Mitsubishi Electric Mr.SLIM PCA-RP50KAQ User manual

SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
No. OCH491
INDOOR UNIT
CONTENTS
1. REFERENCE MANUAL...................................2
2. SAFETY PRECAUTION...................................3
3. PART NAMES AND FUNCTIONS....................4
4. SPECIFICATIONS............................................7
5. NOISE CRITERION CURVES ...................... 10
6. OUTLINES AND DIMENSIONS.....................12
7. WIRING DIAGRAM
.............................................
15
8. REFRIGERANT SYSTEM DIAGRAM
.............
16
9. TROUBLESHOOTING................................... 17
10. SPECIAL FUNCTION.....................................32
11. DISASSEMBLY PROCEDURE.......................35
Indoor unit
[Model names] [Service Ref.]
PCA-RP50KAQ PCA-RP50KAQ
PCA-RP60KAQ PCA-RP60KAQ
PCA-RP71KAQ PCA-RP71KAQ
PCA-RP100KAQ PCA-RP100KAQ
PCA-RP125KAQ PCA-RP125KAQ
PCA-RP140KAQ PCA-RP140KAQ
December 2010
NOTE:
• This manual describes only
service data of the indoor
units.
• RoHS compliant products
have <G> mark on the
spec name plate.
PARTS CATALOG (OCB491)
Model name
indication
WIRED REMOTE
CONTROLLER
(Option)
WIRELESS REMOTE
CONTROLLER
(Option)
ON/OFF TEMP
ON/OFF
TEMP.

2
1-1. OUTDOOR UNIT’S SERVICE MANUAL
1-2. TECHNICAL DATA BOOK
REFERENCE MANUAL
1
Service Ref. Service Manual No.
PUHZ-RP50/60/71VHA4
PUHZ-RP100/125/140VKA
PUHZ-RP100/125/140/200/250YKA
PUHZ-RP200YKAR1
OCH451
OCB451
PU(H)-P71/100VHAR3.UK
PU(H)-P71/100/125/140YHAR3.UK OC379
PUHZ-P100/125/140VHA3R2.UK
PUHZ-P100/125/140YHAR1.UK OCH415 / OCB415
PUHZ-P200/250YHA3R2 OCH424 / OCB424
SUZ-KA50/60/71VA2.TH OCH472
SUZ-KA50/60/71VA2.TH-A OCH473
Series (Outdoor unit) Manual No.
SUZ-KA • VA OCS03
PUHZ-RP • HA4
PUHZ-RP • KA OCS16
PUHZ-P • VHA3
PUHZ-P • YHAR3 OCS17
Note:
The phrase "Wired remote controller" in this service manual refers only to the PAR-21MAA.
If you need any information for the PAR-30MAA, please refer to the instruction book included in PAR-30MAA box.

3
SAFETY PRECAUTION
2
Cautions for units utilising refrigerant R410A
2-2. 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 contaminants
such as sulfur, oxides, dirt, shaving particles, etc,
which are hazard to refrigerant cycle.
In addition, use pipes with specified thickness.
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.)
The refrigerant oil applied to flare and flange
connections must be ester oil, ether oil or
alkylbenzene oil in a small amount.
In case of using the existing pipes for R22, be careful with
the followings.
· For RP100, 125 and 140, be sure to perform replace-
ment operation before test run.
· 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.
Handle tools with care.
If dirt, dust or moisture enters 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 enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
If large amount of mineral oil enters, 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 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.)
2-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply
circuits must be disconnected.

4
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
Gravimeter
Unit
●Indoor Unit
PART NAMES AND FUNCTIONS
3
Air outlet
Louver
Vane
Air intake Filter
(Inside of Air intake)
No. Tool name 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 —

