Mitsubishi OC384 Service Manual

SPLIT-TYPE, AIR CONDITIONERS

ON/OFF

TEMP.

ON/OFF TEMP

TECHNICAL & SERVICE MANUAL

April 2006

No. OC384

Series PL

Indoor unit
[Model names]

PL-1.6KAK

PL-2KAK PL-2KAK
PL-2.5KAK PL-2.5KAK
PL-1.6KAKL PL-1.6KAKL
PL-2KAKL PL-2KAKL
PL-2.5KAKL PL-2.5KAKL

INDOOR UNIT

Ceiling Cassettes

[Service Ref.]

PL-1.6KAK

This manual does not cover the
following outdoor units. When
serving them, please refer to the
service manual No.OC152 or
OC127 and this manual in a set.
<Service Ref.>
PU-1.6VLJA1.TH
PU-2VJA1.TH
PU-2NJA.TH
PU-2.5VJA1.TH
PU-2.5NJA.TH

CONTENTS

1. PART NAMES AND FUNCTIONS········2

2. SPECIFICATIONS·································5

3. DATA·····················································8

4. OUTLINES AND DIMENSIONS··········11

5. WIRING DIAGRAM ·····························14

6.

REFRIGERANT SYSTEM DIAGRAM

7. TROUBLESHOOTING························16

8. FUNCTION SETTING ·························31

9. 4-WAY AIR FLOW SYSTEM···············38

10. SYSTEM CONTROL···························39

11. DISASSEMBLY PROCEDURE···········53

12. PARTS LIST········································56

13. OPTIONAL PARTS·····························60

······15

WIRELESS

REMOTE CONTROLLER

PL-1.6/2/2.5KAKL

REMOTE CONTROLLER

WIRED

PL-1.6/2/2.5KAK

1

Disperses airflow up and
down and adjusts the angle
of airflow direction.

Grille

Filters
Removes dust and pollutants
from intake air

Sets airflow to horizontal automatically
during cooling or dehumidifying.

Air Intake
Intakes air from room.

Horizontal Air Outlet

Auto Air Swing Vane

PAR-21MAA

ON/OFF

FILTER

CHECK

OPERATION

CLEAR

TEST

TEMP.

MENU

BACK DAY

MONITOR/SET

CLOCK

ON/OFF

Set Temperature 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
door.

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 preceding operation
number.

Ventilation button
(

Operation button)

To next operation number.

PART NAMES AND FUNCTIONS

● Indoor Unit

PL-1.6KAK PL-1.6KAKL
PL-2KAK PL-2KAKL
PL-2.5KAK PL-2.5KAKL

● Wired remote controller

On the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button.

● Operation buttons

2

● Display

For purposes of this explanation,
all parts of the display are shown
as lit. During actual operation, only
the relevant items will be lit.

˚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

Identifies the current operation

Shows the operating mode, etc.
* Multilanguage display is sup-

ported.

“Centrally Controlled” indicator

Indicates that operation of the re­mote controller has been prohib­ited 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, shows the time
remaining.

“Sensor” indication

Displayed when the remote controller
sensor is used.

“Locked” indicator

Indicates that remote controller but­tons have been locked.

“Clean The Filter” indicator

Comes on when it is time to clean the
filter.

Timer indicators

The indicator comes on if the corre­sponding timer is set.

Up/Down Air Direction indica­tor

The indicator shows the direc­tion of the outcoming airflow.

“One Hour Only” indicator

Displayed if the airflow is set to
weak and downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off after one
hour, at which time the airflow di­rection also changes.

Room Temperature display

Shows the room temperature.

Louver display

Indicates the action of the swing
louver. Does not appear if the
louver is stationary.

(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.

Caution

● Only the Power on indicator lights when the unit is stopped and power supplied to the unit.

● If you press a button for a feature that is not installed at the indoor unit, the remote controller will display the “Not Available”

message.
If you are using the remote controller to drive multiple indoor units, this message will appear only if he feature is not
present at the parent unit.

● When power is turned ON for the first time, it is normal that “PLEASE WAIT” is displayed on the room temperature indica­tion (For max. 2minutes). Please wait until this “PLEASE WAIT” indication disappear then start the operation.

3

ON/OFF TEMP

FAN

VANE

TEST RUN

AUTO STOP

AUTO START

h

min

LOUVER

MODE

CHECK

RESETSET CLOCK

MODEL SELECT

NOT AVAILABLE

CHECK

TEST RUN

˚C

AMPM

AMPM

VANE CONTROL button

Used to change the air flow direction.

CLOCK button

RESET button

SET button

ON/OFF button

The unit is turned ON and OFF alternately
each time the button is pressed.

LOUVER button

This switch the horizontal fan motion ON
and OFF.

(Not available for this model.)

MODE SELECT button

Used to switch the operation mode between
cooling, drying, blowing, heating and auto
mode.

CHECK-TEST RUN button

Only press this button to perform an inspec­tion check or test operation.
Do not use it for normal operation.

FAN SPEED SELECT button

Used to change the fan speed.

TIMER display

Displays when in timer operation or when
setting timer.

button

SET TEMPERATURE button sets any desired
room temperature.

CLOCK display

Displays the current time.

“ ” “ ” display

Displays the order of timer operation.

“ ” “ ” display

Displays whether timer is on or off.

w In case the outdoor unit is cool only type,

the heating mode is not available.

Buttons used to set the “hour and minute” of
the current time and timer settings.

h and min buttons

display

SET TEMP. display indicates desired temper­ature set.

display

FAN SPEED display indicates which fan
speed has been selected.

display

The vertical direction of air flow is indicated.

display

Blinks when model is selected.

display

Lights up while transmission to the indoor
unit is mode using switches.

display

CHECK&TEST RUN display indicates that
the unit is being checked or test-run.

display

OPERATION MODE display
Operation mode display indicates which 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

4

2

SPECIFICATIONS

2-1. STANDARD SPECIFICATIONS

Service Ref.

Item

50Hz

Cooling capacity w1

60Hz

Cooling capacity w2
Total input (50Hz) w3

Service Ref.

External finish
Fan motor output

Airflow Lo-Hi

External static pressure
Operation control & Thermostat

Indoor unitIndoor grillOutdoor unit

Noise level Low-High
Cond. drain connection OD

Dimensions

Weight
External finish

Dimensions

Weight

Service Ref.

External finish
Refrigerant (R-22) control
Crankcase Heater w4
Compressor output
Protection devices
Fan motor output

Airflow
Noise level

Dimensions

Weight

Notes :
w1 Rating conditions (JIS B8616) w2 Rating conditions (SSA 385, 386)

Indoor :D.B. 27°C (80°F), W.B. 19°C (66°F) Indoor : D.B. 29°C (84°F), W.B. 19°C (66°F)
Outdoor : D.B. 35°C (95°F), W.B. 24°C (75°F) Outdoor : D.B. 46°C (115°F), W.B. 24°C (75°F)
Refrigerant piping length (one way) : 5m (16ft) Refrigerant piping length (one way) : 5m (16ft)

w3 Total input based on indicated voltage w4 Capacity of crankcase heater (W) based on 220 volts.

