20:····2.6k"
30:····1.8k"
40:····1.3k"
2Check contact failure of connector (CN31) on
the indoor controller board. Refer to 9-7. Turn
the power on again and check restart after
inserting connector again.
4Replace indoor controller board if drain
pump operates with the line of drain sensor
connector CN31-1and 2is short-circuited,
and abnormality reappears.
Turn the power off, and on again to operate
after check.
P5
Malfunction of drain pump (DP)
1Suspensive abnormality, if thermistor
of drain sensor is let heat itself and
temperature rises slightly. Turn off
compressor and indoor fan.
2Drain pomp is abnormal if the condition
above is detected during suspensive
abnormality.
3Constantly detected during drain pomp
operation.
1Malfunction of drain pump
2Defective drain
Clogged drain pump
Clogged drain pipe
3Attached drop of water at the
drain sensor
• Drops of drain trickles from
lead wire.
• Clogged filter is causing
wave of drain.
4Defective indoor controller board.
1Check if drain-up machine works.
2Check drain function.
3Check the setting of lead wire of drain sensor
and check clogs of the filter.
4Replace indoor controller board if drain
pump operates with the line of drain sensor
connector CN31-1and 2is short-circuited
and abnormality reappears.
Refer to 9-7.
Turn the power off, and on again to operate
after check.
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20
Error Code
Meaning of error code and detection method
Cause Countermeasure
P6
Freezing/overheating protection is
working
1Freezing protection (Cooling mode)
The unit is in six-minute resume prevention
mode if pipe <liquid or condenser/evap-
orator> temperature stays under
-15:for three minutes, three minutes
after the compressor started. Abnormal
if it stays under -15:for three minutes
again within 16 minutes after six-minute
resume prevention mode.
<Frost prevention mode>
If pipe <liquid or condenser-evaporator>
temperature is 2:or below when 16
minutes has passed after compressor
starts operating, unit will start operating
in frost prevention mode which stops
compressor operation. After that, when
pipe <liquid or condenser/evaporator>
temperature stays 10:or more for 3
minutes, frost prevention mode will be
released and compressor will restart its
operation.
2Overheating protection (Heating mode)
The units is in six-minute resume
prevention mode if pipe <condenser /
evaporator> temperature is detected as
over 70:after the compressor started.
Abnormal if the temperature of over
70:is detected again within 10 minutes
after six-minute resume prevention
mode.
P8
1Slight temperature difference
between indoor room
temperature and pipe <liquid
or condenser / evaporator>
temperature thermistor
• Shortage of refrigerant
• Disconnected holder of pipe
<liquid or condenser /
evaporator> thermistor
• Defective refrigerant circuit
2Converse connection of
extension pipe (on plural units
connection)
3Converse wiring of indoor/
outdoor unit connecting wire
(on plural units connection)
4Defective detection of indoor
room temperature and pipe
<condenser / evaporator>
temperature thermistor
5Stop valve is not opened
completely.
(Cooling or drying mode)
1Clogged filter (reduced airflow)
2Short cycle of air path
3Low-load (low temperature)
operation beyond the tolerance
range
4Defective indoor fan motor
• Fan motor is defective.
• Indoor controller board is
defective.
5Defective outdoor fan control
6Overcharge of refrigerant
7Defective refrigerant circuit
(clogs)
(Heating mode)
1Clogged filter (reduced airflow)
2Short cycle of air path
3Over-load (high temperature)
operation beyond the tolerance
range
4Defective indoor fan motor
• Fan motor is defective.
• Indoor controller board is
defective.
5Defective outdoor fan control
6Overcharge of refrigerant
7Defective refrigerant circuit
(clogs)
8Bypass circuit of outdoor unit
is defective.
(Cooling or drying mode)
1Check clogs of the filter.
2Remove shields.
4Measure the resistance of fan motor's winding.
Measure the output voltage of fan's connector
(FAN) on the indoor controller board.
WThe indoor controller board should be
normal when voltage of AC 220~240V is
detected while fan motor is connected.
Refer to 9-7.
5Check outdoor fan motor.
67 Check operating condition of refrigerant
circuit.
(Heating mode)
1Check clogs of the filter.
2Remove shields.
4Measure the resistance of fan motor's
winding.
Measure the output voltage of fan's connector
(FAN) on the indoor controller board.
WThe indoor controller board should be
normal when voltage of AC 220~240V is
detected while fan motor is connected.
Refer to 9-7.
5Check outdoor fan motor.
6~8Check operating condition of refrigerant
circuit.
Abnormality of pipe temperature
<Cooling mode>
Detected as abnormal when the pipe tem-
perature is not in the cooling range 3 min-
utes later of compressor start and 6 min-
utes later of the liquid or condenser/evapo-
rator pipe is out of cooling range.
Note 1) It takes at least 9 min. to detect.
Note 2) Abnormality P8 is not detected in
drying mode.
Cooling range : -3 deg ] (TH-TH1)
TH: Lower temperature between: liquid
pipe temperature (TH2) and con-
denser/evaporator temperature (TH5)
TH1: Intake temperature
<Heating mode>
When 10 seconds have passed after the
compressor starts operation and the hot
adjustment mode has finished, the unit is
detected as abnormal when
condenser/evaporator pipe temperature is
not in 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 deg [ (TH5-TH1)
1~4Check pipe <liquid or condenser /
evaporator> temperature with room
temperature display on remote
controller and outdoor controller circuit
board.
Pipe <liquid or condenser / evaporator>
temperature display is indicated by
setting SW2 of outdoor controller circuit
board as follows.
23Check converse connection of extension
pipe or converse wiring of indoor/outdoor
unit connecting wire.
Conduct temperature check with outdoor
controller circuit board after connecting
‘A-Control Service Tool(PAC-SK52ST)’.
()
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