Mitsubishi Electric PKA-A12GA User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES .....................................2
2. REFERENCE MANUAL ......................................2
3. SAFETY PRECAUTION ......................................3
4. PART NAMES AND FUNCTIONS.......................5
5. SPECIFICATIONS ...............................................9
6. NOISE CRITERION CURVES........................... 11
7. OUTLINES AND DIMENSIONS ........................ 12
8. WIRING DIAGRAM............................................ 15
9. REFRIGERANT SYSTEM DIAGRAM
.................
19
10. TROUBLE SHOOTING......................................20
11. SPECIAL FUNCTION......................................... 35
12. DISASSEMBLY PROCEDURE..........................38
13. RoHS PARTS LIST............................................44
Indoor unit
[Model names]
PKA-A12GA
PKA-A18GA
PKA-A24FA
PKA-A30FA
PKA-A36FA
PKA-A12GAL
PKA-A18GAL
PKA-A24FAL
PKA-A30FAL
PKA-A36FAL
INDOOR UNIT
No.OC369
REVISED EDITION-E
WIRELESS REMOTE
CONTROLLER
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
Model name indication
March 2013
ON/OFF
TEMP.
WIRED REMOTE
CONTROLLER
PKA-A12GA PKA-A18GA
PKA-A12GAL PKA-A18GAL
NOTE:
• This manual describes only
service data of the indoor
units.
• RoHS compliant products
have <G> mark on the spec
name plate.
• For servicing RoHS compli-
ant products, refer to the
RoHS PARTS LIST.
• Please void OC369
REVISED EDTION-D.
[Service Ref.]
PKA-A12GA PKA-A12GA1PKA-A12GA2
PKA-A18GA PKA-A18GA1PKA-A18GA2
PKA-A24FA PKA-A24FA1PKA-A24FA2
PKA-A30FA PKA-A30FA1PKA-A30FA2
PKA-A36FA PKA-A36FA1PKA-A36FA2
PKA-A12GAL PKA-A12GAL1PKA-A12GAL2
PKA-A18GAL PKA-A18GAL1PKA-A18GAL2
PKA-A24FAL PKA-A24FAL1PKA-A24FAL2
PKA-A30FAL PKA-A30FAL1PKA-A30FAL2
PKA-A36FAL PKA-A36FAL1PKA-A36FAL2
Revision:
• The indicated No. of
CORNER COVER (page
50) in the illustration have
been corrected in REVISED
EDITION-E.

2
1 TECHNICAL CHANGES
2REFERENCE MANUAL
Service Ref.
PUZ-A18/24/30/36/42NHA
PUZ-A18/24/30/36/42NHA-BS
PUY-A12/18/24/30/36/42NHA(1)
PUY-A12/18/24/30/36/42NHA(1)-BS
Service Manual No.
OC367
PUZ-HA36NHA OCH426
OCB426
2-1. OUTDOOR UNIT SERVICE MANUAL
Series (Outdoor unit)
PUZ-A·NHA(-BS)
PUY-A·NHA(-BS)
Data Book No.
OCS04
PUZ-HA36NHA OCS12
2-2. TECHNICAL DATA BOOK
PKA-A12GA1PKA-A12GA2
PKA-A18GA1PKA-A18GA2
PKA-A24FA1PKA-A24FA2
PKA-A30FA1PKA-A30FA2
PKA-A36FA1PKA-A36FA2
PKA-A12GAL1PKA-A12GAL2
PKA-A18GAL1PKA-A18GAL2
PKA-A24FAL1PKA-A24FAL2
PKA-A30FAL1PKA-A30FAL2
PKA-A36FAL1PKA-A36FAL2
• Indoor controller board (I.B) has been changed (11. SPECIAL FUNCTION is added).
PKA-A12GA PKA-A12GA1
PKA-A18GA PKA-A18GA1
PKA-A24FA PKA-A24FA1
PKA-A30FA PKA-A30FA1
PKA-A36FA PKA-A36FA1
PKA-A12GAL PKA-A12GAL1
PKA-A18GAL PKA-A18GAL1
PKA-A24FAL PKA-A24FAL1
PKA-A30FAL PKA-A30FAL1
PKA-A36FAL PKA-A36FAL1
• Indoor controller board (I.B) has been changed.
OC369E

3
Cautions for units utilizing refrigerant R410A
3-2. CAUTIONS RELATED TO NEW REFRIGERANT
Use new refrigerant 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
compressor.
If large amount of mineral oil enters, that can cause deterio-
ration of refrigerant oil etc.
Store the piping indoors, and keep both ends of
the piping sealed until just before brazing.
(Leave elbow joints, etc. in their packaging.)
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.
The refrigerant oil applied to flares and flange
connections must be ester oil, ether oil or
alkylbenzene oil in a small amount.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the
unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the
spec labels provided with our products.
We will not be held responsible for mechanical failure,
system malfunction, unit breakdown or accidents caused
by failure to follow the instructions.
Use the specified refrigerant only.
[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.
3SAFETY PRECAUTION
3-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminals, all supply
circuits must be disconnected.
OC369E

4
Gravimeter
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A 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.)
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 —
OC369E