Service Ref.

50Hz 1ph 220V/1ph 220V

Rating conditions (JIS B 8616)

PL-1.6KAK / PL-2KAK / PL-2.5KAK

60Hz

50Hz

60Hz

50Hz
60Hz

W

D
H

W

D
H

50/60Hz

50Hz
60Hz

50/60Hz

W

D
H

(Indoor / Outdoor)

W

Btu/h

W

Btu/h

W

Btu/h

kW

kW

CMM

CFM

CMM

CFM

mmAq,Pa

dB

dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs.)

mm(in.)
mm(in.)
mm(in.)
kg(lbs.)

W

kW

kW
CMM(CFM)
CMM(CFM)

dB
mm(in.)
mm(in.)
mm(in.)
kg(lbs.)

PL-1.6KAK PL-2KAK PL-2.5KAK

3,800

13,000

–
–
–
–

1.54

PL-1.6KAK

0.03

13-15

460-530

–
–

31-35

–

32 (1-1/4)

660 (26)
660 (26)
253 (10)

19 (42)

760 (30)
760 (30)

30 (1-1/8)

3.7 (8)

PU-1.6VLJA

–

1.2/-

0.065

45(1588)

–

49/–

870(34-1/4)

650(25-5/8)

45(99)

Galvanized sheets with gray heat insulation

Remote control & Built-in

Munsell 0.70Y 8.59/0.97

1.TH

Inner thermostat, HP switch, LP switch

5,600

19,100

–
–
–
–

2.57

PL-2KAK

0.03

13-16

460-565

–
–

0 (Direct blow)

32-37

–

32 (1-1/4)

660 (26)
660 (26)
253 (10)

19 (42)

760 (30)
760 (30)

30 (1-1/8)

3.7 (8)

PU-2VJA

Munsell 3.0Y 7.8/1.1

Capillary tube

870(34-1/4)

295+24(11-5/8+1)

650(25-5/8)

1.TH

32/–

2.0/-

0.065

45(1588)

–
–

60(132)

PU-2.5VJA

6,500

22,200

–
–
–
–

2.59

PL-2.5KAK

0.03

14-17

495-600

–
–

35-39.5

–

32 (1-1/4)

660 (26)
660 (26)
253 (10)

20 (44)

760 (30)
760 (30)

30 (1-1/8)

3.7 (8)

1.TH

32/–

2.0/-

0.085

50(1765)

–
–

870(34-1/4)

850(33-7/16)

71(157)

5

Service Ref.

Item

50Hz

Cooling capacity w1

60Hz

Cooling capacity w2
Total input (50/60Hz) w3

Service Ref.

External finish
Fan motor output

Airflow Lo-Hi

External static pressure
Operation control & Thermostat

Indoor unitIndoor grillOutdoor unit

Noise level Low-High
Cond. drain connection OD

Dimensions

Weight
External finish

Dimensions

Weight

Service Ref.

External finish
Refrigerant (R-22) control
Crankcase Heater w4
Compressor output
Protection devices
Fan motor output

Airflow
Noise level

Dimensions

Weight

Notes :
w1 Rating conditions (JIS B8616) w2 Rating conditions (SSA 385, 386)

Indoor :D.B. 27°C (80°F), W.B. 19°C (66°F) Indoor : D.B. 29°C (84°F), W.B. 19°C (66°F)
Outdoor : D.B. 35°C (95°F), W.B. 24°C (75°F) Outdoor : D.B. 46°C (115°F), W.B. 24°C (75°F)
Refrigerant piping length (one way) : 5m (16ft) Refrigerant piping length (one way) : 5m (16ft)

w3 Total input based on indicated voltage w4 Capacity of crankcase heater (W) based on 220 volts.

Service Ref.

50Hz 1ph 220V/1ph 220V
60Hz 1ph 220V/1ph 220V

Rating conditions (JIS B 8616)

PL-1.6KAKL / PL-2KAKL / PL-2.5KAKL

60Hz

50Hz

60Hz

50Hz
60Hz

W

D
H

W

D
H

50/60Hz

50Hz
60Hz

50/60Hz

W

D
H

(Indoor / Outdoor)

W

Btu/h

W

Btu/h

W

Btu/h

kW

kW

CMM

CFM

CMM

CFM

mmAq,Pa

dB

dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)

kg(lbs.)

mm(in.)
mm(in.)
mm(in.)

kg(lbs.)

W

kW

kW
CMM(CFM)
CMM(CFM)

dB
mm(in.)
mm(in.)
mm(in.)

kg(lbs.)

PL-1.6KAKL PL-2KAKL PL-2.5KAKL

3,800

13,000

–
–
–
–

1.54/-

PL-1.6KAKL

0.03

13-15

460-530

–
–

31-35

–

32 (1-1/4)

660 (26)
660 (26)
253 (10)

19 (42)

760 (30)
760 (30)

30 (1-1/8)

3.7 (8)

PU-1.6VLJA

–

1.2/-

0.065

45(1588)

–

49/–

870(34-1/4)

650(25-5/8)

45(99)

Galvanized sheets with gray heat insulation

Remote control & Built-in

Munsell 0.70Y 8.59/0.97

1.TH

Inner thermostat, HP switch, LP switch

PU-2VJA1.TH, PU-2NJA.TH

5,600

19,100

5,600

19,000

4,500

15,400

2.57/2.59

PL-2KAKL

0.03

13-16

460-565

13-16

460-565

0 (Direct blow)

32-37
32-37

32 (1-1/4)

660 (26)
660 (26)
253 (10)

19 (42)

760 (30)
760 (30)

30 (1-1/8)

3.7 (8)

Munsell 3.0Y 7.8/1.1

Capillary tube

32/–

2.0/1.5

0.065
45(1588)
45(1588)

49/50

870(34-1/4)

295+24(11-5/8+1)

650(25-5/8)

60(132)

PL-2.5KAKL

PU-2.5VJA1.TH, PU-2.5NJA.TH

850(33-7/16)

6,500

22,200

7,000

23,900

5,950

20,300

2.59/3.05

0.03

14-17

495-600

14-17

495-600

35-39.5
35-39.5

32 (1-1/4)

660 (26)
660 (26)
253 (10)

20 (44)

760 (30)
760 (30)

30 (1-1/8)

3.7 (8)

32/–

2.0/1.7

0.085
50(1765)
50(1765)

52/53

870(34-1/4)

71(157)

6

2-2. POWER SUPPLY & MODEL NAMES

A

kW

A

N : 220V 60Hz

PL-2KAKL

0.65

0.14

0.72

PU-2NJA.TH

PL-2.5KAKL

0.66

0.14

0.73

PU-2.5NJA.TH

Power supply (1 Phase)

Indoor unit Service Ref.

