Mitsubishi OC390 Service Manual

SPLIT-TYPE, AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

April 2006

No. OC390

Indoor unit
[Model names] [Service Ref.]

PK-2.5FAKL PK-2.5FAKL
PK-3FAKL PK-3FAKL
PK-4FAKL PK-4FAKL

NOTE:

• This manual does not
cover outdoor units.
When servicing outdoor
units, please refer to the
service manual
OC206,OC353 and this
manual in a set.

No.OC152,

Indoor unit

Remote controller

Model name
indication

CONTENTS

1. PART NAMES AND FUNCTIONS ···················2

2. SPECIFICATIONS············································4

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

4. OUTLINES AND DIMENSIONS·····················12

5. WIRING DIAGRAM ········································15

6. REFRIGERANT SYSTEM DIAGRAM············16

7. TROUBLESHOOTING ···································17

8. FUNCTION SETTING·····································30

9. SYSTEM CONTROL ·····································33

10. DISASSEMBLY PROCEDURE ······················47

11. PARTS LIST···················································50

12. OPTIONAL PARTS·························Back Cover

1 PART NAMES AND FUNCTIONS

Air intake

room air is suctioned
in here.

(Removes dust and dirt from the intake air.)

Disperses airflow up and
down as well as adjusts the
angle of air flow direction.

Filter Air intake grille

Air outletAir outlet

Swing louvers

Indicator lamp section

Air flow can be changed to horizontally
by moving the Guide vane to the left or
right.

Guide vane

● Indoor Unit

2

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

3

2

w4
w5

22,700

6,650

3.54

3.44

15.8(99)
58

27/19.0°C, 35/24°C

Cooling (JIS B8616)

PK-2.5FAKL

PK-2.5FAKL

Munsell 3.4Y 7.7/0.8(White)

Plate fin coil

Line flow (direct) o 2

0.04

15 - 20(530-706)

0 (direct blow)

—

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)

23,900

7,000

2.56 / 2.62

PU-2.5VJA

1.TH

Single, 50Hz, 220/240V

2.46 / 2.52

11.4 / 10.7 (98/98)
45 / 49

24,400

7,150

3.01

PU-2.5NJA.TH

Single, 60Hz, 220V

2.91

13.4 (99)
58

Munsell 3.0Y 7.8/1.1

Capillary tube

Hermetic

Line start

Inner thermostat, HP/LP switch

Plate fin coil

Propeller (direct) o 1

0.085

50 (1765)

—

870 (34-1/4)

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

850 (33-7/16)

71 (157)

9.52 (3/8)

15.88 (5/8)
Flared
Flared

w3 Max. 20m
w3 Max. 30m

NHJ41VMDT

2.0

32 / 38

NHJ38NBDT

1.7

—

52 53

R-22 2.4 (5.3) R-22 2.4 (5.3)

Single, 60Hz, 220V

0.095

0.44 (98)

0.7

Single, 50Hz, 220/240V

0.095 / 0.095

0.44 / 0.44 (98/90)

0.7 / 0.8

Item

Service Ref.

Condition
Capacity w1
Total input w1

Service Ref.
Power supply(phase, cycle, voltage)

Input

Running current (Power factor)

Starting current
External finish
Heat exchanger

Fan(drive) o No.

Fan motor output

Airflow (Low-High)

External static pressure
Booster heater
Operation control & Thermostat
Noise level (Low-High) w2
Unit drain pipe. O.D.

Dimensions

Weight
Service Ref.
Power supply (phase, cycle, voltage)

Input

Running current (Power factor)

Starting current
External finish
Refrigerant control
Compressor

Model

Motor output

Starter type

Protection devices

Crankcase heater
Heat exchanger

Fan(drive) o No.

Fan motor output

Airflow
Defrost method
Noise level w2

Dimensions

Weight
Refrigerant Charge

Pipe size O.D.

Connection method
Between the indoor &

outdoor units

Btu/h

W

kW

kW

A(%)

A

kW

m

3

/min(CFM)

Pa(mmAq)

kW

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

kg(lbs)

kW

A(%)

A

kW

W

kW

m

3

/min(CFM)

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

kg(lbs)

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

Indoor, Outdoor D.B./W.B.°C

Liquid

Gas

W

D
H

W

D
H

REFRIGERANT PIPING

OUTDOOR UNIT

Indoor side
Outdoor side
Height difference
Piping length

INDOOR UNIT

Fan

Fan

SPECIFICATIONS

2-1. STANDARD SPECIFICATION

w1 Refrigerant piping length (one way) : 5m (16ft)
w2 Noise level is measured in an unacoustic room based on JIS conditions.
w3 Up to 20m it is unnecessary to charge additional refrigerant.
w4 Indoor, Outdoor D.B./W.B. : 29/19°C, 46/24°C.
w5 Cooling SSA385, 386

4

Item

Indoor, Outdoor D.B./W.B.°C

Condition
Capacity w1
Total input w1

Service Ref.
Power supply(phase, cycle, voltage)

Input

Running current (Power factor)

Starting current
External finish
Heat exchanger
Fan

Booster heater

INDOOR UNIT

Operation control & Thermostat
Noise level (Low-High) w2
Unit drain pipe. O.D.

Dimensions

Weight
Service Ref.
Power supply (phase, cycle, voltage)

External finish
Refrigerant control
Compressor

Heat exchanger

OUTDOOR UNIT

Fan

Defrost method
Noise level w2

Dimensions

Weight
Refrigerant Charge

Pipe size O.D.

Connection method
Between the indoor &

outdoor units

REFRIGERANT PIPING

Fan(drive) o No.

Fan motor output

Airflow (Low-High)

External static pressure

Input

Running current (Power factor)

Starting current

Model

Motor output

Starter type

Protection devices

Crankcase heater

Fan(drive) o No.

Fan motor output

Airflow

Indoor side
Outdoor side
Height difference
Piping length

W

D
H

W

D
H

Liquid

Gas

Service Ref.

Btu/h

W

kW

kW

A(%)

A

kW

3

/min(CFM)

m

Pa(mmAq)

kW

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

kg(lbs)

kW

A(%)

A

kW

W

kW

3

/min(CFM)

m

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

kg(lbs)

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

27,000

7,900

3.28 / 3.30 3.28 / 3.30

Single, 50Hz, 220/240V

0.095 / 0.095

0.44 / 0.44 (98/90)

0.7 / 0.8
Munsell 3.4Y 7.7/0.8(White)

Wireless remote controller & Built-in

PU-3VJC

Single, 50Hz, 220/240V

15.1/13.9(96/96)

NH52VNHT

1.TH

3.18 / 3.20

54 / 58

2.2

w6 w7

32 / 38 32 / 38 38

R-22 2.8 (6.2)

PU-3YJC.TH

3, 50Hz, 380/415V

3.18 / 3.20

5.7/5.3(85/84)

NH52YDAT

52 53

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

PK-3FAKL

27/19.0°C, 35/24°C

Cooling (JIS B8616)

PK-3FAKL

Plate fin coil

Line flow (direct) o 2

15 - 20 (530-706)

0 (direct blow)

39 - 45

20 (13/16)

1,400 (55-1/8)

235 (9-1/4)

340 (13-3/8)

24 (53)

34 / 37

Munsell 3.0Y 7.8/1.1

Capillary tube

Hermetic

2.4
Line start

Plate fin coil

Propeller (direct) o 1

50 (1765)

870 (34-1/4)

850 (33-7/16)

73 (161)

9.52 (3/8)

15.88 (5/8)

w3 Max. 20m
w3 Max. 30m

w1 Refrigerant piping length (one way) : 5m (16ft)
w2 Noise level is measured in an unacoustic room based on JIS conditions.
w3 Up to 20m it is unnecessary to charge additional refrigerant.
w4 Indoor, Outdoor D.B./W.B. : 29/19°C, 46/24°C
w5 Cooling SSA385, 386
w6 Inner thermostat, HP switch, LP switch.
w7 Thermal switch, Reversed-phase protector, HP switch, LP switch, Thermal relay.

0.04

—

0.085

—

Flared
Flared

27,300

8,000

3.54

Single, 60Hz, 220V

0.095

0.44 (98)

0.7

PU-3NJA.TH

Single, 60Hz, 220V

3.44

17.6(89)
80

NHJ47NADT

2.2

w6

R-22 3.5 (7.7)

w4
w5

23,500

6,900

4.19

4.09

20.9(89)
80

5

Item

Service Ref.

PK-4FAKL

27/19.0°C, 35/24°C

Cooling (JIS B8616)

w4
w5

33,800

9,900

5.08

37,500
11,000

4.38

33,400

9,800

3.46 / 3.63 3.40 / 3.47

PU-4VLJSA

2.TH

Single, 50Hz, 220/240V

3.35 / 3.52

16.9 / 16.3 (90/90)
79 / 79

PU-4YJSA

1.TH

3, 50Hz, 380/415V

3.29 / 3.36

5.7 / 5.5 (87/85)
38 / 38

NH56VNDT

2.7

NHJ56YDAT

2.7
Line start

Munsell 3.0Y 7.8/1.1

Capillary tube

Hermetic

Plate fin coil

Propeller (direct) o 2

0.065 + 0.065
95 (3352)

—

870 (34-1/4)

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

1258 (49-1/2)

94 (207)

9.52 (3/8)

19.05 (4/3)
Flared
Flared

w3 Max. 30m
w3 Max. 40m

PU-4TJSA.TH

3, 60Hz, 220V

4.27

12.2 (92)
69

NHJ56TKAT

2.7

w6 w7 w7

54 55 55

32 / 38 32 / 38 38

R-22 3.8 (8.4) R-22 4.6 (10.1) R-22 4.6 (10.1)

4.97

14.0(93)
69

PK-4FAKL

Munsell 3.4Y 7.7/0.8(White)

Plate fin coil

Line flow (direct) o 2

0.07

22 - 28 (777 - 989)

0 (direct blow)

—

Wireless remote controller & Built-in

41 - 46

20 (13/16)

1,680 (66-1/8)

235 (9-1/4)

340 (13-3/8)

28 (62)

Single, 50Hz, 220/240V

0.114 / 0.114

0.53 / 0.53 (98/90)

0.8 / 0.9

Single, 60Hz, 220V

0.114

0.53 (98)

0.8

Condition
Capacity w1
Total input w1

Service Ref.
Power supply(phase, cycle, voltage)

Input

Running current (Power factor)

Starting current
External finish
Heat exchanger

Fan(drive) o No.

Fan motor output

Airflow (Low-High)

External static pressure
Booster heater
Operation control & Thermostat
Noise level (Low-High) w2
Unit drain pipe. O.D.

Dimensions

Weight
Service Ref.
Power supply (phase, cycle, voltage)

Input

Running current (Power factor)

Starting current
External finish
Refrigerant control
Compressor

Model

Motor output

Starter type

Protection devices

Crankcase heater
Heat exchanger

Fan(drive) o No.

Fan motor output

Airflow
Defrost method
Noise level w2

Dimensions

Weight
Refrigerant Charge

Pipe size O.D.

Connection method
Between the indoor &

outdoor units

Btu/h

W

kW

kW

A(%)

A

kW

m

3

/min(CFM)

Pa(mmAq)

kW

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

kg(lbs)

kW

A(%)

A

kW

W

kW

m

3

/min(CFM)

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

kg(lbs)

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

Liquid

Gas

W

D
H

W

D
H

REFRIGERANT PIPING

OUTDOOR UNIT

Indoor side
Outdoor side
Height difference
Piping length

INDOOR UNIT

Indoor, Outdoor D.B./W.B.°C

Fan

Fan

w1 Refrigerant piping length (one way) : 5m (16ft)
w2 Noise level is measured in an unacoustic room based on JIS conditions.
w3 Up to 20m it is unnecessary to charge additional refrigerant.
w4 Indoor, Outdoor D.B./W.B. : 29/19°C, 46/24°C
w5 Cooling SSA385, 386
w6 Inner thermostat, HP switch, LP switch, Thermal switch
w7 Thermal switch, Reversed-phase protector, HP switch, LP switch, Thermal relay.

6

2-2. POWER SUPPLY & MODEL NAMES

Power supply Service Ref. (Indoor unit)

Service Ref. (Outdoor unit)

50Hz

1ph.
3ph.
1ph.
3ph.

220,230,240V
380/220,400/230,415/240V
220V
220V

PK-2.5FAKL

PU-2.5VJA1.TH

—

PU-2.5NJA.TH

—

PK-3FAKL

PU-3VJC

1.TH

PU-3YJC.TH
PU-3NJA.TH

—

PK-4FAKL

PU-4VLJSA2.TH
PU-4YJSA1.TH

—

PU-4TJSA.TH

60Hz

Power supply (1 Phase) V : 220V 50Hz V : 230V 50Hz

Service Ref.

PK-2.5FAKL

0.44

0.095

0.7

PU-2.5

PK-3FAKL

0.44

0.095

0.7

PU-3

PK-4FAKL

0.53

0.114

0.8

PU-4

PK-2.5FAKL

0.44

0.095

0.8

PU-2.5

PK-3FAKL

0.44

0.095

0.8

PU-3

PK-4FAKL

0.53

0.114

0.8

PU-4

Current
Input
Starting current
Outdoor unit

A

kW

A

Power supply (1 Phase) V : 240V 50Hz N : 220V 60Hz

Service Ref.

PK-2.5FAKL

0.44

0.095

0.8

PU-2.5

PK-3FAKL

0.44

0.095

0.8

PU-3

PK-4FAKL

0.53

0.114

0.9

PU-4

PK-2.5FAKL

0.44

0.095

0.7

PU-2.5

PK-3FAKL

0.44

0.095

0.7

PU-3

PK-4FAKL

0.53

0.114

0.8

PU-4

Current
Input
Starting current
Outdoor unit

A

kW

A

Notes : 1. Power supply key N

……

1ph, 220V, 60Hz Y…3ph, 380/220, 400/230,

V(L) …1ph, 220, 230 240V, 50Hz 415/240V, 50Hz, 4 wires

……

T

3ph, 220V, 60Hz

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

2-3. ELECTRICAL SPECIFICATION

Rating conditions
Series PK Indoor Unit (Single Phase)

JIS B8615, 8616

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

7

DATA3

Service Ref.

Temperature

PK-2.5FAKL

T.C. C.F.

(T.I.)

PK-3FAKL

T.C. C.F.

(T.I.)

PK-4FAKL

T.C. C.F.

(T.I.)

Outdoor D.B.