5
4PART NAMES AND FUNCTIONS
Indoor Unit
Air intake Air intake grille
Filter
Air outlet
Guide vane
Auto vane
PKA-A12GA
PKA-A18GA
PKA-A12GAL
PKA-A18GAL
PKA-A12GA1
PKA-A18GA1
PKA-A12GAL1
PKA-A18GAL1
PKA-A12GA2
PKA-A18GA2
PKA-A12GAL2
PKA-A18GAL2
Indoor Unit
PKA-A24FA
PKA-A30FA
PKA-A36FA
PKA-A24FAL
PKA-A30FAL
PKA-A36FAL
PKA-A24FA1
PKA-A30FA1
PKA-A36FA1
PKA-A24FAL1
PKA-A30FAL1
PKA-A36FAL1
PKA-A24FA2
PKA-A30FA2
PKA-A36FA2
PKA-A24FAL2
PKA-A30FAL2
PKA-A36FAL2
Guide vane
Air intake
Filter Air intake grille
Air outlet Air outlet
Auto vane
Room air is suctioned
here.
Removes dust and dirt
from the intake air.
Airflow can be changed
to horizontally by moving
the guide vane to the left
or right.
Disperse airflow up and
down as well as adjusts the
angle of airflow direction.
OC369E

6
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
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
Built-in temperature sensor
Wired remote controller
Once the controllers are set, the same operation mode can be repeated by simply pressing the ON/OFF button.
OC369E

7
Wired remote controller
°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
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
Displayed 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
“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.
Displayed 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.
The indicator shows the direc-
tion of the outcoming airflow.
OC369E

8
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.
MODE SELECT button
Switches the operation mode between
COOLING/DRY/FAN/HEATING and AUTO
mode.
CHECK-TEST RUN buttons
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.
buttons
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
Wireless remote controller
OC369E

9
5SPECIFICATIONS
A
A
kW
F.L.A
*/min(CFM)
Pa(mmAq)
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
Service Ref.
Power supply(phase, cycle, voltage)
Max. Fuse Size
Min. Circuit Ampacity
External finish
Heat exchanger
Fan Fan(drive) %No.
Fan motor output
Fan motor
Airflow (Low-Medium2-Medium1-High)
External static pressure
Operation control & Thermostat
Noise level( Low-Medium2-Medium1-High)
Field drain pipe I.D.
Dimensions
Weight
W
D
H
INDOOR UNIT
Single phase, 60Hz, 208/230V
15
1
Munsell 0.70Y 8.59/0.97
Plate fin coil
Line flow (direct) %1
0.030
0.33
Dry: 9-10-11-12(320-350-390-425)
Wet:8-9-10-11(290-315-350-380)
0(direct blow)
GA: Wired remote controller & built-in GAL: Wireless remote controller & built-in
36-38-41-43
20(13/16)
990(39)
235(9-1/4)
340(13-3/8)
16(35)
PKA-A12GA(1)(2) / PKA-A12GAL(1)(2)
A
A
kW
F.L.A
*/min(CFM)
Pa(mmAq)
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
Service Ref.
Power supply(phase, cycle, voltage)
Max. Fuse Size
Min. Circuit Ampacity
External finish
Heat exchanger
Fan Fan(drive) %No.
Fan motor output
Fan motor
Airflow(
Low-Medium2-Medium1-High
)
External static pressure
Operation control & Thermostat
Noise level(Low-High)
Field drain pipe I.D.
Dimensions
Weight
W
D
H
INDOOR UNIT
Single phase, 60Hz, 208/230V
15
1
Munsell 0.70Y 8.59/0.97
Plate fin coil
Line flow (direct) %1
0.030
0.33
Dry: 9-10-11-12(320-350-390-425)
Wet:8-9-10-11(290-315-350-380)
0(direct blow)
GA: Wired remote controller & built-in GAL:Wireless remote controller & built-in
36-38-41-43
20(13/16)
990(39)
235(9-1/4)
340(13-3/8)
16(35)
PKA-A18GA(1)(2) / PKA-A18GAL(1)(2)
Single phase, 60Hz, 208/230V
15
1
Munsell 3.4Y 7.7/0.8
Plate fin coil
Line flow (direct) %2
0.045
0.43
Dry: 15-20(530-705)
Wet:14-18(480-635)
0(direct blow)
FA:Wired remote controller & built-in FAL: Wireless remote controller & built-in
39-45
20(13/16)
1,400(55-1/8)
235(9-1/4)
340(13-3/8)
24(53)
PKA-A24FA(1)(2) / PKA-A24FAL(1)(2)
A
A
kW
F.L.A
*/min(CFM)
Pa(mmAq)
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
Service Ref.
Power supply (phase, cycle, voltage)
Max. Fuse Size
Min. Circuit Ampacity
External finish
Heat exchanger
Fan Fan (drive) %No.
Fan motor output
Fan motor
Airflow (Low-High)
External static pressure
Operation control & Thermostat
Noise level(Low-High)
Field drain pipe I.D.
Dimensions
Weight
W
D
H
INDOOR UNIT
OC369E