Current
Input
Starting current

Outdoor unit Service Ref.

Power supply

50Hz

1ph.

Service Ref. (Indoor unit) PL-1.6KAK

220V
220, 230, 240V

–

PU-1.6VLJA

Model name (Outdoor unit)

PL-2KAK

–

1.TH

PU-2VJA1.TH

PL-2.5KAK

–

PU-2.5VJA1.TH

Power supply

Service Ref. (Indoor unit) PL-1.6KAKL

50Hz

1ph.

220V
220, 230, 240V

60Hz

1ph.

Notes : 1. Power supply key N

220V

......

1ph, 220V, 60Hz

...

V(L)

1ph, 220, 230, 240V, 50Hz

2. Primary power supplies for all indoor units are single-phase.

2-3. ELECTRICAL SPECIFICATIONS

(1) Rating conditions -JIS B 8616
Series PL Indoor Unit (Single Phase)

Power supply (1 Phase)

Indoor unit Service Ref.

Current
Input
Starting current

Outdoor unit Service Ref.

A

kW

A

PU-1.6VLJA1.TH

Indoor : D.B. 27°C (80°F), W.B. 19°C (66°F)
Outdoor : D.B. 35°C (95°F), W.B. 24°C (75°F)

V : 220V 50Hz V : 230V 50Hz

PL-1.6KAK(L)

0.59

0.12

0.65

PL-2KAK(L)

0.60

0.13

0.66

PU-2VJA

1.TH

–

PU-1.6VLJA

–

PL-2.5KAK(L)

0.60

0.13

0.66

PU-2.5VJA1.TH

Model name (Outdoor unit)

PL-2KAKL

–

1.TH

PL-1.6KAK(L)

PU-2VJA

PU-2NJA

1.TH
.TH

PL-2KAK(L)

0.62

0.13

0.68

PU-1.6VLJA1.TH

PU-2VJA

0.63

0.14

0.69

PL-2.5KAKL

PU-2.5VJA

PU-2.5NJA

PL-2.5KAK(L)

1.TH

PU-2.5VJA1.TH

–

1.TH
.TH

0.63

0.14

0.69

Power supply (1 Phase)

Indoor unit Service Ref.

Current
Input
Starting current

Outdoor unit Service Ref.

(2) Rating conditions -SSA 385,386
Series PL Indoor Unit (Single Phase)

A

kW

A

PL-1.6KAK(L)

0.64

0.14

0.70

PU-1.6VLJA1.TH

Indoor : D.B. 27°C (80°F), W.B. 19°C (66°F)

Outdoor : D.B. 35°C (95°F), W.B. 24°C (75°F)

V : 240V 50Hz N : 220V 60Hz

PL-2KAK(L)

0.65

0.15

0.72

PU-2VJA

1.TH

PL-2.5KAK(L)

0.65

0.15

0.72

PU-2.5VJA1.TH

PL-2KAKL

0.65

0.14

0.72

PU-2NJA.TH

PL-2.5KAKL

PU-2.5NJA.TH

7

0.66

0.14

0.73

3

PL-2.5KAK(L)PL-2KAK(L)

17

0.10

0.75

Evaporator airflow (CMM)

Bypass factors

S.H.F. at rating conditions

16

0.19

0.74

15

0.14

0.80

Service Ref.

Temperature

16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

PL-1.6KAK(L)

0.81

0.82

0.83

0.83

0.84

0.85
16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

3.8

4.0

4.1

4.2

4.3

4.5

0.83

0.85

0.86

0.86

0.87

0.88

5.4

5.8

6.0

6.1

6.2

6.6

0.84

0.85

0.86

0.87

0.87

0.88

6.4

6.8

7.0

7.2

7.3

7.8

0.83

0.85

0.86

0.86

0.87

0.88

16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

3.5

3.7

3.8

3.8

3.9

4.2

0.97

0.99

1.00

1.01

1.02

1.04

5.0

5.4

5.6

5.7

5.8

6.1

0.96

0.99

1.00

1.01

1.01

1.03

5.9

6.3

6.5

6.6

6.7

7.2

0.97

0.99

1.00

1.01

1.02

1.04

1.03

1.05

1.06

1.07

1.08

1.12
16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

3.3

3.6

3.6

3.7

3.8

4.1

1.03

1.05

1.06

1.07

1.08

1.12

4.8

5.1

5.3

5.3

5.4

5.8

1.03

1.06

1.08

1.08

1.09

1.12

5.7

6.1

6.2

6.3

6.4

7.0

1.03

1.05

1.06

1.07

1.08

1.12

1.09

1.12

1.14

1.15

1.16

1.20

3.2

3.3

3.5

3.6

3.6

3.8

1.10

1.13

1.15

1.16

1.17

1.21

4.5

4.9

5.0

5.1

5.2

5.6

1.11

1.13

1.15

1.16

1.17

1.22

5.4

5.7

6.0

6.1

6.2

6.6

1.10

1.13

1.15

1.16

1.17

1.21

1.16

1.19

1.21

1.22

1.23

1.28

4.3

4.6

4.8

4.8

4.9

5.3

1.18

1.21

1.24

1.25

1.26

1.32

5.0

5.3

5.5

5.6

5.7

6.2

1.18

1.22

1.24

1.25

1.26

1.32

16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

3.6

3.8

4.0

4.0

4.1

4.3

0.90

0.92

0.93

0.93

0.94

0.96

5.2

5.6

5.8

5.9

5.9

6.3

0.90

0.92

0.93

0.94

0.94

0.96

6.2

6.6

6.8

6.8

7.0

7.4

0.90

0.92

0.93

0.93

0.94

0.96

21°C

(69.8°F)

25°C

(77°F)

30°C

(86°F)

32.2°C
(90°F)

35°C

(95°F)

40°C

(104°F)

40.6°C

(105°F)

45°C

(113°F)

46°C

(115°F)

50°C

(122°F)

52°C

(125.5°F)

16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

3.8

4.1

4.2

4.3

4.3

4.6

3.6

3.8

3.9

4.0

4.1

4.3

3.3

3.6

3.6

3.7

3.8

4.1

3.2

3.4

3.5

3.6

3.7

3.9

5.6

5.9

6.1

6.2

6.3

6.7

6.6

7.0

7.2

7.3

7.4

7.8

5.2

5.5

5.7

5.7

5.8

6.2

6.1

6.5

6.7

6.8

7.0

7.4

4.8

5.2

5.3

5.4

5.5

5.9

5.7

6.1

6.2

6.3

6.4

7.0

4.6

4.9

5.1

5.1

5.2

6.2

5.5

5.8

6.0

6.2

6.3

6.6

4.3

4.6

4.8

4.9

5.0

5.4

5.1

5.5

5.7

5.7

5.9

6.2

0.81

0.82

0.83

0.83

0.84

0.85

0.81

0.82

0.83

0.84

0.84

0.85

0.91

0.93

0.95

0.95

0.96

0.98

0.93

0.95

0.96

0.97

0.97

0.99

0.91

0.93

0.95

0.95

0.96

0.98

1.03

1.05

1.06

1.07

1.08

1.12

1.03

1.06

1.07

1.08

1.08

1.12

1.09

1.12

1.14

1.15

1.16

1.20

1.09

1.12

1.14

1.15

1.16

1.20

1.16

1.19

1.21

1.22

1.23

1.28

Indoor W.B.Outdoor D.B.

