SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
March 2009
No. OCH453
SERVICE MANUAL
Indoor unit
[Model names]
PKA-RP35HAL
PKA-RP50HAL
[Service Ref.]
NOTE:
• This manual describes
only service data of the
indoor units.
• RoHS compliant products
have <G> mark on the
spec name plate.
PKA-RP35HAL
PKA-RP50HAL
CONTENTS
INDOOR UNIT
1. REFERENCE MANUAL................................... 2
2. SAFETY PRECAUTION................................... 3
3. PART NAMES AND FUNCTIONS................... 4
4. SPECIFICATIONS............................................ 6
5. NOISE CRITERION CURVES.......................... 7
6. OUTLINES AND DIMENSIONS....................... 8
7. WIRING DIAGRAM.......................................... 9
8. REFRIGERANT SYSTEM DIAGRAM............ 10
9. TROUBLESHOOTING.................................... 11
10. SPECIAL FUNCTION .....................................26
11. DISASSEMBLY PROCEDURE.......................29
PARTS CATALOG (OCB453)
1
REFERENCE MANUAL
OUTDOOR UNIT’S SERVICE MANUAL
Service Manual No.
Service Ref.
PUHZ-RP35/50/60/71VHA4
PUHZ-RP100/125/140VKA
PUHZ-RP100/125/140/200/250YKA
OCH451
OCB451
PU(H)-P71/100VHA#2.UK
PU(H)-P71/100/125/140YHA#2.UK
OC379
PUHZ-P100/125/140VHA3.UK
OCH415/OCB415
PUHZ-P200/250YHA3
OCH424/OCB424
PUHZ-HRP71/100VHA2
PUHZ-HRP100/125YHA2
OCH425/OCB425
2
2
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
Use new refrigerant pipes.
Do not use refrigerant other than R410A.
In case of using the existing pipes for R22, be careful with
the followings.
· For RP100, 125 and 140, be sure to perform replacement operation before test run.
· Change flare nut to the one provided with this product.
Use a newly flared pipe.
· Avoid using thin pipes.
If other refrigerant (R22 etc.) is used, chlorine in refrigerant 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.
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.
Use the following tools specifically designed for
use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant.
Contamination inside refrigerant piping can cause deterioration of refrigerant oil etc.
Gauge manifold
Charge hose
Gas leak detector
Torque wrench
Tools for R410A
Flare tool
Size adjustment gauge
Vacuum pump adaptor
Electronic refrigerant
charging scale
Store the piping to be used indoors during
installation, and keep both ends of the piping
sealed until just before brazing. (Leave elbow
joints, etc. in their packaging.)
Handle tools with care.
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of compressor.
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of compressor.
Use ester oil, ether oil or alkylbenzene oil (small
amount) as the refrigerant oil applied to flares
and flange connections.
Do not use a charging cylinder.
If large amount of mineral oil enters, that can cause deterioration of refrigerant oil etc.
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.
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.
[1] Cautions for service
(1) Perform service after recovering the refrigerant left in unit completely.
(2) Do not release refrigerant in the air.
(3) After completing service, charge the cycle with specified amount of refrigerant.
(4) 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.)
3
Unit
Gravimeter
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No.
1
Tool name
Specifications
Gauge manifold
· Only for R410A
· Use the existing fitting specifications. (UNF1/2)
· Use high-tension side pressure of 5.3MPa·G or over.
2
Charge hose
· Only for R410A
3
Electronic scale
4
Gas leak detector
· Use the detector for R134a, R407C or R410A.
5
Adaptor for reverse flow check
· Attach on vacuum pump.
6
Refrigerant charge base
7
Refrigerant cylinder
· Use pressure performance of 5.09MPa·G or over.
· Only for R410A
· Top of cylinder (Pink)
· Cylinder with syphon
8
3
Refrigerant recovery equipment
PART NAMES AND FUNCTIONS
Indoor unit
Filter
Louver
Air intake
Vane
Air outlet
4
˜ Wireless remote controller
CHECK TEST RUN display
CHECK and TEST RUN display indicate that
the unit is being checked or test-run.
MODEL SELECT display
Blinks when model is selected.
display
Lights up while the signal is transmitted to
the indoor unit when the button is pressed.
display
SET TEMP. display indicates the desired
temperature which is set.
CLOCK display
display
Displays the current time.
OPERATION MODE display
Operation mode display indicates which
operation mode is in effect.
TIMER display
CHECK TEST RUN
MODEL SELECT
°C
AMPM
AMPM
display
The vertical direction of air flow is indicated.
NOT AVAILABLE
ON/OFF
Used to change the fan speed.
MODE SELECT button
” display
”“
” display
button
MODE
FAN
AUTO STOP
VANE
AUTO START
each time the button is pressed.
FAN SPEED SELECT button
”“
Displays whether timer is on or off.
display
ON/OFF button
“
Displays the order of timer operation.
“
TEMP
FAN SPEED display indicates which fan
speed has been selected.
The unit is turned ON and OFF alternately
Displays when in timer operation or when
setting timer.
CHECK LOUVER
TEST RUN
SET
h
min
RESET
Used to switch the operation mode between
cooling, drying, heating, auto and fan mode.
SET TEMPERATURE button sets any desired
room temperature.
TIMER CONTROL buttons
AUTO STOP (OFF timer): when this switch
is set, the air conditioner will be
automatically stopped at the preset time.
AUTO START (ON timer): when this switch is
set, the air conditioner will be automatically
started at the preset time.
CLOCK
h and min buttons
Buttons used to set the “hour and minute” of
the current time and timer settings.
LOUVER button
CHECK-TEST RUN button
Changes left/right airflow direction.
(Not available for this model.)
Only press this button to perform an
inspection check or test operation.
Do not use it for normal operation.
CLOCK button
VANE CONTROL button
RESET button
Used to change the air flow direction.
SET button
5
INDOOR UNIT
INDOOR UNIT
4
SPECIFICATIONS
Service Ref.
Mode
Power supply (phase, cycle, voltage)
Input
Running current
External finish (Panel)
Heat exchanger
Fan
Fan (drive) % No.
Fan motor output
Airflow (Low-Middle-High)
External static pressure
Booster heater
Operation control & Thermostat
Noise level (Low-Middle-High)
Field drain pipe I.D.
Dimensions
W
D
H
Weight
Service Ref.
Mode
Power supply (phase, cycle, voltage)
Input
Running current
External finish (Panel)
Heat exchanger
Fan
Fan (drive) % No.
Fan motor output
Airflow (Low-Middle-High)
External static pressure
Booster heater
Operation control & Thermostat
Noise level (Low-Middle-High)
Field drain pipe I.D.