10
Single phase, 60Hz, 208/230V
15
1
Munsell 3.4Y 7.7/0.8
Plate fin coil
Line flow (direct) %2
0.045
0.43
Dry: 15-20(530-705)
Wet: 14-18(480-635)
0(direct blow)
FA: Wired remote controller & built-in FAL: Wireless remote controller & built-in
39-45
20(13/16)
1,400(55-1/8)
235(9-1/4)
340(13-3/8)
24(53)
Service Ref.
Power supply (phase, cycle, voltage)
Max. Fuse Size
Min. Circuit Ampacity
External finish
Heat exchanger
Fan Fan (drive) %No.
Fan motor output
Fan motor
Airflow (Low-High)
External static pressure
Operation control & Thermostat
Noise level (Low-High)
Field drain pipe I.D.
Dimensions
Weight
A
A
kW
F.L.A
*/min(CFM)
Pa(mmAq)
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
PKA-A30FA(1)(2) / PKA-A30FAL(1)(2)
W
D
H
INDOOR UNIT
Single phase, 60Hz, 208/230V
15
1
Munsell 3.4Y 7.7/0.8
Plate fin coil
Line flow (direct) %2
0.070
0.52
Dry: 22-28(780-990)
Wet:20-25(700-890)
0(direct blow)
FA: Wired remote controller & built-in FAL: Wireless remote controller & built-in
46-49
20(13/16)
1,680(66-1/8)
235(9-1/4)
340(13-3/8)
28(62)
Service Ref.
Power supply (phase, cycle, voltage)
Max. Fuse Size
Min. Circuit Ampacity
External finish
Heat exchanger
Fan Fan(drive) %No.
Fan motor output
Fan motor
Airflow (Low-High)
External static pressure
Operation control & Thermostat
Noise level (Low-High)
Field drain pipe I.D.
Dimensions
Weight
PKA-A36FA(1)(2) / PKA-A36FAL(1)(2)
A
A
kW
F.L.A
*/min(CFM)
Pa(mmAq)
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
W
D
H
INDOOR UNIT
OC369E

11
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(0dB=0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
UNIT WALL
3.3ft
3.3ft
MICROPHONE
PKA-A24FA
PKA-A30FA
PKA-A24FAL
PKA-A30FAL
PKA-A24FA1
PKA-A30FA1
PKA-A24FAL1
PKA-A30FAL1
PKA-A24FA2
PKA-A30FA2
PKA-A24FAL2
PKA-A30FAL2
PKA-A12GA
PKA-A12GAL
PKA-A18GA
PKA-A18GAL
PKA-A12GA1
PKA-A12GAL1
PKA-A18GA1
PKA-A18GAL1
PKA-A12GA2
PKA-A12GAL2
PKA-A18GA2
PKA-A18GAL2
High
Low 45
SPL(dB)
39
LINE
NOTCH
High
Low
SPL(dB) LINE
NOTCH
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 (0dB=0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
High
NOTCH
Medium1
Medium2
Low
43
SPL(dB)
41
38
36
LINE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0dB=0.0002
μ
bar)
49
46
PKA-A36FA
PKA-A36FAL
PKA-A36FA1
PKA-A36FAL1
PKA-A36FA2
PKA-A36FAL2
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
6NOISE CRITERION CURVES
OC369E

12
7OUTLINES AND DIMENSIONS
INDOOR UNIT
PKA-A12GA PKA-A18GA PKA-A12GAL PKA-A18GAL Unit :inch(mm)
PKA-A12GA1PKA-A18GA1PKA-A12GAL1PKA-A18GAL1
PKA-A12GA2PKA-A18GA2PKA-A12GAL2PKA-A18GAL2
Wiring entrance holes
Service space required around indoor unit
Front view (the open-topped grille)
Right side
Left side Front view
Gas pipe
Liquid pipe
2
1
MODEL 12/18
1/4 inch
1/2 inch
Drain hose
3/16(5)
1(25)
1-11/32(34)
1-5/16(33)
Air intake
Air intake
Lower side
22-7/8(581)
17-11/16(449)
Knockout hole for right piping
Refrigerant pipe Drain pipe
Wiring hole
Gas pipe
Liquid pipe
(Necessary clearance for unit installation)
Filter grip
13/16(21)
13/16(21)
Knockout hole for under piping
Refrigerant piping Drain pipe
Wiring hole
Service panel
(Power supply access)
Right side
*1 Sleeves are available on the market.
*2 This size shows the lower end of through hole.
ø2-15/16~ø3-5/32
(ø75~ø80)
ø2-15/16(ø75)
Through-holeSleeve *1
(Flexible hose total length 31-1/2(800))
(Right side piping installation)
(Left side piping
installation)
12-Louvers(manual)
Auto vane
Air intake
Knockout hole for left piping
Refrigerant pipe Drain pipe Wiring hole.
1-3/8(35)
Less than 5-1/8(130)
1-31/32(50) or more
5-29/32(150) or more
7-3/32(180) or more
1-13/16(30) or more
27-9/16(700) 6-1/32(153)
3-3/8(86)
2-1/8(54)
1-7/32(31) 11-1/32(280)
3-1/8(80)
2-3/8(60)
2-3/4(70) 9-21/32(245)
1-31/32(50) 15-9/16(395)15-3/4(400) 7-15/32(190)
2-3/8(60)
2-3/4(70) 1-3/8(35)
3-1/8(79)
6-5/16(160) 1-9/16(40)
27-3/4(705) Air outlet 9-1/4(235)
Less than 19/32(15)
7-25/32(198)
2-3/4(70) 9-21/32(245)
2-3/8(60)
9-1/4(235)
2-3/32(53)
13-3/8(340)
28-5/32(715) Air intake 8-27/32(225)
13-3/8(340) 3-5/32(80) 11-1/32(280) 9-3/16(233)
39(990)
Details of installation plate Installation plate
balance point hole
49-:3/16(:5)holes
for tapping screw
Knockout hole for
right-rear piping Right-rear
piping hole
R2-1/16(R52.5)
R2-1/16(R52.5)
R2-1/16(R52.5)
R2-1/16(R52.5)
Unit center
14-:9/16(:14)holes
for bolts
Left-rear
piping hole
Knockout hole for
left-rear piping
16-23/32(425)
16-17/32(420)
6-11/16(170)
7-15/32(190)
8-9/32(210)
9-1/16(230)
0
12-11/16(322)+1
0
1-3/8(35)
2-5/32(55)
3-5/32(80)
5-1/8(130)
7-15/32(190)
9-1/16(230)
10-23/32(272)
12-7/32(310)
0
1-3/8(35) 3-3/4(95) 5-29/32(150)
8-1/16(205) 10-1/4(260)
12-19/32(320) 13-19/32(345)
19-1/2(495) 25/32(20) 2-15/16(75) 5-5/16(135)
7-15/32(190) 9-21/32(245) 11-13/16(300) 14-3/16(360) 15-15/16(405)
19-1/2(495)
1-1/4(32)
0
OC369E