5
Wireless remote controller (Option)
ON/OFF TEMP
FAN
VANE
TEST RUN
AUTO STOP
AUTO START
h
min
LOUVER
MODE
CHECK
RESETSET CLOCK
MODEL
SELECT
NOTAVAILABLE
SWING
CHECK
FAN
TEST
RUN
°F
°C
AMPMSTOP
START
AMPM
COOL
DRY
AUTO
FAN
HEAT
VANE CONTROL button
Changes 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
Changes left / right airflow direction.
(Not available for this model.)
MODE SELECT button
Switches the operation mode between
COOLING/DRY/FAN/HEATING and AUTO
mode.
+In case the outdoor unit is cooling only
type, the heating and auto mode are not
available.
CHECK-TEST RUN button
Performs an inspection check or test
operation. Do not use it for normal
operation.
FAN SPEED SELECT button
Changes the fan speed.
TIMER display
Displays when in timer operation or when
setting timer.
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.
Buttons used to set the “hour and minute” of
the current time and timer settings.
"h" and "min" buttons
Temperature setting display
Indicates the desired temperature setting
which is set.
display
Displays selected fan speed.
display
The vertical direction of airflow is indicated.
display
Blinks when model is selected.
display
Lights up while the signal is transmitted to
the indoor unit when the button is pressed.
display
Indicate that the unit is being checked or
test-run.
OPERATION MODE display
OPERATION MODE display
Indicates which operation mode is in effect.
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.
MODEL SELECT
CHECK TEST RUN

6
°F°C
°F°C
ERROR CODE
AFTER
TIMER
TIME SUN MON TUE WED THU FRI SAT
ON
OFF
Hr
AFTER
FILTER
FUNCTION
ONLY1Hr.
WEEKLY
SIMPLE
AUTO OFF
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
•
•
Display Section
For purposes of this explanation,
all parts of the display are shown.
During actual operation, only
the relevant items will be lit.
Identifies the current operation
Shows the operating mode, etc.
*Multilanguage display is available.
“Centrally Controlled” indicator
Indicates that operation from the
remote controller has been prohib-
ited by a master controller.
“Timer is Off” indicator
Indicates that the timer is off.
Temperature Setting
Shows the target temperature.
Day-of-Week
Shows the current day of the week.
Time/Timer Display
Shows the current time, unless the simple or Auto Off
timer is set.
If the simple or Auto Off timer is set, the time to be
switched off is shown.
“Sensor” indication
Displays when the remote controller
sensor is used.
“Locked” indicator
Indicates that remote controller but-
tons have been locked.
“Clean The Filter” indicator
To be displayed on when it is time to
clean the filter.
Timer indicators
The indicator comes on if the corre-
sponding timer is set.
Up/Down Air Direction indica-
tor
The indicator shows the direc-
tion of the outcoming airflow.
“One Hour Only” indicator
Room Temperature display
Shows the room temperature. The room
temperature display range is 46–102˚F.
The display blinks if the temperature
is less than 46˚F or 102˚F or more.
Louver display
Indicates the action of the swing louver.
Does not appear if the louver is not
running.
(Power On indicator)
Indicates that the power is on.
Fan Speed indicator
Shows the selected fan speed.
Ventilation indicator
Appears when the unit is running in
Ventilation mode.
Operation Section
Temperature setting buttons
Down
Up
Timer Menu button
(Monitor/Set button)
Mode button (Return button)
Set Time buttons
Back
Ahead
Timer On/Off button
(Set Day button)
Opening the
cover
ON/OFF button
Fan Speed button
Filter button
(<Enter> button)
Test Run button
Check button (Clear button)
Airflow Up/Down button
Louver button
( Operation button)
To return operation
number
Ventilation button
( Operation button)
To go to next operation
number
Note:
“PLEASE WAIT” message
This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure.
“NOTAVAILABLE” message
This message is displayed if an invalid button is pressed (to operate a function that the indoor unit does not have).
If a single remote controller is used to operate multiple indoor units simultaneously that are different types, this message will not be displayed as
far as any of the indoor units is equipped with the function.
Built-in temperature sensor
Displays if the airflow is set to
low or downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off in 1 hour,
when the airflow direction
also changes.
Wired remote controller (Option)