T.C. C.F.

(T.I.)

C.F.
(T.I.)

T.C.C.F.

(T.I.)

T.C.

DATA

3-1. PERFORMANCE DATA

Cooling capacity 50Hz

Notes : 1. T.C. : Total capacity (kW) ... (kcal/h) = (kW) ✕ 860, (Btu/h) = 4 ✕ (kW) ✕ 860

Cooling capacity correction factors 50Hz

Service Ref.

PL-1.6KAK(L)
PL-2KAK(L)
PL-2.5KAK(L)

C.F. (T.I.) : Correction factors of Total input (Indoor unit input + Outdoor unit input)

2. (°F) = 32 + 9 / 5 (°C)

3. Guaranteed operation range (cooling) :
Lower limit ... Indoor : D.B. 21°C (70°F), W.B. 15.5°C (60°F), Outdoor : D.B. 21°C (70°F).
Upper limit ... Indoor : D.B. 35°C (95°F), W.B. 22.5°C (72.5°F), Outdoor : D.B. 52°C (125.5°F). w

5m (16ft)

1.0

1.0

1.0

10m (33ft)

0.992

0.985

0.983

15m (49ft)

0.987

0.975

0.972

0.982

0.964

0.961

8

wVL ... Outdoor : D.B. 46°C (115°F).

25m (82ft)

–

0.954

0.951

Refrigerant piping length (one way)

20m (66ft)

30m (98ft)

–

0.944

0.940

35m (115ft)

–
–
–

40m (131ft)

–
–
–

Cooling capacity 60Hz

PL-2.5KAKL

17

0.09

0.79

Evaporator airflow (CMM)

Bypass factors

S.H.F. at rating conditions

16

0.19

0.74

Service Ref.

Temperature

16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

PL-2KAKL

16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

5.4

5.8

6.0

6.1

6.2

6.6

0.84

0.85

0.86

0.87

0.87

0.88

6.9

7.4

7.6

7.7

7.8

8.3

16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

5.0

5.4

5.6

5.7

5.8

6.1

0.96

0.99

1.00

1.01

1.01

1.03

6.4

6.8

7.0

7.1

7.2

7.7

16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

4.8

5.1

5.3

5.3

5.4

5.8

1.03

1.06

1.08

1.08

1.09

1.12

6.1

6.6

6.7

6.8

6.9

7.5

4.5

4.9

5.0

5.1

5.2

5.6

1.11

1.13

1.15

1.16

1.17

1.22

5.8

6.2

6.4

6.6

6.7

7.1

4.3

4.6

4.8

4.8

4.9

5.3

1.18

1.21

1.24

1.25

1.26

1.32

5.4

5.7

6.0

6.0

6.2

6.7

16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

5.2

5.6

5.8

5.9

5.9

6.3

0.90

0.92

0.93

0.94

0.94

0.96

6.7

7.1

7.3

7.4

7.5

8.0

21°C

(69.8°F)

25°C

(77°F)

30°C

(86°F)

32.2°C
(90°F)

35°C

(95°F)

40°C

(104°F)

40.6°C

(105°F)

45°C

(113°F)

46°C

(115°F)

50°C

(122°F)

52°C

(125.5°F)

16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

16°C (60.8°F)
18°C (64.4°F)
19°C (66.2°F)

19.4°C (67°F)
20°C (68°F)
22°C (71.6°F)

5.6

5.9

6.1

6.2

6.3

6.7

5.2

5.5

5.7

5.7

5.8

6.2

4.8

5.2

5.3

5.4

5.5

5.9

4.6

4.9

5.1

5.1

5.2

6.2

4.3

4.6

4.8

4.9

5.0

5.4

0.81

0.82

0.83

0.84

0.84

0.85

0.93

0.95

0.96

0.97

0.97

0.99

1.03

1.06

1.07

1.08

1.08

1.12

1.09

1.12

1.14

1.15

1.16

1.20

1.16

1.19

1.21

1.22

1.23

1.28

0.83

0.85

0.86

0.86

0.87

0.88

0.97

0.99

1.00

1.01

1.02

1.04

1.03

1.05

1.06

1.07

1.08

1.12

1.10

1.13

1.15

1.16

1.17

1.21

1.18

1.22

1.24

1.25

1.26

1.32

0.90

0.92

0.93

0.93

0.94

0.96

0.81

0.82

0.83

0.83

0.84

0.85

0.91

0.93

0.95

0.95

0.96

0.98

1.03

1.05

1.06

1.07

1.08

1.12

1.09

1.12

1.14

1.15

1.16

1.20

1.16

1.19

1.21

1.22

1.23

1.28

7.1

7.5

7.7

7.8

8.0

8.4

6.6

7.0

7.2

7.4

7.5

8.0

6.1

6.6

6.7

6.8

6.9

7.5

5.9

6.2

6.5

6.7

6.8

7.1

5.5

5.9

6.1

6.2

6.3

6.7

Indoor W.B.Outdoor D.B.

C.F.
(T.I.)

T.C.C.F.

(T.I.)

T.C.

Notes : 1. T.C. : Total capacity (kW)

2. (°F) = 32 + 9 / 5 (°C)

3. Guaranteed operation range (cooling) :

Cooling capacity correction factors 60Hz

Service Ref.
PL-2KAKL

PL-2.5KAKL

C.F. (T.I.) : Correction factors of Total input (Indoor unit input + Outdoor unit input)

Lower limit ... Indoor : D.B. 21°C (70°F), W.B. 15.5°C (60°F), Outdoor : D.B. 21°C (70°F).
Upper limit ... Indoor : D.B. 35°C (95°F), W.B. 22.5°C (72.5°F), Outdoor : D.B. 52°C (125.5°F).

5m (16ft)

1.0

1.0

10m (33ft)

0.985

0.978

...