Dimensions
W
D
H
Weight
Cooling
0.04
0.40
kW
A
kW
*/min(CFM)
Pa(mmAq)
kW
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
0.04
0.40
kW
*/min(CFM)
Pa(mmAq)
kW
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
6
Single phase, 50Hz, 230V
Heating
Munsell 1.0Y 9.2/0.2
Plate fin coil
Line flow fan (direct) % 1
0.030
9-10.5-12 (320-370-425)
0 (direct blow)
–
Wireless remote controller & built-in
36-40-43
16 (5/8)
898 (35-3/8)
249 (9-13/16)
295 (11-5/8)
13 (29)
Cooling
kW
A
PKA-RP35HAL
PKA-RP50HAL
Single phase, 50Hz, 230V
0.03
0.30
Heating
Munsell 1.0Y 9.2/0.2
Plate fin coil
Line flow fan (direct) % 1
0.030
9-10.5-12 (320-370-425)
0 (direct blow)
–
Wireless remote controller & built-in
36-40-43
16 (5/8)
898 (35-3/8)
249 (9-13/16)
295 (11-5/8)
13 (29)
0.03
0.30
5
NOISE CRITERION CURVES
5-1. SOUND LEVELS
Sound level at anechoic room : Low-Middle-High
Sound level dB (A)
1.0m
PKA-RP35, 50HAL
1.0m
Measurement location
* Measured in anechoic room.
5-2. NOISE CRITERION CURVES
70.0
High
Low
Octave band pressure level (dB) 0dB=20μPa
65.0
60.0
NC-60
55.0
50.0
NC-50
45.0
40.0
NC-40
35.0
30.0
NC-30
25.0
Approximate minimum
audible limit on
continuous noise
20.0
NC-20
15.0
10.0
63
125
250
500
1k
2k
4k
Octave band center frequencies (Hz)
7
8k
36 - 40 - 43
0
16
28.5
41
78.5
91
103.5
116
166
178.5
203.5
232.5
253.5
77-:5.1
Tapping
screw hole
A
449
43
56
278.3
12.5
394
C
Knockout hole for piping
4-:9 Bolt hole
46
60
43
B
D
Min.50
550mm or greater with optional
Min.220
drain pump installation.
291.5
265
238
213
Mount board
Knockout hole
for left piping
Left side
:65~:80
Knockout hole
for lower piping
273.2
231.5
128.5
153.5
21.8
0
20
32.7
53.5
66
Indoor unit outline
:65~:80
C
55
55mm or greater with left
or rear left pipng or drain
pump installation.
Sleeve
Through hole
(purchased locally)
Min.150
Center measurement hole :2.5
59
Min.7
250mm or greater with optional
drain pump installation.
372.3
356.3
327.5
43
46
56
56
6
70
6
225
200
174
58
3.8
70
69
125
0
15
0
15
0
43
125
115
140
167
180.3
193.5
Min.50
Min.250
Required space (Indoor unit)
281
8
200
225
238
265
291.5
327.5
356.3
372.3
688
898
192
612
B
Mount board
Terminal block for
MA-remote controller (option)
Emergency operation switch
(cooling/heating)
Receiver
5
A
Terminal block for power supply (option)
Terminal block for outdoor unit
Knockout hole
for right piping
249
Right side
Drain hose
:16
O.D
Refrigerant pipe : :6.35
Liquid pipe Flared connection : 1/4F
Refrigerant pipe : :12.7
Gas pipe Flared connection : 1/2F
Size
DEFROST/STAND BY lamp
169
158
184
155
Front side
Top side
Operation lamp
Knockout hole
for lower piping
Under side
457 Gas pipe 539 Liquid pipe 610 Drain hose Front side (Grille open)
599
Louver (manual)
Vane (auto)
387
PKA-RP35HAL
PKA-RP35,50HAL PKA-RP50HAL
449
197
295
8
6
OUTLINES AND DIMENSIONS
Unit : mm
7
WIRING DIAGRAM
PKA-RP35HAL
PKA-RP50HAL
[Explanation of symbols]
Symbol
I.B
CN2L
CN32
CN41
CN51
CN90
DSA
FUSE
LED1
LED2
LED3
SW1
SW2
SWE
X1
ZNR01,02
CNP
Name
Indoor controller board
Connector (LOSSNAY)
Connector ( Remote switch)
Connector (HA terminal-A)
Connector (Centrally control)
Connector (Remote operation adapter)
Surge absorber
FUSE(T3.15AL250V)
Power supply (I.B)
Power supply (R.B)
Transmission (Indoor-outdoor)
Switch (Model selection) +See table 1
Switch (Capacity code) +See table 2
Connector (Emergency operation)
Relay (Drain pump (option))
Varistor
Drain pump (option) power supply
(Drain pump (option))
CN4F
R.B
TB6
Drain float switch (Drain pump (option))
Wired remote controller(option)
Terminal block (Remote controller transmission line)
Symbol
M
MS
S.W
SWE2
TB2
TB4
TB5
TH1
Name
Vane motor
Fan motor
Switch board
Emergency operation
Terminal block(Indoor unit Power (option))
Terminal block (Indoor/outdoor connecting line)
Terminal block (Remote controller transmission line(option))
Room temp. Thermistor
(0/15ΚΩ, 25/5.4ΚΩ Detect)
TH2
Pipe temp. Thermistor/liquid
(0/15ΚΩ, 25/5.4ΚΩ Detect)
TH5
Cond./eva. temp. Thermistor
(0/15ΚΩ, 25/5.4ΚΩ Detect)
Pcb for wireless remote controller
LED (Operation indication : Green)
LED (Preparation for heating: Orange)
Receiving unit
REACTOR
DRAIN PUMP (OPTION)
DRAIN FLOAT SWITCH (OPTION)
W.B
LED1
LED2
REC1
DCL
DP
FS
MS
3~
<Table 1>
SW1
(MODEL SELECTION)
DCL
I.B
CNMF
6
(WHT) FUSE
1
T11
DB1
ZNR01
U
SWE
ZNR02
U
LED1
ON
OFF
LED3
X1
LED2
1
Refer to
tables
1and 2
1 2
CN2L
(RED)
1
CN151
(WHT)
5
9
CN90
(WHT)
1
CN20
(RED)
1 2
CN41
(WHT)
1
CN44
(WHT)
4
4
1 CN32 3
(WHT)
1
1
CN4F
(WHT)
YLW
ORN
YLW
BLK
CN01
(BLK)
DSA
TB4
YLW
S1
ORN
S2
S3
SETTING
3
1
CNP(BLU)
CN3C 3
(BLU) 1
1 2 3 4 5
TO
OUTDOOR
UNIT
MODELS
M
1~
ORN
BRN
2
LDSWE(B) SWE2
CNRU
(WHT)
SETTING
1 2 3 4 5
RP35
S.W
1 2 3 4 5
RP50
W.B
6
ON
OFF
<Table 2>
SW2 (CAPACITY CODE)
DP
LDSWE(A)
(BLU)
5
CN51
(WHT)
1
3
5
ON
OFF
ON
OFF
RU
LD101(B) REC1
BLU
4
LED1
CN22 1
(BLU) 2
BLU
LED2
R.B
1
2
TB6
1
2
TB5
(OPTION PARTS)
M
t
○
t
○
TH1
t
TH2 TH5
○
When attaching
When attaching drain
drain pump(option), pump (option)
remove the jumper
1
4
connector CN4F
FLOAT SW
CN4F
and fit the drain
(WHT)
FS
float switch (FS).
+1(Fig. 1)
CN01
I.B
(BLK)
1
3
5
YLW
ORN
Notes:
1. SymboIs used in wiring diagram above are,
: Connector,
: Terminal (block).
I.B
2. Indoor and outdoor connecting wires have poIarities, make sure to match terminal
numbers (S1, S2, S3) for correct wirings.
1 3
3. Since the outdoor side electric wiring may change, be sure to check the outdoor unit
CN3C(BLU)
electric wiring diagram for servicing.