77
SPECIFICATIONS
4
Single phase, 50Hz, 230V
Munsell 6.4Y 8.9/0.4
Plate fin coil
Sirocco fan (direct) x 3
0.095
15-16-17-19(530-565-600-670)
0(direct blow)
Remote controller & built-in
33-35-37-40
26(1)
1,280(50-3/8)
680(26-3/4)
230(9-1/16)
32(71)
Cooling
0.06
0.39
Heating
0.06
0.39
PCA-RP60KAQ
kW
A
kW
*/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
External finish
Heat exchanger
Fan Fan(drive) × No.
Fan motor output
Airflow(Low-Medium2-Medium1-High)
External static pressure
Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Field drain pipe O.D.
Dimensions
Weight
W
D
H
INDOOR UNIT
Cooling
0.05
0.37
Heating
0.05
0.37
Single phase, 50Hz, 230V
Munsell 6.4Y 8.9/0.4
Plate fin coil
Sirocco fan (direct) x 2
0.090
10-11-13-15(355-390-460-530)
0(direct blow)
Remote controller & built-in
32-34-37-40
26(1)
960(37-13/16)
680(26-3/4)
230(9-1/16)
25(55)
PCA-RP50KAQ
kW
A
kW
*/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
External finish
Heat exchanger
Fan Fan(drive) × No.
Fan motor output
Airflow(Low-Medium2-Medium1-High)
External static pressure
Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Field drain pipe O.D.
Dimensions
Weight
W
D
H
INDOOR UNIT
Cooling
0.06
0.42
Heating
0.06
0.42
PCA-RP71KAQ
kW
A
kW
*/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
External finish
Heat exchanger
Fan Fan(drive) × No.
Fan motor output
Airflow(Low-Medium2-Medium1-High)
External static pressure
Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Field drain pipe O.D.
Dimensions
Weight
W
D
H
INDOOR UNIT
Single phase, 50Hz, 230V
Munsell 6.4Y 8.9/0.4
Plate fin coil
Sirocco fan (direct) x 3
0.095
16-17-18-20(565-600-635-705)
0(direct blow)
Remote controller & built-in
35-37-39-41
26(1)
1,280(50-3/8)
680(26-3/4)
230(9-1/16)
32(71)
4-1. SPECIFICATIONS

8
Single phase, 50Hz, 230V
Munsell 6.4Y 8.9/0.4
Plate fin coil
Sirocco fan (direct) × 4
0.160
22-24-26-28(775-850-920-990)
0(direct blow)
Remote controller & built-in
37-39-41-43
26(1)
1,600(63)
680(26-3/4)
230(9-1/16)
36(79)
Cooling
0.09
0.65
Heating
0.09
0.65
PCA-RP100KAQ
kW
A
kW
*/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
External finish
Heat exchanger
Fan Fan(drive) × No.
Fan motor output
Airflow(Low-Medium2-Medium1-High)
External static pressure
Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Field drain pipe O.D.
Dimensions
Weight
W
D
H
INDOOR UNIT
Single phase, 50Hz, 230V
Munsell 6.4Y 8.9/0.4
Plate fin coil
Sirocco fan (direct) × 4
0.160
23-25-27-29(810-885-955-1025)
0(direct blow)
Remote controller & built-in
39-41-43-45
26(1)
1,600(63)
680(26-3/4)
230(9-1/16)
38(84)
Cooling
0.11
0.76
Heating
0.11
0.76
PCA-RP125KAQ
kW
A
kW
*/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
External finish
Heat exchanger
Fan Fan(drive) × No.
Fan motor output
Airflow(Low-Medium2-Medium1-High)
External static pressure
Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Field drain pipe O.D.
Dimensions
Weight
W
D
H
INDOOR UNIT
Single phase, 50Hz, 230V
Munsell 6.4Y 8.9/0.4
Plate fin coil
Sirocco fan (direct) × 4
0.160
24-26-29-32(850-920-1025-1130)
0(direct blow)
Remote controller & built-in
41-43-45-48
26(1)
1,600(63)
680(26-3/4)
230(9-1/16)
39(86)
Cooling
0.14
0.90
Heating
0.14
0.90
PCA-RP140KAQ
kW
A
kW
*/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
External finish
Heat exchanger
Fan Fan(drive) × No.
Fan motor output
Airflow(Low-Medium2-Medium1-High)
External static pressure
Operation control & Thermostat
Noise level(Low-Medium2-Medium1-High)
Field drain pipe O.D.
Dimensions
Weight
W
D
H
INDOOR UNIT