13
INDOOR UNIT
PKA-A24FA PKA-A30FA PKA-A24FAL PKA-A30FAL Unit :inch(mm)
PKA-A24FA1PKA-A30FA1PKA-A24FAL1PKA-A30FAL1
PKA-A24FA2PKA-A30FA2PKA-A24FAL2PKA-A30FAL2
5/8 inch
3/8 inch
24/30MODEL
15/16(24)
1-5/16(34)
1-7/16(36)
1
Wiring entrance holes
Terminal blockTerminal block
Knockout hole
for right piping
1-31/32(50) or more
9-27/32(250) or more
9-27/32(250) or more
1-3/16(30) or more
Less than 9-27/32(250)
3-19/32(91)
8-27/32(225)
7-1/4(184)1-3/16(30)
9-7/16(240) 7-3/32(180) 11-1/32(280) 12-3/8(314)
23/32(18)
23/32(18)
13/32*3-19/32=(35-13/16) (10*91=(910)) 11-7/32(285)
1-3/16(30)1-3/16(30)
3/4(19)
35-7/16(900)
3-17/32(90)
24-1/32(610)
11-1/32(280)2-3/8(60)
9-21/32(245)
17-29/32(455)
1-5/32(29)
13/32(10)
38-31/32(990)
3-1/8(80)
12-ø1/4(ø6) holes
for tapping screws
32-ø15/32(ø12) holes
for bolts
Wall fixture
Rear piping h
o
66-ø1/4(ø6) holes
for tapping screws
Unit center
Bolt
Less than 19/32(15)
Drain hose
4-3/8(111)
Drain hose for
left-hand side piping
4-7/32(107)
7-7/32(183)
2-5/32(55)
4-23/32(120)
1-21/32(42)
2-9/32(58)
Drain hose
1-25/32(45) 1-25/32(45) 1-25/32(45)
AB C
1-3/16(30)
1-3/16(30)
1-17/32(39)
B
A
2-29/32(74)
C
3-27/32(98)
1-15/32(37) 2-29/32(74)
1-15/32(37)
2-9/16(65)
5/32(4)
1-17/32(39)
1-9/16(39)
3-15/16(100)
1-1/4(32)
1-15/32(37)
3-15/16(100)
5/32(4)
21-23/32(552) Air outlet
44-3/32(1120)
13-3/8(340)
7-3/4(197)
1/2(13) 2-15/32(62.5)
9-1/4(235) 9-1/4(235)
55-1/8(1400)
9-7/16(240)
42-29/32(1090) Air intake
9-1/4(235)
21-23/32(552) Air outlet
9-1/4(235)
9-1/4(235)
Sleeve*1
2
31/32(25)
43-11/16(1110) Drain hose
Knockout hole
for left piping
Drainage range on
left hand side
Knockout hole for under-piping
Refrigerant pipe /Drain pipe
Drainage range on
right-hand side
ø3-17/32
(ø90)
*1 Sleeves are available
on the market.
Through hole
Lower side
Louvers(Manual)
Auto vanes
Range for left rear piping hole
Under panel(Removable at
left-hand side piping)
ø3-17/32~ø3-15/16
(ø90~ø100)
Liquid pipe
Gas pipe
Air
outlet
Air
intake
Top side
Left side
Right side
Front view
Service space required around indoor unit
Details of installation plate
Knockout hole for wiring
OC369E

14
15/16(24)
1-5/16(34)
1-7/16(36)
1-31/32(50) or more
9-27/32(250) or more
Less than 5-29/32(150)
9-27/32(250) or more
1-3/16(30) or more
Less than 9/16(15)
11-5/8(295) 8-27/32(225)
1-3/16(30) 7-1/4(184)
9-7/16(240) 7-3/32(180) 11-1/32(280) 12-3/8(314)
23/32(18)
23/32(18)
3-5/32(80)
1/2*3-19/32=(46-9/16) (13*91=(1183))
3-19/32(91)
50(1270)
13/32(10)
1-3/16(30)1-3/16(30)
3/4(19)
35-7/16(900)
23-7/16(595)
29-17/32(750)
2-3/8(60)
9-21/32(245)
11-7/32(285)
3-9/16(90)
1-5/32(29)
11-1/32(280)
3-15/16(100)
5/32(4) 1-17/32(39)
2-29/32(74)
1-15/32(37)
2-9/16(65)
1-15/32(37)
1-17/32(39)
1-1/4(32)3-27/32(98)
5/32(4)
2-29/32(74)
1-15/32(37)
1-17/32(39) 3-15/16(100)
1-3/16(30) 1-3/16(30)
1-21/32(42)
2-9/32(58)
27-5/16(694) Air outlet
9-7/16(240)
1-25/32(45)
13-3/8(340)
1/2(13)
1-25/32(45)
2-15/32(62.5)
9-1/4(235)
1-25/32(45)
9-1/4(235)
55-1/8(1400)
9-1/4(235)
53-15/16(1370) Air intake
9-1/4(235)
7-7/32(183)
2-5/32(55)
4-23/32(120)
27-5/16(694) Air outlet
9-1/4(235)
66-1/8(1680)
4-3/8(111)
4-1/32(102)
43-11/16(1110) Drain hose
31/32(25)
7-3/4(197)
9-1/4(235)
1-25/32(45)
Gas pipe
Liquid pipe
MODEL 36
3/8 inch
5/8 inch
Sleeve*1
ø3-17/32~ø3-15/16
(ø90~ø100)
Through hole
ø3-17/32
(ø90)
*1 Sleeves are available
on the market.
Front view
Knockout hole
for left piping
Left side
Top side
Terminal block
Bolt
Right side
Knockout hole
for right piping
Wiring entrance holes
Unit outline
Wall fixture
Rear piping hole
84-ø1/4(ø6) holes
for tapping screws
41-ø15/32(ø12) holes
for bolts 12-ø1/4(ø6) holes
for tapping screws
Unit center
Range for left rear piping hole
Drainage range on
left hand side Drainage range on
right-hand side
1
2
A
ACB
Drain hose for
left-hand side piping
Service space required around indoor unit
Under panel(Removable at
left-hand side piping)
C
Drain hose
Knockout hole for under-piping
Refrigerant pipe /Drain pipe
Lower side
Louvers(Manual)
B
Knockout hole for wiring
Auto vanes
Air
outlet
Air
intake
INDOOR UNIT
PKA-A36FA PKA-A36FAL PKA-A36FA1PKA-A36FAL1 Unit :inch(mm)
PKA-A36FA2PKA-A36FAL2
OC369E

