Mitsubishi PCH-2GKHA1, PCH-2.5GKHA1, PCH-3GKHA1, PCH-4GKHSA1, PCH-5GKHSA1 Service Manual

TECHNICAL & SERVICE MANUAL

SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS

CONTENTS

1. FEATURES ···········································3

2. PART NAMES AND FUNCTIONS········7

3. SPECIFICATIONS·································8

4. DATA ···················································11

5. OUTLINES AND DIMENSIONS··········15

6. WIRING DIAGRAM·····························20

7.

REFRIGERANT SYSTEM DIAGRAM

······21

8. OPERATION FLOW-CHART··············22

9. MICROPROCESSOR CONTROL·······26

10. TROUBLESHOOTING ························49

11. DISASSEMBLY PROCEDURE ···········57

12. PARTS LIST········································62

13. OPTIONAL PARTS·····························73

Indoor unit

PCH-2GKHA PCH-2GKHA1
PCH-2.5GKHA PCH-2.5GKHA1
PCH-3GKHA PCH-3GKHA1
PCH-4GKHSA PCH-4GKHSA1
PCH-5GKHSA PCH-5GKHSA1
PCH-6GKHSA PCH-6GKHSA1

No. OC135

1997

[Models names] [Service Ref.]

This manual does not cover the
following outdoor units. When
serving them, please refer to the
service manual No.OC128 and
this manual in a set.
[Service Ref.]
PUH-2VKA

2

PUH-2.5VKA2
PUH-3VKA2
PUH-3YKA2
PUH-4YKSA3
PUH-5YKSA3
PUH-6YKSA2

INDOOR UNIT

Ceiling Suspended

Series PCH

REMOTE CONTROLLER

The Slim Line.
From Mitsubishi Electric.

FILTER

CHECK MODE

TEST RUN

3

● Operation buttons

● Once the operation of the unit is set, subsequent operation can

only be performed by pressing the ON/OFF button repeatedly.

FILTER

CHECK MODE

TEST RUN

4

This switches between
continuous operation and the
timer operation.

button

This sets the ventilation fan
speed.

button

button

This sets or switches the
current time. start time and
stop time.

button

This switches the horizontal
fan motion ON and OFF.

button

Press this button to switch

the cooler electronic dry
(dehumidify) automatic and
heater modes.

button

This resets the filter service
indication display.

FILTER button

This switches between the
operation and stop modes
each time it is pressed. The
lamp on this butoon lights
during operation.

ON/OFF button

This sets the room
temparature The temparature
setting can be performed in
1°C units

Setting range

Cooler 19°C to 30°C
Heater 17°C to 28°C

TEMP button

This model name of the
remote controller is indicated.

1

FEATURES

1. ADVANCED REMOTE CONTROLLER

Indoor unit

Ceiling Suspended

Series PCH

Remote controller

FILTER

CHECK MODE

TEST RUN

w Rating Conditions (JIS B 8616)

Cooling : Indoor : 27: (80

o

F)DB, 19: (66oF)WB.

Outdoor : 35: (95

o

F)DB, 24: (75oF)WB.

Heating : Indoor : 20: (68

o

F)DB.

Outdoor : 7: (45

o

F)DB, 6:(43oF)WB.

This adjusts the vertical angle
of the ventilation.

(This button dose not operate in
this model)

CHECK-TEST RUN button

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

Cooling capacity/Heating capacity

W Btu/h

Service Ref.

PCH-2GKHA1
PCH-2.5GKHA1
PCH-3GKHA1
PCH-4GKHSA1
PCH-5GKHSA1
PCH-6GKHSA1

5,400 / 6,200 (7,600)
7,000 / 7,100 (9,200)

7,500 / 8,500 (10,600)

10,000 / 10,450 (13,150)

12,400 /13,900 (16,900)

14,500 / 15,000 (18,000)

18,400 / 21,200 (25,900)
23,900 / 24,200 (31,400)
25,600 / 29,000 (36,200)
34,100 / 35,700 (44,900)
42,300 / 47,400 (57,700)
49,500 / 51,200 (61,400)

4

Caution

● Only the display lights when the unit is stopped and power supplied to the unit.

● When power is turned ON for the first time the (CENTRAL CTRL) display appears to go off momentarily but this is not a

malfunction.

● When the central control remote control unit, which is sold separately, is used the ON-OFF button, button and
TEMP button do not operate.

● “NOT AVAILABLE” is displayed when the

k button are pressed.This indicates that this room unit is not equipped with the

fan direction adjustment function and the louver function.

FILTER

CHECK MODE

TEST RUN

4

CENTRALLY
CONTROLLED display

This indicates when the unit is

controlled by optional features such
as central control type remote
controller.

display

This indicates when the continous

operation and time operation modes
are set.

It also display the time for the timer

operation at the same time as when
it is set.

OPERATION MODE display

This indicates the operation mode.

STANDBY display

This indicates when the standby

mode is set from the time the sleep
operation starts until the heating air
is discharged.

DEFROST display

This indicates when the defrost

operation is performed.

CHECK display

This indicates when a malfunction

has occurred in the unit which should
be checked.

display

The current time , start time and stop
time can be displayed in tensecond
intervals by pressing the time switch
button. The start time or stop time is
always displayed during the timer
operation.

● Display

Operation lamp

This lamp lights during operation,
goes off when the unit stops and
flashes when a malfunction occurs.

display

This lamp lights when electricity is
supplied to the unit.

display

This displays the selected setting
temperature.

display

This displays the air direction.

display

The temperature of the suction air is
displayed during operation. The
display range is 8° to 39°C. The
display flashes 8°C when the actual
temperature is less than 8° and
flashes 39°C when the actual
temperature is greater than 39°C.

display

This display lights in the check mode
or when a test operation is
performed.

CHECK MODE

TEST RUN

display

This lamp lights when the filter need
to be cleaned.

FILTER

display

The selected fan speed is displayed.

5

1. AIR OUTLET

New PCH series models have 1 air outlet (auto vane switching of horizontal air flow / down flow by switched by auto vane)
instead of 2 (horizontal,and down flows).

2. EASY TO CLEAN ; FLOCKLESS VANE

With our original air current control mechanism, a flockless vane is
newly adapted.
The flockless vane prevents the condensation on the vane.
By changing the vane to the flockless type, the unit can be cleaned
much easier with mild household detergent.

3. NEW MATERIALS FOR BETTER OIL RESISTANCE

We have changed the materials of grill, filer, fan and fan casing from ABS to P.P. (polypropylene) for better oil
resistance. As a result, oil crazing is cut in haif.

4. SIMPLIFIED INSTALLATION WORK (DIRECT SUSPENDING METHOD)

Simplified the installation work by changing the suspending method to the direct suspending method (suspending
the unit directly from the suspension fixture).

In this way, the unit can be attached to the suspension fixture without removing the installation parts off (Only the

side cover is removed). This method is much simpler than the “One-time installation method”.

5. IMPROVING EFFICIENCY OF PIPING WORK

1

Removed the knockout work by separating the piping
space from the air outlet for efficiency of the piping work.

w Knockout work is needed for the top part. When

optional drain-up machine is installed, the refrigerant
pipe exits out from the top.

w Please move the rubber plug for the unit to the right joint

when drainage pipe exits from the left side.

2

Improved the flexbility by making it possible for
drainage pipe to exit not only from the right side
back but also from the left side back.

Unifies the air speed
with the vane.

Sending the air to the upper
area of the vane

Prevents the air comes from
cntering from outside the unit

Protruding portion A

Protruding portion B

Flockless vane

Air outlet

B

A

L
G
D

Side panel

open

L : Liquid pipe
G : Gas pipe
D : Drain pipe

Back panel

L

U-cut

G

open

D

Rubber plug

Insulation cover
(attached)

Drain pipe
(purchased locally)

Joint coupliy
(attached)

Drain pan

Insulation
cover

Band
(attached)

6

6. QUITENESS ; 43dB (HIGH NOTCH)

New PCH series has No.1 quietness by changing the air course and the adapting the new shape air outlet.

7. EASY MAINTENANCE ; NO MAINTENANCE NECESSARY FOR 2500 HOURS

The new longlife air filter can be used continuously 2500 hours without maintenance (at general office situation).

8. CHOICE OF FILTER

High performance filter can be purchaced optionally for the special needs.

Auto vane

Swing

Locations Appropriate filter Capability Filter life Maintenance How to attach to the unit

Busy
shops etc...

Regular
office, shops

High performance filter

Standard longlife filter

2500 hour

2500 hour

The filter can
be used again
after cleaning.

The filter can
be used again

after cleaning.

Remove the standard long life
filter before attach this optional
parts.

It is attached to the unit.

Weighing
method 70%

Weighing
method 30%

7

PART NAMES AND FUNCTION

2

● Indoor (Main) Unit

Air outlet

Intake grille

Air intake

Left/right guide vanes

Change the direction of airflow
from the horizontal blower.

Long-life fillter

Removes dust and foreigh matter from air coming in
through the grille (Recommended cleaning interval :
Approx, every 2,500 operating hours)

Up/down guide vanes

Change the direction of airflow from the
vartical blower.

Service Ref.

Power supply

External finish
Heat exchanger

Booster heater
Operation control & Thermostat
Noise level(Low-High)
Cond. drain connection O.D.

Dimensions

Weight

Service Ref.

Power supply

External finish
Refrigerant control
Compressor

Heat exchanger

Defrost method
Crankcase heater
Noise level

Dimensions

Weight
Refrigerant

Pipe size O.D.

Connection method

Between the indoor & outdoor unit

Indoor side
Outdoor side
Height difference
Piping length

Input
Running current
Starting current

Fan(drive))No.
Fan motor output
Airflow(Low-High)
External static pressure

Input
Running current
Starting current

Model
Motor output
Starter type
Protection devices

Fan(drive))No.
Fan motor output
Airflow

Charge

dB(A)
mm,(in)
mm,(in)
mm,(in)
mm,(in)
kg,(lbs)

W

D
H

Function

Total input

Capacity

Cooling

Heating

Upper limit
Lower limit
Upper limit
Lower limit

Indoor
35: DB, 22.5: WB
21: DB, 15.5: WB

27: DB
20: DB

Outdoor

46: DB

-5: DB

21: DB, 15.5: WB

-8.5: DB, -9.5: WB

2. Guaranteed operating range

W

dB(A)
mm,(in)
mm,(in)
mm,(in)
kg,(lbs)

W

D
H

INDOOR UNITOUTDOOR UNIT

REFRIGERANT

PIPING

Item

Service Ref.