9
PCA-RP50KAQ PCA-RP60, 71KAQ

50
0
-50
-100
-150
-200
-250
-300
Static pressure[Pa]
Airflow rate[m³/min]
0 1 2 3 4
50
0
-50
-100
-150
-200
-250
-300
Static pressure[Pa]
Airflow rate[m³/min]
0 1 2 3 4
50
0
-50
-100
-150
-200
-250
-300
Static pressure[Pa]
Airflow rate[m³/min]
0 1 2 3 4

PCA-RP100, 125, 140KAQ

4-2. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS
Q
0
BA
C
1Curve in the
graphs
Duct characteristics
at site
Q
A
EC
2
Q
Qa
AD
3
Q…Designed amount of fresh air intake
<m3/min>
A…Static pressure loss of fresh air
intake duct system with airflow
amount Q <Pa>
B…
Forced static pressure at air conditioner
inlet with airflow amount Q
<Pa>
C…Static pressure of booster fan with
airflow amount Q <Pa>
D…Static pressure loss increase amount
of fresh air intake duct system for
airflow amount Q <Pa>
E…Static pressure of indoor unit with
airflow amount Q <Pa>
Qa…Estimated amount of fresh air
intake without D <m3/min>
How to read curves

10
NOISE CRITERION CURVES5
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 bar)
BAND CENTER FREQUENCIES, Hz
PCA-RP50GA
PCA-RP50GA#1
PCH-P50GAH
NOTCH
High
Medium1
Medium2
Low
SPL(dB)
40
37
34
32
LINE NOTCH
High
Medium1
Medium2
Low
SPL(dB)
40
37
35
33
LINE
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 bar)
BAND CENTER FREQUENCIES, Hz
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
BAND CENTER FREQUENCIES, Hz
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 bar)
PCA-RP100GA
PCA-RP100GA#1
PCH-P100GAH
NOTCH
High
Medium1
Medium2
Low
SPL(dB)
41
39
37
35
LINE
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
BAND CENTER FREQUENCIES, Hz
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 bar)
PCA-RP125GA
PCA-RP125GA#1
PCH-P125GAH
NOTCH
High
Medium1
Medium2
Low
SPL(dB)
43
41
39
37
LINE
PCA-RP50KAQ PCA-RP60KAQ
PCA-RP71KAQ PCA-RP100KAQ

1111
1m
1m unit
about 1.4m
MICROPHONE
ceiling
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
BAND CENTER FREQUENCIES, Hz
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 bar)
PCA-RP140GA
PCA-RP140GA#1
PCH-P140GAH
NOTCH
High
Medium1
Medium2
Low
SPL(dB)
45
43
41
39
LINE
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
BAND CENTER FREQUENCIES, Hz
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 bar)
PCA-RP140GA
PCA-RP140GA#1
PCH-P140GAH
NOTCH
High
Medium1
Medium2
Low
SPL(dB)
48
45
43
41
LINE
PCA-RP125KAQ PCA-RP140KAQ

12
PCA-RP50KAQ Unit : mm
OUTLINES AND DIMENSIONS6
(Drainage)
When drain socket is installed
2
246 When drain socket
is installed
233
When electrical box
is pulled down
Electrical box
NOTES. 1.Use M10 or W3/8 screw for anchor bolt. 2.Please be sure when installing the
drain pump (option parts), refrigerant pipe will be only upward.
Electrical box
233
Air outlet
Air intake
9 6 7 8
5 1
2 3 4
Knock out hole for upper drain pipe arrangement Knock out hole for fresh air intake ø100 Knock out hole for wiring arrangement 2-ø22 Knock out hole for wiring arrangement 2-ø26
Drainage pipe connection(26mmI.D.) Drainage pipe connection(for the left arrangement) Knock out hole for left drain-piping arrangement Refrigerant-pipe connection(gas pipe side/flared connection) Refrigerant-pipe connection(liquid pipe side/flared connection)
1
In case of the rear pipe arrangement, make sure to remove the shaded portions from the independent piece. Then put the independent piece back in initial position. (The heat exchanger might be clogged because of dust)
5
10 51
246
(Drainage)
(gas ø12.7) (liquid ø6.35)
150
62140
18
917(Suspension bolt pitch)
320
680 80
84 88
195
230
57
254 476 680
182 85
878
848
260
24
38
85 86 2
126
169
121
190
18
38
120°
960 22 853
124 76
46 190
75
387
461
3
8
Ceiling
514
7
184
203
ø125
6
9
37
138
2
[FRONT VIEW]
Accessory···Drain socket (I.D. 26)
(71)
236