(kcal/h) = (kW) ✕ 860, (Btu/h) = 4 ✕ (kW) ✕ 860

15m (49ft)

0.975

0.963

Refrigerant piping length (one way)

20m (66ft)

0.964

0.948

9

25m (82ft)

0.954

0.934

30m (98ft)

0.944

0.921

35m (115ft)

–
–

40m (131ft)

–
–

3-2. STANDARD OPERATION DATA

Capacity
Input

Indoor unit Service Ref.

phase, Hz
Volts
Amperes

Outdoor unit Service Ref.

phase, Hz
Volts
Amperes
Discharge pressure
Suction pressure
Discharge temperature
Condensing temperature
Suction temperature
Ref. pipe length

Intake air temperature

Discharge air temperature

Intake air temperature

W

kW

V
A

V
A

°C
°C
°C

m

°C
°C
°C
°C
°C

PL-1.6KAK(L)

cooling

3,800

1.54

PL-1.6KAK(L)

1, 50

220

0.59

PU-1.6VLJA1.TH

1, 50

220

7.7

(19.8)

(5.3)

62.3

37.4

8.3
5

27
19

15.9
35
24

cooling

5,600

2.57

1, 50

220

0.60

PU-2VJA

1.TH

1, 50

220

11.3

(19.9)

(4.6)

75.9

48.9

13.1
5

27
19

14.4

35
24

PL-2KAK(L)Service Ref.

Electrical circuit TotalRefrigerant circuit

Indoor side

Outdoor

side

MODE

PL-2.5KAK(L)

PL-2KAK(L) PL-2.5KAK(L)

cooling

5,600

2.59

1, 60

220

0.65

PU-2NJA.TH

1, 60

220

11.9

(19.9)

(4.9)

63.6

46.0

5.8
5

27
19

14.4
35
24

cooling

6,500

2.59

1, 50

220

0.60

PU-2.5VJA

1.TH

1, 50

220

12.5

(19.6)

(4.9)

74.3

46.4

10.3
5

27
19

13.1

35
24

cooling

7,000

3.05

1, 60

220

0.66

PU-2.5NJA.TH

1, 60

220

13.5

(20.7)

(4.8)

83.4

47.6

7.2
5

27
19

13.0
35
24

Mpa

(kgf/F)

Mpa

1.94

0.52

1.95

0.45

1.95

0.48

1.92

0.48

2.03

0.47

(kgf/F)

D.B.

W.B.

D.B.
D.B.

W.B.

The unit of pressure has been changed to Mpa based on the international SI system.
The conversion factor is : 1(Mpa)=10.2(oof/ff)

3-3. ADDITIONAL REFRIGERANT CHARGE (R-22

Service Ref.

PL-1.6KAK(L)
PL-2KAK(L)
PL-2.5KAK(L)

Outdoor unit precharged (kg)

...

V

1.3

...

V

1.78, N

...

V

2.4, N

3-4. OUTLET AIR SPEED AND COVERAGE RANGE

Air flow
Air speed
Coverage range

Standard

Air flow
Air speed
Coverage range

High ceiling

Total width of discharge outlets

w The air coverage range is the value up to the position where the air speed is 0.25 m/sec. when air is blown out horizontally

from the unit at the Hi notch position.
The coverage range should be used only as a general guideline since it varies according to the size of the room and furniture
inside the room.

(up to 20m)

...

1.9

...

2.4

CMM

m/sec.

m

CMM

m/sec.

m

mm

PL-1.6KAK(L)

20m(66ft)

0
0
0

15.0

5.2

5.7

16.0

5.6

6.0
0

10

......

Kg(lbs))

Refrigerant piping length (one way)

25m(82ft)

30m(98ft)

–

0.06(0.13)

0.06(0.13)

0.12(0.26)

0.12(0.26)

PL-2KAK(L)

16.0

5.6

6.0

17.0

5.9

6.4
0

–

35m(115ft)

–
–
–

PL-2.5KAK(L)

17.0

5.9

6.4

18.0

6.3

6.8
0

40m(131ft)

–
–
–

OUTLINES AND DIMENSIONS4

Terminal block for control

Terminal block for
wired remote
controller

Power terminal block

Drain water release hole

Ceiling hole

Ceiling hole

Suspension bolt pitch

640

690~710

25~3525~35

117

186

660

117

13

64

77 507

25~35

145

154

25~35

Suspension bolt pitch

690~710

117117

660

68

2

1

75 65

65~80

115

253

29830

54

+3

-2

42

Drain pipe
Connected to VP-25

Inspection hole
(Drain up machine)

Keep approximately
10 to 15mm space
between unit ceiling and ceilimg slab.

Ceiling side

Suspension bolt M10
or W3/8

Suspension bolt lower edge

Control wire opening

135

435

54

+3

-2

Power switch wire opening

Refrigerant piping side
Wiring arrangement opening side

Connect the attached
flexible pipe or socket.

466

Air intake

460

66 35

6635

760

Air outlet

460

760

Air outlet

466

Air intake

Grille

Vane motor

4-Auto vane

Intake grille
opening closing side.

Intake grille

(Air intake)

Optional multifunctional casement

Optional high performance filter

1 (Liquid) 2 (Gas)

1.6/2/2.5

Refrigerant pipe {9.52
Flaredconnection 3/8F

Refrigerant pipe {15.88
Flaredconnection 5/8F

Note 1:

Note 2:

Note 3:

For the installation of the optional humidifier(suspended type), it
requires minimum 360mm space between transom and ceiling.

Electrical box may be removed for the service purpose. Make
sure to slack the electrical wire little bit for control/power wires
connection.

For the installation of the optional high efficiency filter or optional
multiple casement, it requires minimum 440mm space between
transom and ceiling for the installation (Optional high
performance filter can be also installed).

A

wireless panel

Operation lamp Receiver

Emergency operetion switch(cooling)

A(indication area)

wOnly for PL-1.6/2/2.5KAL

4-1. INDOOR UNIT

PL-1.6KAK / PL-2KAK / PL-2.5KAK
PL-1.6KAKL / PL-2KAKL / PL-2.5KAKL

Unit : mm

11

WIRED REMOTE CONTROLLER

unit : mm

130

120

19

12

WIRELESS REMOTE CONTROLLER

159.3

55

58

19

Unit : mm

13

WIRING DIAGRAM5

SYMBOL

NAME

P.B

INDOOR POWER BOARD

I.B

INDOOR CONTROLLER BOARD

FUSE

FUSE (T6.3AL250V)

ZNR

VARISTOR

BCR

FAN CONTROL ELEMENT

CN2L

CONNECTOR (LOSSNAY)

CN32

CONNECTOR (REMOTE SWITCH)

CN41

CONNECTOR (HA TERMINAL-A)

CN51

CONNECTOR (CENTRALLY CONTROL)

LED1

POWER SUPPLY (I.B)

LED2

POWER SUPPLY (R.B)

X1

RELAY (DRAIN PUMP)

X4

RELAY (FAN MOTOR)