Btu/h

W

kW

kW

A
A

kW

A
A

kW

kg,(lbs)

kW

K/min <CFM>

kW

K/min <CFM>

Pa(mmAq)

kW

mm,(in)
mm,(in)

Liquid
Gas

PCH-2GKHA1 PCH-2.5GKHA1

Cooling

18,400

5,400

2.30

0.10

0.43

1.20

0.10 (1.50)

0.43(6.21)

1.20 (6.98)

0.13

0.55

1.27

0.13 (2.23)

0.55 (9.30)

1.27 (10.02)

Heating

21,200 (25,900)

6,200 (7,600)

2.32 (3.72)

Cooling

23,900

7,000

2.59

Heating

24,200 (31,400)

7,100 (9,200)

2.36 (4.46)

PCH-2GKHA

1

Single phase. 50Hz. 220-240V

Munsell 0.70Y 8.59 / 0.97

Plate fin coil

PCH-2.5GKHA

1

Sirocco (direct))2

0.054

10 -13 <353-459>

Sirocco (direct))3

0.07

14 -18 <494-635>

0 (direct blow)

(1.4) (2.1)

Remote controller & built-in

37 - 42 37 - 43

26(1)

1,000 (39-3/8) 1,310 (51-9/16)

680 (26-3/4)

210 (8-1/4)

28.5 (63)

PUH-2VKA

2

36 (79)

PUH-2.5VKA

2

NH38VMD

1.7

NH41VMD

2.0

0.065

45 (1,590)

0.085

50 (1,764)

650 (25-5/8)

64 (141)

850 (33-7/16)

68 (150)

Max. 40m
Max. 40m

Max. 50m
Max. 50m

49 52

2.2 (4.9) 2.8 (6.2)

Single phase. 50Hz. 220-240V

Reverse cycle

38

R-22

870 (34-1/4)

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

Munsell 5Y 7/1

Capillary tube

Hermetic

Line start

Internal thermostat. High-pressure switch

Plate fin coil

Propeller (direct)✕1

2.20

9.86
45

2.22

9.95
45

2.46

10.68
52

2.23

9.78
52

9.52 (3/8)

15.88 (5/8)
Flared
Flared

8

SPECIFICATIONS

3

Rating Conditions (JIS B8616)

Notes1. Rating Conditions (JIS B8616)

Cooling : Indoor : 27:(80

o

F)DB. 19:(66oF)WB

Outdoor : 35:(95

o

F)DB. 24:(75oF)WB

Heating : Indoor : 20:(68

o

F)DB.

Outdoor : 7:(45

o

F)DB. 6:(43oF)WB

Refrigerant piping length (one way) : 5m(16ft)

3. Above data based on indicated voltage
Indoor Unit 1 phase 240V 50Hz
Outdoor Unit 1 phase 240V 50Hz

9

Rating Conditions (JIS B8616)

Service Ref.

Power supply

External finish
Heat exchanger

Booster heater
Operation control & Thermostat
Noise level(Low-High)
Cond. drain connection O.D.

Dimensions

Weight

Service Ref.

Power supply

External finish
Refrigerant control
Compressor

Heat exchanger

Defrost method
Crankcase heater
Noise level

Dimensions

Weight
Refrigerant

Pipe size O.D.

Connection method

Between the indoor & outdoor unit

Indoor side
Outdoor side
Height difference
Piping length

Input
Running current
Starting current

Fan(drive))No.
Fan motor output
Airflow(Low-High)
External static pressure

Input
Running current
Starting current

Model
Motor output
Starter type
Protection devices

Fan(drive))No.
Fan motor output
Airflow

Charge

dB(A)
mm,(in)
mm,(in)
mm,(in)
mm,(in)
kg,(lbs)

W

D
H

Function

Total input

Capacity

Cooling

Heating

Upper limit
Lower limit
Upper limit
Lower limit

Indoor
35: DB, 22.5: WB
21: DB, 15.5: WB

27: DB
20: DB

Outdoor

46: DB

-5: DB

21: DB, 15.5: WB

-8.5: DB, -9.5: WB

2. Guaranteed operating range

W

dB(A)
mm,(in)
mm,(in)
mm,(in)
kg,(lbs)

W

D
H

INDOOR UNITOUTDOOR UNIT

REFRIGERANT

PIPING

Item

Service Ref.

Btu/h

W

kW

kW

A
A

kW

A
A

kW

kg,(lbs)

kW

K/min <CFM>

kW

K/min <CFM>

Pa(mmAq)

kW

mm,(in)
mm,(in)

Liquid
Gas

PCH-3GKHA1 PCH-4GKHSA1

Cooling

25,600

7,500

3.28

0.13

0.55

1.27

0.13 (2.23)

0.55 (9.30)

1.27 (10.02)

0.16

0.70

1.48

0.16 (2.86)

0.70 (11.95)

1.48 (12.73)

Heating

29,000 (36,200)

8,500 (10,600)

3.07 (5.17)

Cooling

34,100
10,000

3.36

Heating
35,700 (44,900)
10,450 (13,150)

3.35(6.05)

PCH-3GKHA

1

Single phase. 50Hz. 220-240V

Munsell 0.70Y 8.59 / 0.97

Plate fin coil

Sirocco (direct) ✕ 3

PCH-4GKHSA

1

0.07

14 -18 <494-635>

0.09

20 -25 <706-883>

0 (direct blow)

(2.1)

210 (8-1/4) 270 (10-5/8)

(2.7)

Remote controller & built-in

37 - 43 40 - 45

26 (1)

1,310 ( 51-9/16 )

680 (26-3/4)

36 (79)

PUH-3VKA

2,PUH-3YKA2

39.5 (87)

PUH-4YKSA

3

NH52VND(PUH-3VKA),NH52YDA(PUH-3YKA)

2.2 / 2.4

NH56YDA

2.7

Propeller (direct) ✕ 1

0.085

50 (1,764)

Propeller (direct) ✕ 2

0.065 + 0.065
95 (3,350)

850 (33-7/16)

75 (165)

1,258 (49-1/2)

94 (207)

Max. 50m
Max. 50m

38
52

38
54

3.2 (7.1)

9.52 (3/8)

15.88 (5/8)

4.2 (9.2)

9.52 (3/8)

19.05 (3/4)

VKA...1phase, 50Hz, 220-240V / YK(S)A...3phase, 50-380Hz, 415V, 4wires

Reverse cycle

R-22

870 <34-1/4>

295 + 24 <11-5/8 add 1>

Munsell 5Y 7/1

Capillary tube

Hermetic

Line start

VKA...Inner thermostat. High-pressure switch YKA...Anti-phase protector, Thermal relay, Thermal switch, High-pressute switch

Plate fin coil

3.15

13.82 / 5.16
58 / 37

2.94

12.89 / 4.81
58 / 37

3.20

5.24
40

3.19

5.22
40

Flared
Flared

Notes1. Rating Conditions (JIS B8616)

Cooling : Indoor : 27:(80

o

F)DB. 19:(66oF)WB

Outdoor : 35:(95

o

F)DB. 24:(75oF)WB

Heating : Indoor : 20:(68

o

F)

Outdoor : 7:(45

o

F)DB. 6:(43oF)WB.

Refrigerant piping length (one way) : 5m(16ft)

3. Above data based on indicated voltage
Indoor Unit 1 phase 240V 50Hz
Outdoor Unit 1 phase 240V 50Hz / 3 phase 415V 50Hz

10

Rating Conditions (JIS B8616)

Service Ref.

Power supply

External finish
Heat exchanger

Booster heater
Operation control & Thermostat
Noise level(Low-High)
Cond. drain connection O.D.

Dimensions

Weight

Service Ref.

Power supply

External finish
Refrigerant control
Compressor

Heat exchanger

Defrost method
Crankcase heater
Noise level

Dimensions

Weight
Refrigerant

Pipe size O.D.

Connection method

Between the indoor & outdoor unit

Indoor side
Outdoor side
Height difference
Piping length

Input
Running current
Starting current

Fan(drive))No.
Fan motor output
Airflow(Low-High)
External static pressure

Input
Running current
Starting current

Model
Motor output
Starter type
Protection devices

Fan(drive))No.
Fan motor output
Airflow

Charge

dB(A)
mm,(in)
mm,(in)
mm,(in)
mm,(in)

kg,(lbs)

W

D
H

Function

Total input

Capacity

Cooling

Heating

Upper limit
Lower limit
Upper limit
Lower limit

Indoor
35: DB, 22.5: WB
21: DB, 15.5: WB

27: DB
20: DB

Outdoor

46: DB

-5: DB

21: DB, 15.5: WB

-8.5: DB, -9.5: WB

2. Guaranteed operating range

W

dB(A)
mm,(in)
mm,(in)
mm,(in)

kg,(lbs)

W

D
H

INDOOR UNITOUTDOOR UNIT

REFRIGERANT

PIPING

Item

Service Ref.

Btu/h

W

kW

kW

A
A

kW

A
A

kW

kg,(lbs)

kW

K/min <CFM>

kW

K/min <CFM>

Pa(mmAq)

kW

mm,(in)
mm,(in)

Liquid
Gas

PCH-5GKHSA1 PCH-6GKHSA1

Cooling

42,300
12,400

4.45

0.24

1.06

2.20

0.24 (3.24)

1.06 (13.56)

2.20 (14.70)

0.24

1.06

2.20

0.24 (3.24)

1.06 (13.56)

2.20 (14.70)

Heating
47,400 (57,700)
13,900 (16,900)

4.40 (7.40)

Cooling

49,500
14,500

4.97

Heating
51,200 (61,400)
15,000 (18,000)

4.82 (7.82)

PCH-5GKHSA

1

Single phase. 50Hz. 220-240V

PCH-6GKHSA

1

Munsell 0.70Y 8.59 / 0.97

Plate fin coil

Sirocco (direct)✕4

0.15

27 -34 <953-1,200>

0 (direct blow)

(3.0)

Remote controller & built-in

41-46 42-48

26 (1)

1,620 (63-3/4)

680 (26-3/4)
270 (10-5/8)

46 (101)

PUH-5YKSA

3

48 (106)

PUH-6YKSA

2

ZR61KC-TFD

3.5

ZR68KC-TFD

4.0

0.085 + 0.085
95 (3,350)

0.10 + 0.10

100 (3,530)

114 (251) 117 (258)

55 56

5.4 (11.9) 5.0 (11.0)

3 phases. 50Hz. 380-415V (4 wires)

Reverse cycle

38

R-22

970 (38-3/16)

345 + 24 (13-9/16 add 1)

1,258 (49-1/2)

Munsell 5Y 7/1

Capillary tube

Hermetic

Line start

Anti-phase protector, Internal thermostat, Thermal switch, High-pressure switch

Plate fin coil

Propeller (direct)✕2

4.21

6.89
53

4.16

6.81
53

4.73

7.74
74

4.58

7.50
74

9.52 (3/8)

19.05 (3/4)
Flared
Flared

Max. 50m
Max. 50m

Notes1. Rating Conditions (JIS B8616)

Cooling : Indoor : 27:(80

o

F)DB. 19:(66oF)WB

Outdoor : 35:(95

o

F)DB. 24:(75oF)WB

Heating : Indoor : 20:(68

o

F)DB.

Outdoor : 7:(45

o

F)DB. 6:(43oF)WB.