21:
(69.8°F)

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

19.4: (67°F)
20: (68°F)
22: (71.6°F)

7.0

7.5

7.7

7.8

7.9

8.4

0.81

0.82

0.83

0.83

0.84

0.86

7.9

8.4

8.7

8.8

9.0

9.5

0.81

0.82

0.83

0.83

0.84

0.86

0.81

0.82

0.83

0.83

0.84

0.86

6.9

7.3

7.6

7.7

7.8

8.3

0.84

0.85

0.86

0.86

0.87

0.89

7.7

8.3

8.5

8.7

8.8

9.4

0.84

0.85

0.86

0.86

0.87

0.89

0.84

0.85

0.86

0.86

0.87

0.89

6.6

7.1

7.3

7.4

7.5

8.0

0.90

0.92

0.93

0.93

0.94

0.96

7.5

8.0

8.2

8.4

8.5

9.0

0.90

0.92

0.93

0.93

0.94

0.96

0.90

0.92

0.93

0.93

0.94

0.96

6.5

6.9

7.1

7.2

7.4

7.8

0.93

0.95

0.96

0.97

0.97

0.99

7.3

7.8

8.1

8.2

8.3

8.8

0.93

0.95

0.96

0.97

0.97

0.99

0.93

0.95

0.96

0.97

0.97

0.99

6.3

6.8

7.0

7.1

7.2

7.7

0.96

0.99

1.00

1.00

1.01

1.04

7.2

7.6

7.9

8.0

8.2

8.7

0.96

0.99

1.00

1.00

1.01

1.04

0.96

0.99

1.00

1.00

1.01

1.04

6.1

6.5

6.7

6.8

6.9

7.4

10.3

1.06

1.07

1.08

1.08

1.11

6.8

7.3

7.6

7.7

7.8

8.3

1.03

1.06

1.07

1.08

1.08

1.11

1.03

1.06

1.07

1.08

1.08

1.11

6.0

6.4

6.7

6.8

6.9

7.4

1.04

1.06

1.08

1.08

1.09

1.12

6.8

7.3

7.5

7.6

7.8

8.3

1.04

1.06

1.08

1.08

1.09

1.12

1.04

1.06

1.08

1.08

1.09

1.12

5.8

6.2

6.4

6.5

6.6

7.1

1.10

1.12

1.14

1.15

1.16

1.20

6.5

7.0

7.2

7.3

7.5

8.0

1.10

1.12

1.14

1.15

1.16

1.20

1.10

1.12

1.14

1.15

1.16

1.20

5.7

6.1

6.4

6.4

6.5

7.0

1.11

1.14

1.15

1.16

1.17

1.21

6.4

6.9

7.2

7.2

7.4

7.9

1.11

1.14

1.15

1.16

1.17

1.21

1.11

1.14

1.15

1.16

1.17

1.21

5.4

5.9

6.1

6.2

6.2

6.8

1.16

1.19

1.21

1.22

1.23

1.28

6.1

6.6

6.8

6.9

7.0

7.6

1.16

1.19

1.21

1.22

1.23

1.28

1.16

1.19

1.21

1.22

1.23

1.28

20

0.11

0.81

20

0.12

0.73

28

0.12

0.77

5.3

5.7

5.9

6.0

6.2

6.6

1.19

1.22

1.24

1.25

1.26

1.31

6.0

6.5

6.7

6.8

7.0

7.5

1.19

1.22

1.24

1.25

1.26

1.31

1.19

1.22

1.24

1.25

1.26

1.31

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

19.4: (67°F)
20: (68°F)
22: (71.6°F)
16: (60.8°F)
18: (64.4°F)
19: (66.2°F)

19.4: (67°F)
20: (68°F)
22: (71.6°F)
16: (60.8°F)
18: (64.4°F)
19: (66.2°F)

19.4: (67°F)
20: (68°F)
22: (71.6°F)
16: (60.8°F)
18: (64.4°F)
19: (66.2°F)

19.4: (67°F)
20: (68°F)
22: (71.6°F)
16: (60.8°F)
18: (64.4°F)
19: (66.2°F)

19.4: (67°F)
20: (68°F)
22: (71.6°F)
16: (60.8°F)
18: (64.4°F)
19: (66.2°F)

19.4: (67°F)
20: (68°F)
22: (71.6°F)
16: (60.8°F)
18: (64.4°F)
19: (66.2°F)

19.4: (67 °F)
20: (68°F)
22: (71.6°F)
16: (60.8°F)
18: (64.4°F)
19: (66.2°F)

19.4: (67 °F)
20: (68°F)
22: (71.6°F)
16: (60.8°F)
18: (64.4°F)
19: (66.2°F)

19.4: (67 °F)
20: (68°F)
22: (71.6°F)
16: (60.8°F)
18: (64.4°F)
19: (66.2°F)

19.4: (67 °F)
20: (68°F)
22: (71.6°F)

25:
(77°F)

30:
(86°F)

32.2:
(90°F)

35:
(95°F)

40:
(104°F)

40.6:
(105°F)

45:
(113°F)

46:
(115 °F)

50:
(69.8°F)

52:
(125.5°F)

Evaporator airflow (CMM)
Bypass factors
S.H.F . at rating conditions

Indoor W .B.

9.8

10.5

10.8

10.9

11.1

11.8

9.6

10.2

10.6

10.7

10.9

11.6

9.3

9.9

10.2

10.3

10.5

11.2

9.1

9.7

10.0

10.2

10.3

11.0

8.9

9.5

9.8

9.9

10.1

10.8

8.5

9.1

9.4

9.5

9.7

10.3

8.4

9.0

9.3

9.5

9.6

10.3

8.1

8.6

8.9

9.1

9.3

9.9

8.0

8.6

8.9

9.0

9.2

9.8

7.6

8.2

8.5

8.6

8.8

9.4

7.4

8.0

8.3

8.4

8.6

9.2

3-1. PERFORMANCE DATA

COOLING CAPACITY

50Hz

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

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

2. (°F)=32+9/5(°C)

3. Guaranteed operating 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).

8

VLJ... D.B. 46°C(115°F).

COOLING CAPACITY

8.0

8.6

8.8

8.9

9.1

9.6

7.8

8.4

8.6

8.7

8.9

9.5

7.6

8.1

8.3

8.4

8.6

9.1

7.4

7.9

8.2

8.3

8.4

9.0

7.3

7.7

8.0

8.1

8.3

8.8

6.9

7.4

7.7

7.8

7.9

8.4

6.9

7.4

7.6

7.7

7.9

8.4

6.6

7.1

7.3

7.4

7.6

8.1

6.5

7.0

7.2

7.3

7.5

8.0

6.2

6.7

6.9

7.0

7.2

7.7

6.1

6.5

6.8

6.9

7.0

7.5

11.0

11.8

12.1

12.3

12.5

13.2

10.8

11.5

11.9

12.0

12.2

13.0

10.4

11.1

11.4

11.6

11.8

12.6

10.2

10.9

11.3

11.4

11.6

12.4

10.0

10.6

11.0

11.1

11.4

12.1

9.5

10.2

10.5

10.7

10.9

11.6

9.5

10.1

10.5

10.6

10.8

11.6

9.1

9.7

10.0

10.2

10.4

11.1

9.0

9.6

9.9

10.1

10.3

11.0

8.6

9.2

9.5

9.7

9.9

10.6

8.4

9.0

9.3

9.5

9.7

10.4

Service Ref.

Temperature

Outdoor D.B.

21:
(69.8°F)

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

19.4: (67°F)
20: (68°F)
22: (71.6°F)

0.81

0.82

0.83

0.83

0.84

0.86

0.84

0.85

0.86

0.86

0.87

0.89

0.90

0.92

0.93

0.93

0.94

0.96

0.93

0.95

0.96

0.97

0.97

0.99

0.96

0.99

1.00

1.00

1.01

1.04

1.03

1.06

1.07

1.08

1.08

1.11

1.04

1.06

1.08

1.08

1.09

1.12

1.10

1.12

1.14

1.15

1.16

1.20

1.11

1.14

1.15

1.16

1.17

1.21

1.16

1.19

1.21

1.22

1.23

1.28

1.19

1.22

1.24

1.25

1.26

1.31

0.81

0.82

0.83

0.83

0.84

0.86

0.84

0.85

0.86

0.86

0.87

0.89

0.90

0.92

0.93

0.93

0.94

0.96

0.93

0.95

0.96

0.97

0.97

0.99

0.96

0.99

1.00

1.00

1.01

1.04

1.03

1.06

1.07

1.08

1.08

1.11

1.04

1.06

1.08

1.08

1.09

1.12

1.10

1.12

1.14

1.15

1.16

1.20

1.11

1.14

1.15

1.16

1.17

1.21

1.16

1.19

1.21

1.22

1.23

1.28

1.19

1.22

1.24

1.25

1.26

1.31

0.81

0.82

0.83

0.83

0.84

0.86

0.84

0.85

0.86

0.86

0.87

0.89

0.90

0.92

0.93

0.93

0.94

0.96

0.93

0.95

0.96

0.97

0.97

0.99

0.96

0.99

1.00

1.00

1.01

1.04

1.03

1.06

1.07

1.08

1.08

1.11

1.04

1.06

1.08

1.08

1.09

1.12

1.10

1.12

1.14

1.15

1.16

1.20

1.11

1.14

1.15

1.16

1.17

1.21

1.16

1.19

1.21

1.22

1.23

1.28

1.19

1.22

1.24

1.25

1.26

1.31

PK-2.5FAKL

T.C. C.F.

(T.I.)

7.2

7.6

7.9

8.0

8.1

8.6

PK-3FAKL

T.C. C.F.

(T.I.)

PK-4FAKL

T.C. C.F.

(T.I.)

7.0

7.5

7.7

7.8

8.0

8.5

6.8

7.2

7.4

7.6

7.7

8.2

6.6

7.0

7.3

7.4

7.5

8.0

6.5

6.9

7.2

7.3

7.4

7.9

6.2

6.6

6.8

7.0

7.1

7.6

6.1

6.6

6.8

6.9

7.0

7.5

5.9

6.3

6.5

6.6

6.7

7.2

5.8

6.2

6.5

6.6

6.7

7.2

5.6

6.0

6.2

6.3

6.4

6.9

5.4

5.9

6.0

6.2

6.3

6.8

Indoor W .B.

20

0.11

0.78

20

0.13

0.78

28

0.14

0.73

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

19.4: (67°F)
20: (68°F)
22: (71.6°F)
16: (60.8°F)
18: (64.4°F)
19: (66.2°F)

19.4: (67°F)
20: (68°F)
22: (71.6°F)
16: (60.8°F)
18: (64.4°F)
19: (66.2°F)

19.4: (67°F)
20: (68°F)
22: (71.6°F)
16: (60.8°F)
18: (64.4°F)
19: (66.2°F)

19.4: (67°F)
20: (68°F)
22: (71.6°F)
16: (60.8°F)
18: (64.4°F)
19: (66.2°F)

19.4: (67°F)
20: (68°F)
22: (71.6°F)
16: (60.8°F)
18: (64.4°F)
19: (66.2°F)

19.4: (67°F)
20: (68°F)
22: (71.6°F)
16: (60.8°F)
18: (64.4°F)
19: (66.2°F)

19.4: (67°F)
20: (68°F)
22: (71.6°F)
16: (60.8°F)
18: (64.4°F)
19: (66.2°F)

19.4: (67°F)
20: (68°F)
22: (71.6°F)
16: (60.8°F)
18: (64.4°F)
19: (66.2°F)

19.4: (67°F)
20: (68°F)
22: (71.6°F)
16: (60.8°F)
18: (64.4°F)
19: (66.2°F)

19.4: (67°F)
20: (68°F)
22: (71.6°F)

25:
(77°F)

30:
(86°F)

32.2:
(90°F)

35:
(95°F)

40:
(104°F)

40.6:
(105°F)

45:
(113 °F)

46:
(115 °F)

50:
(69.8°F)

52:
(125.5°F)

Evaporator airflow (CMM)
Bypass factors
S.H.F . at rating conditions

60Hz

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

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

2. (°F)=32+9/5(°C)

3. Guaranteed operating 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)…NJ, TJ

9

Service Ref.

Refrigerant piping length (one way)

5m (16ft)

1.0

1.0

1.0

10m (33ft)

0.983

0.978

0.984

15m (49ft)

0.972

0.962

0.974

20m (66ft)

0.961

0.948

0.964

25m (82ft)

0.951

0.934

0.954

30m (98ft)

0.940

0.921

0.944

35m (115ft)

—
—

0.914

40m (13ft)

—
—

0.902

PK-2.5FAKL
PK-3FAKL
PK-4FAKL

Refrigerant piping length (one way)

Service Ref.

5m (16ft)

1.0

1.0

1.0

10m (33ft)

0.978

0.971

0.980

15m (49ft)

0.963

0.950

0.966

20m (66ft)

0.948

0.931

0.952

25m (82ft)

0.934

0.913

0.939

30m (98ft)

0.921

0.896

0.926

35m (115ft)

—
—

0.941

40m (131ft)

—
—

0.902

PK-2.5FAKL
PK-3FAKL
PK-4FAKL

COOLING CAPACITY correction factors

50Hz

COOLING CAPACITY correction factors

60Hz

3-2. STANDARD OPERATION DATA

Service Ref.

MODE COOLING

Capacity

TotalElectrical CircuitRefrigerant circuit

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 temp.
Ref. pipe length

Intake air temperature
Discharge air temperature

Indoor side

Intake air temperature

side

Outdoor

D.B.

W.B.

D.B.
D.B.

W.B.

W

kw

Mpa

(O/F)

Mpa

(O/F)

:
:
:

m

:
:
:
:
:

Total Electrical circuit Refrigerant circuit Indoor side Outdoor side

The unit of pressure has been changed to Mpa on the international system of unit(SI unit system).
The converted score against the traditional unit system can be gotten according to the formula below.
1(Mpa)=10.2(

OO/FF

)

PK-2.5FAKL PK-3FAKL PK-4FAKL

7,000

2.56

PK-2.5FAKL

1,50

220

0.44

PU-2.5

1.TH

VJA

1,50

220

11.4

2.05

(20.9)

0.47

(4.79)

74.3
52

10.3

5
27
19

14.4
35
24

COOLING

6,650

3.54

1,60

220

0.44

PU-2.5
NJA.TH

1,60

220

15.8

2.13

(21.7)

0.44

(4.49)

87
54
10

5
29
19

14.1
46
24

COOLING

7,900

3.28

1,50

0.44

PU-3
VJC

1,50

15.1

1.99

(20.3)

0.47

(4.79)

13.0

PK-3FAKL

220

1.TH

220

86
51

6

5
27
19

35
24

COOLING

6,900

4.19

1,60

220

0.44

PU-3
NJA.TH

1,60

220

20.9

2.07

(21.1)

0.44

(4.49)

70
53

4

5
29
19

13.2
46
24

COOLING

9,800

3.46

PK-4FAKL

1,50

220

0.53

PU­4YJSA1.TH

3,50

380

5.7

1.80

(18.4)

0.48

(4.89)

65
49

6

5
27
19

13.9
35
24

COOLING

9,900

5.08

1,60

220

0.53

PU­4TJSA.TH

3,60

220

14.0

1.93

(19.7)

0.45

(4.59)

74
52

5

5
29
19

13.2
46
24

3-3. ADDITIONAL REFRIGERANT CHARGE (R-22…kg(lbs))

Service Ref.