1313
Unit : mm
PCA-RP60, 71KAQ
(Drainage)
When drain socket is installed
2
246
When drain socket is installed
233
Air intake
5 4 1 2 3
6 7
8 9
Knock out hole for upper drain pipe arrangement Knock out hole for fresh air intake ø100 Knock out hole for wiring arrangement 2-ø22 Knock out hole for wiring arrangement 2-ø26
Drainage pipe connection(26mmI.D.) Drainage pipe connection(for the left arrangement) Knock out hole for left drain-piping arrangement Refrigerant-pipe connection(gas pipe side/flared connection) Refrigerant-pipe connection(liquid pipe side/flared connection)
NOTES. 1.Use M10 or W3/8 screw for anchor bolt. 2.Please be sure when installing the
drain pump (option parts), refrigerant pipe will be only upward.
Air outlet
233
Electrical box
When electrical box
is pulled down
Electrical box
97
In case of the rear pipe arrangement, make sure to remove the shaded portions from the independent piece. Then put the independent piece back in initial position. (The heat exchanger might be clogged because of dust)
5
10 51
246
A
B
236
150
62140
18
1237(Suspension bolt pitch)
320
680 80
84 88
195
230
57
254 476 680
182 85
1198
848
260
24
38
85 86 2
126
169
37
121
138
190 1
18
38
120°
1280 22 1173
124 76
46 190
75
387461
238514
ø125
6
8
[FRONT VIEW]
Ceiling
(Drainage)
(gas ø15.88) (liquid )
Accessory···Drain socket (I.D. 26) Flare nut ø6.35 (RP60 only)
A B
60
179 203
71
180 200
5 LIQUID SIDE 4 GAS SIDE
:Initial flare nut size
Use the current nuts meeting the pipe size of the outdoor unit.
Available pipe size
RP60
ø6.35 ø9.52
ø15.88
RP71
ø9.52
ø15.88
(71)

14
Unit : mm
PCA-RP100, 125, 140KAQ
(Drainage)
When drain socket is installed
246
When drain socket is installed
233
Knock out hole for upper drain pipe arrangement Knock out hole for fresh air intake ø100 Knock out hole for wiring arrangement 2-ø22 Knock out hole for wiring arrangement 2-ø26
9 6 7 8
Drainage pipe connection(26mmI.D.) Drainage pipe connection(for the left arrangement) Knock out hole for left drain-piping arrangement Refrigerant-pipe connection(gas pipe side/flared connection) Refrigerant-pipe connection(liquid pipe side/flared connection)
5 1 2 3 4
Ceiling
[FRONT VIEW]
Electrical box
When electrical box is pulled down
2
NOTES. 1.Use M10 or W3/8 screw for anchor bolt. 2.Please be sure when installing the
drain pump (option parts), refrigerant pipe will be only upward.
In case of the rear pipe arrangement, make sure to remove the shaded portions from the independent piece. Then put the independent piece back in initial position. (The heat exchanger might be clogged because of dust)
5
10 51
246
180
200
(Drainage)
(gas ø15.88) (liquid ø9.52)
236
150
62140
18
1557
320
680 80
84 88
195
230
233
57
254 476 680
182 85
1518
848
260
24
38
85 86 2
126
16937
121
138
190 1
18
38
120°
1600 221493
124 76
46
190
75
387
461
71
23
514
7
ø125
6
88
9
Electrical box
Air outlet
Air intake
(Suspension bolt pitch)
Accessory···Drain socket (I.D. 26)