SW1

SWITCH (MODEL SELECTION)

wSee table 1

SW2

SWITCH (CAPACITY CORD)

wSee table 2

SW5

SWITCH (SYSTEM SELECTION)

wSee table 3

SWE,SW6

CONNECTOR (EMERGENCY OPERATION)

[LEGEND]

SYMBOL

NAME

MF

FAN MOTOR

MV

VANE MOTOR

LS

LIM

IT SWITCH

H2

DEW PREVEMTION HEATER

DP

DRAIN-UP MACHINE

DS

DRAIN SENSOR

TB4

TERM

INAL BLOCK (INDOOR/OUTDO

OR CONNECTING LINE)

R.B

WIRED REMOTE CONTROLLER BOARD

TB2

TERMINAL BLOCK (POWER SUPPLY)

TB5,TB6

TERMINAL BLOCK (REMOTE CONTROLLER
TRANSMISSION LINE)

TH1

ROOM TEMP. THERMISTOR
(0

:

/15

", 25

:

/5.4k

" DETECT)

TH2

PIPE TEM

P. THERMISTOR/LIQUID

(0

:

/15k

", 25

:

/5.4k

" DETECT)

C

CAPACITOR (FAN MOTOR)

SYM

BO

L

N

AM

E

W

.B

W

IR

ELESS

R

EM

OTE

C

ON

TR

O

LLER

BO

AR

D

R

U

R

ECE

IVING

U

N

IT

BZ

BU

ZZER

LED

1

LE

D

(R

U

N IN

D

IC

ATO

R

)

SW

1

SW

ITC

H

(H

EATING

O

N

/O

FF)

SW

2

SW

ITCH

(C

O

OLIN

G

O

N

/O

FF)

[Emergency operation procedure

]

1.When the wired remote control or the indoor unit microcomputer has failed,but all other compornents work properly,
if you set the switch (SWE,SW6) on the indoor control board, the indoor unit will begin Emergency Operation.
wNote 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(SW1,SW2 of the wireless signal receiver board)

.

However,if the indoor unit microcomputer has failed,it is nesessary to proceed with points 2 and 3 below as in the ca

se of the wired remote control.

2.When you activate emergency operation of the cooling, you have to set the switch(SWE) and switch (SW6) on the indoor controll

er.

SWE : ON

•

Indoor fan is running at high speed.

•

Drain-up machine is working.

SW6-1 : ON

•

Emergency operation of cooling mode.

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,dose not function.
(3) Avoid operating for a long time when the outdoor unit begins defrosting while emergency operation of the heating is activ

ated, 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.

[Self-diagnosis

]

1.For details on how to operate self-diagnosis with the wireless remote control,refer to the technical manuals etc.

2.For the wired remote control:When you quickly press twice the CHECK switch on the remote control,
the unit begins self-diagnosis. and Check Codes generated in the past appear on the display.
For Check Codes and symptoms refer to the table below.

Check Code

P1
P2

P4
P5

Abnormality of room temperature thermistor (TH1).
Abnormality of pipe temperature thermistor/Liquid (TH2).
Abnormality of drain sensor (DS).

Malfunction of drain-up machine.

Symptom

P6

Freezing / overheating protection is working.

P8

E0-E5

Abnormality in outdoor unit. Refer to outdoor unit wiring diagram.

Abnormality of the signal transmission between remote controller and indoor unit.

Fb

---­FFFF

Abnormality of indoor controller board.
No trouble generated in the past.
No corresponding unit.

MODELS

Table 1

SW

1

Manufacture/Service

PL-KAK
PL-KAKL

O

N

O

F

F

1 2 3 4 5

12345678

O

N

O

F

F

M

O

D

E

LS

S

W

5

Manufacture/Service

PL-KAK
PL-KAKL

1 2 3 4 5

O

N

O

FF

MODELS

Table 2

Table 3

SW2

Manufacture/Service

PL-1.6KAK
PL-1.6KAKL

PL-2KAK
PL-2KAKL

1 2 3 4 5

O

N

O

FF

PL-2.5KAK
PL-2.5KAKL

1 2 3 4 5

O

N

O

FF

Please set the voltage
using the remote controller.
For the setting method,
please refer to the indoor
unit Installation Manual.

SW

6

1 2

ON
O

FF

1

2

3

3

2

1

M

F

C

RED

WHT

BLK

1
3

DS

TH1

1

2

TH2

TB5

1

2

1

2

TB6

R

.B

TRAN

SM

ISSION W

IRES DC12V

5
3
1

1

3

1

3

1

2

3

1

2

1

3

1

3

1

2

1

3

FAN

(WHT)

BCR

VANE

CNV

(GRN)

D.U.M

CNP

(BLU)

D.HEATER

CNC

(RED)

CN90

(WHT)

CN41 CN2L

CN32

CN25

CN51

ZNR

FUSE

X1

LED2

LED1

X3

X4

1

2

1

2

1

2

1

2

2

1

3

D.SENSOR

CN31

(WHT)

LIQUID

CN21

(WHT)

INTAKE

CN20

(RED)

W

IR

E

LE

S

S

X4

X1

X3

ON
OFF

SWE

SW2

SW1

SW5

I.B

DP

H2

2
7

5

10

M

V

G

R

IL

LE

LS

1
6

CN30
(BLK)

O

U

TD

O

O

R

CN2D

(WHT)

POWER

CNDK

(RED)

POWER

CND

(ORN)

POWER

Refer to tables 1, 2 and 3.

RED

WHT

YLW

ORN

R

E

D

B

L

U

B

LK

B

L

U

B

L

K

B

L

K

BLK

BLK

RED

RED

B

LU

B

R

N

B

R

N

VANE

CN23

(GRN

)

YLW

YLW

REMOCON

CN22
(BLU)

1
2
3

L
N

TB4

TB2

R

ED

BLU

G

R

N

/Y

LW

To
outdoor
unit

P

O

W

E

R

S

U

P

P

LY

~(1P

H

A

S

E

)

2

20

-240V

50H

z

220V

60H

z

BZ

CNB

LED1

SW1

SW2

RU

RECEIVER

<F

or P

L-K

A

K

L m

odels>

CN2S

(WHT)

CNSK

(RED)

P.B

DC13.1V

3
2
1

1

2

WHT

NOTES:

1. Symbols used in wiring diagram above are, : Connector, : Terminal (block).

2. Indoor and outdoor connecting wires are made with polarities, make wiring
matching terminal numbers(1, 2, 3).

3. Since the outdoor side electric wiring may change be sure to check the outdoor

W.B.