PK-2.5FAKL
PK-3FAKL
PK-4FAKL

Outdoor unit precharged (kg)

V---2.4, N---2.4
V---2.8, Y---2.8, N---3.5
VL---3.8, Y---4.6, T---4.6

(up to 20m)

20m (66ft)

0
0
0

10

Refrigerant piping length (one way)

25m (82ft)

0.06(0.13)

0.06(0.13)

0.15(0.33)

30m (98ft)

0.12(0.26)

0.12(0.26)

0.30(0.66)

35m (115ft)

—
—

0.45(0.99)

40m (131ft)

0.6(1.32)

—
—

3-4. OUTLET AIR SPEED AND COVERAGE RANGE

Airflow
Air speed
Coverage range

w

Airflow
Air speed
Coverage range

w

m3/min

m/sec.

m(ft)

m

3

/min

m/sec.

m(ft)

60Hz 50Hz

Frequency

Configuration Wall mounted

Service Ref.

20

4.9

12.4(41)
20

4.9

12.4(41)

PK-2.5FAKL

20

4.9

12.4(41)
20

4.9

12.4(41)

PK-3FAKL

28

5.4

15.3(50)
28

5.4

15.3(50)

PK-4FAKL

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB(0dB=0.0002 µ bar)

BAND CENTER FREQUENCIES, Hz

PK-2.5FAKL
PK-3FAKL

High

Low

45

SPL(dB)39LINE

NOTCH

UNIT

WALL

1m

1m

MICROPHONE

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB(0dB=0.0002 µ bar)

BAND CENTER FREQUENCIES, Hz

PK-4FAKL

High

NOTCH

Low

46

SPL(dB)

41

LINE

w The air coverage range is the value up to the position where the air speed is 0.25m/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.

3-5. NOISE CRITERION CURVES

11

4

235

45

235

45

235

45

235

62.5

13

58

42

340

197

Top

Front

Right side

Left side

1400

1090

Air intake

235

C

Knock out hole for right piping
Refrigerant pipe. Drain pipe

Knock out hole for
left piping

Drain hose for
left-hand side piping

Drain hose

Lower side
Auto vane

(Gas pipe)

Drain hose

Bolt

Gas pipe

15

Terminal block for power supply

Terminal block for control

Terminal block for
wired remote controller

(Liquid pipe)

Liquid pipe 9.52(3/8F)
Gas pipe 15.88(5/8F)

Liquid pipe

A

30

32

39

98

37

74

439

100

30

37

74

4

2980

280

3030

18430

60

10

39

37

65

100

AB C

Knock out hole for piping

25

1110

183

240

B

1120

552

55
120

107
111

Air outlet

552

Air outlet

Change vane (manual)

Under panel
Removable at left-hand

side piping

Knock out hole for under-piping
Refrigerant pipe. Drain pipe

Rear piping opening

Range for left rear piping opening

12-ø6 hole for
tapping screw

66-ø6 hole for
tapping screw

Wall fixture

Unit center

32-ø12 hole for bolt

225

18

18

91

900

990

455

285

245

19

240 280 314

610

90

Drainage range
on left-hand side

Drainage range
on right-hand side

10 91=(910)

180

OUTLINES AND DIMENSIONS

PK-2.5FAKL
PK-3FAKL

Unit : mm

12

Terminal block for
wired remote controller

235

45

235

45

235

45

235

45

235

62.5

13

58

42

340

197

Top

Front

Right side

Left side

1680

1370

Air intake

235

C

Knock out hole for right piping

Knock out hole for left piping

Drain hose for left-hand side piping

Drain hose

Drain hose

Lower side

Auto vane

(Gas pipe)

Bolt

Gas pipe

15

Terminal block for power supply

Terminal block for control

(Liquid pipe)

Gas pipe 19.05(3/4F)
Liquid pipe 9.52(3/8F)

Liquid pipe

A

30

32

39

98

37

74

439

100

30

37

74

4

2980

280

3030

18430

60

10

39

37

65

100

AB C

Knock out hole for wiring

25

1110

183

240

B

1400

55
120

102
111

694

Air outlet

694

Air outlet

Change vane (manual)

Under panel

(Removable at left-hand side piping)

Knock out hole for under-piping
Refrigerant pipe. Drain pipe

Rear piping opening

Range for left rear piping openingRange for left rear piping opening

12-ø6 hole for tapping screw

84-ø6 hole for
tapping screw

Wall fixture

Unit out line

Unit center

41-ø12 hole for bolt

295 225

18

18

91

900

1270

595

285

245

19

240 280 314

750

90

Drainage range
on right-hand side

13 91=(1183)

180

Drainage range
on left-hand side

PK-4FAKL

Unit : mm

13

WIRELESS REMOTE CONTROLLER

159.3

55

58

19

Unit : mm

14

5

WIRING DIAGRAM

PK-2.5FAKL
PK-3FAKL
PK-4FAKL

SYMBOL NAME

P.B

INDOOR POWER BOARD

I.B

INDOOR CONTROLLER BOARD
FUSE FUSE (T6.3AL250V)
ZNR VARISTOR
CN2L CONNECTOR<LOSSNAY>
CN32 CONNECTOR<REMOTE SWITCH>
CN41 CONNECTOR<HA TERMINAL-A>
CN51 CONNECTOR<CENTRALLY CONTROL>
SW1 SWITCH <MODEL SELECTION>wSee Table 1.
SW2 SWITCH <CAPACITY CODE>wSee Table 2.
SW5 SWITCH<SYSTEM SELECTION>wSee Table 3.
SW6

SWITCH<EMERGENCY OPERATION>

SWE

CONNECTOR<EMERGENCY OPERATION>
X1 RELAY<DEW PREVENTION HEATER>
X4 RELAY<FAN MOTOR>
BCR

FAN CONTROL ELEMENT
LED1

POWER SUPPLY<I.B>
LED2

POWER SUPPLY<R.B>

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

Refer to tables 1, 2, 3.

BCR

ON
OFF

SWE

w

When installing optional

drain-up machine, disconnect
the CN31 jumper connector
and replace it with the
drain sensor (DS).

When installing drain-up
machine (Optional part).

WHT

(

)

D.SENSOR

CN31

1 2 1 23

DS

SYMBOL NAME

C CAPACITOR<FAN MOTOR>

FAN MOTOR

MF
MV

VANE MOTOR

TB2

TERMINAL BLOCK (POWER SUPPLY)

TB4

TERMINAL BLOCK<INDOOR/OUTDOOR
CONNECTING LINE>

TB5

TERMINAL BLOCK<REMOTE CONTROLLER
TRANSMISSION LINE >

TH1

ROOM TEMP.THERMISTOR
<0:/15k", 25:/5.4k" DETECT>

TH2

PIPE TEMP.THERMISTOR/LIQUID
<0:/15k", 25:/5.4k" DETECT>

MF

1 3 5

C

RED

WHT WHT

RED

1 3 1 31 3 1 3 1 3

5

(FAN)

X4 X1

SW5SW1 SW2

(

PUMP

CN27

<For PK-2.5, 3, 4FAKL-H models>

WHT
FAN

X4

RED

WHT

(D.SENSOR)

CN31

)

(

OPTION

(D.HEATER)

RED

(PUMP)

CN27

1 21 2 3

DP

XP

CNC

)

RED

GRN

(VANE)

CN6V

MV

XP

6

H2

X1

TB2

BLU

BLU

ON
OFF

WHT

(

WIRELESS

CN90

W.B

L
N

BLU

(D.U.M)

CNP

FUSE

ZNR

SW6
1 2

(INTAKE)

)

RU

RECEIVER

RED

RED

BLU

ORN

(POWER)

CND

CN41 CN2L

CN51 CN32

(

INDOOR/OUTDOOR

RED

COMUNICATION

WHT

CN20

(PIPE)

1 2

TH1 TH2

1 2 3

CN21

1 2 1 2

YLW

9

CNB

BZ

LED1 LED2 SW2 SW1

[Servicing]
Fasten terminal of the terminal board"TB4"equips lock system.
To remove the fastened terminal, pull it while pressing the protruding
portion (locking lever) of the terminal. The fastened terminal protruding
portion should face upward.

WHT

BOARD)

LED2

BLK

CN30

ORN

RED

(POWER

CNDK

WHT

(POWER

BOARD)

CN2D

)

BLU

(

REMOCON

CN22

BLU

I.B

LED1

BLU

R.B

WIRED REMOTE CONTROLLER BOARD
(OPTION)

TB6

TERMINAL BLOCK<REMOTE CONTROLLER
TRANSMISSION LINE >

W.B

WIRELESS REMOTE CONTROLLER BOARD
RECEIVING UNIT

RU
BZ

BUZZER

LED1

LED<RUN INDICATOR >

LED2

LED<HOT ADJUST>

SW1

SWITCH<HEATING ON/OFF>

SW2

SWITCH<COOLING ON/OFF

H2

DEW PREVENTION HEATER

DS

DRAIN SENSOR

DP

DRAIN-UP MACHINE

XP

RELAY (DRAIN-UP MACHINE)

P.B

CNSK

1 2

3

(RED)

DC13.1V

CN2S

1 2

(WHT)

BLK

1

WHT

2

)

TB5

1

TRANSMISSION WIRES DC12V

2

NAMESYMBOL

GRN/YLW

R.B
(OPTION)

TB6

TB2

TB4

L

N

1
2
3

12

POWER SUPPLY
~(1 PHASE)
220-240V 50Hz
220V 60Hz

TO OUTDOOR UNIT

Table 1

SW1

1 2 3 4 5

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 (1, 2, 3).

3. Symbols used in wiring diagram above are, : Connector, : Terminal (block).
[Self-diagnosis]

Please refer to technical manuals etc.
[Emergency operation procedure]

1.When the indoor unit microcomputer has failed, but all other components work properly, if you set the switch(SWE,SW6)on the
indoor control board, the indoor unit will begin Emergency Operation.

2.When you activate emergency operation of the cooling, you have to set the switch(SWE)and switch(SW6)on indoor controller.
SWE:ON · Indoor fan is running high speed. · Drain-up machine(Optional)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.

(2) Emergency operation becomes continuous only by switching the power source on / off. ON / OFF on the remote control or temperature
control etc. does not function.
(3) Emergency cooling should be limited to 10 hours maximum(The indoor unit heat exchanger may freeze).
(4) After emergency operation has been deactivated, set the switches etc. to their original positions.
(5) Movement of the vanes does not work in emergency operation, therefore you have to slowly set them manually to the appropriate
position.

ON
OFF

Table 2

PK-2.5FAKL

SW2MODELS

1 2 3 4 5

MODELS SW2

ON

PK-3FAKL

OFF

1 2 3 4 5

ON
OFF

MODELS

PK-4FAKL

SW2

1 2 3 4 5

ON
OFF

Table 3

SW5

1 2 3 4 5 6 7 8

ON
OFF

15

6

INDOOR UNIT
PK-2.5
PK-3
PK-4

OUTDOOR UNIT
PU-2.5/3J series
PU-4J series

Flexible tube

Flared
connection

Strainer

Flared
connection

PK-2.5

/ PK-3 Refrigerant pipe [15.88(5/8")

(with insulator) option
PK-4 Refrigerant pipe [19.05(3/4")
(with insulator) option

Refrigerant pipe [ 9.52(3/8")
(with insulator) option

Low pressure
switch

Charge
pIug

Check
pIug

High pressure
switch

Outdoor heat
exchanger

Muffler

Strainer

Capillary tube for
injection Only
PU-2.5V/ N
PU-3N
PU-4Y/ T

Capillary
tube

Compressor

Accumulator

Ball valve
(with service port)

flow of refrigerant

PU-2.5 [O.D.3.2 o I.D.1.6 o L760] o 2pcs
PU-3 [O.D.3.2 o I.D.1.8 o L800] o 2pcs
PU-4 [O.D.3.2 o I.D.2.0 o L840] o 2pcs

Capillary tube size

Ball
valve

strainer

Indoor heat
exchanger

Distributor
with
strainer

Pipe
temperature
thermistor
TH2

Indoor heat
exchanger

Distributor
with
strainer

Flexible tube

Flared
connection

Flared
connection

Refrigerant pipe [15.88(5/8")
(with insulator) option

Refrigerant pipe [ 9.52(3/8")
(with heat insulator) option

Ball
valve

Low pressure
switch

Charge
pIug

Check
pIug

High pressure
switch

Outdoor heat
exchanger

Capillary tube

Compressor

Accumulator

Ball valve
(with service port)

flow of refrigerant

[O.D.3.2 oI.D.1.8 oL800]
o2pcs

strainer

Pipe
temperature
thermistor
TH2

D.P.R.
(Discharge pressure regulator)

strainer

strainer

REFRIGERANT SYSTEM DIAGRAM

PK-3FAKL / PU-3VJC

1.TH, PU-3YJC.TH

Unit : mm(inch)

PK-2.5FAKL / PU-2.5VJA1.TH, PU-2.5NJA.TH
PK-3FAKL / PU-3NJA.TH
PK-4FAKL / PU-4VLJSA

2

.TH, PU-4YJSA1.TH, PU-4TJSA.TH

16

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.

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.

17

7-2. MALFUNCTION-DIAGNOSIS METHOD BY REMOTE CONTROLLER

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

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

<In case of trouble during operation>

When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform
unusual stop.

<Malfunction-diagnosis method at maintenance service>

■ 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.

18

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

•
Symptom

Wired remote controller

PLEASE WAIT

PLEASE WAIT → Error code

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

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.

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
LED2 (power for wired remote controller)

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

always lit.
Indicates whether power is supplied to the wired remote controller.

This LED lights only in the case of the main indoor unit.

Cause

19

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.

20

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 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 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 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) onthe 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

E0

or

E4

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

Remote controller transmission
error(E0)/signal receiving error(E4)

1 Abnormal if main or sub remote con-

troller can not receive normally any
transmission from indoor unit of refriger­ant address “0” for three minutes.
(Error code : E0)

2 Abnormal if sub remote controller could

not receive for any signal for two min­utes. (Error code: E0)

1 Abnormal if indoor controller board can

not receive normally any data from
remote controller board or from other
indoor controller board for three minutes.
(Error code: E4)

2 Indoor controller board cannot receive

any signal from remote controller for two
minutes. (Error code: E4)

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 Contact failure at transmission

wire of remote controller

2 All remote controllers are set

as “sub” remote controller. In
this case, E0 is displayed on
remote controller, and E4 is
displayed at LED (LED1, LED2)
on the outdoor controller circuit
board.

3 Mis-wiring of remote controller.
4 Defective transmitting receiving

circuit of remote controller

5 Defective transmitting receiving

circuit of indoor controller board
of refrigerant address “0”.

6 Noise has entered into the

transmission wire of remote
controller.