4. This diagram shows the wiring of indoor and outdoor connecting wires. (specification of
230V), adopting superimposed system for power and signal.
+1: When work to supply power separately for indoor and outdoor units apply, refer to Fig 1.
+2: For power supply system of this unit, refer to the caution label located near this diagram.
9
RED
BLU
GRN/YLW
YLW
ORN
ORN
BRN
TB2
L
N
POWER SUPPLY
~(1PHASE)
230V 50Hz
TB4
S1
S2
S3
INDOOR/OUTDOOR
COMMUNICATION
TO OUTDOOR
UNIT
8
REFRIGERANT SYSTEM DIAGRAM
PKA-RP35HAL
PKA-RP50HAL
Strainer (#50)
Heat exchanger
Refrigerant GAS pipe connection
(Flare)
Thermistor TH2
Pipe temperature(Liquid)
Thermistor TH5
(Cond./ Eva.temperature)
Refrigerant flow in cooling
Refrigerant flow in heating
Refrigerant LIQUID pipe connection
(Flare)
Thermistor TH1
(Room temperature)
Distributor
with strainer (#50/#50)
10
Strainer (#50)
9
TROUBLESHOOTING
9-1. TROUBLESHOOTING
<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 trouble reoccurrence at field are summarized in the table below. Check the contents
below before investigating details.
Unit conditions at service
Error code
Actions to be taken for service (summary)
Displayed
Judge what is wrong and take a corrective action according
to “9-3. Self-diagnosis action table”.
The trouble is reoccurring.
Not displayed
Conduct troubleshooting and ascertain the cause of the
trouble according to “9-4. Troubleshooting by inferior
phenomena”.
Consider 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
trouble occurred, matters related to wiring and etc.
Reset error code logs and restart the unit after finishing
service.
There is no abnormality in electrical component,
controller board, remote controller and etc.
Logged
The trouble is not reoccurring.
Re-check the abnormal symptom.
Conduct trouble shooting and ascertain the cause of the
trouble according to “9-4. Troubleshooting by inferior
phenomena”.
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
and etc.
Not logged
11
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.
<Malfunction-diagnosis method at maintenance service>
[Procedure]
Refrigerant
address
display
CHECK
CHECK
display
Temperature
button
TEMP
ON/OFF
1. Press the CHECK button twice.
• "CHECK" lights, and refrigerant
address "00" flashes.
• Check that the remote controller's
display has stopped before continuing.
2. Press the temperature
buttons.
• 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.)
ON/OFF
button
MODE
FAN
AUTO STOP
VANE
AUTO START
CHECK LOUVER
CHECK
button
min
TEST RUN
SET
h
RESET
CLOCK
HOUR
button
3. Point the remote controller at the • If an air conditioner error occurs, the
sensor on the indoor unit and
indoor unit's sensor emits an intermitpress the HOUR button.
tent buzzer sound, the operation light
flashes, and the error code is
output.
(It takes 3 seconds at most for error
code to appear.)
4. Point the remote controller at the • The check mode is cancelled.
sensor on the indoor unit and
press the ON/OFF button.
To be continued to the next page.
12
• Refer to the following tables for details on the check codes.
[Output pattern A]
Beeper sounds
OPERATION
INDICATOR
lamp flash
pattern
Beep
Beep Beep Beep
Off
Beep
1st
2 nd
3 rd
nth
On
On
On
On
Beep Beep
1st
Off
On
2 nd · · · Repeated
On
0.5 sec. Approx. 2.5 sec. 0.5 sec. 0.5 sec.
Self-check Approx. 2.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.
starts
(Start signal
Number of flashes/beeps in pattern indicates the check Number of flashes/beeps in pattern indicates
received)
code in the following table (i.e., n=5 for “P5”)
the check code in the following table
[Output pattern B]
Beeper sounds
OPERATION
INDICATOR
lamp flash
pattern
Beep
Beep Beep Beep
1st
Off
Self-check Approx. 2.5 sec.
starts
(Start signal
received)
On
Approx. 3 sec.
2nd
3 rd
On
On
On
0.5 sec. 0.5 sec. 0.5 sec.
Beep
Beep
nth
1st
On
Off
0.5 sec. Approx. 2.5 sec.
Number of flashes/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “U2”)
On
Approx. 3 sec.
Beep
2 nd · · · Repeated
On
On
0.5 sec. 0.5 sec.
Number of flashes/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
Symptom
INDICATOR lamp flashes
Check code
(Number of times)
1
P1
Intake sensor error
P2
Pipe (TH2) sensor error
2
P9
Pipe (TH5) sensor error
Indoor/outdoor unit communication error
3
E6,E7
4
P4
Drain sensor error/Float switch connector (CN4F) open
P5
Drain pump error
5
Forced compressor stop(due to water leakage abnormality)
PA
6
P6
Freezing/Overheating protection 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
12
Fb
Indoor unit control system error (memory error, etc.)
Remote controller transmission error
E0, E3
–
–
E1, E2
Remote controller control board error
[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)
Wireless remote controller Wired remote controller
Beeper sounds/OPERATION
Symptom
INDICATOR lamp flashes
Check code
(Number of times)
Indoor/outdoor unit communication error
1
E9
(Transmitting error) (Outdoor unit)
Compressor overcurrent interruption
2
UP
Open/short of outdoor unit thermistors
3
U3,U4
Compressor overcurrent interruption (When compressor locked)
4
UF
Abnormal high discharging temperature/49C worked/
5
U2
insufficient refrigerant
Abnormal high pressure (63H worked)/Overheating
U1,Ud
6
protection operation
Abnormal temperature of heat sink
U5
7
Outdoor unit fan protection stop
8
U8
9
Compressor overcurrent interruption/Abnormal of power module
U6
Abnormality of super heat due to low discharge temperature
10
U7
Abnormality such as overvoltage or voltage shortage and
11
U9,UH
abnormal synchronous signal to main circuit/Current sensor error
–
–
12
–
–
13
Others
Other errors (Refer to the technical manual for the outdoor unit.)
14
*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 sec.)” after the initial 2 beeps to confirm
the self-check start signal was received, the specified refrigerant address is incorrect.
• 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.
13
Remark
Remark
For details, check
the LED display
of the outdoor
controller board.
As for outdoor
unit, refer to
outdoor unit's
service manual.
• 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.
• 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)
For about 2
After LED 1, 2 are lighted, LED 2 is
PLEASE WAIT
minutes after turned off, then only LED 1 is
lighted. (Correct operation)
power-on
Cause
•For about 2 minutes following power-on,operation of the remote controller is not possible
due to system start-up. (Correct operation)
•Connector for the outdoor unit’s protection
Only LED 1 is lighted. →
device is not connected.
PLEASE WAIT → Error code
LED 1, 2 blink. •Reverse or open phase wiring for the outdoor
Subsequent to
unit’s power terminal block (L1, L2, L3)
about 2 minutes
after power-on Only LED 1 is lighted. →
Display messages do not
•Incorrect wiring between indoor and outdoor
appear even when operation
LED 1 blinks twice, units (incorrect polarity of S1, S2, S3)
switch is turned ON (operation
LED 2 blinks once. •Remote controller wire short
lamp does not light up).
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 microcomputer)
LED2 (power for remote controller)
Indicates whether control power is supplied. Make sure that this LED is
always lit.