15
Please set the voltage
using the remote controller.
For the setting method,
please refer to the indoor
unit Installation Manual.
INTAKE
CN20
(
RED
)
LIQUID
CN21
(
WHT
)
PIPE
CN29
(
BLK
)
1 2 1 2 1 2
1 31 31 3 1 2
TH5TH1 TH2
REMOCON
CN22
(
BLU
)
1 2
2
1
TB5
R.B
TB6
2
1
TRANSMISSION WIRES DC12V
For A12/18GAL
For A12/18GA
SWE
ON
OFF
SW2 SW1
LED3 LED2 LED1
ZNR
FUSE
X4
CN41 CN2L
CN51 CN32
WIRELESS
CN90
(
WHT
)
VANE
CN6V
(
GRN
)
MV
6
W.B
BZ CNB
RECEIVER
RU LED1 LED2 SW2SW1
9
FAN
(
WHT
)1 3 5
1
1
21 2
3
2 3
BLK WHT WHT RED RED
C
MF
X4
BCR
TO
OUTDOOR
UNIT
TB4
S1
S2
S3
YLW
ORN
YLW
ORN
BRN
YLW ORN BLK WHT BRN ORN
P.B
I.B
POWER
CNDK
(RED)
CNDK
(RED)
DC13.1V
CN2S
(WHT)
POWER
CND
(ORN)
POWER
CN2D(WHT)
A-CONTROL
CN3C(BLU)
Refer to tables 1 and 2
for service PCB.
SW1
Table 1
Service board SW2
Table 2
Service board Service board
1 2 3 4 5
ON
OFF
1 2 3 4 5
ON
OFF
MODELS
PKA-
A12GA(L)
MODELS
PKA-
A18GA(L)
1 2 3 4 5
ON
OFF
+1
P.B INDOOR POWER BOARD
SYMBOL NAME
[LEGEND]
I.B INDOOR CONTROLLER BOARD
FUSE FUSE (6.3A/250V)
ZNR VARISTOR
CN2L CONNECTOR<LOSSNAY>
CN32 CONNECTOR<REMOTE SWITCH>
CN41 CONNECTOR<HATERMINAL-A>
CN51 CONNECTOR<CENTRALLY CONTROL>
SW1 SWITCH <MODEL SELECTION>+See Table 1.
SW2 SWITCH <CAPACITY CODE>+See Table 2.
SWE SWITCH<EMERGENCY OPERATION>
X4 RELAY<FAN MOTOR>
BCR
POWER SUPPLY<R.B>
LED1 POWER SUPPLY<I.B>
LED2 TRANSMISSION<INDOOR-OUTDOOR>LED3
FAN CONTROL ELEMENT
C CAPACITOR<FAN MOTOR>
FAN MOTOR
VANE MOTOR
MF
MV
SYMBOL NAME
TB4 TERMINAL BLOCK<INDOOR/OUTDOOR
CONNECTING LINE>
TERMINAL BLOCK<REMOTE CONTROLLER
TRANSMISSION LINE >
ROOM TEMP.THERMISTOR
<32°F/15kΩ, 77°F/5.2kΩDETECT>
PIPE TEMP.THERMISTOR/LIQUID
<32°F/15kΩ, 77°F/5.2kΩDETECT>
COND./EVA.TEMP.THERMISTOR
<32°F/15kΩ, 77°F/5.2kΩDETECT>
TB5,TB6
TH5
TH1
TH2
W.B WIRELESS REMOTE CONTROLLER BOARD
RECEIVING UNIT
BUZZER
LED<RUN INDICATOR >
LED<HOT ADJUST>
SWITCH<HEATING ON/OFF>
SWITCH<COOLING ON/OFF>
WIRED REMOTE CONTROLLER BOARD
R.B
RU
BZ
LED1
LED2
SW1
SW2
NAMESYMBOL
NOTES:
1. Since the outdoor side electric wiring may change, be sure to check the outdoor unit electric wiring for servicing.
2. Indoor and outdoor connecting wires have polarities, make sure to match terminal numbers (S1, S2, S3) for correct wiring.
3. Symbols used in wiring diagram above are, : Connector, : Terminal (block).
4. This diagram shows the wiring of Indoor and Outdoor connecting wires (specification of 230V), adopting superimposed system of
power and signal.
+1. Use copper supply wires.
The black square ( ) indicates a switch position.
8WIRING DIAGRAM
PKA-A12GA PKA-A18GA PKA-A12GAL PKA-A18GAL
PKA-A12GA1PKA-A18GA1PKA-A12GAL1PKA-A18GAL1
OC369E