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.

1 Check disconnection or looseness of indoor

unit or transmission wire of remote controller.

2 Set one of the remote controllers “main”.

If there is no problem with the action above.

3 Check wiring of remote controller.

• Total wiring length: max.500m
(Do not use cable x 3 or more)

• The number of connecting indoor units:

max.16units

• The number of connecting remote con-

troller: max.2units

When it is not the above-mentioned problem of

1~3
4 Diagnose remote controllers.

a) When “RC OK” is displayed,

Remote controllers have no problem.
Put the power off, and on again to check.
If abnormality generates again, replace
indoor controller board.

b) When “RC NG” is displayed,

Replace remote controller.
c) When “RC E3” is displayed,
d) When “ERC 00-06” is displayed,
[ c),d)→Noise may be causing abnormality. ]

∗ If the unit is not normal after replacing

indoor controller board in group control,
indoor controller board of address “0”
may be abnormal.

21

Error Code

E3

or

E5

Fb

E1

or

E2

PA
(2502)
(2500)

Meaning of error code and detection method

Remote controller transmission
error(E3)/signal receiving error(E5)

1 Abnormal if remote controller could not

find blank of transmission path for six
seconds and could not transmit.

(Error code: E3)

2 Remote controller receives transmitted

data at the same time, compares the
data, and when detecting it, judges
different data to be abnormal 30
continuous times. (Error code: E3)

1 Abnormal if indoor controller board could

not find blank of transmission path.

(Error code: E5)

2 Indoor controller board receives trans-

mitted data at the same time, compares
the data,and when detecting it, judges
different data to be abnormal 30
continuous times. (Error code: E5)

Abnormality of indoor controller board

Abnormal if data cannot be normally read
from the nonvolatile memory of the indoor
controller board.

Abnormality of remote controller con­trol board

1 Abnormal if data cannot be normally

read from the nonvolatile memory of the
remote controller control board.

(Error code: E1)

2 Abnormal if the clock function of remote

controller cannot be normally operated.

(Error code: E2)

Forced compressor stop
(due to water leakage abnormality)

1 When the intake temperature subtracted

with liquid pipe temperature is less than

-10:, drain sensor is detected whether
it is soaked in the water or not at the interval
of 90 seconds. (Drain pump will start operating

when the drain sensor is detected to be

soaked in the water.)

2 The unit has a water leakage abnormality

when the following conditions, a and b, are

satisfied while the above-mentioned detection

is performed.
a) The drain sensor is detected to be

soaked in the water 10 times in a row.

b) The intake temperature subtracted with

liquid pipe temperature is detected to be
less than -10: for a total of 30 minutes.
(When the drain sensor is detected to

be NOT soaked in the water, the detection
record of a and b will be cleared.)

3 The drain sensor detection is performed

in operations other than cooling. (When
the unit stops operating, during heating
or fan operation, when the unit stops
because of some abnormality)

*Once the water leakage abnormality is

detected, abnormality state will not be
released until the main power is reset.

1 Two remote controller are set

2 Remote controller is connected
3 Repetition of refrigerant
4 Defective transmitting receiving
5 Defective transmitting receiving

6 Noise has entered into trans-

1 Defective indoor controller

1 Defective remote controller. 1 Replace remote controller.

1 Drain pump trouble
2 Drain defective

3 Open circuit of drain sensor

4 Contact failure of drain sensor

5 Dew condensation on drain

6 Extension piping connection

7 Mis-wiring of indoor/ outdoor

8 Room temperature thermistor /

Cause

as “main.”
(In case of 2 remote con-

trollers)
with two indoor units or more.
address.
circuit of remote controller.
circuit of indoor controller

board.
mission wire of remote con-

troller.

board.

· Drain pump clogging

· Drain pipe clogging

side heater

connector

sensor

· Drain water descends along

lead wire.

· Drain water waving due to filter

clogging.

difference at twin, triple,

quadruple system.

connecting at twin, triple,

quadruple system.

liquid pipe temperature thermis-

tor detection is defective.

Countermeasure

1 Set a remote controller to main, and the

other to sub.

2 Remote controller is connected with only one

indoor unit.

3 The address changes to a separate setting.
4~6 Diagnose remote controller.

a) When “RC OK”is displayed, remote con-

trollers have no problem.
Put the power off,and on again to check.
When becoming abnormal again, replace

indoor controller board.

b)When “RC NG”is displayed, replace

remote controller.

c)When “RC E3”or “ERC 00-66”is displayed,

noise may be causing abnormality.

1 Replace indoor controller board.

Check the drain pump.
Performance
Please confirm whether water can be drained.

Confirm the resistance of the drain sensor side

heater.

Check the connector contact failure.

1 Check the drain sensor leadwire mounted.
2 Check the filter clogging

Check the piping connection.

Check the indoor/ outdoor connecting wires.

Check the room temperature display of remote
controller.
Check the indoor liquid pipe temperature dis-

play of outdoor controller board.

22

7-4. TROUBLESHOOTING BY INFERIOR PHENOMENA

Phenomena

(1)LED2 on indoor controller board

is off.

• When LED1 on indoor controller board is also off.

1 Power supply of 220~240V AC is not supplied to

indoor unit.

2 Defective indoor controller board.

3 Defective indoor power board.

Cause

Countermeasure

1 Check the voltage of indoor power supply

terminal block (L,N).

• When AC220~240V is not detected.
Check the power supply wiring.

• When AC220~240V is detected.

-Check 2 (below).

2 Check voltage output from CNDK on

indoor controller board.

• When AC220~240V is not detected.
Check the fuse on indoor controller
board.
Check the wiring connection between
indoor power supply terminal block and
CND on indoor controller board.

• When AC220~240V is detected.

-Check 3 (below).

3 Check voltage output from CN2S on

indoor power board.

• When no voltage output.
Check the wiring connection between
CNDK on indoor controller board and
CNSK on indoor power board.
If no problem are found,indoor power
board is defective.

• When DC12.5~13.7V is detected.
Check the wiring connection between
CN2S on indoor power board and
CN2D on indoor power board.
If no problem are found,indoor con­troller board is defective.

(2)LED2 on indoor controller board

is blinking.

• When LED1 on indoor controller board is lit.

1 Mis-setting of main/sub for indoor unit

(There is no unit corresponding to main unit.)

• When LED1 on indoor controller board is also blinking.
Connection failure of indoor/outdoor unit connecting
wire

• When LED1 is lit.

1 Mis-wiring of remote controller wires

When 2 indoor units are wired in one refrigerant
system, each indoor unit sets main unit. (SW5-3)

2 Short-cut of indoor/outdoor unit connecting wire.

3 Short-cut of remote controller wires
4 Defective remote controller

1 Reconfirm the setting of main/sub for

indoor unit
Set the main unit.
Set main/sub using SW5-3 on indoor
controller board.

Check indoor/outdoor unit connecting wire
for connection failure.

1 Check the connection of remote con-

troller wires in case of twin triple indoor
unit system. When 2 or more indoor units
are wired in one refrigerant system,
connect remote controller wires to one of
those units.

2 Remove indoor/outdoor connecting wires

and check LED2 on indoor controller
board.

• When LED2 is blinking, check the short­cut of indoor/outdoor connecting wires.

• When LED2 is lit, connect indoor/outdoor
connecting wires again, and; if LED2 is
blinking, outdoor unit’s controller board is
defective; if LED2 is lit, connection failure
of indoor/outdoor terminal block etc. has
returned to normal.

34 Remove remote controller wires and

check LED2 on indoor controller board.

• When LED2 is blinking, check the

short-cut of remote controller wires.

• When LED2 is lit, connect remote

controller wires again and:
if LED2 is blinking, remote controller
is defective; if LED2 is lit, connection
failure of remote controller terminal
block etc. has returned to normal.

23

1 Turn on the power to the unit at least 12 hours before the test run.
2 Press the button twice continuously.

(Start this operation from the status of remote controller display turned off.)
A and current operation mode are displayed.

TEST RUN

TEST RUN

3 Press the button to activate mode, then check whether
cool air is blown out from the unit.

MODE

COOL

4 Press the button and check whether fan speed changes.

FAN

5 Press the button and check whether the auto vane operates properly.

VANE

6 Press the ON/OFF button to stop the test run.

Note:

•

Point the remote controller towards the indoor unit receiver while following steps 2 to 6.

• It is not possible to run the in FAN or DRY mode.

Phenomena

• After completing installation and the wiring and piping of the indoor and outdoor units, check for refrigerant leakage,
looseness in the power supply or control wiring, wrong polarity, and no disconnection of one phase in the supply.

• Use a 500-volt megohmmeter to check that the resistance between the power supply terminals and ground is at least 1.0M".

• Do not carry out this test on the control wiring (low voltage circuit) terminals.

Warning:
Do not use the air conditioner if the insulation resistance is less than 1.0M".

(3)Upward/downward vane

performance failure

1 The vane is not downward during defrosting and

heat preparation and when the thermostat is OFF in
HEAT mode. (Working of COOL protection function)

Cause

2 Vane motor does not rotate.

• Defective vane motor

• Breaking of wire or connection failure of connector

• Up/down vane setting is “No vanes”.

3 Upward/downward vane does not work.

• The vane is set to fixed position.

(4)Receiver for wireless remote

controller

1 Weak batteries of wireless remote controller.
2 Contact failure of connector (CNB) on wireless

remote controller board.

(Insert failure)

3 Contact failure of connector (CN90) on indoor con-

troller board.(Insert failure)

4 Contact failure of connector between wireless

remote controller board and indoor controller board.

7-5. TEST RUN AND EMERGENCY OPERATION

7-5-1. Before test run

Countermeasure

1 Normal operation (The vane is set to hor-

izontal regardless of remote control.)

2 Check 2 (left).

• Check the vane motor. (Refer to “How
to check the parts”.)

• Check for breaking of wire or connec­tion failure of connector.

• Check “Up/down vane setting”. (Unit
function selection by remote controller).

3 Normal operation (Each connector on

vane motor side is disconnected.)

1 Replace batteries of wireless remote con-

troller.

2~4

Check contact failure of each connector.
If no problems are found of connector,
replace indoor controller board.
When the same trouble occurs even if
indoor controller board is replaced,
replace wireless remote controller
board.

7-5-2. Test run (Using wireless remote controller)

A

TEST RUN

ON/OFF TEMP

6

FAN

AUTO STOP

3

2

CHECK

TEST RUN

LOUVER

RESETSET CLOCK

VANE

MODE

4

AUTO START

5

h

min

24

7-5-3. When wireless remote controller troubles or its battery is exhausted

Receiver

Operation lamp

Emergency operation switch (cooling)

Mode

Cooling

Set temperature

Fan speed

Airflow direction

24:
High

Horizontal (30deg)

wEmergency operation will be performed as follows.

1.When the indoor unit microcomputer has failed, but all other components work properly, if you set the switch(SWE,SW6)on the
indoor control board, the indoor unit will begin Emergency Operation.

2.When you activate emergency operation of the cooling, you have to set the switch(SWE)and switch(SW6)on indoor controller.
SWE:ON · Indoor fan is running high speed. · Drain-up machine(Optional)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.
(2)

Emergency operation becomes continuous only by switching the power source on / off. ON / OFF on the remote control or

temperaturecontrol etc. does not function.

(3)

Emergency cooling should be limited to 10 hours maximum(The indoor unit heat exchanger may freeze).

(4)

After emergency operation has been deactivated, set the switches etc. to their original positions.

(5) Movement of the vanes does not work in emergency operation, therefore you have to slowly set them manually to the appropriate

position.

1. Emergency operation is available in such a case using emergency operation switch equipped next to the receiver of indoor
unit.

2. To start operation

• Cooling Operation·······Press (Cooling) switch.

wWhen the unit starts operating, the operation lamp is lit.

3. To stop operation

• Press either emergency operation switch.

7-5-4. When wired remote controller or indoor unit micro computer troubles

25

7-6. HOW TO CHECK THE PARTS

0

10

20

30

40

50

-20 -10 0 10 20 30 40 50

< Thermistor for lower temperature >

Temperature (:)

Resistance (K")

Room temperature
thermistor (TH1)
Pipe temperature
thermistor (TH2)

Fan motor (MF)

Disconnect the connector, then measure the resistance using a tester.
(Surrounding temperature 10°C~30°C)

Measure the resistance between the terminals using a tester.

Normal

4.3k"~9.6k"

Abnormal

Open or short

Motor terminal

or

Relay connector

Normal

PK-

2.5, 3FAKL

Abnormal

Red-White

99.5"i10%
Open or short

White-Black

103.5"i10%

Protector
OFF : 130i5˚C
ON : 80i20˚C

Parts name Check points

4

FAKL

62.6"i10%

74.0"i10%

Vane motor (MV)

Measure the resistance between the terminals using a tester.
(Surrounding temperature 20°C~30°C)

Normal

186~214"

Abnormal

Open or short

3 6 1

4
5
2

M

Pink

Connector

Red

Orange

Blue

Brown

Yellow

Brown-Yellow

Brown-Blue

Red-Orange

Red-Pink

PK-2.5FAKL PK-3FAKL PK-4FAKL

Relay connector

1

Red

1

White

2

3

Black

3
5

<Thermistor Characteristic graph>

Thermistor for
lower temperature

Room temperature thermistor(TH1)
Pipe temperature thermistor(TH2)

Thermistor R0=15k' ±3%
Fixed number of B=3480 ± 2%

Rt=15exp { 3480( ) }

1

273+t

1

273

0: 15k'
10: 9.6k'
20: 6.3k'
25: 5.4k'
30: 4.3k'
40: 3.0k'

26

7-7. TEST POINT DIAGRAM

7-7-1. Indoor power board
PK-2.5FAKL
PK-3FAKL
PK-4FAKL

CN2S
Connect to the indoor controller board (CN2D)

11

Between

33

to

12.6-13.7V DC (Pin11(+))

CNSK
Connect to the indoor controller board
(CNDK)
Between

11

to 33220-240V AC

27

7-7-2. Indoor controller board
PK-2.5FAKL
PK-3FAKL
PK-4FAKL

CNDK
Connect to the indoor
power board (CNSK)
(220~240V AC)

FUSE
(6.3 A 250 V)

CND
Power supply input
(220~240V AC)

CNP
Drew prevention
heater (H2)
(220-240V AC)

CN2D
Connect to the indoor

power board (CN2S)

(12.5~13.7V DC)

LED1
Power supply (I.B)

LED2
Power supply (R.B)

SW6
Emergency
operation

CN22
Connect to the terminal
block(TB5)
(Remote controller connecting
wire)
(10.4~14.6V DC)

CN30
Transmission
(Indoor/outdoor)

CN20
Room temperature
thermistor (TH1)

CN21
Pipe temperature
thermistor/Liquid (TH2)

CN31
Drain sensor (DS)

CN90
Connect to the wireless
remote controller board
(CNB)

CN6V
Vane motor output
(MV)

CN41
Connector (HA terminal-A)

CN51
Centrally control

SWE
Emergency operation

FAN
Fan motor output

Jumper wire J41, J42
Pair number setting with

wireless remote controller

28

SW2
Capacity setting

CN105/92
(RED)

CN24
Heater output
(12V DC)

CN27
Drain pump output(DP)
(12V DC)

CN32
Remote switch

CN2L
Connector
(LOSSNAY)

SW5
System setting

SW1
Model setting

7-8. FUNCTIONS OF DIP SWITCH AND JUMPER WIRE

SW1

Setting by the dip switch and jumper wire

Functions

Jumper wire

Model
settings

SW5

System
settings

Capacity
settings

Pair number
setting with
wireless
remote
controller

Remarks

SW2

J41
J42

0
1
2

3 ~ 9

Wireless remote

controller setting

Control PCB setting

J41 J42

<Settings at time of factory shipment>
Wireless remote controller: 0
Control PCB: (for both J41 and J42)
Four pair number settings are supported.
The pair number settings of the wireless remote
controller and indoor control PCB (J41/J42) are
given in the table on the left.
(' ' in the table indicates the jumper line is disco­nnected.)