Refrigerant piping length (one way) : 5m(16ft)

3. Above data based on indicated voltage
Indoor Unit 1 phase 240V 50Hz
Outdoor Unit 3 phase 415V 50Hz

11

4

DATA

1. PERFORMANCE DATA

1) COOLING CAPACITY

5448
5800
6157
6517
7062
7519
7981
8448
7566
8056
8551

9052
10088
10741
11402
12069
12510
13319
14138
14965
14628
15575
16532
17500

5299
5648
6012
6392
6869
7321
7794
8286
7359
7844
8350
8878

9812
10459
11134
11838
12167
12969
13806
14679
14228
15165
16144
17164

5104
5442
5798
6171
6616
7054
7515
7999
7089
7558
8052
8571

9452
10078
10736
11427
11720
12496
13313
14170
13705
14613
15568
16570

4897
5226
5574
5940
6348
6775
7225
7700
6802
7259
7741
8250
9069

9678
10322
11000
11245
12001
12799
13640
13150
14033
14967
15951

4678
5000
5341
5700
6064
6482
6923
7389
6515
6954
7419
7910
8686
9272

9892
10547
10771
11497
12266
13078
12595
13445
14344
15293

4447
4764
5099
5451
5765
6176
6609
7067
6199
6632
7089
7570
8266
8842

9451
10094
10249
10964
11720
12516
11985
12821
13705
14636

Service Ref.

PCH-2GKHA

1

PCH-2.5GKHA1

PCH-3GKHA1

PCH-4GKHSA1

PCH-5GKHSA1

PCH-6GKHSA1

16
18
20
22
16
18
20
22
16
18
20
22
16
18
20
22
16
18
20
22
16
18
20
22

CA

20 25 30 35 40 45

Outdoor intake air DB!C

Refrigerant piping length (one way)

PCH-2GKHA

1

PCH-2.5GKHA1
PCH-3GKHA1
PCH-4GKHSA1
PCH-5GKHSA1
PCH-6GKHSA1

Service Ref.

5m

1.00

1.00

1.00

1.00

1.00

1.00

10m

0.992

0.989

0.981

0.989

0.981

0.975

15m

0.983

0.980

0.968

0.980

0.968

0.955

20m

0.978

0.970

0.952

0.970

0.952

0.935

25m

0.966

0.960

0.940

0.960

0.940

0.918

30m

0.959

0.950

0.925

0.950

0.925

0.900

35m

0.950

0.940

0.913

0.940

0.913

0.884

40m

0.945

0.930

0.900

0.930

0.900

0.869

45m

—

0.920

0.886

0.920

0.886

0.855

50m

—

0.910

0.874

0.910

0.874

0.840

Indoor
Intake

air

WB!C

P.C.

1.84

1.88

1.92

1.95

2.08

2.12

2.16

2.20

2.63

2.68

2.73

2.78

2.69

2.75

2.80

2.85

3.57

3.64

3.71

3.78

3.98

4.06

4.14

4.22

1.92

1.96

2.00

2.04

2.16

2.21

2.25

2.30

2.74

2.80

2.85

2.91

2.81

2.87

2.92

2.98

3.72

3.79

3.87

3.95

4.15

4.24

4.32

4.41

2.07

2.12

2.16

2.21

2.33

2.38

2.44

2.49

2.95

3.02

3.08

3.15

3.02

3.09

3.16

3.23

4.00

4.10

4.19

4.27

4.47

4.57

4.67

4.77

2.22

2.27

2.33

2.38

2.50

2.56

2.62

2.68

3.16

3.24

3.32

3.40

3.24

3.32

3.40

3.48

4.29

4.40

4.50

4.61

4.79

4.91

5.03

5.15

2.37

2.43

2.49

2.56

2.67

2.73

2.81

2.89

3.38

3.46

3.55

3.65

3.46

3.55

3.64

3.74

4.58

4.70

4.82

4.96

5.12

5.25

5.39

5.54

2.52

2.58

2.66

2.75

2.84

2.91

3.00

3.10

3.59

3.68

3.79

3.92

3.68

3.77

3.89

4.01

4.87

5.00

5.15

5.32

5.44

5.58

5.75

5.94

CA P.C. CA P.C. CA P.C. CA P.C. CA P.C.

Notes CA : Capacity (W)

P.C. : Power consumption (kW)

Cooling cpapacity correction factors

12

2. HEATING CAPACITY

Service Ref.

PCH-2GKHA

1

PCH-2.5GKHA1

PCH-3GKHA1

PCH-4GKHSA1

PCH-5GKHSA1

PCH-6GKHSA1

15
20
25
15
20
25
15
20
25
15
20
25
15
20
25
15
20
25

CA

-10 -5 0 5 10 15

Outdoor intake air WB!C

Refrigerant piping length (one way)

PCH-2GKHA

1

PCH-2.5GKHA1
PCH-3GKHA1
PCH-4GKHSA1
PCH-5GKHSA1
PCH-6GKHSA1

Service Ref.

5m

1.00

1.00

1.00

1.00

1.00

1.00

10m

1.00

1.00

1.00

1.00

1.00

1.00

15m

1.00

1.00

1.00

1.00

1.00

1.00

20m

1.00

1.00

1.00

1.00

1.00

1.00

25m

1.00

1.00

1.00

1.00

1.00

1.00

30m

1.00

1.00

1.00

1.00

1.00

1.00

35m

0.998

0.998

0.998

0.998

0.998

0.998

40m

0.995

0.995

0.995

0.995

0.995

0.995

45m

—

0.993

0.993

0.993

0.993

0.993

50m

—

0.990

0.990

0.990

0.990

0.990

Indoor
Intake

air

DB!C

P.C.

1.58

1.71

1.81

1.61

1.73

1.84

2.09

2.26

2.40

2.29

2.46

2.61

3.00

3.23

3.43

3.29

3.54

3.76

CA P.C. CA P.C. CA P.C. CA P.C. CA P.C.
4246
4066
3907
4862
4656
4474
5821
5574
5356
7156
6852
6585
9519
9115
8759

10272

9836
9453

1.75

1.89

2.01

1.78

1.92

2.04

2.31

2.49

2.66

2.53

2.72

2.90

3.32

3.58

3.81

3.63

3.92

4.17

4866
4675
4485
5573
5354
5136
6671
6409
6149
8202
7880

7560
10910
10481
10056
11773
11311
10851

1.93

2.08

2.22

1.96

2.11

2.26

2.55

2.75

2.94

2.78

3.00

3.20

3.65

3.94

4.21

4.00

4.31

4.61

5546
5337
5125
6351
6112
5869
7604
7317
7027
9348
8996

8639
12434
11966
11491
13418
12912
12400

2.11

2.28

2.44

2.15

2.32

2.48

2.80

3.01

3.23

3.05

3.29

3.52

4.01

4.32

4.63

4.39

4.73

5.07

6285
6051
5827
7198
6929
6673
8617
8296

7989
10594
10199

9821
14091
13566
13064
15206
14640
14098

2.31

2.49

2.67

2.35

2.53

2.72

3.06

3.30

3.53

3.34

3.60

3.86

4.39

4.72

5.07

4.81

5.18

5.55

7082
6816
6590
8110
7806
7546
9710
9345

9034
11937
11488
11107
15878
15281
14774
17135
16491
15943

2.52

2.71

2.91

2.57

2.76

2.96

3.34

3.59

3.85

3.64

3.92

4.21

4.78

5.15

5.52

5.24

5.64

6.05

7936
7632
7413
9088
8740

8489
10880
10463
10163
13376
12863
12495
17792
17110
16620
19200
18464
17935

Notes CA : Capacity (W)

P.C. : Power consumption (kW)

Heating capacity correction factors

13

3. ELECTRICAL DATA

Rating Conditions (JIS B8616)
Indoor

……

220V 50Hz 1phase

Outdoor… 220V 50Hz 1phase / 380V 50Hz 3phase

IndoorOutdoor

Input (kW)
Current (A)
Starting current (A)
Input (kW)
Current (A)
Starting current (A)

Mode
Capacity (W)
Total Input (kW)

Service Ref.

Cooling

5,300

2.20

0.08

0.38

1.10

2.12

9.83
43

Heating

6,100

2.22

0.08

0.38

1.10

2.14

9.93
43

PCH-2GKHA

1

Cooling

6,900

2.52

0.11

0.51

1.17

2.41

11.18
52

Heating

7,000

2.27

0.11

0.51

1.17

2.16

10.02
52

PCH-2.5GKHA

1

Cooling

7,400

3.24

0.11

0.51

1.17

3.13

14.67/5.23
54 / 34

Heating

8,400

3.03

0.11

0.51

1.17

2.92

13.68/4.88
54 / 34

PCH-3GKHA

1

Cooling

9,900

3.31

0.14

0.68

1.36

3.17

5.29
37

Heating

10,350

3.30

0.14

0.68

1.36

3.16

5.28
37

PCH-4GKHSA

1

Cooling

12,200

4.39

0.20

0.96

2.0

4.19

7.32
49

Heating

13,700

4.33

0.20

0.96

2.0

4.13

7.21
49

PCH-5GKHSA

1

Cooling

14,400

4.84

0.20

0.96

2.0

4.64

8.10
68

Heating

14,800

4.76

0.20

0.96

2.0

4.56

7.96
68

PCH-6GKHSA

1

IndoorOutdoor

Input (kW)
Current (A)
Starting current (A)
Input (kW)
Current (A)
Starting current (A)

Mode
Capacity (W)
Total Input (kW)

Service Ref.

Cooling

5,350

2.25

0.09

0.41

1.15

2.16

9.78
44

Heating

6,150

2.27

0.09

0.41

1.15

2.18

9.87
44

PCH-2GKHA

1

Cooling

6,950

2.56

0.12

0.53

1.22

2.44

10.94
52

Heating

7050

2.32

0.12

0.53

1.22

2.20

9.86
52

PCH-2.5GKHA

1

Cooling

7,450

3.26

0.12

0.53

1.22

3.14

14.22 / 5.21
56 / 36

Heating

8,450

3.05

0.12

0.53

1.22

2.93

13.27 /4.86
56 / 36

PCH-3GKHA

1

Cooling

9,950

3.34

0.15

0.69

1.42

3.19

5.23
39

Heating

10,400

3.33

0.15

0.69

1.42

3.18

5.22
39

PCH-4GKHSA

1

Cooling

12,300

4.42

0.22

1.01

2.10

4.20

7.05
51

Heating

13,800

4.37

0.22

1.01

2.10

4.15

6.97
51

PCH-5GKHSA

1

Cooling

14,450

4.91

0.22

1.01

2.10

4.69

7.87
71

Heating

14,900

4.79

0.22

1.01

2.10

4.57

7.67
71

PCH-6GKHSA

1

IndoorOutdoor

Input (kW)
Current (A)
Starting current (A)
Input (kW)
Current (A)
Starting current (A)

Mode
Capacity (W)
Total Input (kW)

Service Ref.