16
PKA-A12GA2PKA-A18GA2PKA-A12GAL2PKA-A18GAL2
Please set the voltage
using the remote controller.
For the setting method,
please refer to the indoor
unit Installation Manual.
INTAKE
CN20
(
RED
)
LIQUID
CN21
(
WHT
)
PIPE
CN29
(
BLK
)
TH5TH1 TH2
REMOCON
CN22
(
BLU
)
TB5
R.B
TRANSMISSION WIRES DC12V
For A12/18GAL
For A12/18GA
SWE
ON
OFF
SW2 SW1
LED3 LED2 LED1
ZNR
FUSE
CN24
(
YLW
)
MV
6
W.B
BZ CNB
RECEIVER
RU LED1 LED2 SW2SW1
99
FAN
(
WHT
)
1
1
11
11
1
1
1
2
3
2121212
3
32
332
35
BLK WHT WHT RED RED
C
X4
BCR
TO
OUTDOOR
UNIT
TB4
YLW
ORN
YLW
ORN
BRN
YLW ORN BLK WHT BRN ORN
P.B
I.B
POWER
CNDK
(RED)
CNSK
(RED)
DC13.1V
CN2S
(WHT)
POWER
CND
(ORN)
POWER
CN2D
(WHT)
A-CONTROL
CN3C
(BLU)
Refer to tables 1 and 2
for service PCB.
SW1
Table 1
Service board
SW2
Table 2
The black square ( ) indicates a switch position.
Service board Service board
1 2 3 4 5
ON
OFF
1 2 3 4 5
ON
OFF
MODEL
PKA-
A12GA(L)
MODEL
PKA-
A18GA(L)
1 2 3 4 5
ON
OFF
+1
12
12
CN30
(
BLK
)13
MF
M
1~
M
U
ttt 2
1
TB6
2
1
S2
S3
S1
CN32
(
WHT
)
CN2L
(
RED
)
13
14
CN51
(
WHT
)
CN41
(
WHT
)
51
9
1
6
1
VANE
CN6V
(GRN)
WIRELESS
CN90
(WHT)
P.B INDOOR POWER BOARD
SYMBOL
[LEGEND] NAME
I.B INDOOR CONTROLLER BOARD
FUSE FUSE (6.3A/250V)
ZNR VARISTOR
CN2L CONNECTOR<LOSSNAY>
CN32 CONNECTOR<REMOTE SWITCH>
CN41 CONNECTOR<HA TERMINAL-A>
CN24 CONNECTOR<BACK-UP HEATING>
CN30 CONNECTOR<LLC>
CN51 CONNECTOR<CENTRALLY CONTROL>
SW1 SWITCH <MODEL SELECTION>+See Table 1.
SW2 SWITCH <CAPACITY CODE>+See Table 2.
SWE SWITCH<EMERGENCY OPERATION>
X4 RELAY<FAN MOTOR>
BCR
POWER SUPPLY<R.B>
LED1 POWER SUPPLY<I.B>
LED2 TRANSMISSION<INDOOR-OUTDOOR>LED3
FAN CONTROL ELEMENT
CCAPACITOR<FAN MOTOR>
FAN MOTOR
VANE MOTOR
MF
MV
SYMBOL NAME
TB4 TERMINAL BLOCK<INDOOR/OUTDOOR
CONNECTING LINE>
TERMINAL BLOCK<REMOTE CONTROLLER
TRANSMISSION LINE >
ROOM TEMP.THERMISTOR
<32°F/15kΩ, 77°F/5.2kΩDETECT>
PIPE TEMP.THERMISTOR/LIQUID
<32°F/15kΩ, 77°F/5.2kΩDETECT>
COND./EVA.TEMP.THERMISTOR
<32°F/15kΩ, 77°F/5.2kΩDETECT>
TB5,TB6
TH5
TH1
TH2
W.B WIRELESS REMOTE CONTROLLER BOARD
RECEIVING UNIT
BUZZER
LED<RUN INDICATOR >
LED<HOT ADJUST>
SWITCH<HEATING ON/OFF>
SWITCH<COOLING ON/OFF>
WIRED REMOTE CONTROLLER BOARD
R.B
RU
BZ
LED1
LED2
SW1
SW2
NAME
SYMBOL
NOTES:
1. Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing.
2. Indoor and outdoor connecting wires are made with polarities, make wiring matching terminal numbers (S1, S2, S3).
3. Symbols used in wiring diagram above are, : Connector, : Terminal (block).
4. This diagram shows the wiring of Indoor and Outdoor connecting wires (specification of 230V), adopting superimposed system of
power and signal.
+1. Use copper supply wires.
[Self-diagnosis]
Please refer to technical manuals etc.
OC369E