(Marks in the table below) Jumper wire ( : Short : Open)

SW5-3 Main/Sub setting
OFF : Main ON : Sub
SW5-4 Rotaion operation setting
OFF : Not avairable ON : avairable

SW1

ON

OFF

1 2 3 4 5

SW5

ON
OFF

1 2 3 4 5 6 7 8

SW2MODELS

PK-2.5FAKL

PK-3FAKL

1 2 3 4 5

ON
OFF

1 2 3 4 5

ON
OFF

PK-4FAKL

1 2 3 4 5

ON
OFF

Each function is controlled by the dip switch and the jumper wire on control p.c. board.

29

8 FUNCTION SETTING

Function

Settings

Mode No.

Setting No.

Initial setting

(when sent from the factory)

Remarks

Power failure
automatic recovery
Indoor temperature
detecting

LOSSNAY
connectivity

Power supply
voltage
Frost prevention
temperature
Humidifier control

Rotation

OFF
ON
Indoor unit's (Main) internal sensor

Remote controller's internal sensor w1
Not supported
Supported (indoor unit not equipped with outdoor air intake)
Supported (indoor unit equipped with outdoor air intake)
240V
220V,230V
1: (Normal)

-3:
When the compressor operates, the humidifier also operates.
When the fan operates, the humidifier also operates.
24h cycle
168h cycle
Back up function

1
2
1
2
3
1
2
3
1
2
1
2
1
2
1
2
3

01

02

03

04
15
16

20

The setting is
applied to all
the units in the
same
refrigerant
system.

Function Settings

No.

Mode

No.

Setting

Initial setting (Factory setting

)

- : Not available

4-Way cassette

Ceiling

concealed

Ceiling

suspended

Wall

mounted

Floor

standing

PL-AAK

PE-EAK

PC-GAK

PK-GAKL

PS-GAK

PK-FAKL

Filter sign 100Hr 1

2500Hr 07 2

No filter sign indicator

3
Air flow Quiet Standard 1 - - ­(

Fan speed

)

Standard

High ceiling1

08 2 - - -

High ceiling

High ceiling2

3--­No.of air outlets 4 directions 1 - - - -

3 directions 09 2 - - - ­2 directions

3----­Optional high efficiency

Not supported

10

1

---

filter Supported

2

---

Vane setting

No vanes (Vane No.3 setting:PL-AAKonly

)

1---

Vane No.1 setting

11 2 - - -

Vane No.2 setting

3--­Energy saving air Disabled

12

1

---

flow (Heating mode

)

Enabled

2

---

Optional humidifier Not supported

13

1

--- -

(

PLH-AAK(H) only

)

Supported

2

--- -

Vane differential setting No.1 setting (TH2: 24-28:

)

1- ­in heating mode No.2 setting (Standard, TH2: 28-32:

)

14 2 - -

(

cold wind prevention

)

No.3 setting (TH2: 32-38:

)

3- ­Swing Not available

23

1

--

Available

2

--

Quiet operation mode Disabled (Standard

)

26

1

--- -

of PL-AAK(Fan speed

)

Enabled (Quiet operation mode

)

2

--- -

Fan speed when the

Set fan speed

27

1
cooling thermostat is OFF Stop

2
Detection of abnormality of Available

28

1
the pipe temperature (P8)Not available

2

}

PL-AAK

PL-KAK

-

-

-

-

8-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER

Each function can be set according to necessity using the remote controller. The setting of function for each unit can only be
done by the remote controller. Select function available from the table 1.
(1) Functions available when setting the unit number to 00 (Select 00 referring to 4 setting the indoor unit number.)

W1 The functions below are available only when the wired remote controller is used.The functions are not available for floor

standing models.

<Table 1> Function selections

(2) Functions available when setting the unit number to 01-03 or AL (07 in case of wireless remote controller)

• When setting functions for an indoor unit in an independent system, set the unit number to 01 referring to 4 setting the
indoor unit number.

• When setting functions for a simultaneous- Twin indoor unit system, set the unit number to 01 to 02 for each indoor

unit in case of selecting different functions for each unit referring to 4 setting the indoor unit number.

• When setting the same functions for an entire simultaneous Twin indoor unit system, set refrigerant address to AL

(07 in case of wireless remote controller) referring to 4 setting the indoor unit number.

30

Rotation setting (Function setting mode No.20

)

Function setting

Features Indoor controller board

Mode No.

This system can correspond only by the pattern of two refrigerant group by 1 : 1
(indoor and outdoor unit combination) systems.

Setting No.

SW5-3 setting SW5-4 setting

20

01

(

24hours cycle

)

02

ON

OFF : Main
ON : Sub

(

168hours cycle

)

03

(

Back up

function

)

When abnormality occurs while
operating, it changes as a back up unit

,

and operating continues.

Each system operates alternately for
24hours.

Each system operates alternately for
168hours.

Example of unit's operation

(Setting No. = 01 or 02)

Main Unit is abnormal

Operation starts Main➝Sub Sub➝Main

(Setting No. = 02

• • •

168hours cycle)

Outdoor
unit

(Setting No. = 03)

Main Unit is abnormal

Indoor

Operation starts Main➝Sub

unit

Remote
Controller

Main➝Sub

ON

OFF

OFF

Main

ON

OFF

ON

ON

OFF

indoor
unit

Sub
indoor
unit

24h 24h

Main
indoor
unit

Sub
indoor
unit

Main

Sub

31

ON/OFF

TEMP

FAN

VANE

MODE

CHECK

LOUVER

TEST RUN

AUTO STOP

AUTO START

h

min

CHECK

RESET

SET

CLOCK

h

CHECK

min

h

The flow of the function selection procedure is shown below. This example shows how to turn
off the function that raises the set temperature by 4 degrees during HEAT operation .
The procedure is given after the flow chart.

1 Check the function selection setting.
2 Switch to function selection mode.

(Enter address "50" in troubleshooting
mode, then press the HOUR button.)

Troubleshooting mode is the mode entered when
you press the INSPECT button twice to display
"INSPECT".

3 Specify unit No. "01" (since the function applies to unit 01).

(Set address "01" while still in troubleshooting mode, then press the MINUTE button.)

Note: You can't specify the refrigerant address.

4

Select mode No. "24" (function that raises set temperature by 4 degrees during HEAT operation).

(Set address "24" while still in troubleshooting mode, then press the HOUR button.)

6

Finished

8 End function selection mode.

(End troubleshooting mode.)

YES

NO

Note: When you switch to function selection mode

on the wireless remote controller's operation
area, the unit ends function selection mode
automatically if nothing is input for 10 minutes
or longer.

5 Select setting No. "02" (OFF).

(Set address "02" while still in troubleshooting mode, then press the HOUR button.)

Change
unit No.

YES

NO

7

Selecting functions using the wireless remote controller (Type C)

h

min

Functions can be selected with the wireless remote controller. Function selection using wireless remote controller is available only for refriger­ant system with wireless function. Address cannot be specified by the wireless remote controller.

[Flow of function selection procedure]

[Operating instructions]

1 Check the function settings.
2 Press the button twice continuously. → CHECK is lit and “00” blinks.

Press the temp button once to set “50”. Direct the wireless remote controller toward the receiver of the indoor unit and press
the button.

3 Set the unit number.

Press the temp button to set the unit number. (Press “01” to specify the indoor unit whose unit number is 01.)
Direct the wireless remote controller toward the receiver of the indoor unit and press the button.

By setting unit number with the button, specified indoor unit starts performing fan operation.
Detect which unit is assigned to which number using this function. If unit number is set to AL, all the indoor units in same
refrigerant system start performing fan operation simultaneously.

* If a unit number that cannot be recognized by the unit is entered, 3 beeps of 0.4 seconds will be heard. Reenter the unit number

setting.

* If the signal was not received by the sensor, you will not hear a beep or a “double beep” may be heard. Reenter the unit number

setting.

4 Select a mode.

Press the temp button to set a mode. Press “24” to turn on the function that raises the set temperature by 4 degree
during heat operation. Direct the wireless remote controller toward the sensor of the indoor unit and press the button.
→ The sensor-operation indicator will flash and beeps will be heard to indicate the current setting number.
Current setting number: 1 = 1 beep (one second)

2 = 2 beeps (one second each)

* If a mode number that cannot be recognized by the unit is entered, 3 beeps of 0.4 seconds will be heard. Reenter the mode

number.

* If the signal was not received by the sensor, you will not hear a beep or a “double beep” may be heard. Reenter the mode

number.

5 Select the setting number.

Press the temp button to select the setting number. (02: Not available)
Direct the wireless remote controller toward the receiver of the indoor unit and press the button.
→ The sensor-operation indicator will flash and beeps will be heard to indicate the the setting number.

Setting number: 1 = 2 beeps (0.4 seconds each)

* If a setting number that cannot be recognized by the unit is entered, the setting will turn back to the original setting.

6 Repeat steps 4 and 5 to make an additional setting without changing unit number.
7 Repeat steps 3 to 5 to change unit number and make function settings on it.
8 Complete the function settings

* Do not use the wireless remote controller for 30 seconds after completing the function setting.

* If the signal was not received by the sensor, you will not hear a beep or a “double beep” may be heard. Reenter the setting number.

Press button.

3 = 3 beeps (one second each)

2 = 2 beeps (0.4 seconds each, repeated twice)
3 = 2 beeps (0.4 seconds each, repeated three times)

32

SYSTEM CONTROL9

System Name System Diagram Features

Parts Required in Addition to Standard System

Components (Indoor/Outdoor Units, Remote Controller)

A.Remote control-

ler operation
(Standard)

B.Remote control-

ler operation

Use of two con­trollers enables
operation of the air
conditioner both
from a distance
and nearby.

C.Group control

operation

Use of one remote
controller to con­trol multiple air
conditioners with
the same settings
simultaneously.

D.Remote/local

combined control
operation

Allows start/stop
of the air condi­tioner from a dis­tance, and prohib­its/permits start/
stop from remote
controllers.

E.Operation by

external signal

F.

Control and remote
display by external
signal (extraction
of monitor signal)

Enables you to
display the op­eration state and
control start/stop
from a distance.

• There are two types of remote controllers: wired type
and wireless type.

• Simultaneous twin indoor units are started or stopped
simultaneously.

• Up to two remote controllers can be connected to
one group.

• Simultaneous twin units are counted as each unit.

• Operation control by the latest command (last en­tered priority)

• Wired and wireless remote controllers can be com­bined as a pair.

• One group can consist of up to 16 indoor units, and
they can be started sequentially by connecting the
remote controller to them and assigning an address
to each inter face.

• Simultaneous twin units are counted as one unit.

• All the units belonging to the same group are oper­ated in the same mode, but thermostats can be
turned ON/OFF individually for each indoor unit.

• Up to two remote controllers can be connected.

• All the air conditioners can be turned ON/OFF collectively
from a distance.

• Operation can be switched between the remote operat­ing panel and local controller.

• Operations (e.g., temperature adjustment, airflow, air­flow direction) except for start/stop operations can be
performed even if the remote controller is being oper­ated.

• In the case of simultaneous twin units connect the

controller to one indoor unit only. If connected to two
indoor units, an error (operation stop) may occur.

• Control by an external timer is possible by connecting it.

• Use of optional "remote ON/OFF adapter" enables
remote control via relay. (Level signal)

Extraction of non-voltage contact output

Extraction of DC12 V contact output

* One of the wired remote con-

trollers must be set as a sub
remote controller.

Wired remote controller (addi­tional)
(PAR-21MAA)

Inter face MAC-397IF-E

Remote ON/OFF adapter
(PAC-SE55RA-E)
Relay box
(Part to be provided at your site)
Remote operating panel
(Part to be provided at your site)

Remote ON/OFF adapter
(PAC–SE55RA-E)

Remote operation adapter
(PAC-SF40RM-E)
Remote display panel
(Part to be provided at your site)

Remote display adapter
(PAC-SA88HA)
Remote display panel
(Part to be provided at your site)

• Use of optional "remote operation adapter" and
"remote display panel" (Part to be provided at your site)
provides non-voltage contact outputs of signals
(operation, error) and operation/stop input function.

• Use of optional "remote display adapter" and "re­mote display panel" (Part to be provided at your site)
provides DC12 V contact outputs of signals
(operation, error) and operation/stop input function.

9-1. VARIETY OF SYSTEM CONTROL FUNCTIONS

Indoor unit

Outdoor
unit

Remote
Controller

Relay box

Indoor unit

Remote Controller

Remote operating panel

Remote
Controller

Indoor
unit

Remote
Controller

Inter face
Indoor

unit
Outdoor
unit

Remote

display kit

Indoor unit

Remote Controller

Remote display (operation, error)

33

Outdoor
unit

Indoor
unit

Sub

Main

Remote
Controller

System Name System Diagram Features

Parts Required in Addition to Standard System

Components (Indoor/Outdoor Units, Remote Controller)

G. Timer operation

Enables control
of start and stop.

* For control by

external timer,
refer to Remote/
handheld com­bined control op­eration".

H.Interlock opera-

tion with periph-

eral equipment

Enables control of
Mitsubishi Lossnay
ventilator by remote
controller.

I.Rotation

• Weekly timer:
In addition to ON/OFF, up to eight temperature
patterns can be set for each day of the week.

* Only one timer can be selected; the auto off, simple

and weekly timers cannot be combined.

• Simple timer: Start and stop operations can each be

performed once within 72 hours (can
be set in 1-hour increments).

• Auto off timer:Operation is stopped when the preset

time elapses following the start of
operation.
The time can be set from 30 minutes
to 4 hours in 30-minute increments.

* Only one timer can be selected; the simple and auto

off timers cannot be combined.