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”.
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.
14
Note: Refer to the manual of outdoor unit for the details of display
such as F, U, and other E.
9-3. SELF-DIAGNOSIS ACTION TABLE
Error Code
P1
Abnormal point and detection method
Room temperature thermistor (TH1)
1 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 normally.)
2 Constantly detected during cooling,
drying, and heating operation.
Short: -90: or more
Open: -40: or less
Cause
1 Defective thermistor
characteristics
2 Contact failure of connector
(CN20) on the indoor controller
board (Insert failure)
3 Breaking of wire or contact
failure of thermistor wiring
4 Defective indoor controller
board
Countermeasure
1–3 Check 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.
2 Check 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.
4 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.
P2
Pipe temperature thermistor/Liquid
(TH2)
1 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 normally.)
2 Constantly detected during cooling,
drying, and heating (except defrosting)
operation
Short: 90: or more
Open: -40: or less
1 Defective thermistor
characteristics
2 Contact failure of connector
(CN44) on the indoor controller
board (Insert failure)
3 Breaking of wire or contact
failure of thermistor wiring
4 Defective refrigerant circuit is
causing thermistor temperature
of 90: or more or -40: or
less.
5 Defective indoor controller
board
1–3 Check resistance value of thermistor.
For characteristics, refer to (P1) above.
2 Check contact failure of connector (CN44) on
the indoor controller board. Refer to 9-7.
Turn the power on and check restart after
inserting connector again.
4 Check pipe <liquid> temperature with remote
controller in test run mode. If pipe <liquid>
temperature is extremely low (in cooling
mode) or high (in heating mode), refrigerant
circuit may have defective.
5 Check pipe <liquid> temperature with
remote controller in test run mode. If there is
extremely difference with actual pipe <liquid>
temperature, replace indoor controller board.
Turn the power off, and on again to operate
after check.
P4
P5
Contact failure of drain float switch
1 Contact failure of connector
(CN4F)
(Insert failure)
• Extract when the connector of drain float
switch is disconnected.
(3 and 4 of connector CN4F is not
2 Defective indoor controller
short-circuited.)
board
• Constantly detected during operation
1 Check contact failure of float switch connector.
Turn the power on again and check after
inserting connector again.
2 Operate with connector (CN4F) shortcircuited.
Replace indoor controller board if abnormality
reappears.
Drain over flow protection operation
1 Suspensive abnormality, if drain float
switch is detected to be underwater for
1 minute and 30 seconds continuously
with drain pump on.
Compressor and indoor fan will be
turned off.
2 Drain pump is abnormal if the condition
above is detected during suspensive
abnormality.
3 Constantly detected during drain pump
operation
1 Check if drain-up machine works.
2 Check drain function.
1 Malfunction of drain pump
2 Defective drain
Clogged drain pump
Clogged drain pipe
3 Defective drain float switch
Catch of drain float switch or
malfunction of moving parts
cause drain float switch to be
detected under water (Switch
On)
4 Defective indoor-controller
board
3 Remove drain float switch connector CN4F
and check if it is short (Switch On) with the
moving part of float switch UP, or OPEN with
the moving part of float switch down.
Replace float switch if it is short with the
moving part of float switch down.
4 Replace indoor controller board if it is shortcircuited between 3-4 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.
15
Error Code
P6
P8
Abnormal point and detection method
Freezing/overheating protection is working
1 Freezing protection (Cooling mode)
The unit is in 6-minute resume prevention mode if pipe <liquid or condenser/
evaporator> temperature stays under
-15: for 3 minutes, 3 minutes after the
compressor started. Abnormal if it stays
under -15: for 3 minutes again within
16 minutes after 6-minute resume prevention mode.
2 Overheating protection (Heating mode)
The units is in 6 minute resume
prevention mode if pipe <liquid or condenser/evaporator> temperature is
detected as over 70: after the compressor started. Abnormal if the temperature of over 70: is detected again
within 30 minutes after 6 minute resume
prevention mode.
Pipe temperature
<Cooling mode>
Detected as abnormal when the pipe temperature is not in the cooling range 3 minutes after compressor start and 6 minutes
after the liquid or condenser/evaporator
pipe is out of cooling range.
Note 1) It takes at least 9 minutes to
detect.
Note 2) Abnormality P8 is not detected in
drying mode.
Cooling range : -3 °C ] (TH-TH1)
TH: Lower temperature between: liquid
pipe temperature (TH2) and condenser/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.
Cause
(Cooling or drying mode)
1 Clogged filter (reduced airflow)
2 Short cycle of air path
3 Low-load (low temperature)
operation out of the tolerance
range
4 Defective indoor fan motor
• Fan motor is defective.
• Indoor controller board is defective.
Countermeasure
(Cooling or drying mode)
1 Check clogs of the filter.
2 Remove shields.
4 Refer to 9-6.
5 Defective outdoor fan control
6 Overcharge of refrigerant
7 Defective refrigerant circuit
(clogs)
5 Check outdoor fan motor.
67 Check operating condition of refrigerant
circuit.
(Heating mode)
1 Clogged filter (reduced airflow)
2 Short cycle of air path
3 Over-load (high temperature)
operation out of the tolerance
range
4 Defective indoor fan motor
• Fan motor is defective.
• Indoor controller board is defective.
5 Defective outdoor fan control
6 Overcharge of refrigerant
7 Defective refrigerant circuit
(clogs)
8 Bypass circuit of outdoor unit
is defective.
(Heating mode)
1 Check clogs of the filter.
2 Remove shields.
1 Slight 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
2 Converse connection of
extension pipe (on plural units
connection)
3 Converse wiring of indoor/
outdoor unit connecting wire
(on plural units connection)
4 Defective detection of indoor
room temperature and pipe
<condenser/evaporator>
temperature thermistor
5 Stop valve is not opened
completely.
1~4 Check 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.
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 [ (TH5-TH1)
16
4 Refer to 9-6.
5 Check outdoor fan motor.
6~8Check operating condition of refrigerant
circuit.
(
Conduct temperature check with outdoor
controller circuit board after connecting
‘A-Control Service Tool(PAC-SK52ST)’.
)
23Check converse connection of extension
pipe or converse wiring of indoor/outdoor
unit connecting wire.
Error Code
P9
Abnormal point and detection method
Pipe temperature thermistor/
Condenser-Evaporator (TH5)
1 The unit is in 3-minute resume protection 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.)
2 Constantly detected during cooling,
drying, and heating operation (except
defrosting)
Short: 90: or more
Open: -40: or less
Remote controller transmission
error(E0)/signal receiving error(E4)
1 Abnormal if main or sub remote controller cannot receive any transmission
normally from indoor unit of refrigerant
address “0” for 3 minutes.
(Error code : E0)
2 Abnormal if sub remote controller could
not receive any signal for 2 minutes.
(Error code: E0)
E0
or
E4
E3
or
E5
1 Abnormal if indoor controller board can
not receive any data normally from
remote controller board or from other
indoor controller board for 3 minutes.
(Error code: E4)
2 Indoor controller board cannot receive
any signal from remote controller for 2
minutes. (Error code: E4)
Countermeasure
Cause
1 Defective thermistor
1–3 Check resistance value of thermistor.
characteristics
For characteristics, refer to (P1) above.