Cooling

5,400

2.30

0.10

0.43

1.20

2.20

9.86
45

Heating

6,200

2.32

0.10

0.43

1.20

2.22

9.95
45

PCH-2GKHA

1

Cooling

7,000

2.59

0.13

0.55

1.27

2.46

10.68
52

Heating

7,100

2.36

0.13

0.55

1.27

2.23

9.78
52

PCH-2.5GKHA

1

Cooling

7,500

3.28

0.13

0.55

1.27

3.15

13.82 / 5.16
58 / 37

Heating

8,500

3.07

0.13

0.55

1.27

2.94

12.89 / 4.81
58 / 37

PCH-3GKHA

1

Cooling

10,000

3.36

0.16

0.70

1.48

3.20

5.24
40

Heating

10,450

3.35

0.16

0.70

1.48

3.19

5.22
40

PCH-4GKHSA

1

Cooling

12,400

4.45

0.24

1.06

2.20

4.21

6.89
53

Heating

13,900

4.40

0.24

1.06

2.20

4.16

6.81
53

PCH-5GKHSA

1

Cooling

14,500

4.97

0.24

1.06

2.20

4.73

7.74
74

Heating

15,000

4.82

0.24

1.06

2.20

4.58

7.50
74

PCH-6GKHSA

1

[7,280]

[3.40]

[8,760]

[4.03]

[10,160]

[4.79]

[12,620]

[5.57]

[16,220]

[6.85]

[17,320]

[7.28]

[7,440]

[3.56]

[7,600]

[3.72]

[9,200]

[4.46]

[10,600]

[5.17]

[13,150]

[6.05]

[16,900]

[7.40]

[18,000]

[7.82]

[8,980]

[4.25]

[10,380]

[4.98]

[12,880]

[5.81]

[16,560]

[7.13]

[17,660]

[7.55]

Indoor

……

230V 50Hz 1phase

Outdoor… 230V 50Hz 1phase / 400V 50Hz 3phase

Indoor

……

240V 50Hz 1phase

Outdoor… 240V 50Hz 1phase / 415V 50Hz 3phase

14

4. STANDARD OPERATION DATA

Rating Conditions (JIS B8616)

Electrical circuit Total Refrigerant circuit

Indoor side

Outdoor

side

Capacity
Input

Indoor unit Service Ref.

Phase, Hz
Volts
Amperes

Outdoor unit

Service Ref.

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

Intake air temperature

Discharge air temperature

Intake air temperature

Mode

Service Ref.

SHF

BF

W

KW

V
A

V
A

Mpa·G(Of/F·G)
Mpa·G(Of/F·G)

!C
!C
!C

m
DB !C
WB !C
DB !C
DB !C
WB !C

Cooling

5,400

2.30

0.43

9.86

1.92

0.47

87
50

3.8
5

27
19

11.5
35
24

0.68

0.11

Heating

6,200

2.32

0.43

9.95

1.90

0.37

89
—

-2.7
5

20
15

44.8
7
6

—
—

PCH-2GKHA

1

PCH-2GKHA

1

1, 50

240

PUH-2VKA

2

1, 50

240

Cooling

7,000

2.59

0.55

10.68

2.05

0.53

85
53

6.9
5

27
19

12.4
35
24

0.69

0.14

Heating

7,100

2.36

0.55

9.78

1.73

0.38

77

—

-2.1
5

20
15

40.4
7
6

—
—

PCH-2.5GKHA

1

PCH-2.5GKHA

1

1, 50

240

PUH-2.5VKA2

1, 50

240

Cooling

7,500

3.28

0.55

13.82/ 5.16

2.04

0.43

87
53

1.6
5

27
19

11.1
35
24

0.66

0.15

Heating

8,500

3.07

0.55

12.89/ 4.81

1.94

0.36

83
—

-2.9
5

20
15

44.8
7
6

—
—

PCH-3GKHA

1

PCH-3GKHA

1

1, 50

240

PUH-3VKA

2

PUH-3YKA2

1/3, 50

240 / 415

Cooling

10,000

3.36

0.70

5.24

1.83

0.50

78
48

6.7
5

27
19

11.1
35
24

0.68

0.12

Heating

10,450

3.35

0.70

5.22

1.72

0.39

75
—

-1.0
5

20
15

42.1
7
6

—
—

PCH-4GKHSA

1

PCH-4GKHSA

1

1, 50

240

PUH-4YKSA3

3, 50

415

Cooling

12,400

4.45

1.06

6.89

1.92

0.48

75
50

4.4
5

27
19

12.4
35
24

0.73

0.07

Heating

13,900

4.40

1.06

6.81

1.78

0.37

70
—

-2.8
5

20
15

42.4
7
6

—
—

PCH-5GKHSA

1

PCH-5GKHSA

1

1, 50

240

PUH-5YKSA3

3, 50

415

Cooling

14,500

4.97

1.06

7.74

1.97

0.45

74
51

2.6
5

27
19

10.0
35
24

0.65

0.14

Heating

15,000

4.82

1.06

7.50

1.80

0.38

69
—

-1.8
5

20
15

44.9
7
6

—
—

PCH-6GKHSA

1

PCH-6GKHSA

1

1, 50

240

PUH-6YKSA2

3, 50

415

[7,600]

[3.72]

[9,200]

[4.46]

[10,600]

[5.17]

[13,150]

[6.05]

[16,900]

[7.40]

[18,000]

[7.82]

(19.6)

(4.8)

(19.4)

(3.77)

(20.9)

(5.4)

(17.6)

(3.87)

(20.8)

(4.39)

(19.8)

(3.67)

(18.7)

(5.1)

(17.5)

(3.98)

(19.6)

(4.90)

(18.1)

(3.77)

(20.1)

(4.59)

(18.4)

(3.88)

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·G)=10.2(

O

Of/F

·G)

15

5

1. INDOOR UNIT
PCH-2GKHA

1

180

210

157

15

85

182 (3/8F) liquid

201 (5/8F) gas

241 (Drainage)

Air intake

918

254

680

Electrical box

226

70

525

928

352

263

171

138

86

46 175

131

38

3879

161

32

179

42

6~7

Celling

Electrical box

[Front view]

When electrical

box is pulled

down

3

2

8

5

1

4

6

2

7

17

150

140

70

320

80

933 (suspension bolt pitch)

983

1000

Air outlet

81

904

76

1 Drainage pipe connection (26mm I.D.) 5 Refrigerant-pipe connection (liquid pipe side/flared connection)

2 Drainage pipe connection (for the left arrangement) 6 Knock out hole for upper drain pipe arrangement

3 Knock out hole for left drain-piping arrangement 7 Knock out hole for left drain pipe arrangement

4 Refrigerant-pipe connection (gas pipe side/flared connection) 8 Knock out hole for wining arrangement

NOTES:

1. Use M10 or W3/8 screws for anchor bolt.

2. Please be sure when installing the drain-up machine (option parts).

refrigerant pipe will be only upper drain pipe arrangement.

OUTLINES AND DIMENSIONS

16

PCH-2.5GKHA1
PCH-3GKHA1

1240 (suspension bolt pitch)

140

150

320 80

17

70

6

1290

1214

210
180

81 76

1310

Air outlet

1228

680

254

Air intake

85

182

201

241

15

157

(3/8F liquid)

(5/8F gas)

(Drainage)

3

2

8

5

1

4

Electrical box

When electrical

box is pulled

down

[ Front view ]

Celling

32

179

161

38

3879

42

6~7

525

1235

416

263

171

138

86

131

175 1

46

7

2

Electrical box

70

226

1 Drainage pipe connection (26mm I.D.) 5 Refrigerant-pipe connection (liquid pipe side/flared connection)

2 Drainage pipe connection (for the left arrangement) 6 Knock out hole for upper drain pipe arrangement

3 Knock out hole for left drain-piping arrangement 7 Knock out hole for left drain pipe arrangement

4 Refrigerant-pipe connection (gas pipe side/flared connection) 8 Knock out hole for wining arrangement

NOTES:

1. Use M10 or W3/8 screws for anchor bolt.

2. Please be sure when installing the drain-up machine (option parts).

refrigerant pipe will be only upper drain pipe arrangement.

17

PCH-4GKHSA1

1 Drainage pipe connection (26mm I.D.) 5 Refrigerant-pipe connection (liquid pipe side/flared connection)

2 Drainage pipe connection (for the left arrangement) 6 Knock out hole for upper drain pipe arrangement

3 Knock out hole for left drain-piping arrangement 7 Knock out hole for left drain pipe arrangement

4 Refrigerant-pipe connection (gas pipe side/flared connection) 8 Knock out hole for wining arrangement

NOTES:

1. Use M10 or W3/8 screws for anchor bolt.

2. Please be sure when installing the drain-up machine (option parts).

refrigerant pipe will be only upper drain pipe arrangement.

6

(3/8F liquid)

(5/8F-gas)

(Drainage)

182

245

87

16

320 80

70

140

150

17

217

270

207

680

81 96

254

1

4

1

5

8

Celling

[ Front view ]

93

Electrical box

236

192

38 140

160

1310

1214

1240 (suspension bolt pitch)

45

Air outlet

86

138

171

263

38

687

1235

70

2

229

1228

Air intake

7

525

6~7

Electrical box

2

3

42 239

When electrical

box is pulled

down

18

1535

680

254

Air intake

1524

270

207

81 96

1620

Air outlet

1547(suspension bolt pitch)

140

150

320 80

18

70

6

87

182

198

245

16

217

(3/8F liquid)

(3/4F gas)

(Drainage)

3

2

8

5

1

4

Electrical box

When electrical

box is pulled

down

[ Front view ]

Celling

93

160

38

38 140

42 239

6~7

525

1545

687

263

171

138

86

192

236

1

45

7

2

Electrical box

70

229

PCH-5GKHSA1
PCH-6GKHSA1

1 Drainage pipe connection (26mm I.D.) 5 Refrigerant-pipe connection (liquid pipe side/flared connection)

2 Drainage pipe connection (for the left arrangement) 6 Knock out hole for upper drain pipe arrangement

3 Knock out hole for left drain-piping arrangement 7 Knock out hole for left drain pipe arrangement

4 Refrigerant-pipe connection (gas pipe side/flared connection) 8 Knock out hole for wining arrangement

NOTES:

1. Use M10 or W3/8 screws for anchor bolt.

2. Please be sure when installing the drain-up machine (option parts).

refrigerant pipe will be only upper drain pipe arrangement.

19

2. REMOTE CONTROLLER Unit : mm(inch)

18

130

Rear side wiring arrangement opening.

120

FILTER

CHECK MODE

TEST RUN

FILTER

CHECK MODE

TEST RUN

46

83.5

SW18

SW17

CAUTION

20

WIRING DIAGRAM

6

PCH-2GKHA1/PCH-2.5GKHA1/PCH-3GKHA1
PCH-4GKHSA1/PCH-5GKHSA1/PCH-6GKHSA1

240V

230V

220V

230V

220V

YELLOW
ORANGE
RED

1

ON
OFF

2

3 4

1

ON
OFF

2

3 4

[Emergency operation procedure]
(2) Turn on the outdoor unit side circuit breaker, then indoor unit side circuit breaker in this order.
(3) During emergency operation indoor fan runs at high speed but automatic vane remains stop.
(4) If vane closed, open the vane by hand slowly.
(5) Thermostat will not function. Cold air belows out for defrosting during heating thus do not operate defrosting for a long time.
(6) Emergency cooling should be limited to 10 hours maximum.

(The indoor unit heat exchanger may freeze).

(7) If the microcomputer doctor detects the abnormality of the drain-up machine during cooling mode, do not execute emergency

operation.(If causes drain overflow)

NOTES :

1. Since the indoor fan motor (MF 1.2) is connected with
230~240V power. IF 220V power is used. change the dip
switch (SWS<1.B>)on the indoor controller board showing
fig:w1.

2. Since the indoor transformer (T)is connected with
240Vpower.if 220.230V power is used. Change the wiring
connection showing fig:w2.

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

4. Indoor and outdoor connecting wires are made with polarities. make wiring matching terminal numbers.

5. Symbols used in wiring diagram above are.
: Connector,

/

/

: Terminal block.