• Connecting a Lossnay ventilator and an indoor unit
enables control of interlock/solo ventilation opera­tion and airflow.
(Only the microcomputer type Lossnay ventilator
can be used.)

•

•

MA Remote controller
(PAR-21MAA)

When abnormality occurs while operating, it changes
into operating the back up unit, and operating is
continued.
(Unit function Mode No. 20 setting No.3 , Indoor
controller board SW-5-4 ON)
Main / Sub setting
Main : Indoor controller board
SW5-3 : OFF
Sub : Indoor controller board
SW5-3 : ON
Each system operates alternately for 24 hours or 168
hours.
(Unit function Mode No. 20 setting No.1: 24 hours/
No.2 : 168 hours, Indoor controller board SW 5-4 ON)
Main / Sub setting
Main : Indoor controller board
SW5-3 : OFF
Sub : Indoor controller board
SW5-3 : ON

This system can correspond only by
the pattern of two refrigerant group
by 1 : 1 (indoor and outdoor unit
combination) systems.

Lossnay
ventilator

Indoor unit

Remote
Controller

34

9-2. ONE REMOTE CONTROLLER (STANDARD) OPERATION

Slim Air Conditioners System

Remote controller
connection circuit
(Controller cable)

Outdoor unit
OC

Indoor unit
IC

Wired
remote
controller R

Indoor/Outdoor
connection
cable

Remote
controller
cable

OC

IC-1

R

IC-2

2

2

OC

IC-1

R

2

2

Standard 1:1 Simultaneous Twin Indoor controller board switch setting

SW5-3

OFF

ON

Indoor unit IC

IC-1 (Main)

IC-2 (Sub)

OC IC

1
2

LN

Power source wiring

1
2

1
2

1
2

R

(No polarity)

Outdoor unit Indoor unit Remote controller

Power
source
wiring

(Polarity)

Slim Air Conditioners System

Remote controller
optical receiver
section connection
circuit

Outdoor unit
OC

Indoor unit
IC

Wireless
remote controller
receiver section R'

Indoor/Outdoor
connection
cable

Wireless remote
controller cable

Wireless
remote
controller
cable

Remote
controller
cable

OC

IC-1

R'

IC-2

2

2

9

OC

IC-1

R'

2

9

Standard 1:1 Simultaneous Twin Indoor controller board switch setting

SW5-3

OFF

ON

Indoor unit IC

IC-1 (Main)

IC-2 (Sub)

CN90

Controller board

Indoor unit IC

9

CNB

12

Wireless remote controller

optical receiver section R’

Remote controller
cable terminal block

(1) One Wired Remote Controller

(OC: Outdoor unit IC: Indoor unit R: Remote controller (for wireless type: optical receiver adapter)

(Reference)

11

If simultaneous twin connect the remote controller to indoor units. Can control all functions of the indoor unit even if dif-

ferent models (different types) are mixed. Note that there may be some restrictions of the functions.

22

Electrical wiring diagram

• Power supply terminal block L, N

• Indoor/outdoor connection cable terminal
block 1,2 (Polarity)

• Remote controller cable terminal block
1,2 (No polarity)

(2) Wireless remote controller

(Reference)

11

If simultaneous twin connect the remote controller to indoor units. Can control all functions of the indoor unit even if dif-

ferent models (different types) are mixed. Note that there may be some restrictions of the functions.

22

Electrical wiring diagram

35

9-3. TWO-REMOTE CONTROLLER OPERATION

(1) Two Wired Remote Controllers

(R: Wired remote controller)

Slim Air Conditioner System

Standard 1:1 Simultaneous Twin

[Reference]
1 In the case of free component multi type systems consisting of simultaneous twin units, connect the remote controllers to each indoor unit.

All the functions of the connected indoor units can be controlled even if the system consists of different models. However, some function may be
restricted.

2 In the case of free component multi type systems consisting of simultaneous twin units, the indoor units should be connected by crossover wiring.
3 Set one of the remote controllers as the main controller (factory setting) and the other as the sub controller using the remote controller's function

selection.

(2) Two Wireless Remote Controllers

Slim Air Conditioner System

Standard 1:1 Simultaneous Twin

Remote
controller
connection
circuit
(Controller
cable)

Outdoor unit
OC

Indoor unit IC

Wired remote
controller R

Outdoor unit
OC

Indoor unit IC

Wired remote
controller R

OC

2

2

IC-1

IC-2

R-1

R-2

2

2

2

OC

2

IC

R-1

R-2

2

OC

2

IC-1

IC-2

R-1

R-2

2

2

Remote
controller
receiver
connection
circuit

Outdoor unit
OC

Indoor unit IC

Wireless remote
controller re­ceiver section R'

—

* Numbers given in ( ) apply when power is supplied to the indoor and outdoor units separately.
[Reference]
1 In the case of free component multi type systems consisting of simultaneous twin units, connect two wireless remote controller receivers

(one each) to any two of the indoor units. All the functions of the connected indoor units can be controlled even if the system consists of different
models. However, some functions may be restricted.

2 In the case of free component multi type systems consisting of simultaneous twin units, the indoor units should be connected by crossover wiring.

In the case of "standard 1:1" connection, it is not possible to connect two remote controller receivers to the indoor units. However, with systems

3

consisting of simultaneous twin units, it is possible to connect a remote controller receiver to two indoor units. In this case, all the pair numbers
will be "0" (factory setting, no change necessary), and all the units will be turned ON/OFF simultaneously.

4 When using two or more wireless remote controllers, the display contents on the remote controllers may differ from the actual settings, since the

operation made last by any of the remote controllers will be effective.

(3) One Wired and One Wireless Remote Controller

(R: Wired remote controller, R': Wireless remote controller receiver)

Slim Air Conditioner System

Standard 1:1 Simultaneous Twin

Remote
controller
receiver
connection
circuit

Outdoor unit
OC

Indoor unit IC

•Wired remote
controller R

•Receiver R'

OC

2

2

IC-1

IC-2

R

R'

9

[Reference]

1

In the case of free component multi type systems consisting of simultaneous twin units, connect both the wired remote controller and wireless
remote controller receiver to any one of the indoor units. All the functions of the connected indoor units can be controlled even if the system
consists of different models. However, some functions may be restricted.

2

In the case of free component multi type systems consisting of simultaneous twin units, the indoor units should be connected by crossover wiring.

3

When using two or more wireless remote controllers, the display contents on the remote controllers may differ from the actual settings, since the
operation made last by any of the wireless remote controllers will be effective.

(R': Wireless remote controller receiver)

2

2

2

Remote controller cable

Indoor controller board switch setting

SW5-3

OFF

ON

Indoor unit IC

IC-1 (Main)

IC-2 (Sub)

Indoor controller board switch setting

SW5-3

OFF

ON

Indoor unit IC

IC-1 (Main)

IC-2 (Sub)

Indoor controller board switch setting

SW5-3

OFF

ON

Indoor unit IC

IC-1 (Main)

IC-2 (Sub)

Remote
controller
cable

OC

2

IC

2

R-1

Indoor/outdoor
connection cable

R-2

2

Indoor/outdoor
connection cable

Receiver
connection
cable

OC

2

IC-1

9 9

R'-1

IC-2

R'-2

Remote
controller
cable

OC

3(2)

IC

Receiver
connection

9

2

cable

R

R'

Indoor/outdoor
connection cable

36

2.Connecting the remote control interface with each system

(For details on each system, see the relevant instruction manual.)

• Replace the interface unit mounting cord clamp with a supplied mounting cord clamp based on the thickness of the
connecting cable used for each system.

• The cables connected to the Indoor unit should be mounted on or near the Indoor unit.
If the connecting cable is not securely mounted, the connector may detach, break, or malfunction.

• Set the interface dip switch (SW500–502) settings before turning on the power.

• If the interface dip switch (SW500–502) settings are not set correctly, the system will not function properly.

INDOOR

9-4. GROUP CONTROL OPERATION

(COLLECTIVE OPERATION AND CONTROL OF MULTIPLE REFRIGERANT SYSTEMS (2 to 16))

●

●

●

●

Group control can be operated by using MAC-397IF-E.
The setting of wired remote controller is subjected to variation according to the function of the indoor unit.
(for mode operation, setting temperature, fan step, air direction)
The display of remote controller and operating the indoor unit might be different.
Neither the test run nor the function setting can be done by MA remote controller connected with MAC-397IF-E.

1.Connecting the MA& CONTACT TERMINAL Interface to the Indoor Unit

• Connect the interface unit and the indoor control board using the connecting cable that came with the interface.

• Extending or shortening the connecting cable that comes out of the interface may cause it to malfunction. Also,

keep the connecting cable as far as possible away from the electrical wires and ground wire. Do not bundle them together.

CN105

or

CN92

Indoor control board

Mounting screws (black) 3.5 o 12

Connect the connecting cable that comes with the
interface unit to the connector
CN105 or CN92 on the indoor control board.

Interface unit mounting cord clamp or mounting
cord clamps

Connecting cable for each system

Mounting cord clamp

Electrical wire mounting
bracket

Mounting screws 4 o 16

Mounting screws 4 o 10

Mounting cord clamp

37

Use as a Wired Remote Control (Using the MA Remote Controller)

Note:

1. Be sure the Auto Heating/Cooling Display Setting on the MA remote controller is set to OFF before use.

• For information on how to set the Auto/Heating Cooling Display Setting, see the MA remote controller
instruction manual.

• The actual operating status of the unit may differ from what is shown on the remote controller display

2. A test run cannot be initiated using the test run switch on the MA remote controller..

3. The horizontal vanes on the unit cannot be operated using the louver switch.

4. The range of room temperature indication is between 10: and 38:.

CN560

TB580

2

1
2
A
B

Indoor unit

Remote control cord that came with
the MA remote controller (Non polarity)

Dip switch settings

SW500 does not have to be set.

SW501:
SW501- No. 1-4: Refrigerant address

Set this switch when multiple indoor units (and remote control interfaces) are connected to a single MA remote controller.
Always start the refrigerant address at "0".

1

Even when connecting multiple outdoor units, set a different refrigerant address for each indoor unit.

ON

1

2 3 4

ON

1

2 3 4

ON

1

2 3 4

ON

1

2 3 4

1Outdoor unit
2Outdoor unit
3Indoor unit
4Interface
5MA remote controller

Refrigerant
address

0

1

2

15

SW501- No. 5–6

ON

5

6

When the model of Mr. SLIM exists in the same group, it sets it to turning ON.

Set them to ON only when using the room temperature sensor installed in the MA remote controller.
* This can be switched when an accurate room temperature cannot be detected by the air conditioner unit.
PK-FAK series do not have a room temperature sensor on their MA remote controllers.

No. 5 should normally be set to OFF.
Under the following conditions, No.6 should normally be set to ON.

Interface unit

Refrigerant
address "0"

Refrigerant
address "1"

Refrigerant
address "2"

MA remote controller
(PAR-21MAA)
* PAR-20MAA cannot be used

with this interface.

112

3333

4

5

44

38

SW501: Settings to accommodate MA remote controller and settings to accommodate outdoor units

SW No.

No. 1
No. 2
No. 3
No. 4

ON

1

ON

1

ON

1

ON

1

ON

1

ON

1

ON

1

ON

1

ON

1

ON

1

ON

1

ON

1

ON

1

ON

1

ON

1

ON

1

Functions OFF ON Comments

Only specify these settings when connecting an

2 3 4 5 6

Refrigerant address 0

MA remote controller.

Refrigerant address 1

2 3 4 5 6

Refrigerant address 2

2 3 4 5 6

Refrigerant address 3

2 3 4 5 6

Refrigerant address 4

2 3 4 5 6

Refrigerant address 5

2 3 4 5 6

Refrigerant address 6

2 3 4 5 6

Refrigerant address 7

2 3 4 5 6

Refrigerant address 8

2 3 4 5 6

Refrigerant address 9

2 3 4 5 6

Refrigerant address 10

2 3 4 5 6

Refrigerant address 11

2 3 4 5 6

Refrigerant address 12

2 3 4 5 6

Refrigerant address 13

2 3 4 5 6

Refrigerant address 14

2 3 4 5 6

Refrigerant address 15

2 3 4 5 6

SW No.

No. 5
No. 6

Functions
Room temperature detector
The model of Mr. SLIM exists in the

same group.

Indoor unit
Not mixed

OFF

39

ON
Remote control
Mixed

Comments
This should normally be set to OFF.
This should normally be set to ON.

* Fan speed 2 step model : An actual fan speed is 2 step though the display of remote controller becomes 4 step or 3 step.

3. Test Run (Check Operations)

Interface status monitor

You can check the status of the interface by the LED lamp on the interface unit board.

LED lamp no.

LED521

LED522

LED523

Lamp off

DC 12 V is not being supplied from the
air conditioner.

Device is not communicating properly
with the air conditioner.

Device is not communicating properly
with the MA remote controller.

Lamp on

DC 12 V is being supplied from the air
conditioner.

–

–

Blinking

–

Blinking at approx. 1 second intervals: Device is
communicating normally with the air conditioner.

Blinking at approx. 8 second intervals: Device is com­municating normally with the MA remote controller.

SW502 : Air Conditioner Function Settings

SW No.

No. 1

No. 2

No. 3

No. 4

No. 5

No. 6

No. 7
No. 8

Functions

Cooling only type/ Heat pump type

Auto mode

Fan speed

Vane

Swing

Not in use
Fan mode

OFF

Heat pump type

Not available

(setting No.3 disabled)

Available

(unit)

Available

Available

–

Not available

ON

Cooling only type

Available

(setting No.3 enabled)

Available

(remote controller)

Not available

Not available

–

Available

Comments

Set to OFF.

Permanently set to OFF.

4 speeds

3 speeds (2-speed

model set ON)

When operating a 2-speed model with the 3-speed
setting (ON), the MA remote controller display will
indicate 3 fan speeds.
The table below shows the displays and the actual
outputs at that time.

Display Meaning Indoor unit output

Low speedLow speed

Medium speed High speed

High speed

Set the mode in accordance with the operation
manual for the indoor unit.

Heat pump type : Set to ON.
Cooling only type : Set to OFF.

The Vane function of either of indoor unit :
When the function is provided, it is Available (OFF).
When the function is not provided, it is Not available (ON).

The Swing function of either of indoor unit :
When the function is provided, it is Available (OFF).
When the function is not provided, it is Not available (ON).

Set to ON.

High speed

4. Mounting the Remote Control Interface Unit

The Interface unit should be placed in a location where the connecting cable from the interface can reach an indoor unit.
The device will not function properly if the connecting cable is extended so the connecting cable should not be extended.
Mount the interface unit securely to a pillar or wall using 2 or more screws.

■ When Using Wall Mounting Brackets

1

Attach the wall mounting brackets to the interface unit
using 2 mounting screws.

2

Mount the unit to a pillar or wall using 2 mounting screws.