PL-1.6KAK / PL-2KAK / PL-2.5KAK / PL-1.6KAKL / PL-2KAKL / PL-2.5KAKL

14

6

Indoor heat
exchanger

Distributor
with
strainer

Indoor coil
thermistor
TH2

INDOOR UNIT

PL-1.6KAK(L)
PL-2KAK(L)

OUTDOOR UNIT

PU-1.6JA
PU-2JA

Outdoor heat
exchanger

Capillary tube
for injection
(Only PU-2)

Flexible tube

Flared
connection

Flared
connection

Ball valve

(with service port)
Refrigerant pipe {9.52(3/8)
(With insulator) option

Refrigerant pipe {15.88(5/8)
(With insulator) option

Accumulator

Compressor

Capillary tube

Capillary tube size

: flow of refrigerant

PU-1.6(O.D.3.2 X I.D.1.8– L900)
PU-2 (O.D.3.2 X I.D.2.0– L430)

Strainer

Check
plug

High pressure
switch

Low pressure
switch

Charge
plug

Ball
valve

INDOOR UNIT

PL-2.5KAK(L)

OUTDOOR UNIT

PU-2.5JA

Outdoor heat
exchanger

Capillary tube
PU-2.5
(O.D.3.2 X I.D.1.6 – L760)
x2pcs

Flexible tube

Flared
connection

Flared
connection

Ball valve

(with service port)
Refrigerant pipe {9.52(3/8)
(With insulator) option

Refrigerant pipe {15.88(5/8)
(With insulator) option

Accumulator

Compressor

: flow of refrigerant

Muffler

Strainer

High
pressure
switch

Low pressure
switch

Charge
plug

Check
plug

Ball
valve

Indoor heat
exchanger

Distributor
with
strainer

Indoor coil
thermistor
TH2

REFRIGERANT SYSTEM DIAGRAM

PL-1.6KAK(L) / PU-1.6VLJA1.TH
PL-2KAK(L) / PU-2VJA1.TH, PU-2NJA.TH

Unit : mm

PL-2.5KAK(L) / PU-2.5VJA

1.TH, PU-2.5NJA.TH

Unit : mm

15

7 TROUBLESHOOTING

Unit conditions at service

Error code

Actions to be taken for service (summary)

The inferior phenomenon is
reoccurring.

Displayed

Not displayed

Judge what is wrong and take a corrective action
according to “SELF-DIAGNOSIS ACTION TABLE” (7-3).

Identify the cause of the inferior phenomenon and take
a corrective action according to “TROUBLESHOOTING
BY INFERIOR PHENOMENA ” (7-4).

The inferior phenomenon is
not reoccurring.

Logged

Not logged

1Consider the temporary defects such as the work of
protection devices in the refrigerant circuit including
compressor, poor connection of wiring, noise and etc.
Re-check the symptom, and check the installation
environment, refrigerant amount, weather when the
inferior phenomenon occurred, and wiring related.
2Reset error code logs and restart the unit after finishing
service.
3There is no abnormality in electrical components,
controller boards, and remote controller.

1Recheck the abnormal symptom.
2Identify the cause of the inferior phenomenon and take

a corrective action according to “TROUBLESHOOTING
BY INFERIOR PHENOMENA ” (7-4).
3Continue to operate unit for the time being if the cause
is not ascertained.
4There is no abnormality in electrical components,
controller boards, remote controller etc.

PAR-21MAA

ON/OFF

FILTER

CHECK

OPERATION

CLEAR

TEST

TEMP.

MENU

BACK DAY

MONITOR/SET

CLOCK

ON/OFF

ERROR CODE

ERROR CODE

ERROR CODE

1 Turn on the power.
2 Press the [CHECK] button twice.
3 Set address with [TEMP] button if system control is used.
4 Press the [ON/OFF] button to stop the self-check.

A CHECK button
B Address
C TEMP. button
D IC : Indoor unit

OC: Outdoor unit
E Check code

F Unit No.
G Timer ON/OFF button

A

F

C

BBEED

G

<To delete check code>

1 Display the error code at the self-check result display screen.
2 The address for self-check will blink when the

G ON/OFF

button is pressed twice within three seconds.

– – – – : No trouble generated in the past.
F F F F : No corresponding unit.

7-1. 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,which depends on whether or not the the inferior phenomenon is reoccurring at service, are
summarized in the table below. Check the contents below before investigating details.

7-2. 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.

■ Wired remote controller

16

<Malfunction-diagnosis method at maintenance service>

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

Address
display

HOUR
button

ON/OFF
button

[Output pattern A] Errors detected by indoor unit

*1If the beeper does not sound again after the initial

two beeps to confirm the self-check start signal was received and

the OPERATION INDICATOR lamp does not come on,

there are no error records.

*2If the beeper sounds three times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 sec.)” after the initial two beeps to confirm

the self-check start signal was received, the specified refrigerant address is incorrect.

OPERATION
INDICATOR
lamp flash
pattern

Beep

Beep Beep Beep Beep Beep Beep

Off

Approx. 2.5 sec.On0.5 sec.On0.5 sec.On0.5 sec.

On

0.5 sec.

Off

Approx. 2.5 sec.On0.5 sec.On0.5 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

n

th

1st2nd3

rd

1st2

nd

Self-check
starts
(Start signal
received)

Beeper sounds

• Refer to the following tables for details on the check codes.
[Output pattern A]

• On wireless remote controller

2The continuous buzzer sounds from receiving section of indoor unit.
3Blink of operation lamp

• On wired remote controller

1Check code displayed in the LCD.

Beeper sounds/OPERATION

INDICATOR lamp flashes 1 Check code

Symptom Remark

(Number of times)

Wireless remote controller

Wired remote controller

1P1

Intake sensor error

2

P2 Pipe (TH2) sensor error

4 P4 Drain sensor error
5

P5
PA

Drain pump error

Forced compressor stop
6 P6 Freezing/ Overheating safeguard operation
8 P8 Pipe temperature error / Outdoor unit error
9 E4, E5 Remote controller signal receiving error

10

–

11

–

–
–

12 Fb Indoor unit control system error (memory error, etc.)

–

E0, E3

– E1, E2 Remote controller control board error

Remote controller transmission error

■ Wireless remote controller

[Procedure]

1. Press the CHECK button twice.

• "CHECK" lights, and address "00" flash­es.

• Check that the remote controller's
display has stopped before continuing.

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.

• Select the address of the indoor unit
for the self-diagnosis.

Main indoor unit : “00”
Sub indoor unit : “01”

• If an air conditioner error occurs, the
indoor unit's sensor emits an intermit­tent 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.

17

Symptom

Cause

Wired remote controller

On the wireless remote controller with condition above, following phenomena takes place.

• No signals from the remote controller are accepted.

• Operation lamp is blinking.

• The buzzer makes a short piping sound.

PLEASE WAIT

PLEASE WAIT → Error code

Display messages do not
appear even when operation
switch is turned ON (operation
lamp does not light up).

For about 2
minutes follow­ing power-on

After about 2
minutes has
expired follow­ing power-on

• 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
device is not connected.