1515
PCA-RP50KAQ PCA-RP60KAQ PCA-RP71KAQ
PCA-RP100KAQ PCA-RP125KAQ PCA-RP140KAQ
WIRING DIAGRAM7
<Table 2>SW2 (CAPACITY CODE)
Service Service MODELS
SW2
PCA-RP100KAQ
MODELS
ON
OFF
12345
PCA-RP50KAQ
ON
OFF
12345
PCA-RP125KAQ
ON
OFF
12345
PCA-RP60KAQ
ON
OFF
12345
PCA-RP140KAQ
ON
OFF
12345
PCA-RP71KAQ
ON
OFF
12345
<Table 1>
SW1 (MODEL SELECTION)
SW1
ON
OFF
12345
Be sure to turn off the source power
and then disconnect fan motor connector.
(Failure to do so will cause trouble in Fan motor)
Service
Notes: 1. SymboIs used in wiring diagram above are, : Connector,
:Terminal (block).
2. Indoor and outdoor connecting wires are made with poIarities,
make wiring matching terminal numbers (S1, S2, S3).
3. Since the outdoor side electric wiring may change, be sure to
check the outdoor unit electric wiring for servicing.
4. This diagram shows the wiring of indoor and outdoor connecting
wires.(specification of 230V), adopting superimposed system
of power and signal.
1: When work to Supply power separately to indoor and
outdoor units was applied, refer to Fig 1.
. 2: For power supply system of this unit, refer to the caution
label located near this diagram.
FLOAT SW
CN4F
(WHT)
When attaching
drain pump
(option parts),
remove the jumper
connector CN4F
and fit the drain
float switch (FS).
When attaching
drain pump
(option parts)
FS
14
INDOOR/OUTDOOR
COMMUNICATION
CN3C
(BLU)
19
1
1
3
4
51
41
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
CN2L
ON OFF
SWE
J42J41
SW2SW1
LED3 LED2 LED1
LED2
LED1
RU
SW2
SW1
CNB
9
5
t˚t˚t˚
TH2 TH5 TH1
MV
BZ
M
W.B
I.B
14
21 21
21
Refer to tables 1 and 2
TB4
YLW
ORN
ORN
BRN
YLW
YLW
ORN
DCL
TO OUTDOOR
UNIT
135
31
M
1~
DP
(OPTION PARTS)
D.U.M
CNP
(BLU)
OUTDOOR
CN01
(BLK)
S1
S2
S3
741
3~
MF
MS
(OPTION PARTS)
13
REMOCON
CN22
(BLU)
WIRELESS
CN90
(WHT)
VANE CNV (WHT)
Pair No.
FAN
CNMF
(WHT)
INTAKE
CN20
(RED)
FLOAT SW
CN4F
(WHT)
LIQUID/PIPE
CN44
(WHT)
CN32
(WHT)
CN51(WHT)
CN41(WHT)
X1
FUSE
+–
2R.B
TB5
TRANSMISSION
WIRES
DC12V
21
TB6
2
1
The black square(  )indicates a switch
position.
SYMBOL SYMBOLNAME NAME
I.B
R.B
INDOOR CONTROLLER BOARD
FUSE (T6.3AL250V)
CONNECTOR (LOSSNAY)
CONNECTOR (REMOTE SWITCH)
CONNECTOR (HA TERMINAL-A)
CONNECTOR (CENTRALLY CONTROL)
POWER SUPPLY (I.B)
POWER SUPPLY (R.B)
TRANSMISSION (INDOOR-OUTDOOR)
RELAY (DRAIN PUMP)
WIRED REMOTE CONTROLLER BOARD
SWITCH (MODEL SELECTION) See table 1
SWITCH (CAPACITY CODE) See table 2
CONNECTOR (EMERGENCY OPERATION)
FAN MOTOR
VANE MOTOR DRAIN PUMP
DRAIN FLOAT SWITCH
TERMINAL BLOCK (Indoor unit Power (option parts))
TERMINAL BLOCK ( INDOOR/OUTDOOR CONNECTING LINE )
TERMINAL BLOCK (REMOTE CONTROLLER
TRANSMISSION LINE)
REACTOR
ROOM TEMP. THERMISTOR
(0ºC / 15k, 25ºC / 5. 4kDETECT)
PIPE TEMP. THERMISTOR/LIQUID
(0ºC / 15k, 25ºC / 5. 4kDETECT)
COND. / EVA. TEMP. THERMISTOR
(0ºC / 15k, 25ºC / 5. 4kDETECT)
MF
FUSE
MV DP
CN2L
FS
CN32
TB2
CN41
CN51
TB4
DCL
LED1
TB5,TB6
LED2
TH1
LED3
X1
TH2
SW1
TH5
SW2
SWE
[LEGEND]
W.B
RU
BZ
LED1
LED2
SW1
SW2
OPTION PARTS
PCB FOR WIRELESS REMOTE CONTROLLER
RECEIVING UNIT
BUZZER
LED (OPERATION INDICATION : GREEN)
LED (PREPARATION FOR HEATING : ORANGE)
EMERGENCY OPERATION (HEAT / DOWN)
EMERGENCY OPERATION (COOL / UP)
DCL
TO OUTDOOR UNIT
INDOOR/OUTDOOR
COMMUNICATION
CN3C
(BLU)
L
N
1
3
5
31
CN01
(BLK)
ORN
YLW YLW BLU RED
GRN/YLW
I.B
1 (Fig. 1)
I.B
TB2
POWER SUPPLY
( 1PHASE)
230V 50Hz
ORN
ORN
YLW
BRN
TB4
S1
S2
S3
(OPTION PARTS)