Interface unit

Wall mounting
brackets

Mounting screws

Mounting screws

Cord clamp for
wiring

Mounting screws

40

■ When Mounting Directly to a Wall

Mount the interface unit case to the wall using the mounting
screws.

Interface case
mounting screws

Mounting
screws

* When mounting the interface unit using a cushioning

material , be sure to mount it in a location where it will not
fall.

Interface unit

Cushioning material

When mounting the interface unit inside a ceiling
or wall, install an access door to facilitate mainte­nance.

When the interface unit is mounted
above an indoor unit, it should be
positioned 40 mm or more away from the
unit to ensure that ceiling grills can be
removed.

40 mm or more

Attach the interface unit connecting cable here.
Store extra connecting cable in the ductwork space
behind the indoor unit.

* If there is any slack in the connecting cable, use a

fastener to keep it in place.

41

9-5. POWER OUTAGE AUTOMATIC RECOVERY OPERATION

Indoor unit Indoor unit Indoor unit

Remote controller

Control room room 1 room 2 room 3

Indoor unit

Relay box Relay box Relay box

Indoor unit

Control circuit
power supply

Indoor unit Indoor unit

Remote
controller

Remote/Local
selection switch

Control room W

room 1 room 2 room 3

Remote
controller

Remote
controller

Remote
controller

• Whenever a power outage or switching of the power supply causes the power supply of an operating air conditioner to go
from OFF to ON, this function will automatically restore the operation of the air conditioner to its previous operating mode.
w If the power is turned from OFF to ON when the air conditioner is not in operation, the air conditioner will not automatically

be turned on. However, the timer operation will be cancelled if the air conditioner is in timer operation (including when the
unit is waiting for its start time). Setting for timer operation must be performed once again.

• If there is a momentary power outage of less than one second while the air conditioner is in operation, there may not be a
clear determination of whether or not there was a power failure. When it has been determined that there has been a power
failure, recovery will take approximately four minutes after the power is restored. Please wait. (Once "PLEASE WAIT" has
appeared on the display, a protection system will operate to prevent the unit from restarting for three minutes.)
When it has been determined that there has been no power failure, operation will continue as is.

• Settings can be made by function selections from the remote controller.

• When there is group control, selection of all refrigerants is required.

9-6. INDIVIDUAL CONTROL OPERATION FROM A SEPARATE ROOM

• By simply centralizing the remote controllers installed in each room in a separate control room, individual control or central­ized monitoring of the air conditioners in each room can be attained.

• Air conditioner control can be performed up to a total of 500 meters away by connecting the indoor units and remote con­trollers with 0.3 to 1.25 mm22-core cable.

• If a remote controller is installed in a room and control room, refer to the section on operating with two remote controllers.

9-7. COMBINED REMOTE/LOCAL CONTROL

• Operation/remote controller prohibit/ stop can be controlled from a remote location by routing the remote stop/start adapter
(PAC-SE55RA-E sold separately) through the relay box installed on site. When this remote control is cancelled, the local
remote controller can be used for operating and stopping the air conditioner.

1. Basic system wiring

• Use the remote start/stop adapter (PAC-SE55RA-E) and connect the "Start/Stop Circuit From Remote Location" that comes
from the relay box and remote/local selection switch and connect it to the CN32 connector on the printed circuit board for
the indoor unit

<Points of precaution>

11

Match the rated power supply voltage of the remote/local selection switch and relay (X2) with the power supply for the con-

troller.

22

When performing group control of multiple outdoor unit using a timer, be sure to arrange the timer so that all units do not start

at the same time. If this is not performed, all of the units will start at one time creating an over current that will cause the circuit
breaker to operate.

33

An on-delay system is one that includes specifications for operating a limited time when an on signal is received and has a tem-

porary off timer for recovery operations.

44

Use a connecting relay when the wiring length exceeds 10 meters, such as when performing remote wiring. If this is not pro-

vided, abnormal operation will occur.

(1) System diagram

W The AC for the control room is usually disconnected from the remote/local control system.

42

Control circuit
power supply

Dedicated short
circuit prevention
device

Remote/Local
selection switch

No.1 unit
relay box

No.2 unit
relay box

3 Relay box

2

Adapter for

remote start/stop

1

Remote/Local

selection switch

T Timer

(On delay system)

X Relay

Model
PAC-SE55RA-E
(Sold separately)

(Example)
Single polarity
single-throw switch
(125V rating)

To
next
unit

T

Brown
Red

X

2 X2

T

One method of easily
distinguishing the on/off
status of SW1 and SW2
is to use together with a
"illuminated switch R" or
pilot lamp.

T

X

2

SW1
SW2

T

X

2

Orange Orange

Brown

Red

•

Starting/stopping
with remote
controller disabled.

• Starting/stopping by
remote operation
enabled.

•

Starting/stopping
with remote
controller disabled.

• AC is in operation.

• Starting/stopping by
remote operation
enabled.

•

Starting/stopping
with remote
controller disabled.

• Starting/stopping by
remote operation
enabled.

•

Starting/stopping
with remote
controller disabled.

• AC is in operation.

• Starting/stopping by
remote operation
enabled.

Remote
control

OFFON

Description of
functions

OFFON

SW1
SW2

OFFON

Remote/Local
selection switch

(2) Basic wiring diagram

Indoor unit
circuit board

CN32

Orange
Red

Brown

On site wiring On site wiring

On site wiring

Timer

Timer

For remote operation

On site wiring

On site wiring

This is not used.
Protect exposed wire by
wrapping with insulating tape

On site wiring

SW1

Indoor unit
circuit board

CN32

Orange
Red

Brown

SW1
SW2

Indoor unit
circuit board

CN32

Orange
Red

Brown

SW2

Indoor unit
circuit board

CN32

Orange
Red

Brown

SW2

Indoor unit
circuit board

CN32

Orange
Red

Brown

Indoor unit
circuit board

CN32

Orange
Red

Brown

SW2

For remote operation

For timer operation

(3) Part specifications

Note: When using group address, connect to refrigerant

address "0" on the inside.

2. Examples of system applications

In any of the following examples, there is a five to six second delay from the time the operating command is issued until the
operation begins.
1 This is when starting and stopping is performed by remote operation or external timer and when starting and stopping by

the remote controller is to be prohibited.

2 This is when starting and stopping is performed by remote operation or external timer and when starting and stopping by

the remote controller is to be separated.

3 This is when starting and stopping is performed by remote operation and then allowing starting or stopping by remote con-

trol at any time.

4 This is when permitting or prohibiting operation by remote controller is performed by external circuit.

Use momentary switch for SW2. (Manual operation/automatic recover switch on
time is more than one second.)
Press SW2 (on time is more than one second) and operation starts. After this has
been done, stopping or restarting can be down by remote controller.

43

If SW2 is on, operation by remote controller cannot be
performed.
If SW2 is off, operation by remote controller is permitted.

9-8. OBTAINING REMOTE DISPLAY

CN90 CN1

CN41

Wireless

3

TB3

External input

TB2

Error

TB1

Operation

2

Indoor control circuit board Remote operation adapter

5

External input

Error output
(No voltage momentary "a" contact)

Operating output
(No voltage momentary "a" contact)

No voltage
(Momentary "a" contact)

HA

Power supply for controller

Timer control

panel (on-site)

Remote controller

Indoor unit

Remote controller

Indoor unit

Remote controller

Indoor unit

Use the remote operation adapter (PAC-SF40RM-E) to provide operation/error non-voltage contact output and on/off input
function.

(1) Wiring method

..

Caution

TB3 is a dedicated terminal for contact point input. Never input voltage. It will damage
the indoor control circuit board.

<Connections on the indoor unit side>

1 When using external output function

Insert the 9-prong connector (3-core) of the attached cable to CN90 on the indoor control circuit board.

2 When using the external input function

Insert the 4-prong connector (2-core) of the attached cable to CN41 on the indoor control circuit board.
W The connector is direction-sensitive. Use care not to make an error when inserting.

Never force the connectors. This will result in damage.

(2) Locally procured parts

Item Name Model and specifications

External output function External output signal wire Use sheathed vinyl coated cord or cable.

Wire type: CV, CVS or equivalent.
Wire size: Stranded wire 0.5mm

2

to 1.25mm

Single straged: {0.65mm to 1.25mm

Display lamp, etc. No voltage “a” contact AC200V (DC30V), 1Aor less

External input function External input signal wire Use sheathed vinyl coated cord or cable.

Wire type: CV, CVS or equivalent.
Wire size: Stranded wire 0.5mm2to 1.25mm

Single straged: {0.65mm to 1.2mm

Switch No voltage “a” contact

(Start and stop operation is switched by inputting a
pulse of 200ms or more)

2

2

9-9. TIMER OPERATION

● Timer operation can be performed by setting the wired or wireless remote controller timer. Start and stop times can be set in
10-minute increments within a 24-hour period.

● When used in combination with the central control remote controller of the M-NET control system for the outdoor unit, one
program timer can be used for individual timer settings for each group of the central control system. (Each timer setting can
be stored in data memory so timer settings for up to 50 groups can be set individually.)

W Please refer to the MELANS catalog or technical information for details about the central control remote controller.

1.Operating with on-site timer

(1) Summary of system

If the “Remote ON/OFF adapter” (PAC­SE55RA-E) (sold separately) is used, the
on-site timer can be operated to turn each
unit on and off.

44

(2) Basic pattern for timer control

Orange

As selected by remote controller operation switch.

From indoor unit

Red
Brown

T

SW ON
SW OFF

Timer control
Remote controller control

SW

Orange

From indoor unit

Red
Brown

T

Wiring diagram

Control circuit board

Slim indoor unit

Lossnay

Lossnay linkage
(PAC-SB81VS)

External control

input terminal

block

1
2

3

Connector

(CN2L)

Basic wiring

X: Relay
(DC12V) CN25 (Indoor unit circuit board)

System example

Remote controller

Indoor unit

Relay box
(On-site tinstallation)

Relay box

(On-site tinstallation)

Remote controller

Humidifier unit

Humidifier

unit

Use a no-voltage contact point output timer (one that has separate circuits for the load side and timer power supply).
a) Timer-independent control b) Combined control by timer and remote controller

(3) Basic system

Refer to 9-7.

9-10. LINKED OPERATION WITH PERIPHERAL AIR CONDITIONERS EQUIPMENT

■ Lossnay operation

● Linked operation with a Lossnay unit can be obtained by connecting Lossnay linkage cable (Model PAC-SB81VS - sold

separately) to the CN2L (Remote kit) on the circuit board of the indoor unit. This function must be selected from the
remote controller.

1 Summary of wiring

● Connect the Lossnay linkage cable (Model PAC­SB81VS) connector to CN2L on the indoor unit on the
circuit board of the indoor unit.

● Connect the lead wire of the Lossnay linkage cable to
the Lossnay external control input terminal blocks (1)
and (2).
(At this time, the input terminal blocks (1) and (2)
have no polarity.)

2 Precautions when wiring

● The Lossnay linkage cable can be extended up to a maximum of 500 meters.
When extending the Lossnay linkage cable, be sure to connect securely and take proper steps to ensure insulation.
(Extension cable specifications: Sheathed vinyl cord or cable 0.5 to 0.75mm

● Lossnay linked cable

● Arrange wiring so that there can be no contact between the Lossnay linkage cable and the power supply cord. Contact

may cause malfunctioning. (Separate by 5cm or more.)

2

)

9-11. OBTAINING HUMIDIFIER SIGNAL

9-12. EXTERNAL MOUNTING OF TEMPERATURE SENSOR

● The humidifier signal that is linked to the AC heating operation (indoor unit ventilator) can be obtained by connecting the
adapter for the humidifier signal to connector CN25 on the printed circuit for the indoor unit and wiring it to the humidifier
unit via the on-site relay box. There is no output when the thermostat is off, during heating preparation and during
defrosting.

W Please consult your nearest Mitsubishi Electric

representative for information about obtaining the
adapter for humidifier signal.

● Temperature control from an alternative external location can be performed by connecting the temperature sensor (Model
PAC-SE41TS-E - sold separately) to the CN20 connector on the circuit board for the indoor unit.

● The wired remote controller also has an internal temperature sensor. Function selection from the remote controller is
required.
Refer to “FUNCTION SETTING” for information of installation manual about selecting functions with the remote controller.

45

9-13. MULTIPLE REMOTE CONTROL DISPLAY

CN51

connector(5P)

GREEN

Power
supply

Electrical insulation is needed.

Wiring at the actual place

Optional multiple display
adapter

The maximum distance between
indoor board and relay is 10m.

YELLOW
ORANGE

RED

BROWN

5

X2

X2

GL

RL

X1

X1

1

<Wiring >

Power
supply

Remote
controller
cable

Relay box
(Field supply)

Remote
controller

Remote
controller

Remote
controller

3wires
3wires
3wires

2wires

No.1 unit No.2 unit No.3 unit

Muitiple remote control
ON-OFF display
(Field supply)

(Operation check)

<System>

Power
supply

RL-1
GL-1

Multiple Remote Control Display

Multiple remote
controller adapter

connect to
the connector CN51

Relay box

5

X1-1

X2-1

1

<Wiring diagram>

RL-2
GL-2

RL-3

No.1 unit

GL-3

X1-1

X2-1

X1-2

X1-3

X2-3

X2-2

5

1

No.2 unit

5

1

No.3 unit

X1-2

X2-2

X1-3

X2-3

You can control several units with a multiple remote control display, by
wiring an optional multiple display adapter (PAC-SA88HA-E) with relays
and lamps on the market.

How to wire

(1) Connect the multiple display adapter to the connector CN51 on the

indoor controller board.

(2) Wire three of the five wires from the multiple display adapter as shown

in the figure below.

[Notes on Signs]
X1:Relay (for operation lamp)
X2:Relay (for check lamp)
RL:Operation Lamp
GL:Check Lamp

[Field supplied parts]

Relays:12V DC with rated coil power

consumption below 0.9W.

Lamps:Matching to power supply voltage.

46

DISASSEMBLY PROCEDURE10

Metal fixture

Screws

Hanger of indoor unit

Catch of installation plate

Terminal cover

Electrical box cover

Connector

Connector

Indoor controller
board

Right side panel

PK-4FAKL

OPERATING PROCEDURE PHOTOS & ILLUSTRATION

1. Removing the lower side of the indoor unit from the instal­lation plate

(1) Remove the 2 screws.

Hang the indoor unit hangers to the catches on the instal­lation plate.

Figure 1

2. Removing the right side panel

(1) Remove the 2 screws of the right side panel:one on the

bottom and the other on the upper right-hand side.
(2) Disconnect the connector from the adapter case.
(3) Sliding the right side panel to the right, pull it out toward

you.

3. Removing the indoor controller board

(1) Remove the right side panel.
(2) Remove the screw of the electrical box cover, and remove

the cover.
(3) Disconnect the connectors on the indoor controller board.
(4) To unhook the catches on the right-hand side of the indoor

controller board, pull the left-hand side toward you and lift

up the cover to the right. Then the indoor controller board

can be removed.