6. Emergency operation

If remote controller or microcomputer fails but there is no other truble. emergency operation is possible by setting dip switch
(SW3<I.B>) on the indoor controller board.

[Check items]
(1)Make sure that no other trouble exist the outdoor unit. Trouble with the outdoor unit prevents emergency operation.

(If any trouble exists the outdoor unit error code “P8”will be displayed on the remote controller and the trouble position will be shown
on the outdoor controller LED. See electric wiring diagram of the outdoor unit for details.)

(2)Make sure that there is no trouble with the indoor fan.

Emergency operation will be continuous operation mode due to power ON/OFF (ON/OFF with the remote controller is not possible).

[Emergency operation procedure]
(1)Set the dip switch (SW3<I.B>) on the indoor controller board to on and off for cooling and - on for heating.

2121

fig:w1

Indoor fan motor (MF) for

fig:w2

When power supply is

SYMBOL

C

NAME

FAN MOTOR CAPACITOR

CN1<R.B>

PROGRAM TIMER CONNECTOR

CN2<R.B>

REMOTE SWITCH CONNECTOR

CN2L<I.B>

LOSSNAY CONNECTOR

CNP<I.B>

DRAIN-UP MACHINE CONNECTOR

CN50<I.B>

DRAIN SENSOR CONNECTOR

CN51<I.B>

CENTRALLY CONTROL CONNECTOR

F1,2<I.B>

FUSE(6.3A 250V)

FS1,2

H

HEATER
I.B
J1<I.B>
J5<I.B>

INDOOR CONTROLLER BOARD

FUNCTION SELECTOR JUMPER RESISTORS

MODEL SELECTOR JUMPER RESISTORS

SYMBOL

J9<I.B>

NAME

MODEL SELECTOR JUMPER RESISTORS

LED1<I.B>

DC 12V POWER LED

LED2<I.B>

DC 5V POWER LED

MF

FAN MOTOR
VANE MOTOR

REMOTE CONTROLLER BOARD
ROOM TEMPERATURE THERMISTOR

(0

:/15k", 25:/5.4k" DETECT)

INDOOR COIL THERMISTOR
(0:/15k", 25:/5.4k" DETECT)
ADDRESS SELECTOR
EMERGENCY OPERATION SWITCH
TWIN/TRIPLE SELECTOR
MODEL SELECTOR

SYMBOL

SW17<R.B>

NAME

ADDRESS SELECTOR

SW18<R.B>

FUNCTION SELECTOR

T

TRANSFORMER

TB2

POWER SUPPLY TERMINAL BLOCK
INDOOR/OUTDOOR CONNECTING WIRE TERMINAL BLOCK

REMOTE CONTROLLER

TERMINAL BLOCK

LINE TRANSMISSION
FAN MOTOR RELAY

VARISTOR
HEATER THERMAL SWITCH
HEATER CONTACTOR
OPTION DRAIN-UP MACHINE
OPTION DRAIN-UP SENSOR

THERMAL FUSE(98:10A:2GKHA / 117:16A:
4GKHA110

:16A:2.5,3GKHA.5.6GKHSA)

MV
R.B
RT1

RT2

SW2<I.B>
SW3<I.B>
SW6<I.B>
SW7<I.B>

TB4
TB5,6

X4<I.B>
ZNR
26H
88H
DP
DS

I.B

OFF

MF

C

WHT

BLK

RED

FAN1

135

X4

X4

SW2

123456

J5

2

42

ON

DP

CNP

D.U.M

ZNR

J9

13

(OPTION)

31

POWER

SW6

1234

CND

F2 F1

1234

BLU

RED

3

LED1 12V
POWER

SW3SW7

ON

OFF

12

J1

456 97108

RED

YLW

WHT

13

ORN

CNT

TRANS

LED2 5V
POWER

HEATER

220V
230V
240V

YLW

CN24

T

6

CN6V

VAN E

1

POWER

CENTRALLY

CONTROL

CN51

DRAIN

CN50

10VAC

14.3VAC
6

RED

RED

43211

REMOCON

CN40

1234

CN21

CN20

5

INTAKE

1234

BRN

BRN

TO

REMOCON

OUTDOOR

PIPE

LOSSNAY

GRN/YLW

CN4T

TRANS

CN22

CN30

12

12

CN2L

TB2

6

MV

BLU
BLU

12

BRN
ORN
YLW

123

BLK
BLK

12

RT1

L

POWER SUPPLY

N

~

(1 PHASE)
AC220-240V 50Hz
AC220V 60Hz

INDOOR UNIT

REMOTE CONTROLLER

TRANSMISSION WIRES

TB5

DC12V

2
1

OUTDOOR UNIT

TB4

3

TO OUTDOOR UNIT

2

CONNECTING WIRES

1

DC12V

RT2

54

GRY

DRAIN

CN50

3

BLK

2
1

DS(OPTION)

MODELS

SW7

MODELS

SW7

L
N

ON
OFF

1234

OFF

1234

RED

RED
BLU

TB2

I.B

HEATER

CN24

2
1

PCH-2~6GKH(S)A (with heater)

3GK(H)

2.5GK(H)2GK(H)
ON

OFF

1234

1234

6GK(H)5GK(H)4GK(H)

ONON
OFF

1234

1234

88H

RED

35

BLU

YLW
YLW

6

88H

R.B

SW17

ON
OFF

87654321

ON
OFF

FS2

FS1

21

RED

6

GRY

5

1

RED

SW18

TB6

OFF
ON

OFF
ON

CN1

54 12

CN2

312

4321

BG79Y189H03-A

H

26H

B.2A.1

3

21

7

REFRIGERANT SYSTEM DIAGRAM

Indoor unit

Indoor
heat
exchanger

Refrigerant pipe
(option)

15.88

mm( 5/8")

(with heat insulator)

Flexible tube

Ball valve

Strainer

4-way valve

Oil separator

Service
port

Service
port

High pressure
control switch

Outdoor unit

Outdoor heat exchanger

Outdoor
coil
thermistor

(RT)

Capillary
tube

Restrictor
valve

Strainer

Bypass
valve

Compressor

Accumulator

Ball valve
(with service port)

Refrigerant pipe
(option)

9.52

mm( 3/8")

(with heat insulator)

Capillary
tube

Restrictor
valve

Distributor
with
strainer

Indoor coil
thermistor
RT2

Indoor coil
thermistor
RT2

Indoor coil
thermistor
RT2

Strainer

Flared
connection

<R.V.coil>
Heating ON
Cooling OFF

PCH-2(O.D.3.2 ✕ I.D.1.6-R230)
PCH-2.5(O.D.3.2 ✕ I.D.1.8-R430)
PCH-3(O.D.4.0 ✕ I.D.2.0-R280)

Indoor unit

Indoor
heat
exchanger

Refrigerant pipe
(option)

19.05

mm( 3/4)

(with heat insulator)

Flexible tube

Ball valve

Strainer

4-way valve

Oil separator

Service
port

Service
port

High pressure
control switch

Outdoor unit

Outdoor heat exchanger

Capillary
tube

Restrictor
valve

Strainer

Bypass
valve

Compressor

Accumulator

Ball valve
(with service port)

Refrigerant pipe
(option)

9.52

mm( 3/8")

(with heat insulator)

Capillary
tube

Restrictor
valve

Distributor
with
strainer

Strainer

Flared
connection

(O.D.3.2 ✕ I.D.2.0-R820) ✕ 2

(O.D.4.0 ✕ I.D.2.0-R350)

Thermal switch

Indoor unit

Indoor
heat
exchanger

Refrigerant pipe
(option)

19.05

mm( 3/4")

(with heat insulator)

Flexible tube

Ball valve

Strainer

4-way valve

Oil
separator

Service
port

Service
port

High pressure
control switch

Outdoor unit

Outdoor heat exchanger

Capillary
tube

Restrictor
valve

Strainer

Bypass
valve

Compressor

Accumulator

Ball valve
(with service port)

Refrigerant pipe
(option)

9.52

mm( 3/8")

(with heat insulator)

Capillary
tube

Distributor
with
strainer

Strainer

Flared
connection

PCH-5 O.D.4.0 ✕ I.D.2.4-R270

Capillary tube

PUH-5 (O.D.4.0 ✕ I.D.2.4-R840)✕ 2
PUH-6 (O.D.4.0 ✕ I.D.2.4-R1200)✕ 2

PCH-6 O.D.4.0 ✕ I.D.3.0-R300

Restrictor valve

Refrigerant flow in cooling
Refrigerant flow in heating

Unit : mm

PCH-2(O.D.4.0 ✕ I.D.2.0-R430)
PCH-2.5(O.D.4.0 ✕ I.D.2.4-R1550)
PCH-3(O.D.4.0 ✕ I.D.2.4-R1070)

Outdoor
coil
thermistor

(RT)

Outdoor
coil
thermistor

(RT)

PCH-2GKHA1/PUH-2VKA2
PCH-2.5GKHA1/PUH-2.5VKA2
PCH-3GKHA1/PUH-3VKA2,PUH-3YKA2

PCH-4GKHSA1/PUH-4YKSA3

PCH-5GKHSA1/PUH-5YKSA3
PCH-6GKHSA1/PUH-6YKSA2

22

OPERATION FLOW-CHART

8

START

Power circuit

breaker

Check SW

ON twice

Operation SW

ON

“OFF” timer

“ON” timer

STOP

Set time
complete

Set time

complete

1

NO

NO

NO NO

NO

NO

NO

NO

NO

NO

NO

NO

YES

w1

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

PROTECTION DEVICE

SELF HOLD RELEASE

Remote controller

indicator lamp OFF

Trouble STOP

Remote controller

operation display

Operating mode

(COOL)

Operating mode

(DRY)

Operating mode

(HEAT)

Operating mode

(FAN)

Auto COOL/HEAT

operation

COOL operation

DRY operation

HEAT operation

FAN operation

Trouble

PROTECTION DEVICE

SELF HOLD

Remote controller

trouble display

Indoor side

Outdoor side

Fan STOP

Auxiliary heater OFF

Compressor OFF

Fan STOP

Four-way valve OFF

w2

w3

w6

w4

w5

w7

MAIN OPERATION

w1 In addition, the centralized control and remote control can be operated.
w2 The modes which indicate the sources of trouble are listed below.

● EO-Signal transmitting/receiving error

● P1-Room temperature thermistor malfunction

● P2-Indoor coil thermistor malfanction

● P4-Drain sensor malfunction

● P5-Drain overflow

● P6-Coil frost/overheat protection

● P7-System error

● P8-Outdoor unit trouble

w3 The CHECK swich will show if an error has occurred in the past.
w4 Fan runs on low speed for 1 minute in order to remove overheat air.
w5 The 3-minute (6 minutes …heating mode) time-delay functions after compressor stops.
w6 FAN or AUTO mode is selected by the indoor dipswitch setting.
w7 In FAN mode, fan speed and vane operation depend on the remote controller setting. (Compressor is OFF.)

23

COOLING OPERATION

w8 When operation stops or changes to cooling or dry mode, the auto vane turns to a horizontal angle. If operation

changes during auto vane SWING, the auto vane will continue to swing.

w9 When operating TEST RUN, the thermostat will be continuously ON.

w10 After 3 minute compressor operation, if the indoor coil thermistor reads -15°C or below for 3 minutes, the compressor

will stop for 6 minutes.

w11 Cooling area : Indoor coil temperature is more than 5 degrees above the room temperature.