•Reverse or open phase wiring for the outdoor
unit’s power terminal block

•Incorrect wiring between indoor and outdoor
units

•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) provided on the indoor controller, refer to the following table.

LED1 (power for microcomputer) Indicates whether control power is supplied. Make sure that this LED is

always lit.

LED2 (power for wired remote controller)

Indicates whether power is supplied to the wired remote controller.
This LED lights only in the case of the main indoor unit.

•

If the unit cannot be operated properly after test run has been performed, refer to the following table to remove the cause.

18

7-3. SELF-DIAGNOSIS ACTION TABLE

Error Code

P1

P2

Meaning of error code and detection method

Abnormality of room temperature
thermistor (TH1)

1 The unit is in three-minute resume

prevention mode if short/open of
thermistor is detected. Abnormal if the
unit does not reset normally after three
minutes. (The unit returns to normal
operation, if it has normally reset.)

2 Constantly detected during cooling,

drying, and heating operation.
Short: 90: or more
Open: -40: or less

Abnormality of pipe temperature
thermistor/Liquid (TH2)

1 The unit is in three-minute resume

prevention mode if short/open of
thermistor is detected. Abnormal if the
unit does not reset normally after three
minutes. (The unit returns to normal
operation, if it has normally reset.)

2 Constantly detected during cooling,

drying, and heating (except defrosting)
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.

1 Defective thermistor

characteristics.

2 Contact failure of connector

(CN21) 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.

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 7-7.
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.

1–3 Check resistance value of thermistor.
For characteristics, refer to (P1) above.
2 Check contact failure of connector (CN21) on

the indoor controller board. Refer to 7-7. 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 exclusively 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 exclusive
difference with actual pipe <liquid> temperature,
replace indoor controller board.

P4

P5

Abnormality of drain sensor (DS)

1 Suspensive abnormality, if short/open of

thermistor is detected for 30 seconds
continuously.
Turn off compressor and indoor fan.

2 Short/open is detected for 30 seconds

continuously during suspensive
abnormality.
(The unit returns to normal operation,

if it has normally reset.)

3 Detect the following condition.

• During cooling and drying operation.

• In case that pipe <liquid> temperature

- room temperature <-10deg
(Except defrosting)

• When pipe <liquid> temperature or
room temperature is short/open
temperature.

• During drain pump operation.

Malfunction of drain pump (DP)

1 Suspensive abnormality, if thermistor

of drain sensor is let heat itself and
temperature rises slightly. Turn off
compressor and indoor fan.

2 Drain pump is abnormal if the condition

above is detected during suspensive
abnormality.

3 Constantly detected during drain pump

operation.

1 Defective thermistor

characteristics

2 Contact failure of connector

(CN31) on the indoor controller
board. (Insert failure).

3 Breaking of wire or contact

failure of drain sensor wiring.

4 Defective indoor controller board.

1 Malfunction of drain pump
2 Defective drain

Clogged drain pump
Clogged drain pipe

3 Attached drop of water at the

drain sensor

• Drops of drain trickles from
lead wire.

• Clogged filter is causing
wave of drain.

4 Defective indoor controller board.

Turn the power off, and on again to operate
after check.

1–3 Check resistance value of thermistor.
0: ······6.0k"
10: ····3.9k"
20: ····2.6k"
30: ····1.8k"
40: ····1.3k"
2 Check contact failure of connector (CN31) on

the indoor controller board. Refer to 7-7. Turn
the power on again and check restart after
inserting connector again.

4 Replace indoor controller board if drain

pump operates with the line of drain sensor
connector CN31-1 and 2 is short-circuited,
and abnormality reappears.

Turn the power off, and on again to operate
after check.

1 Check if drain-up machine works.
2 Check drain function.
3 Check the setting of lead wire of drain sensor

and check clogs of the filter.

4 Replace indoor controller board if drain

pump operates with the line of drain sensor
connector CN31-1 and 2 is short-circuited
and abnormality reappears.
Refer to 7-7.

Turn the power off, and on again to operate
after check.

19

Error Code

P6

Meaning of error code and detection method
Freezing/overheating protection is

working

1 Freezing protection (Cooling mode)

The unit is in six-minute resume prevention
mode if pipe <liquid or condenser/evap­orator> temperature stays under

-15: for three minutes, three minutes
after the compressor started. Abnormal
if it stays under -15: for three minutes
again within 16 minutes after six-minute
resume prevention mode.
<Frost prevention mode>
If pipe <liquid or condenser-evaporator>
temperature is 1: or below when 16
minutes has passed after compressor
starts operating, unit will start operating
in frost prevention mode which stops
compressor operation. After that, when
pipe <liquid or condenser/evaporator>
temperature stays 10: or more for 3
minutes, frost prevention mode will be
released and compressor will restart its
operation.

(Cooling or drying mode)

1 Clogged filter (reduced airflow)
2 Short cycle of air path
3 Low-load (low temperature)

4 Defective indoor fan motor

• Fan motor is defective.

• Indoor controller board is

5 Defective outdoor fan control
6 Overcharge of refrigerant
7 Defective refrigerant circuit

Cause

operation beyond the tolerance
range

defective.

(clogs)

Countermeasure

(Cooling or drying mode)

1 Check clogs of the filter.
2 Remove shields.

4 Measure the resistance of fan motor's winding.

Measure the output voltage of fan's connector
(FAN) on the indoor controller board.
WThe indoor controller board should be

normal when voltage of AC 220~240V is
detected while fan motor is connected.
Refer to 7-7.

5 Check outdoor fan motor.
67 Check operating condition of refrigerant

circuit.

P8

Abnormality of pipe temperature

<Cooling mode>
Detected as abnormal when the pipe tem­perature is not in the cooling range 3 min­utes later of compressor start and 6 min­utes later of the liquid pipe is out of cooling
range.
Note 1) It takes at least 9 min. to detect.
Note 2) Abnormality P8 is not detected in

drying mode.
Cooling range : -5 deg ] (TH2-TH1)
TH2: Liquid pipe temperature
TH1: Intake temperature

Abnormality in outdoor unit

1 Slight temperature difference

between indoor room
temperature and pipe tempera­ture thermistor

• Shortage of refrigerant

• Disconnected holder of pipe
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
temperature thermistor

5 Stop valve is not opened

completely.

1 Wrong wiring of indoor/outdoor

connecting wire

2 Reversed phase
3 Protection device is working
4 Damaged outdoor coil thermis-

tor

1~4 Check pipe temperature with room

temperature display on remote
controller.

23Check converse connection of extension

pipe or converse wiring of indoor/outdoor
unit connecting wire.

1 Check the indoor/outdoor connecting wire.
2 Change the connection of electric wiring.
3 Check the protection device.
4 Measure the resistance of the outdoor coil

thermistor. If the resistance is normal,
replace the outdoor controller board.

20