2 Contact failure of connector
(CN44) on the indoor controller 2 Check contact failure of connector (CN44)
on the indoor controller board.
board (Insert failure)
Refer to 9-7.
3 Breaking of wire or contact
Turn the power on and check restart after
failure of thermistor wiring
inserting connector again.
4 Temperature of thermistor is
4 Operate in test run mode and check pipe
90: or more or -40: or less
<condenser/evaporator> temperature with
caused by defective refrigerant
outdoor controller circuit board. If pipe
circuit.
<condenser/evaporator> temperature is
extremely low (in cooling mode) or high (in
5 Defective indoor controller
heating mode), refrigerant circuit may have
board
defect.
5 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).
1 Contact failure at transmission
wire of remote controller
2 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.
3 Miswiring of remote controller
4 Defective transmitting receiving
circuit of remote controller
5 Defective transmitting receiving
circuit of indoor controller board
of refrigerant addresses “0”.
6 Noise has entered into the
transmission wire of remote
controller.
Remote controller transmission
error(E3)/signal receiving error(E5)
1 Abnormal if remote controller could not
find blank of transmission path for 6 seconds and could not transmit.
(Error code: E3)
2 Remote controller 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. (Error code: E3)
(
)
1 Check disconnection or looseness of indoor
unit or transmission wire of remote controller.
2 Set one of the remote controllers “main”
if there is no problem with the action above.
3 Check wiring of remote controller.
• Total wiring length: max. 500m
(Do not use cable x 3 or more.)
• The number of connecting indoor units:
max. 16 units
• The number of connecting remote controller: max. 2 units
When it is not the above-mentioned problem of
1~3
4 Diagnose remote controllers.
a) When “RC OK” is displayed,
Remote controllers have no problem.
Turn the power off, and on again to check.
If abnormality generates again, replace
indoor controller board.
b) When “RC NG” is displayed,
Replace remote controller.
c)When “RC E3” or “ERC 00-66” is displayed, noise may be causing abnormality.
* If the unit is not normal after replacing
indoor controller board in group control,
indoor controller board of address “0” may
be abnormal.
1 Set a remote controller to main, and the
1 2 remote controllers are set as
other to sub.
“main.”
(In case of 2 remote controllers)
2 Remote controller is connected 2 Remote controller is connected with only one
with 2 indoor units or more.
indoor unit.
3 Repetition of refrigerant
3 The address changes to a separate setting.
address
4 Defective transmitting receiving 4~6 Diagnose remote controller.
circuit of remote controller
a) When “RC OK” is displayed, remote controllers have no problem.
1 Abnormal if indoor controller board could 5 Defective transmitting receiving
Turn the power off,and on again to check.
not find blank of transmission path.
circuit of indoor controller board
When becoming abnormal again, replace
(Error code: E5)
6 Noise has entered into transmisindoor controller board.
2 Indoor controller board receives transsion wire of remote controller.
b) When “RC NG” is displayed, replace
mitted data at the same time and comremote controller.
pares the received and transmitted data.
c) When “RC E3” or “ERC 00-66” is disAbnormal if these data are judged to
played, noise may be causing abnormality.
be different 30 continuous times. (Error
code: E5)
17
Error Code
E6
E7
Fb
E1
or
E2
PA
Abnormal point and detection method
Indoor/outdoor unit communication
error (Signal receiving error)
1 Abnormal if indoor controller board
cannot receive any signal normally for 6
minutes after turning the power on.
2 Abnormal if indoor controller board
cannot receive any signal normally for 3
minutes.
3 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.
Countermeasure
Cause
1 Contact failure, short circuit or, * Check LED display on the outdoor control
circuit board. (Connect A-control service
miswiring (converse wiring) of
tool, PAC-SK52ST.)
indoor/outdoor unit connecting
Refer to outdoor unit service manual.
wire
1 Check disconnection or looseness of indoor/
2 Defective transmitting receiving
outdoor unit connecting wire of indoor unit or
circuit of indoor controller board
outdoor unit.
3 Defective transmitting receiving
Check all the units in case of twin triple
circuit of indoor controller board
indoor unit system.
4 Noise has entered into indoor/ 2-4 Turn the power off, and on again to check.
If abnormality generates again, replace
outdoor unit connecting wire.
indoor controller board or outdoor
controller circuit board.
* Other indoor controller board may have
defect in case of twin triple indoor unit
system.
Indoor/outdoor unit communication
1 Defective transmitting receiving 1-3 Turn the power off, and on again to check.
error (Transmitting error)
If abnormality generates again, replace
circuit of indoor controller board
Abnormal if “1” receiving is detected 30
indoor controller board.
2 Noise has entered into power
times continuously though indoor controller
supply.
board has transmitted “0”.
3 Noise has entered into outdoor
control wire.
Indoor controller board
Abnormal if data cannot be read normally
from the nonvolatile memory of the indoor
controller board.
1 Defective indoor controller
board
Remote controller control board
1 Defective remote controller
1 Abnormal if data cannot be read normally from the nonvolatile memory of the
remote controller control board.
(Error code: E1)
1 Replace indoor controller board.
1 Replace remote controller.
2 Abnormal if the clock function of remote
controller cannot be operated normally.
(Error code: E2)
Forced compressor stop
(due to water leakage abnormality)
1 The unit has a water leakage abnormality when the following conditions, a)
and b), are satisfied while the abovementioned detection is performed.
a) The intake temperature subtracted
with liquid pipe temperature detects
to be less than -10: 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
water for more than 15 minutes.
*Once the water leakage abnormality is
detected, abnormality state will not be
released until the main power is reset.
1 Drain pump trouble
1 Check the drain pump.
2 Drain defective
· Drain pump clogging
· Drain pipe clogging
2 Check whether water can be drained.
3 Open circuit of float switch
3 Check the resistance of the float switch.
4 Contact failure of float switch
connector
4 Check the connector contact failure.
5 Dew condensation on float
switch
· Drain water descends along
lead wire.
· Drain water waving due to
filter clogging.
5 Check the float switch leadwire mounted.
Check the filter clogging.
6 Extension piping connection
difference at twin, triple, quadruple system.
6 Check the piping connection.
7 Check the indoor/outdoor connecting wires.
7 Miswiring of indoor/outdoor
connecting at twin, triple, quadruple system.
8 Room temperature thermistor/ 8 Check the room temperature display of
remote controller.
liquid pipe temperature thermisCheck the indoor liquid pipe temperature distor detection is defective.
play of outdoor controller board.
18
9-4. TROUBLESHOOTING BY INFERIOR PHENOMENA
Note: Refer to the manual of outdoor unit 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.
1 Power supply of rated voltage is not supplied to outdoor unit.
2 Defective outdoor controller circuit board
3 Power supply of 220~240V is not supplied to indoor
unit.
4 Defective indoor controller board
(For the separate indoor/outdoor unit power supply system)
1 Power supply of 220~240V AC is not supplied to
indoor unit.
2 The connectors of the optional replacement kit are
not used.
3 Defective indoor controller board
• When LED1 on indoor controller board is lit.
1 Mis-setting of refrigerant address for outdoor unit
(There is no unit corresponding to refrigerant
address “0”.)
Countermeasure
1 Check the voltage of outdoor power
supply terminal block (L, N) or (L3, N).