16
Pipe temperature
thermistor/liquid
(TH2)
Distributor
with strainer 1/2
#50/#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)
REFRIGERANT SYSTEM DIAGRAM8
PCA-RP50KAQ PCA-RP60KAQ PCA-RP71KAQ
PCA-RP100KAQ PCA-RP125KAQ PCA-RP140KAQ

17
<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.
9-1. TROUBLESHOOTING
Unit conditions at service Error code Actions to be taken for service (summary)
The trouble is reoccurring.
Displayed
Not displayed
Judge what is wrong and take a corrective action
according to “9-3. Self-diagnosis action table”.
Conduct troubleshooting and ascertain the cause of the
trouble according to “9-4. Troubleshooting by inferior
phenomena”.
The trouble is not reoccurring.
Logged
Not logged
Consider the temporary defects such as the work of
protection devices in the refrigerant circuit including
compressor, poor connection of wiring, noise 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.
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.
TROUBLESHOOTING9

18
• "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.
[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.
<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.
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
ERROR CODE
ERROR CODE
ERROR CODE
Turn on the power.
Press the [CHECK] button twice.
Set address with [TEMP] button if system control is used.
Press the [ON/OFF] button to stop the self-check.
CHECK button
Address
TEMP. button
IC : Indoor unit
OC: Outdoor unit
Check code
Unit No.
Timer ON/OFF button









<To delete check code>
Display the error code on the self-check result display screen.
The address for self-check will blink when the ON/OFF
button is pressed twice within 3 seconds.
– – – – : No trouble generated in the past.
FFF F : No corresponding unit.
■Wired remote controller(Option)
■Wireless remote controller(Option)

19
[Output pattern A] Errors detected by indoor unit
[Output pattern B]
E9
*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.
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 Check code Symptom Remark
(Number of times)
Wireless remote controller
Wired remote controller
Beeper sounds/OPERATION
INDICATOR lamp flashes Check code
(Number of times)
Wireless remote controller
Wired remote controller
1P1
Intake sensor error
P9 Pipe (TH5) sensor error
2P2 Pipe (TH2) sensor error
3E6,E7
Indoor/outdoor unit communication error
4 P4 Drain sensor error/Float switch connector (CN4F) open
5P5
PA Drain pump error
Forced compressor stop(due to water leakage abnormality)
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 ––
–
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 operated/
insufficient refrigerant
6Abnormal high pressure (63H operated)/Overheating
protection operation
7Abnormal temperature of heat sink
8Outdoor unit fan protection 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
• 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.

20
•If the unit cannot be operated properly after test run, refer to the following table to find the cause.
Symptom Cause
Wired remote controller LED 1, 2 (PCB in outdoor unit)
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.
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 after
power-on
Subsequent to
about 2 minutes
after 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 connected.
•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 microprocessor) 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 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.
lighted. (Correct operation)
• 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.