17
Please set the voltage
using the remote controller.
For the setting method,
please refer to the indoor
unit Installation Manual.
INTAKE
CN20
(
RED
)
LIQUID
CN21
(
WHT
)
PIPE
CN29
(
BLK
)
1 2 1 2 1 2
1 31 31 3 1 2
TH5TH1 TH2
REMOCON
CN22
(
BLU
)
1 2
2
1
TB5
R.B
TB6
2
1
TRANSMISSION WIRES DC12V
For A24/30/36FAL
For A24/30/36FA
SWE
ON
OFF
SW2 SW1
LED3 LED2 LED1
ZNR
FUSE
X4
CN41 CN2L
CN51 CN32
WIRELESS
CN90
(
WHT
)
VANE
CN6V
(
GRN
)
MV
6
W.B
BZ CNB
RECEIVER
RU LED1 LED2 SW2SW1
9
FAN
(
WHT
)1 3 5
1
1
21 2
3
2 3
BLK WHT WHT RED RED
C
MF
X4
BCR
TO
OUTDOOR
UNIT
TB4
S1
S2
S3
YLW
ORN
YLW
ORN
BRN
YLW ORN BLK WHT BRN ORN
P.B
I.B
POWER
CNDK
(RED)
CNDK
(RED)
DC13.1V
CN2S
(WHT)
POWER
CND
(ORN)
POWER
CN2D(WHT)
A-CONTROL
CN3C(BLU)
Refer to tables 1 and 2
for service PCB.
SW1
Table 1
Service board SW2
Table 2
Service board Service board Service board
1 2 3 4 5
ON
OFF
1 2 3 4 5
ON
OFF
MODEL
PKA-
A24FA(L)
MODEL
PKA-
A30FA(L)
MODEL
PKA-
A36FA(L)
1 2 3 4 5
ON
OFF
1 2 3 4 5
ON
OFF
+ 1
P.B INDOOR POWER BOARD
SYMBOL
[LEGEND] NAME
I.B INDOOR CONTROLLER BOARD
FUSE FUSE (6.3A/250V)
ZNR VARISTOR
CN2L CONNECTOR<LOSSNAY>
CN32 CONNECTOR<REMOTE SWITCH>
CN41 CONNECTOR<HA TERMINAL-A>
CN51 CONNECTOR<CENTRALLY CONTROL>
SW1 SWITCH <MODEL SELECTION>+See Table 1.
SW2 SWITCH <CAPACITY CODE>+See Table 2.
SWE SWITCH<EMERGENCY OPERATION>
X4 RELAY<FAN MOTOR>
BCR
POWER SUPPLY<R.B>
LED1 POWER SUPPLY<I.B>
LED2 TRANSMISSION<INDOOR-OUTDOOR>LED3
FAN CONTROL ELEMENT
C CAPACITOR<FAN MOTOR>
FAN MOTOR
VANE MOTOR
MF
MV
SYMBOL NAME
TB4 TERMINAL BLOCK<INDOOR/OUTDOOR
CONNECTING LINE>
TERMINAL BLOCK<REMOTE CONTROLLER
TRANSMISSION LINE>
ROOM TEMP.THERMISTOR
<32°F/15kΩ, 77°F/5.2kΩDETECT>
PIPE TEMP.THERMISTOR/LIQUID
<32°F/15kΩ, 77°F/5.2kΩDETECT>
COND./EVA.TEMP.THERMISTOR
<32°F/15kΩ, 77°F/5.2kΩDETECT>
TB5,TB6
TH5
TH1
TH2
W.B WIRELESS REMOTE CONTROLLER BOARD
RECEIVING UNIT
BUZZER
LED<RUN INDICATOR>
LED<HOT ADJUST>
SWITCH<HEATING ON/OFF>
SWITCH<COOLING ON/OFF>
WIRED REMOTE CONTROLLER BOARD
R.B
RU
BZ
LED1
LED2
SW1
SW2
NAMESYMBOL
NOTES:
1. Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing.
2. Indoor and outdoor connecting wires have polarities, make sure to match terminal numbers (S1, S2, S3) for correct wiring.
3. Symbols used in wiring diagram above are, : Connector, : Terminal (block).
4. This diagram shows the wiring of Indoor and Outdoor connecting wires (specification of 230V), adopting superimposed system of
power and signal.
+1. Use copper supply wires.
The black square ( ) indicates a switch position.
PKA-A24FA PKA-A30FA PKA-A36FA PKA-A24FAL PKA-A30FAL PKA-A36FAL
PKA-A24FA1PKA-A30FA1PKA-A36FA1 PKA-A24FAL1PKA-A30FAL1 PKA-A36FAL1
OC369E