• When AC 220~240V is not detected,
check the power wiring to outdoor unit
and the breaker.
• When AC 220~240V is detected, check
2 (below).
2 Check the voltage between outdoor
terminal block S1 and S2.
• When AC 220~240V is not detected,
—check the fuse on outdoor controller
circuit board.
—check the wiring connection.
• When AC 220~240V is detected, check
3 (below).
3 Check the voltage between indoor terminal block S1 and S2.
• When AC 220~240V is not detected,
check indoor/outdoor unit connecting
wire for miswiring.
• When AC 220~240V is detected,
check 4 (below).
4 Check the fuse on indoor controller
board.
Check the wiring connection.
If no problem are found, indoor controller
board is defective.
1 Check the voltage of indoor power supply
terminal block (L,N).
• When AC220~240V is not detected,
check the power supply wiring.
• When AC220~240V is detected,
check 2 (below).
2 Check that there is no problem in the
method of connecting the connectors.
• When there are problems in the method
of connecting the connectors,
connect the connector correctly referring to installation manual of an optional
kit.
• When there is no problem in the method of connecting the connectors,
check 3 (below).
3 Check the fuse on indoor controller
board.
Check the wiring connection.
If no problem are found, indoor controller
board is defective.
1 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.
19
Note: Refer to the manual of outdoor unit for the detail of remote
controller.
Phenomena
(2)LED2 on indoor controller board
is blinking.
Cause
Countermeasure
• When LED1 on indoor controller board is also blinking. Check indoor/outdoor unit connecting wire
Connection failure of indoor/outdoor unit connecting for connection failure.
wire
• When LED1 is lit.
1 Check the connection of remote controller wires in case of twin triple indoor
1 Miswiring of remote controller wires
Under twin triple indoor unit system, 2 or more indoor
unit system. When 2 or more indoor units
units are wired together.
are wired in one refrigerant system,
connect remote controller wires to one of
those units.
2 Refrigerant address for outdoor unit is wrong or not 2 Check the setting of refrigerant address
set.
in case of grouping control system.
Under grouping control system, there are some units
If there are some units whose refrigerant
whose refrigerant address is 0.
addresses are 0 in one group, set one of
the units to 0 using SW1 (3-6) on outdoor
controller circuit board.
34 Remove remote controller wires and
3 Short-cut of remote controller wires
check LED2 on indoor controller board.
4 Defective remote controller
• When LED2 is blinking, check the shortcut 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.
(3)Upward/downward vane
performance failure
1 The vane is not downward during defrosting and heat 1 Normal operation (The vane is set to
horizontal regardless of remote control.)
preparation and when the thermostat is OFF in HEAT
mode. (Working of COOL protection function)
2 Vane motor does not rotate.
2 Check 2 (left).
• Defective vane motor
• Check the vane motor. (Refer to “How
• Breaking of wire or connection failure of connector
to check the parts”.)
• Check for breaking of wire or connection failure of connector.
3 Normal operation (Each connector on
3 Upward/downward vane does not work.
vane motor side is disconnected or set• The vane is set to fixed position.
ting the fixed vanes by wired remote
controller.)
(4)Receiver for wireless remote
controller
1 Weak batteries of wireless remote controller.
1 Replace batteries of wireless remote controller.
2~4
2 Contact failure of connector (CNB) on wireless
remote controller board
Check contact failure of each connector.
If no problems are found of connector,
(Insert failure)
replace indoor controller board.
3 Contact failure of connector (CN90) on indoor controller board (Insert failure)
When the same trouble occurs even if
indoor controller board is replaced,
4 Contact failure of connector between wireless remote
replace wireless remote controller
controller board and indoor controller board
board.
20
9-5. EMERGENCY OPERATION
9-5-1. When wireless remote controller fails or its battery is exhausted
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.
DEFROST/STAND BY lamp (ORANGE)
Operation lamp (GREEN)
Emergency operation switch (cooling/heating)
Receiver
E.O.
SW
• Each press of the emergency operation switch will toggle the
operation mode.
• Check “COOL/HEAT” with the operation monitor display. (The display will
appear orange for 5 seconds after pressing the emergency operation switch.)
[Heat pump type]
Cooling
Heating
Stop
[Cooling Only type]
Cooling
Stop
Operation Monitor Display
GREEN
ORANGE
STOP
The orange lamp follows the switch operation
as indicated at the left for 5 sedonds, and
then it will return to the normal display.
COOL
HEAT
Turning off
Lighting
* Details of emergency mode are as shown below.
Operation Mod
Set Temperature
Fan Speed
Airflow Direction Up and Down
COOL
24°C
High
Horizontal
HEAT
24°C
High
Downward
9-5-2. When wired remote controller or indoor unit microcomputer fails
1. When the wired remote control or the indoor unit microcomputer has failed, but all other components work properly,
if you set the switch (SWE) on the indoor controller board ON, the indoor unit will begin 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 microcomputer 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.
• when 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.
21
9-6. HOW TO CHECK THE PARTS
PKA-RP35HAL
PKA-RP50HAL
Parts name
Check points
Room temperature
thermistor (TH1)
Disconnect the connector then measure the resistance using a tester.
(At the ambient temperature 10~30)
Liquid pipe temperature
thermistor (TH2)
Condenser / Evaporator
temperature thermistor
(TH5)
Vane motor (MV)
Red
Yellow
Brown
Connect pin No.
Normal
Abnormal
4.3k~9.6k
Open or short
Measure the resistance between the terminals using a tester. (Coil temperature 25)
Normal
Abnormal
-
-
-
-
Brown-Red Brown-Orange Brown-Yellow Brown-Green
Open or short
M
Orange Green
Refer to the thermistor.
350 ± 7%
Fan motor (MF)
Refer to 9-6-2.
9-6-1. Thermistor
<Thermistor Characteristic graph>
Room temperature thermistor (TH1)
Pipe temperature thermistor/liquid (TH2)
Condenser/evaporator temperature thermistor (TH5)
Thermistor R0=15k' ± 3%
Fixed number of B=3480 ± 2%
Rt=15exp { 3480(
0:
10:
20:
25:
30:
40:
1
273+t
40
Resistance (k)
Thermistor for
lower temperature
< Thermistor for lower temperature >
50
1
)}
273
15k'
9.6k'
6.3k'
5.4k'
4.3k'
3.0k'
30
20
10
0
22
-20 -10 0 10 20 30 40 50
Temperature ()
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 connecter (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 turn around.
Wiring contact check
Contact of fan motor connector (CNMF)
Is there contact failure?
Wiring recovery
Yes
No
Power supply check (Remove the connector (CNMF))
Measure the voltage in the indoor controller circuit board.
TEST POINT : VDC (between 1 (+) and 3 (-) of the fan connector): VDC DC310~340V
TEST POINT : VCC (between 4 (+) and 3 (-) of the fan connector): VCC DC15V
Is the voltage normal?
No
Indoor controller board fuse check
Yes
No
Is the fuse normal?
Replace
the fuse.
Yes
Replace the indoor
controller board.
NG
Check the operation
OK
Check the operation
END
NG
Replace the fan motor.
Sensor signal check
Measure the voltage between CNMF and DC 0V
and DC 15V in the indoor controller circuit board.
No
Does the voltage repeat
DC 0V and DC 15V?
Replace the fan motor.
Yes
Yes
Check the operation of fan.