Heating area : Indoor coil temperature is more than 5 degrees below the room temperature.
FAN area : Indoor coil temperature is within 5 degrees either way of the room temperature.

COOL operation

Four-way valve/OFF

NO

NO

NO

NO

Vane setting notch

Initial

COOLING

w8

Downward discharge

Vane horizontal

w9

YES

Vane intial

setting

Vane
40 deg downward angle
60 deg downward angle

YES

Fan speed

LOW

YES

1 hour

YES

airflow

NO

Compressor

thermostat

ON

Allowance

cancel

NO

YES

NO

YES

YES

NO

w10

w11

3-minute
time delay

NO

6-minute

time delay

NO

3-minute

compressor operation

YES

Coil frost

prevention

NO

Cooling area

YES

NO

Allowance

period

NO

6 minute

time delay

Allowance set

YES

Coil frost protection

YES

NO

NO

10-minute

compressor operation

YES

Allowance cancel

Coil frost
protection

NO

16-minute

compressor operation

YES

Indoor pipe

temperature is

1!C or lower

NO

Compressor ON

1

YES

YES

Coil frost

prevention

Compressor OFF

Indoor coil
tempreature is
10!C or higher

3-minute

time delay

Coil frost

prevention release

NO

YES

NO

1 min continue

FAN speed

YES

LOW

FAN speed
LOW 5 min

elapse

NO

YES

Outdoor unit

trouble

24

Heat operation

Initial

HEATING

Vane setting notch

Vane initial setting

Defrosting

Heating area

Defrost release

Defrost

30 min. elapse

Outdoor unit trouble

Four-way valve ON

Hor adjust
in process

Compressor ON

Compressor

thermostat ON

Allowance cancel

Indoor piping

-15!C or lower

Outdoor unit

trouble

FAN SPEED

Very low airflow

Compressor OFF

1

3 min.restart

prevention

6 min. restart

prevention

2

A

B

B

A

1

2

1

Hot adjust start

FAN SPEED very low

Compressor ON

10-minute
compressor

operation

Allowance cancel

Heating

area

FAN STOP

Airflow area

20 min.elaspe

Airflow area

Heating area

Outdoor unit

trouble

Airflow area
Cooling area

Defrost operation

START

Four-way valve

OFF

Indoor piping
55!C or lower

Auxiliary heater

ON

Indoor piping
60!C or higher

Auxiliary heater OFF

Overheat remote

START

Indoor unit

70!C or higher

Allowance

period

Overload protect

Auxiliary heater

thermostat ON

Auxiliary heater ON

6-minute restart

prevention

Allowance set

Compressor OFF

Indoor piping
35!C or higher

HOT adjust

6 min. elapse

FAN SPEED

Low

FAN SPEED

Low 2 min.

elapse

FAN SPEED

setting nitch

Hot adjust

release

PCH-GKH(S)A

Type

3-minute

Auxiliary heater

OFF

Indoor coil

thermistor is 60!C

or higher

FAN speed

Low notti

Airflow 10% up

FAN setting notch

Auto COOL/HEAT

operation

Initial mode

T

1 T0

>
=

COOL mode HEAT mode

COOL mode

T

1 < (T0 - 2)

After 15min.

T

1

<(T0-2)

COOL operation HEAT operation

11

T

1>(T0 + 2)

After 15min.

T

1

>(T0 + 2)

HEAT operation

Cool mode

set

NO

NO

NO

NO

NO

NO

NO

YES YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

w17

w16

w11

w10

w11

w11

w9

w15

11

HEATING OPERATION

AUTOMATIC COOLING/HEATING OPERATION

w15 ( i ) Until Low airflow is set while in hot adjustment

(ii)While defrosting (FAN STOP)
(iii)When thermostat is OFF

In the case of( i ), (ii) and (iii) above, airflow is horizontal regardless the VANE setting.

w16 When AUTO operation is started, COOL or HEAT mode is selected automatically.
w17 T1 : Room temperature.

To : Set temperature

25

w8—9 Refer to page 31~32.
w12 When room temperature is 18°C or below, the compressor cannot operate.

When room temperature rises over 18°C, the compressor starts after a 3-minute time delay.

w13 Compressor ON time is decided by room temperature. Refer to page 31~32.
w14 In dry operation, compressor ON makes the fan speed LOW and compressor OFF stops the fan.

It is not possible to set the fan speed with the remote controller.

DRY OPERATION

DRY

operation

Four-way valve / OFF

Initial dry
operation

Room tempereature is

18°C or lower

During

compressor ON

Compressor &
thermostat ON

Vane initial setting

Vane

setting notch

10-minute compressor

OFF timer start

Compressor OFF

Fan STOP

3-minute

time delay

10-minute

compressor

OFF

Compressor ON

time set

Compressor ON

Fan speed LOW

1

Compressor &

thermostat

ON

3-minute

compressor

operation

Compressor ON

time completes

NO

YES

NO

NO

YES

w14

w14

w13

YES

YES

NO

YES

NO

NO

w9

YES

YES

w9

NO

NO

w12

YES

NO

YES

w8

26

MICROPROCESSOR CONTROL

9

● Compressor and
outdoor fan : ON­OFF

● Operation mode
change :COOL­HEAT.

1.OUTLINE OF MICROPROCESSOR CONTROL

● OFF-ON switching.

● COOL/DRY-AUTO-HEAT selector switching.

● Thermostat setting.

● TIMER mode selector-switching and Timer

setting.

● HIGH-LOW fan speed switching.

● AUTO Vane selector (AIR DISCHARGE)

switching.

● TEST RUN switching.

● CHECK mode switching.

(Self diagnostic trouble shooting)

● Room temperature thermistor (RT1)

● Indoor coil thermistor (RT2)

● Drain sensor

● Autovane’s angle setting.

● Booster heater ON-OFF Control.

● Drain pump : ON-OFF.

● Emergency stop.

● Compressor protection

device working

● Defrosting
START-STOP

● Fan speed control.

● Crankcase heater control

ON-OFF.

● Self diagnostic function

Independent Control of
Outdoor Unit

OUTPUT to indoor unit

INPUT from indoor unit

INPUT to remote controller

Remote controller board

● Processes and transmits
orders.orders.

OUTPUT to remote controller

Indoor controller board

● Receives orders from remote controller and
temperature data from indoor unit.

● Processes orders and data.

● Controls indoor and outdoor operation.

● Self diagnostic function.

w System control operation.
w Emergency operation.
w Set by dipswitch on indoor controller board.

● Transmits the power to remote controller.

OUTPUT to outdoor unit

12VDC

Non-polar, two-wire cable
maximum length 500 meters

Signal

Remote controller

● LCD indicator

Polar three-wire cable

12VDC

123

1
2
3

Indoor
unit

Outdoor unit

FILTER

CHECK MODE

TEST RUN

4

27

2. INDOOR UNIT CONTROL

2-1COOL operation

(1) Compressor control

1 3-minute time delay

To prevent overload, the compressor will not start within 3 minutes after stop.

2 The compressor runs when room temperature is higher than set temperature.

The compressor stops when room temperature is equal to or lower than the set temperature.

3 The compressor stops in check mode or during protective functions.
4 Coil frost prevention

To prevent indoor coil frost, the compressor will stop when the indoor coil thermistor (RT2) reads 1°C or below after the
compressor has been continuously operated for at least 16 minutes or more. When the indoor coil temperature rises to
10°C or above, the compressor will start after a 3-minute time delay.
NOTE : By cut off the J-5 (Jumper resistance)on indoor controller board, the start temperature of coil frost prevention

changes from 1°C to -3°C.

<How to operate>

1 Press POWER ON/OFF button.
2

Press the a button to display “f”.

3

Press the i TEMP button to set the desired temperature.
NOTE: Set temperature changes 1°C when the or

button is pressed one time.
Cooling 19°C to 30°C

Minimum 3 minutes w1

ON

Thermostat

Indoor fan

Auto vane

Booster heater

Drain pump
(OPTIONAL)

Compressor

ON

ON

LOW or HIGH

Initially horizontal

(Changeable by remote controller setting)

LOW or HIGH

ON

OFF

OFF

30!
discharge
position

3 minutes

OFF

OFF

ON

OFF

OFF

Operation starts by
POWER button
ON.

Operation stops by
POWER button
OFF.

Room temperature
becomes equal to
set temperature.

Room temperature
rises above set
temperature.

discharge
position

30!

<COOL operation time chart>

w1 Even if the room temperature rise above the set temperature during this period, the compressor will not start until this period has ended.

FILTER

CHECK MODE

TEST RUN

4

28

5 Coil frost protection

When indoor coil temperatuer becomes -15°C or below,coil frost protection will proceed as follows.

<Start condition>

After the compressor has been continuously operated for 3 minutes or more,and the indoor coil temperature has been ­15° or below for 3 minutes,the coil frost protection will start.

<Coil frost protection>

Compressor stops for 6 minutes,and then restarts.
lf the start condition is satisfied again during the first 10 minutes of compressor operation, both the indoor and outdoor
units stop,displaying a check code of“P6”on the remote controller.

<Termination conditions>

Coil frost protection is released when the start condition is not satisfied again during the allowance, or when the COOL
mode stops or changes to another mode.

(2) Indoor fan control

Indoor fan speed LOW/HIGH depends on the remote controller setting.
However, if an outdoor unit abnormality is detected, the indoor fan speed will be LOW, regardless of the remote controller

setting.

When the outdoor unit abnormality detection is released and the fan speed returns to the set speed, the quiet cycle control

will work.

(a) Normal control

( i ) Fan speed LOW/HIGH depends on the remote controller setting regardless of the thermostat ON/OFF.
(ii) Fan speed will remain on LOW if an abnormality in outdoor unit is detected. (5 minutes)

When the abnormality detection is released, the fan speed returns to the set speed.

1 Start-up of outdoor unit abnormality

detection.

2 Release of outdoor unit abnormality

detection.

3 Unit stop due to outdoor unit abnormality

with P8 indication.

NOTE 1 : Fan stops immediately if the unit stops or the check mode is started.

5 minutes

SET

LOW

5 minutes

SET

LOW

OFF

29

(3) Auto vane control

Auto vane position is set to horizontal airflow at the start-up of COOL operation. It can then be changed by the remote
controller.

(a) Stop mode (fixed operation)
( i ) At start-up of COOL operation, the auto vane is set to 30 degrees airflow direction.
( ii ) Discharge direction can be changed with botton.

w Vane angle can be change to upper angle by cutting off the J5-3.(Jumper resistance of indoor units)

(b) SWING mode.

( i ) The vane motor turns ON when the SWING mode is selected.

The vane motor is continuously ON during SWING mode.

When 40° degrees or 60° degrees airflow is selected with the LOW fan speed in COOL operation, “AUTO RETURN” will
appear below the temperature display. One hour later, the airflow direction returns to horizontal automatically and “AUTO
RETURN” will disappear. If the airflow direction is set to horizontal during “AUTO RETURN” indication, the time counting
for AUTO RETURN is cancelled.