18
SW1
Table 1
Service board
SW2
Table 2
Service board
Service board
Service board
1 2 3 4 5
ON
OFF
1 2 3 4 5
ON
OFF
MODEL
PKA-
A24FA(L)
MODEL
PKA-
A30FA(L)
MODEL
PKA-
A36FA(L)
1 2 3 4 5
ON
OFF
1 2 3 4 5
ON
OFF
Please set the voltage
using the remote controller.
For the setting method,
please refer to the indoor
unit Installation Manual.
For A24/30/36FAL
For A24/30/36FA
INTAKE
CN20
(
RED
)
LIQUID
CN21
(
WHT
)
PIPE
CN29
(
BLK
)
TH5TH1 TH2
REMOCON
CN22
(
BLU
)
TB5
R.B
TRANSMISSION WIRES DC12V
SWE
ON
OFF
SW2 SW1
LED3 LED2 LED1
ZNR
FUSE
CN24
(
YLW
)
MV
6
W.B
BZ CNB
RECEIVER
RU LED1 LED2 SW2SW1
99
FAN
(
WHT
)
1
1
11
11
1
1
1
2
3
2121212
3
32
332
35
BLK WHT WHT RED RED
C
X4
BCR
TO
OUTDOOR
UNIT
TB4
YLW
ORN
YLW
ORN
BRN
YLW ORN BLK WHT BRN ORN
P.B
I.B
POWER
CNDK
(RED)
CNSK
(RED)
DC13.1V
CN2S
(WHT)
POWER
CND
(ORN)
POWER
CN2D
(WHT)
A-CONTROL
CN3C
(BLU)
Refer to tables 1 and 2
for service PCB.
+1
12
12
CN30
(
BLK
)13
MF
M
1~
M
U
ttt 2
1
TB6
2
1
S2
S3
S1
CN32
(
WHT
)
CN2L
(
RED
)
13
14
CN51
(
WHT
)
CN41
(
WHT
)
51
9
1
6
1
VANE
CN6V
(GRN)
WIRELESS
CN90
(WHT)
The black square ( ) indicates a switch position.
NOTES:
1. Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing.
2. Indoor and outdoor connecting wires are made with polarities, make wiring matching terminal numbers (S1, S2, S3).
3. Symbols used in wiring diagram above are, : Connector, : Terminal (block).
4. This diagram shows the wiring of Indoor and Outdoor connecting wires (specification of 230V), adopting superimposed system of
power and signal.
+1. Use copper supply wires.
[Self-diagnosis]
Please refer to technical manuals etc.
P.B INDOOR POWER BOARD
SYMBOL
[LEGEND] NAME
I.B INDOOR CONTROLLER BOARD
FUSE FUSE (6.3A/250V)
ZNR VARISTOR
CN2L CONNECTOR<LOSSNAY>
CN32 CONNECTOR<REMOTE SWITCH>
CN41 CONNECTOR<HA TERMINAL-A>
CN24 CONNECTOR<BACK-UP HEATING>
CN30 CONNECTOR<LLC>
CN51 CONNECTOR<CENTRALLY CONTROL>
SW1 SWITCH <MODEL SELECTION>+See Table 1.
SW2 SWITCH <CAPACITY CODE>+See Table 2.
SWE SWITCH<EMERGENCY OPERATION>
X4 RELAY<FAN MOTOR>
BCR
POWER SUPPLY<R.B>
LED1 POWER SUPPLY<I.B>
LED2 TRANSMISSION<INDOOR-OUTDOOR>LED3
FAN CONTROL ELEMENT
CCAPACITOR<FAN MOTOR>
FAN MOTOR
VANE MOTOR
MF
MV
SYMBOL NAME
TB4 TERMINAL BLOCK<INDOOR/OUTDOOR
CONNECTING LINE>
TERMINAL BLOCK<REMOTE CONTROLLER
TRANSMISSION LINE >
ROOM TEMP.THERMISTOR
<32°F/15kΩ, 77°F/5.2kΩDETECT>
PIPE TEMP.THERMISTOR/LIQUID
<32°F/15kΩ, 77°F/5.2kΩDETECT>
COND./EVA.TEMP.THERMISTOR
<32°F/15kΩ, 77°F/5.2kΩDETECT>
TB5,TB6
TH5
TH1
TH2
W.B WIRELESS REMOTE CONTROLLER BOARD
RECEIVING UNIT
BUZZER
LED<RUN INDICATOR >
LED<HOT ADJUST>
SWITCH<HEATING ON/OFF>
SWITCH<COOLING ON/OFF>
WIRED REMOTE CONTROLLER BOARD
R.B
RU
BZ
LED1
LED2
SW1
SW2
NAME
SYMBOL
PKA-A24FA2PKA-A30FA2PKA-A36FA2 PKA-A24FAL2PKA-A30FAL2 PKA-A36FAL2
OC369E

19
9REFRIGERANT SYSTEM DIAGRAM
PKA-A12GA PKA-A18GA PKA-A24FA PKA-A30FA PKA-A36FA
PKA-A12GAL PKA-A18GAL PKA-A24FAL PKA-A30FAL PKA-A36FAL
PKA-A12GA1PKA-A18GA1PKA-A24FA1PKA-A30FA1PKA-A36FA1
PKA-A12GAL1PKA-A18GAL1PKA-A24FAL1PKA-A30FAL1PKA-A36FAL1
PKA-A12GA2PKA-A18GA2PKA-A24FA2PKA-A30FA2PKA-A36FA2
PKA-A12GAL2PKA-A18GAL2PKA-A24FAL2PKA-A30FAL2PKA-A36FAL2
Pipe temperature
thermistor/liquid
(TH2)
Distributor
with strainer
#50
Condenser/evaporator
temperature thermistor
(TH5)
Room temperature
thermistor (TH1)
Refrigerant flow in cooling
Refrigerant flow in heating
Strainer
#50
Strainer
#50
Heat exchanger Refrigerant GAS pipe connection
(Flare)
Refrigerant LIQUID pipe connection
(Flare)
OC369E

20
10 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.
10-1. 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 “SELF-DIAGNOSIS ACTION TABLE” (10-3).
Identify the cause of the trouble and take a corrective
action according to “TROUBLESHOOTING
OF PROBLEMS” (10-4).
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, and wiring related.
Reset error code logs and restart the unit after finishing
service.
There is no abnormality in electrical components,
controller boards, and remote controller.
Recheck the abnormal symptom.
Identify the cause of the trouble and take a corrective
action according to “TROUBLESHOOTING
OF PROBLEMS” (10-4).
Continue to operate unit for the time being if the cause
is not ascertained.
There is no abnormality in electrical components,
controller boards, remote controller etc.
OC369E