Replace the indoor
controller board.
NG
Replace the indoor controller board.
OK
Check the operation
OK
END
NG
Replace the fan motor.
23
END
OK
END
9-7. TEST POINT DIAGRAM
Indoor controller board
PKA-RP35HAL
PKA-RP50HAL
CNMF
Connect to the
fan motor (MF)
1-3 : DC310~340V
4-3 : DC15V
5-3 : DC0~6.5V
6-3 : DC0 or DC15V
CN01
Connect to the
Terminal block (TB4)
1-3 : 220-240VAC
SWE
Emergency
operation connector
FUSE
(3.15A 250V)
CNP
Drain pump output
(220-240VAC) (option)
SW1
{
Model selection
LED1:Power supply (I.B)
LED2:Power supply (R.B)
LED3:Transmission
(Indoor/outdodr)
CN3C
Transmission
(Indoor/outdodr)
(DC 0~24V)
SW2
Capacity setting
CN22
Connect to the terminal
block (TB5) (Remote
controller connecting
wire) (option)
CN151
CN4F
Connect to the
vane motor (MV)
Float switch (FS) (option)
CN32
Remote switch
CN90
Connect to the remote
operation adapter
Jumper wire J41,J42
CN51
Pair No. setting for
wireless remote controller
CN20
Room temp.
thermistor (TH1)
CN44
CN2L
Connector
(LOSSNAY)
CN41
Connector
(HA terminal-A)
Pipe temperature thermistor
1-2 : Liquid (TH2)
3-4 : Condenser/Evaporator
(TH5)
SWE2
Emergency
operation switch
Wireless remote controller board
24
Centrally control
9-8. FUNCTIONS OF DIP SWITCH AND JUMPER WIRE
Each function is controlled by the dip switch and the jumper wire on control P.C. board.
(Marks in the table below)
Jumper wire
Functions
SW1
Model
settings
Setting by the dip switch and jumper wire
MODELS
PKA-RP·HAL
MODELS
SW2
Capacity
settings
PKA-RP35HAL
PKA-RP50HAL
J41
J42
Pair number
setting with
wireless
remote
controller
JP3
Indoor
controller
board type
setting
Jumper wire (
: Short
: Open)
Remarks
SETTING
1 2 3 4 5
ON
OFF
SETTING
1 2 3 4 5
1 2 3 4 5
ON
OFF
ON
OFF
Wireless remote Control PCB setting
controller setting
J41
J42
0
1
2
3~9
Indoor controller board type
For product
Service parts
JP3
25
<Initial setting>
Wireless remote controller: 0
Control PCB: (for both J41 and J42)
4 pair number settings are supported.
The pair number settings of the wireless remote
controller and indoor control PCB (J41/J42) are
given in the table on the left.
(' ' in the table indicates the jumper wire is disconnected.)
: With JP3
: Without JP3
10
SPECIAL FUNCTION
10-1. ROTATION FUNCTION(AND BACK-UP FUNCTION, 2ND STAGE CUT-IN FUNCTION)
Optional wired remote controller with terminal bed (PAR-21MAAT-E) are necessary for PKA type.
10-1-1. Operation
(1) Rotation function (and Back-up function)
• Outline of functions
· Main and sub unit operate alternately according to the interval of rotation setting.
w 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 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)
Fig. 1
Operation pattern
[Back-up function only]··· Request code number "312"
Error occurs on main unit.
Main
Sub
Start operation
Main
unit
IC-1
Sub
unit
IC-2
Refrigerant address
"00"
Run
Abnormal condition
Stop
Run
3(2)
[Rotation function] & [Back-up function]··· Request code number "313~318"
Start operation
Sub
unit
IC-2
3(2)
Main
Sub
Main
Error occurs on main unit.
Sub Main
Sub
Run
Stop
Run
Stop
Run
Stop
1~28 days
Abnormal condition
Sub
unit
IC-2
IC-1
2
Main
unit
IC-1
OC-2
OC-1
Main
unit
Refrigerant address
"01"
2
RC
OC : Outdoor unit
IC : Indoor unit
RC : Wired remote controller
Run
1~28 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 OFF operation,the unit which was operationg will start
operation.
· To operate the main unit, refer to the 10-1-2. and set the requet code No. which is not the same as the current one, and set
again the former request code No.
(2) 2nd stage cut-in function
Outline of functions
· When the 1st unit can NOT supply with 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 4degrees C below set point *, the 2nd unit stops operation automatically.
(* set point = set temperature by R/C (remote controller) + 4, 6, 8: (selectable) )
· Number of operating units is determined according to the room temperature and set point.
· When room temperature becomes higher than set point, standby unit starts. (2 units operation)
· When room temperature falls below set point -4:, standby unit stops. (1 unit operation)
26
• System constraint
· This function is available only in cooling mode.
Ex.) Set temp. by R/C = 20:
Set point = 26:
When request code number is “323”.
26:
2nd unit Cut-in
[2nd stage cut-in function]··· Request code number "322~324"
Start operation
Main
unit
IC-1
Room temp. Set point
Sub unit start operation
Room temp. < Set point -4
Sub unit stop
Run
4 degree C
22:
2nd unit Cut-out
Sub
unit
IC-2
Stop
Run
20:
10-1-2. 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)
Initial
setting
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)
Initial
setting
Setting contents
Monitoring the request code of current setting.
Cut-in function OFF
Cut-in function ON(Set point = Set temp.+ 4(7.2F)
Cut-in function ON(Set point = Set temp.+ 6(10.8F)
Cut-in function ON(Set point = Set temp.+ 8(14.4F)
27
Stop
(2) Setting method of each function by wired remote controller
B: Refrigerant address
C: Data display area
D: Request code display area
1. Stop operation(
).
2. Press the TEST button () for 3 seconds so that [Maintenance mode] appears on the screen ().
After a while, [00] appears in the refrigerant address number display area.(at )
3. Press the CHECK button () for 3 seconds to switch to [Maintenance monitor].
Note) It is not possible to switch to [Maintenance monitor] during data request in maintenance mode
(i.e., while “----” is blinking) since no buttons are operative.
[----] appears on the screen () when [Maintenance monitor] is activated.
(The display () now allows you to set a request code No.)
4. Press the [TEMP (
[ScreenB]
5. Press the [CLOCK (
and
)] buttons () to select the desired refrigerant address.
and
)] buttons () to set the desired request code No.(“311~318”, “321~324”)
6. Press the FILTER button () to perform function setting.
If above setting operations are done correctly, "Request code number will appear in data display area.()
[Example: When the "311" of "Request code number" is set, [311] appears on the screen.()]
[Refererence]
You can check current "request code number" setting by setting the "request code number"(“310” or “320”) and
pressing the FILTER button.()
[Example: When the current setting is "Setting No.2(Request code 311)", [311] appears on the screen.()]
7. To return to normal mode, press the ON/OFF button (
).
28
11
DISASSEMBLY PROCEDURE
PKA-RP35HAL
PKA-RP50HAL
Be careful when removing heavy parts.
OPERATION PROCEDURE
PHOTOS & ILLUSTRATIONS
1. REMOVING THE LOWER SIDE OF THE INDOOR
UNIT FROM THE INSTALLATION PLATE
Figure 1
(1) Remove the front panel.