Figure 2

Photo 1

Indoor controller
board

Electrical
box cover

Catches

4. Removing the electrical box

(1) Remove the right side panel.
(2) Remove the screw of the electrical box cover, and remove

the cover.
(3) Remove the room temperature thermistor and the pipe

temperature thermistor.
(4) Disconnect the vane motor connector on the indoor

controller board.
(5) Remove the 2 screws of the electrical box.
(6) Disconnect the connector of the heater lead wire connec-

tor.
(7) Disconnect the connector of the fan motor lead wire.
(8) Remove the electrical box.

47

Photo 2

Room temperature thermistor

Pipe temperature thermistor

Screws

Electrical box

OPERATING PROCEDURE PHOTOS & ILLUSTRATION

Catch on the left side panel

Catch on
the unit

(9) Remove the screws of the indoor controller board case,

and pull out the indoor controller board case.
Then the indoor power board and the fan capacitor can be
serviced.

5. Removing the vane motor

(1) Remove the right side panel.
(2) Remove the screw of the electrical parts box cover, and

remove the cover.

(3) Remove the 2 screws of the vane motor, and remove the

motor from the shaft.

(4) Disconnect the vane motor connector on the indoor con-

troller board.

Photo 3

Capacitor

Indoor controller
board case

Photo 4

Indoor
power board

Electrical parts box

Screws

6. Removing the intake grille

(1) Remove the right side panel.
(2) To remove the left side panel, remove the screw on the

bottom and the screw on the upper left-hand side. (See
Figure 3.)

1. Press up this side of the left side panel to unhook the
catch on the panel from the catch on the unit.

2. Slide the left side panel to the left to remove the panel.

Note: Fix the unit to the metal fixture securely.
(3) Remove the air filters.
(4) Hold and press the centre cover.
(5) Remove the screws of the grille.
(6) Pull the lower side of the grille toward you and slide the

upper to the right to remove the grille.

7. Removing the drain pan

(1) Remove the left and right side panels.
(2) Remove the grille.
(3) Remove the electrical box cover.
(4) Loosen the drain hose band to remove.
(5) Remove the 3 screws of the drain pan, and slide the drain

pan toward you to remove drain pan.

Vane motor

Figure 3

Photo 5

Left side panel

Photo 6

Indoor controller board

Slide to the
right

Screws for grille

Drain pan

Screws

Grille

Drain hose
band

Drain hose

48

OPERATING PROCEDURE PHOTOS

8. Removing the lineflow fan and the fan motor

(1) Remove the left and right side panels.
(2) Remove the grille.
(3) Remove the electrical box.
(4) Remove the drain pan.
(5) Loosen the screw that fixes the lineflow fan to the fan

motor. (See Photo 7. )

(6) Remove the 4 screws of the motor fixture, and remove the

fan motor and the motor fixture at a time (See Photo 8.)

(7) Remove the screws of the left and right motor supports,

and remove the motor supports and the fan motor. (See
Photo 9.)

(8) Remove the screw of the centre support, and remove the

support. (See Photo 10. )

(9) Remove the 2 screws on the left and right sides of the heat

exchanger, and pull the bearing support toward you. (See
Photo 11.)

(10) Pull the left-hand side of the heat exchanger toward you,

and remove the lineflow fan.

Photo 7

Photo 8

Fan motor

Lineflow fan

Screw

Fan motor

Screw

Motor fixture

Heat exchanger

Bearing support

Lineflow fan

Photo 9Photo 11

Screw

Motor support

Photo 10

Centre support

Fan motor

Lineflow fans

Screw

Screw

Motor
support

49

11 PARTS LIST

RU

1
1
1
4
2
1
1
1
1
1
1
1
1
1

R01 12G 662
R01 E01 812
R01 E00 811
R01 A17 500
R01 12G 691
R01 24K 658
R01 12G 661
R01 E00 075
R01 E01 049
T7W E06 714
R01 12G 808
R01 E01 641

—

R01 12G 523

1
2
3
4
5
6
7
8

9
10
11
12
13
14

(RG00A734GK4)

Part No.

No.

Wiring

Diagram

Symbol

Recom­mended

Q,ty

Unit

Amount

Remarks

(

Drawing No.

)

Part Name

Specifications

Q,ty/set

LEFT SIDE PANEL
UNDER PLATE
NOSE
AIR FILTER
INTAKE GRILLE
RECEIVER
RIGHT SIDE PANEL
WIRELESS REMOTE CONTROLLER HOLDER
WIRELESS REMOTE CONTROLLER DOOR
WIRELESS REMOTE CONTROLLER
BACK PLATE
TOP PLATE
BOX ASSEMBLY
DRAIN SOCKET

PK-•FAKL

Price

2.5, 3

STRUCTURAL PARTS
PK-2.5FAKL
PK-3FAKL

1112

1

13

8

910

2

3

5

7

4

6

Part numbers that is circled is not shown in the figure.

50

RU

1
1
1
5
2
1
1
1
1
1
1
1
1
1
1

R01 12G 662
R01 E00 812
R01 E01 811
R01 A17 500
R01 12G 691
R01 24K 658
R01 12G 661
R01 E00 075
R01 E01 049
T7W E06 714
R01 16G 808
R01 E00 641

—

R01 16G 692
R01 12G 523

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15

(RG00A734GK5)

Part No.

No.

Wiring

Diagram

Symbol

Recom-

mended

Q,ty

Unit

Amount

Remark

(

Drawing No.

)

Part Name

Specification

Q,ty/set

LEFT SIDE PANEL
UNDER PLATE
NOSE
AIR FILTER
INTAKE GRILLE
RECEIVER
RIGHT SIDE PANEL
WIRELESS REMOTE CONTROLLER HOLDER
WIRELESS REMOTE CONTROLLER DOOR
WIRELESS REMOTE CONTROLLER
BACK PLATE
TOP PLATE
BOX ASSEMBLY
INTAKE GRILLE
DRAIN SOCKET

4

PK-•FAKL

Price

STRUCTURAL PARTS
PK-4FAKL

1112

14

13

8

910

1

2

3

7

5

4

6

Part numbers that is circled is not shown in the figure.

51

Part No.

Specification

No.

Wiring

Diagram

Symbol

Recom-

mended

Q,ty

Price

Unit

Amount

Remarks

(

Drawing No.

)

Q,ty/set

PK-•FAKL

2.5 3

1

2

3

4

5

6

7

8

9
10
11
12
13
14
15
16

R01 Z61 102
R01 13G 114
T7W 572 480
T7W 573 480
T7W E13 529

—

—
R01 12G 621
R01 12G 063
R01 12G 002
R01 KV5 527

—
R01 E05 223
R01 E03 317

—
R01 588 255
T7W E47 310

Part Name

BEARING MOUNT
LEFT LINEFLOW FAN
HEAT EXCHANGER
HEAT EXCHANGER
DRAIN PAN
GUIDE V ANE
ARM
CENTER COVER
JOINT SHAFT
AUT O V ANE
DRAIN HOSE
GUIDE V ANE
VANE MOTOR
WIRELESS ADAPTER CONTROLLER BOARD
TERMINAL COVER
CAPACITOR
INDOOR CONTROLLER BOARD

1
1
1

1

16

3
1
1
2
1
4
1
1
1
1
1

1
1

1
1

16

3
1
1
2
1
4
1
1
1
1
1

(BG25J821H01)
(BG25H301H02)

(BG25J821H02)

(BG02J608H07)

MV

W.B

C

I.B

2.0= 440V

ELECTRICAL PARTS
PK-2.5FAKL
PK-3FAKL

1

37

36

2

32

33

34

35

3

4

31

5

30

29

27

6

28

7

8

25

22

21

20

26

19

23

18

9

24

11

10

13

14

15 16 1712

52

Continued to the next page.

17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37

R01 E02 239

—

—
T7W E24 313
T7W 512 716
T7W E27 716
T7W A14 716
T7W E12 202
R01 E02 202

—
R01 12G 220
R01 12G 105

—
R01 13G 115

—

—
R01 KV5 102
R01 12G 103

—
T7W B02 675
R01 005 103

FUSE
CONTROLLER COVER
CONTROLLER CASE
INDOOR POWER BOARD
TERMINAL BLOCK
TERMINAL BLOCK
TERMINAL BLOCK
ROOM TEMPERA TURE THERMISTOR
PIPE TEMPERA TURE THERMISTOR
MOTOR BAND
FAN MOTOR
RUBBER MOUNT
MOTOR BAND
RIGHT LINEFLOW FAN
CENTER SUPPORT
BEARING BAND
BEARING MOUNT
SLEEVE BEARING
MOTOR LEG
FUN GUARD
SLEEVE BEARING

1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
2
1

1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
2
1

250V 6.3A

2P(1, 2)
3P(1, 2, 3)
3P(L,N,;)

PN4S40-K

(BG02A648G03)
(BG25J080H02)

(BG02H065H01)

(BG02H178H01)

(BG00R259G07)
(BG02L462H02)

(BG02A534H16)

FUSE

P.B
TB5
TB4
TB2
TH1
TH2

MF

Part No. Part Name

Specification

2.5 3

PK-•FAKL

Unit

Remarks

(

Drawing No.

)

Wiring

Diagram

Symbol

Recom­mended

Q,ty

Amount

Price

Q,ty/set

No.

From the previous page.

53

Part No.

Specification

No.

Wiring

Diagram

Symbol

Recom­mended

Q,ty

Price

Unit

Amount

Remarks

(

Drawing No.

)

Q,ty/set

PK-•FAKL

4

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16

R01 Z61 102
R01 17G 114
R01 46G 480
T7W E14 529

—

—
R01 12G 621
R01 12G 063
R01 16G 002
R01 KV5 527

—
R01 E05 223
R01 E03 317

—
R01 576 255
T7W E47 310

Part Name

BEARING MOUNT
LEFT LINEFLOW FAN
HEAT EXCHANGER
DRAIN PAN
GUIDE V ANE
ARM
CENTER COVER
JOINT SHAFT
AUT O V ANE
DRAIN HOSE
GUIDE V ANE
VANE MOTOR
WIRELESS ADAPTER CONTROLLER BOARD
TERMINAL COVER
CAPACITOR
INDOOR CONTROLLER BOARD

1
1
1
1

22

4
1
1
2
1
4
1
1
1
1
1

(BG25J821H01)
(BG25H301H02)

(BG25J821H02)

(BG02J608H07)

MV

W.B

C

I.B

3.0= 440V

ELECTRICAL PARTS
PK-4FAKL

1

37

36

2

32

33

34

35

3

4

31

5

30

29

27

6

28

7

8

25

22

21

20

26

19

23

18

9

24

11

10

13

14

15 16 1712

54

Continued to the next page.

From the previous page.

Part No. Part Name

No.

17

R01 E02 239
18
19
20

T7W E24 313
21

T7W 512 716
22

T7W E27 716
23

T7W A14 716
24

T7W E12 202
25

R01 E02 202
26
27

T7W 571 762
28

R01 16G 105
29
30

R01 17G 115
31
32
33

R01 KV5 102
34

R01 12G 103
35
36

T7W B03 675
37

R01 005 103

—
—

—

—

—
—

—

FUSE
CONTROLLER COVER
CONTROLLER CASE
INDOOR POWER BOARD
TERMINAL BLOCK
TERMINAL BLOCK
TERMINAL BLOCK
ROOM TEMPERA TURE THERMISTOR
PIPE TEMPERA TURE THERMISTOR
MOTOR BAND
FAN MOTOR
RUBBER MOUNT
MOTOR BAND
RIGHT LINEFLOW FAN
CENTER SUPPORT
BEARING BAND
BEARING MOUNT
SLEEVE BEARING
MOTOR LEG
FUN GUARD
SLEEVE BEARING

Specification

250V 6.3A

2P(1, 2)
3P(1, 2, 3)
3P(L,N,;)

PN4S70-K

Q,ty/set

PK-•FAKL

4

1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
2
1

Remarks

(

Drawing No.

Wiring

Diagram

)

Symbol

FUSE
(BG02A648G03)
(BG25J080H02)

P.B
TB5
TB4
TB2
TH1
TH2

(BG02H065H01)

MF

(BG02H178H01)

(BG00R259G07)
(BG02L462H02)

(BG02A534H17)

Recom-

mended

Q,ty

Unit

Price

Amount

55

12

1
2
3
4
5

BRN
RED
ORN
YLW
GRN

OPTIONAL PARTS

12-1. REFRIGERANT PIPES

Service Ref. : PK-2.5FAKL PK-3FAKL

Part No. PAC-05FFS-E PAC-07FFS-E PAC-10FFS-E PAC-15FFS-E
Pipe length 5m 7m 10m 15m
Pipe size O.D .
Connection method Indoor unit: Flared Outdoor unit: Flared

Service Ref. : PK-4FAKL

Part No. PAC-PC51PI-E PAC-SC52PI-E PAC-SC53PI-E PAC-SC54PI-E
Pipe length 5m 7m 10m 15m
Pipe size O.D.
Connection method Indoor unit: Flared Outdoor unit: Flared

Note 1. How to connect refrigerant pipes.

Factory supplied optional refrigerant pipings contain refrigerant at the above atmospheric pressures. As long as the
connection takes no more than 5 minutes, no air will enter, and there will be no need for air purging.
Remove the blind caps and make the connections within 5 minutes. After the connections for the indoor and outdoor
units are made, open the stop valve on the outdoor unit to allow refrigerant gas to flow.

Note 2. The following main parts are contained in the optional refrigerant piping kit.

Heat insulating cover, vinyl tapes, nipples, sleeve and flange (for wall hole).

Liquid:[9.52 Gas:[15.88

Liquid:[9.52 Gas:[19.05

12-2. REMOTE DISPLAY ADAPTER

This adapter is needed for remote indication (operation/check).

Part No.

Applicable Service Ref.

PAC-SA88HA-E

PK-2.5, 3, 4FAKL

12-3. REMOTE ON/OFF ADAPTER

Part No.

Applicable Service Ref.

12-4. REMOTE SENSOR

Part No.

Applicable Service Ref.

12-5. REMOTE OPERATION ADAPTER

Part No.

Applicable Service Ref.

12-6. WIRED REMOTE CONTROLLER

Part No.

Applicable Service Ref.

12-7. DRAIN-UP MACHINE

Part No.

Applicable Service Ref.

PAC-SE55RA-E

PK-2.5, 3, 4FAKL

PAC-SE41TS-E

PK-2.5, 3, 4FAKL

PAC-SF40RM-E

PK-2.5, 3, 4FAKL

PAR-21MAA

PK-2.5, 3, 4FAKL

PAC-SE90DM-E

PK-2.5, 3, 4FAKL

HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

CCopyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Distributed in Apr. 2006 No.OC390 PDF 9
Made in Japan.

New publication, effective Apr. 2006
Specifications subject to change without notice.