1 Fan speed : LOW

2 Fan speed : HIGH

Horizontal

40°

60°

Horizontal

40°

60°

SWING

SWING

20°

holizontal

holizontal

40

20

60

AUTO RETURN AUTO RETURN

40

60

<AUTO RETURN>

1 Fan speed : LOW

2 Fan speed : HIGH

30

<Auto vane drive>
(a) The auto vane is driven by DC12V motor.
(b) Airflow direction is selected depends on the number of pulse were sended.

(c) Before start driving the auto vane, detect the standard position first, output the number of pulse to each airflow.
(d) The speed of the auto vane drive for both open and close are setted at 200 pulse/sec.
(d) Method of driving the auto vane.

1 Detecting the standard position :

Output 1448 (PCH-2~3),1498 (PCH-4~6)

2 Position setting :

Output the number of pulse indicated no below chart to the closing direction.

(4) Detecting abnormalities in the outdoor unit

After the compressor has been continuously operated for 3 minutes, if the difference between the indoor coil temperature
and room temperature is out of RANGE C for 1 minute, the indoor fan speed will turn to LOW. Five minutes later, if the
difference is still out of RANGE C,the outdoor unit is functioning abnormally. Thus, the compressor stops and check code
“P8” appears on remote controler.
RANGE A : Indoor coil temperature is more than 5 degrees above room temperature.
RANGE B : Indoor coil temperature is within 5 degrees either way of room temperature.
RANGE C : Indoor coil temperature is more than 5 degrees below room tempetature.

Indoor coil temperature
minus room temperature.

+5

0

-5

RANGE A

RANGE B

RANGE C

(degree)

(5) Drain pump control (OPTION)

The drain pump works in COOL or DRY operation. When operation stops or changes to HEAT mode, the drain pump

continues to operate for 3 more minutes. The drain pump does not work in check mode.

<Drain sensor>

When both the drain pump and unit are operating, the drain sensor detects the temperature. This temperature tells

whether the drain water level is above or under the drain sensor. If the drain water level rises above the drain sensor due

to a drain pump malfunction, the unit will stop operating in order to prevent drain from overflowing. The check code “P5” on

the remote controller will display this occurrence. When either of the following conditions are satisfied, the drain sensor is

determined to be under water.

● Though the drain sensor has been heated by the drain sensor heater for more than 40 seconds, its temperature rise is

less than 20 degrees.

● The drain sensor temperature is below 63°C.

The number of pulse outputed after

directing the standard position

Close

Horizontal
Downward A
Downward B

Downward C

PCH-2~3

1448

247
435
624
813

PCH-4~6

1498

318
511
693
817

31

<DRY operation time chart>

ON

Thermostat

Indoor fan

Auto vane

Drain pump
(OPTIONAL)

Compressor

ON

ON

Low speed

LOW speed

ON

OFF

OFF

3 minutes

OFF

OFF

Booster heater

ON

OFF

OFF

Operation starts by
POWER button
ON.

Operation stops by
POWER button
OFF.

Room temperature
becomes equal to
set temperature.

Room temperature
rises above set
temperature.

Initally 35degrees (SW5-3:OFF) or 20degrees (SW5-3:ON) discharge

(Changeable by remote controller setting)

close

close

Minimum 3 minutes w1

w1 Even if the room temperature rises above the set temperature during this period, the compressor will not start until this period has ended.

2-2 DRY operation

(1) Compressor control

13-minute time delay

To prevent overload, the compressor will not start within 3 minutes after stop.

2The compressor runs when the room temperature is higher than the set temperature.

The compressor stops when the room temperature is equal to or lower than the set temperature.

3The compressor stops in check mode or during protective functions.

FILTER

CHECK MODE

TEST RUN

4

<How to operate>

1 Press POWER ON/OFF button.
2 Press the a button to display “ e ”.
3 Press the i TEMP button to set the desired temperature.

NOTE: The set temperature changes 1°C when the or

button is pressed one time.
Dry 19°C to 30°C.

32

4The compressor will not start when the room temperature is below 18:.

The compressor start intermittent operation when the power is turned ON with room temperature above 18;. The compres
sor ON/OFF time depends on the themostat ON/OFF and the following room temperature.

After 3-minute compressor operation.

●If the room temperature thermistor reads above 28: with themostat ON, the compressor will operate for 6 more minutes
and then stop for 3 minutes.

●If the room temperature thermistor reads above 26: ~ 28: with themostat ON, the compressor will operate for 4 more min
utes and then stop for 3 minutes.

●If the room temperature thermistor reads above 24: ~ 26: with themostat ON, the compressor will operate for 2 more min

utes and then stop for 3 minutes.

●If the room temperature thermistor reads below 24: with themostat ON, the compressor will stop for 3 minutes.

●If the thermistat is OFF regaedless of room temperatere, the compressor will stop for 10 minutes.

5Coil frost protection

Coil frost protection in DRY operation is the same as in COOL operation.

6Coil frost protection

Coil frost protection does not operate in DRY operation.

(2) Indoor fan control

The indoor fan runs on LOW speed during compressor operation. The fan speed cannot be changed with the remote
controller. Also, the indoor fan does not run during compressor OFF.

(3) Auto vane & drain pump controls

Same as in COOL operation.

(4) Detecting abnormalities in the outdoor unit

An abnormality in the outdoor unit can not be detected in DRY operation.

33

<HEAT operation time chart>

ON

Thermostat

Indoor fan

Auto vane

Drain pump
(OPTINAL)

Compressor

ON

ON

LOW or HIGH

LOW

or HIGH

ON

OFF

OFF

OFF

OFF

OFF

Power ON lamp

ON

OFF

STAND BY lamp

ON

OFF

Booster heater

ON

OFF

Operation starts by
POWER button
ON.

Operation stops by
POWER button
OFF.

Room temperature
becomes equal to
set temperature.

Room temperature
rises above set
temperature.

close

close

Horizontal

Hot adjustment

OFF

during themostat OFF
hot adjustment
defrosting

{

1 Changeable by indoor
Jamper resistance
J1-7 and J1-8

w

w

w

From POWER ON until

warm begins to blow

Depends on remote
controller setting

Depends on remote
controller setting

Extra LOW 1Extra LOW 1 LOW

Minimum 3 minutes 2

Hot adjustment

Horizontal

w2 Even if the room temperature rises above the set temperature during this period, the compressor will not start until this period has ended.

2-3 HEAT operation

FILTER

CHECK MODE

TEST RUN

4

<How to operate>

1 Press POWER ON/OFF button.
2 Press the a button to display “ g ”.
3 Press the i TEMP button to set the desired temperature.

NOTE: The set temperature changes 1°C when the or

button is pressed one time.

Heating 17°C to 28°C

<Display in HEAT operation>

[DEFROST]
The [DEFROST] symbol is only displayed during the defrost
operation.
[STANDBY]
The [STANDBY] symbol is displayed from the heating operation
starts until the heated air begins to blow.

34

(1) Compressor control

13-minute time delay

To prevent overload, the compressor will not start within 3 minutes after stop.

2The compressor runs when the room temperature is higher than the set temperature.

The compressor stops when the room temperature is equal to or lower than the set temperature.

3The compressor stops in check mode or during protective functions.
4Overheat protection.

<Start condition>

When the indoor coil thermistor reads 70: or above, the overheat protection will start.

<Overheat protection>

The compressor stops for 6 minutes, and then restarts.
If the start condition is satisfied again within 10 minutes of compressor operation, both the indoor and outdoor units stop,
displaying a check coe of “P6” on the remote controller.

<Termination conditions>

Overheat protection is terminated when the start condition is not satisfied again during the allowance (10-minute
compressor operation), when operation mode changes to other mode, or when thermostat turns OFF.

(2) Indoor fan control

(a) Normal control

(!)The indoor fan runs on EXTRA-LOW speed during the thermostat OFF.

EXTRA-LOW speed can be changed to LOW or HIGH speed by setting the Jumper resistance J1 and J1-8. If the
indoor coil temperature becomes more than 5 degrees below the room temperature during the thermostat OFF, the
indoor fan will stop. After, when the indoor coil temperature becomes within 5 degrees of room temperature, the
indoor fan will run on EXTRA-LOW speed.

(@)Hot adjustment

Hot adjustment is a warm-up for HEAT operation.
<Start conditions>
The hot adjustment works under any of the following conditions.

●HEAT operation starts.

●Defrosting ends.

●Thermostat turns ON.

<Hot adjustment>
Initially, the indoor fan runs on EXTRA-LOW speed. When 5 minutes have passed or the indoor coil temperature
exceeds 35:, the fan speed changes to LOW. Two minutes later, the hot adjustment ends. Then, the fan speed

depends on the remote controller setting.
(#)The indoor fan stops when the indoor coil temperature is within 5 degrees either way of room temperature.
($)To eliminate the remaining heat, the indoor fan runs for the first 1 minute after the booster is turned OFF.

35

(3) Auto vane control

(a) STOP mode (fixed operation)

( i ) The airflow direction at the start-up of HEAT operation is the same as that of the previous operation.
( ii ) The airflow direction can be charged by the remote controller setting.

In the following cases, airflow direction becomes horizontal regardless of the remote controller setting.

1 During the hot adjustment with fan speed at EXTRA-LOW
2 During defrosting with indoor fan OFF
3 During the thermostat OFF

(b) SWING mode

( i ) The vane motor turns ON when the SWING mode is selected.

The vane motor is continuously ON during SWING mode.

( ii ) In the following cases, the airflow direction is horizontal regardless of the remote controller setting.

1 During the hot adjustment with fan speed at EXTRA-LOW
2 During defrosting with indoor fan OFF
3 During thermostat OFF

(4) Booster heater control

When the room temperature is 3 degrees below from the set temperature, the booster heater will turn ON.
When the room temperature is equal to the set temperature, booster heater will turn OFF.
During the hot adjustment, the booster heater will not work.

< Overheat prevention >

When the indoor coil thermistor rises to 60: or above, the booster heater cannot work.
When the indoor coil thermistor falls to 55: or below, the booster heater can work.

(5) Detecting abnormalities in the outdoor unit

When the outdoor unit is determined to be abnormal by the following causes, the compressor will stop and the check code
“ P8 ” will appear on the remote controller display.

1 During compressor ON after hot adjustment

1 If the difference between the indoor coil temperature and room temperature is in the RANGE B, the indoor fan will

stop.
2 Within 20 minutes after entering RANGE B (except for the first 10 seconds),
a) If the temperature difference enters RANGE A, the hot adjustment stasrts,
b) If the temperature difference is still in RANGE B, the outdoor unit is deemed abnormal.
c) If the temperature difference enters RANGE C, defrosting starts.

Within 20 minutes after entering RANGE C,

●If the temperature difference does not return to RANGE B,the outdoor unit is deemed abnormal.

●If the temperature difference returns to RANGE B, the next 20 minutes is an allowance period. If the difference enter

RANGE A during the allowance, defrosting ends and the hot adjustment starts. If the difference does not enter
RANGE A during the allowance, the outdoor unit is deemed abnormal.

2 During compressor ON in hot adjustment

After 30 minutes of defrosting in hot adjustment, if the temperature difference is still in RANGE C, the outdoor unit is
determined to be abnormal.