(2) Insert the screw driver to the corner hole at both left and
right side as shown in the figure 1.
(3) Push it up, then pull down the lower side of indoor unit and
remove the hook.
Push
Corner hole
Be careful
not to damage
the airflow
adjustment
plate with the
screw driver. Push
2. REMOVING THE FRONT PANEL
(1) Press and unlock the knobs on both sides of the front
panel and lift the front panel until it is level. Pull the hinges
forward to remove the front panel. (See Photo 2)
(2) Move the horizontal vanes in a downward direction.
(3) Remove the screw caps of the panel. Remove the screws.
(See Photo 1)
(4) Hold the lower part of both ends of the panel and pull it
slightly toward you, and then remove the panel by pushing
it upward.
Photo 1
Vane
Front panel
Screw caps
Photo 2
29
Down
OPERATION PROCEDURE
PHOTOS
3. REMOVING THE INDOOR CONTROLLER BOARD
AND WIRELESS CONTROLLER BOARD
Photo 3
(1) Remove the front panel. (Refer to 2.)
(2) Remove the room temp. thermistor TH1. (see Photo 3)
(3) Remove the electrical box covers (screw 4 × 12).
(See Photo 3)
(4) Disconnect the connectors on the indoor controller board.
(5) Remove the switch board cover.
(6) Pull out the indoor controller board toward you, then
disconnect the rest of connectors.
Remove the indoor controller board and switch board.
(7) Remove the holder of wireless controller board.
(8) Disconnect the connector of wireless controller board and
remove the wireless controller board from the holder.
Photo 5
Screw of electrical box
cover (side) & clamp
Screw (top cover)
Room temp.
thermistor
(TH1)
Screw
(side
cover)
Nozzle assembly Switch board cover Holder of wireless
controller board
Photo 4
Room temp.
thermistor (TH1)
Electrical box cover (top) Electrical box
Screw (side cover)
cover (side)
Terminal
block (TB4)
Indoor controller board (I.B)
(45)
Clamp
Electrical box cover (side)
Caution:
In the case that room temp. thermistor is fixed with the screw of electrical
box cover (side), keep 45mm between
the bottom end of clamp and the top of
room temp. thermistor as Photo 5.
4. REMOVING THE ELECTRICAL BOX
Fixture
(right)
Room temp. thermistor (TH1)
Photo 6
(1) Remove the front panel. (Refer to 2.)
(2) Remove the electrical box covers. (See Photo 3)
(3) Remove the nozzle assembly. (Refer to 5.)
(4) Disconnect the indoor/outdoor connecting wire from terminal block (TB4).
(5) Disconnect the connectors on the indoor controller board.
(6) Disconnect the connector for the ground wire. (See Photo 6)
(7) Pull the disconnected lead wire out from the electrical box.
(8) Remove the screw of electrical box. (See Photo 7)
(9) Push up the upper fixture (See Photo 6) catch to remove
the box, then pull the right fixture (See Photo 4) and
remove it from the box fixture.
Fixture (upper)
Connector for
ground wire
Photo 7
Screw (Electrical box)
30
OPERATION PROCEDURE
PHOTOS
5. REMOVING THE NOZZLE ASSEMBLY (with VANE
and VANE MOTOR) AND DRAIN HOSE
Photo 8
(1) Remove the front panel (Refer to 2.).
(2) Remove the electrical box cover.
(3) Disconnect the vane motor connector (CN151) on the
indoor controller board.
(4) Remove the corner box.
(5) Pull the nozzle assembly and detach.
(6) Push the fixture and remove the drain hose.
Electrical box cover (side)
Electrical box cover (top)
Screw (side cover)
Screw (top cover)
Switch board cover
Holder of wireless
Nozzle assembly
controller board
6. REMOVING THE INDOOR FAN MOTOR AND THE
LINE FLOW FAN
(1) Remove the front panel (Refer to 2.) and the corner box
at right lower side.
(2) Remove the electrical box (Refer to 4.) and the nozzle
assembly (Refer to 5.).
(3) Remove the screws fixing the motor bed. (See Photo 9)
(4) Loosen the screw fixing the line flow fan. (See Photo 10)
(5) Remove the motor bed together with fan motor and motor
band.
(6) Release the hooks of the motor band. Remove the motor
band. Pull out the indoor fan motor.
(7) Remove the screws fixing the left side of the heat exchanger.
(See Photo 11)
(8) Lift the heat exchanger, and pull out the line flow fan to the
lower-left.
Photo 11
Photo 9
Motor band
Water cover
Heat
exchanger
Screw of the motor bed
Photo 10
Screw of the
left side of the
heat exchanger
7. REMOVING THE VANE MOTOR
Screw
(side
cover)
Screw of the
line flow fan
Photo 12
Screws of the vane
motor unit
(1) Remove the nozzle assembly. (Refer to 5.)
(2) Remove the screws of the vane motor unit, and pull out
the vane motor unit.
(3) Remove the screws of the vane motor unit cover.
(4) Remove the vane motor from the vane motor unit.
(5) Disconnect the connector from the vane motor.
Screws of the vane motor unit cover
8. REMOVING THE LIQUID PIPE THERMISTOR AND
COND/EVA TEMP. THERMISTOR
(1)
(2)
(3)
(4)
(5)
Remove the front panel. (Refer to 2)
Remove the electrical box cover.
Remove the motor band.
Cut the wiring fixed band.
Remove the liquid pipe thermistor and cond/eva temp. thermistor.
(6) Disconnect the connector (CN44) on the indoor
controller board.
Photo 13
Condenser/evaporator temp.
thermistor (TH5)
Heat exchanger
Liquid pipe thermistor (TH2)
31
OPERATION PROCEDURE
9. REMOVING THE HEAT EXCHANGER
(1) Remove the front panel (Refer to 2.) and the corner panel
at right lower side.
(2) Remove the electrical box (Refer to 4.) and the nozzle
assembly (Refer to 5.).
(3) Remove the motor band.
(4) Remove the pipe thermistors (Refer to 8.).
(5) Disconnect the connector (CN60) on the indoor controller
board and the connector for ground wire. (See Photo 6)
(6) Remove the screws fixing the left side of the heat
exchanger. (See Photo 10)
(7) Remove the heat exchanger.
10. REMOVING THE ROOM TEMPERATURE THERMISTOR
(1)
(2)
(3)
(4)
Remove the front panel (Refer to 2.).
Remove the electrical box cover.
Remove the room temperature thermistor.
Disconnect the connector (CN20) on the indoor controller
board.
NOTE: When room temp. thermistor is replaced, be sure
to use service parts No. R01 N20 202.
Photo 16
PHOTOS
Photo 14
Heat exchanger
Water cover
Electrical box cover (side)
Electrical box cover (top)
Screw (side cover)
Screw (top cover)
Switch board cover
Holder of wireless
Nozzle assembly
controller board
Screw
(side
cover)
Photo 15
Indoor controller board (I.B)
Terminal
block (TB1)
Room temp. thermistor
(TH1)
Wire clip
Caution:
There is a case that room
temp. thermistor (TH1) is
fixed with electrical box
side cover screw.
Fixture
(right)
Room temp. thermistor (TH1)
HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
CCopyright 2009 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Distributed in Mar. 2009 No.OCH453 PDF 7
Made in Japan
New publication, effective Mar. 2009
Specifications subject to change without notice