3 During compressor OFF

After 20 minutes of thermostat OFF, if the indoor coil thermistor reads -25°C or below, the outdoor unit is determined to
be abnormal.

horizontal

20° 40°

60°

SWING

w1 (See the next page)

36

(6) Indoor coil thermistor abnormality detection

An abnormality can be detected during compressor ON, except for the following.

●For the first 30 minutes after the temperature difference between the indoor coil temperature and room temperature
enters the RANGE C.

●When the temperature difference enters the RANGE C until it moves to the RANGE B.

(7) Defrosting operation

After the outdoor unit starts the defrosting operation, when the temperature difference beetween the indoor coil
temperature and room temperature gets out of RANGE A and into RANGE B, the indoor unit starts the defrosting mode.
After the outdoor unit stops the defrosting operation, when the temperature difference returns to the RANGE A, the indoor
unit stops the defrosting mode. While the indoor unit is in the defrosting mode, the indoor fan and the booster heater stop.

w1 RANGE A : Indoor coil temperature is more than 5 degrees above room temperataure.

RANGE B : Indoor coil temperature is within 5 degrees either way of room temperature.
RANGE C : Indoor coil temperature is more than 5 degrees below room temperature

Indoor coil temperature
minus room temperature

+5

0

-5

RANGE A

RANGE B

RANGE C

(degree)

37

2-4 AUTO operation (Automatic COOL/HEAT change over operation)

(1) Initial mode

1 When AUTO operation starts after unit OFF.

● If the room temperature is higher than the set temperature, operation starts in COOL mode.

● If the room temperature is equal to or lower than the set temperature, operation starts HEAT mode.

2 When AUTO operation starts after COOL or HEAT operation, the previous mode continues.

(2) Mode change

1 HEAT mode changes to cool mode when 15 minutes have passed since the room temperature became 2 degrees

above the set temperature.

2 COOL mode changes to HEAT mode when 15 minutes have passed since the room temperature became 2 degrees

below the set temperature.

(3) Temperature range

AUTO operation is available under the outside air temperatures as follows.

Mode change (HEAT COOL)

When room temperature becomes 2 degrees above the set temperature,the operation mode can not be changed
for 15 minutes.

(degree)

To+2

To:Set temperature (19 28 )

To+1

To

To - 1

To - 2

Compressor

Start

HEAT mode HEAT mode

Mode change

15 minutes

Minimum 3 minutes

15 minutes

Minimum 3 minutes

COOL mode

(COOL HEAT)

ON
OFF

-9 0 1020304046

-8.5

Cooling range

(Outside air temperature)

Heating range

-5

FILTER

CHECK MODE

TEST RUN

4

<How to operate>

1 Press POWER ON/OFF button.
2 Press the button to display “ ”

3 Press the TEMP button to set the desired temperature.

NOTE: The set temperature changes 1°C when the or

button is pressed one time.
Automatic 19 to 28°C

●“AUTOMATIC” works to change by itself the operation
mode either to cooling or heating according to the room
temperature.

38

<How to operate>

To change the air flow direction, press button.

NOTE: Vane angle can be change to upper angle by cutting off the J5-3.

(Jamper resistance of indoor units)

(1) COOL/DRY operation

At the start-up of COOL or DRY operation, the airflow direction in automatically set to horizontal. After, it can be changed

to another direction with button on the remote controller.

<Auto return>

When 40° or 60° airflow is set with fan speed in LOW, “AUTO RETURN” appears below the room temperature display.

One hour later the direction changes to horizontal degrees, automatically and “AUTO RETURN” disappears.

(2) HEAT operation

At the start-up of HEAT operation, airflow direction depends on the setting of the last operation.
After, it can be changed to another direction with button. The airflow direction shifts to horizontal regardless of the

remote controller settings under any of the following conditions.

● Thermostat OFF

● Defrosting

● Indoor fan speed EXTRA-LOW in hot adjustment

Available in COOL operation with fan speed on HIGH or in
HEAT operation.
Unavailable in DRY operation.
If fan speed changes from LOW to HIGH during 20°
downward airflow in COOL mode, the direction
automatically changes to horizontal.

Horizontal

1

20˚

2

40˚

3

60˚

4

swing

5

2-5 Auto vane control

FILTER

CHECK MODE

TEST RUN

4

Changes by pressing the button.

39

<Timer function>

AUTO STOP ·········The air conditioner stops after the set time lapses.
AUTO START ········The air conditioner starts after the set time lapses.
TIMER OFF ··········Timer is not active.

<How to operate>

1. Press POWER ON/OFF button.

2. Press “ ” button to select AUTO STOP or AUTO START.

3. Press “ ” button to set desired time.
Time setting is in 1 hour units for up to 24 hours.
Each time HOURS button is pressed, set time increases by 1 hour.
When HOURS button is pressed and held, the set time increases

by 1 hour every 0.5 seconds.

4. To cancel the timer operation, press POWER ON/OFF button.

2-7 Test run
<Before test run>

● After installing, wiring, and piping the indoor and outdoor units, check for refrigerant leakage, looseness in power supply or
contorol wiring, and mistaken polarity.

● Use a 500-volt megger to check the resistance between the power supply terminal block and ground to make sure that it is
at least 1.0MΩ.

Attention:
Do not use the air conditioner if resistance is less than 1.0MΩ.

This setting will stop the air conditioner in 8 hours.
With the lapse of time, time display changes in 1 hour units, showing remaining time.

2-6 TIMER operation

OFF

TEST RUN button

TEST RUN

Indoor coil temperature code

Display

Display

FILTER

CHECK MODE

TEST RUN

4

Remote controller

1

Turn on main switch,12 hours before proceeding to step 2 to allow

for crankcase heater operation.

2

Push the TEST RUN button twice and indication of TEST RUN will

be shown on the liquid crystal display.

4

Push button LOW/HIGH to check that the fan speed changes

properly.

6

After the check is finished leave the test run mode, push the power

ON/OFF button.

It can also be stopped by pushing the timer MODE button.

5

Check the operation of outdoor unit fans.This unit controls the

rotation speed and performance capacity of fans.ln some cases,it
may rotate at low speed as the condition of outside air requires and
the speed will be kept unless the performance has become deficient.

Therefore,when the condition of outside air demands,there may be

such cases as the fan stops or rotates reversely.

Please note that these symptoms are not mulfunction.

3

Press the button to display , COOL/DRY(or HEAT)to

confirm that cool (or warm) air is blown out.

(At heating operation, there may be a short delay before warm air

begins to blow out.)

*The above figure shows the state of TEST

RUN at cooling operation.

●When a TEST RUN is started,the timer shall be set to 2 hours. The unit will automatically turn off after 2 hours.

<Timer setting example>

FILTER

CHECK MODE

TEST RUN

4

40

(1) Indoor coil temperature code

During the test run, the indoor coil temperature code from 1 to 15 is displayed on the remote controller instead of room
temperature. The code should fall with the lapse of time in normal COOL operation, and should rise in normal HEAT
operation.

(2) Trouble during test run

● If the unit malfunctions during the test run, refer to section 10 in this manual entitled “TROUBLESHOOTING.”

● When the optional program timer is connected to the conditioner, refer to its operating instructions.

2-8 Emergency operation

When the remote controller or microprocessor malfunctions but all other parts are normal, emergency operation is started
by setting the dipswitch SW3 on the indoor controller board.

<Before emergency operation>

1. Make sure the compressor and the indoor fan are operating normally.

2. Locate the defect with the self-diagnostic function. When the self-diagnostic function indicates “protective function is
working”, release the protective function before starting the emergency operation.
CAUTION: When the self-diagnostic function indicates a check code of “P5” (drain pump malfunction), DO NOT start

the emergency operation because the drain may overflow.

<How to operate>

1. For emergency cooling, set the dipswitch SW3-1 to ON and SW3-2 to OFF.
For emergency heating, set the dipswitch SW3-1,2 to ON.

2. Turn ON the outdoor unit breaker and then ON the indoor unit breaker.

Emergency operation will now start.

3. During emergency operation, the indoor fan operates on high speed, but the swing louvers and the auto vanes do not
operate.

4. To stop emergency operation, turn OFF the indoor unit breaker.

NOTE: The remote controller POWER ON/OFF button can not start/stop emergency operations.

CAUTION: Do not use emergency cooling for more than 10 hours, as the indoor coil may freeze.

1 ON

1

2

1.2 ON

1

2

1-2 OFF

1

2

Emergency
cooling

Emergency
heating

Normal
operation

Microcessor board

Code 1 2 3 4 5 6 7 8

Code 9 10 11 12 13 14 15

Indoor coil
temperature

Indoor coil
temperature

-40~1: ~10: ~15: ~20: ~25: ~30: ~35: ~40:

~45: ~50: ~55: ~60: ~70: ~90:

Thermistor
abnormality

2-9 Interlock with ventilation system (LOSSNAY)

Mr. SLIM/LOSSNAY interlock operation is available by using the optional parts listed below.

(1) System organization

Relay box (PZ-12RB-E)

Relay box

LOSSNAY

Mr. SLIM

Remote
controller

Power supply

LOSSNAY

Mr. SLIM

Remote
controller

LOSSNAY control switch (PZ-05SLB

Power
supply

2-E) LOSSNAY control switch

(PZ-05SLB

Remote display
adapter
(PAC-SA88HA-E)

2-E)

(2) LOSSNAY models connectable to Mr. SLIM are : LGH-15RS-E, LGH-50RS-E

LGH-25RS-E, LGH-80RS-E
LGH-35RS-E, LGH-100RS-E

(3) Reqired parts are:

● Relay box (PZ-12RB-E)…Contact capacity 10A

● Remote display adapter (PAC-SA88HA-E)…An optional part for Mr. SLIM

…

2-E)

● LOSSNAY control switch (PZ-05SLB

For LOSSNAY individual operation

(4) Operation

1LOSSNAY turns ON/OFF according to Mr. SLIM ON/OFF
2While Mr. SLIM is OFF, LOSSNAY individual operation is available by using the LOSSNAY control switch.

When Mr. SLIM turns OFF with the LOSSNAY control switch at ON, LOSSNAY will continue to operate.

(5) Wiring.

2When the LOSSNAY control switch is not used:1When the LOSSNAY control switch is used

Remote
controller

Power
supply
50Hz
220 240V

10m

Connecting wire

0.13mm or over

Connecting wire
solid wire,

1.6 or 2.0
(field supplied)

Circuit breaker

(field supplied)
L
N

PL

HIGH

N

LOSSNAY control switch
(PZ-05SLB

Insulation
is needed

2

Indoor controller

N
L

LOW

DAMPER

2-E)

Mr. SLIM

board

Connector

CN51

ORN

RED

BRN

GRN

YLW

Junction box
(field supplied)

Power supply
for Mr. SLIM
220 240V AC

Relay box

(PZ-12RB-E)

YLW

A

ORN

B

RED

L

WHT

N

RED

HIGH

N

WHT

LOSSNAY

Terminal
block

ORN

LOW

RED

HIGH

WHT

N

RED

DAMPER

ORN

DAMPER

WHT

Relay box

(PZ-12RB-E)

Terminal block

A B L N HIGH N

Mr.SLIM
CN51

8

7

4

6
2

5

3

1

12V DC

L

Power supply
220 240V AC

Circuit
breaker

N

NOTE: For further information, refer to the

LOSSNAY technical & service manual.

LOSSNAY

Terminal block

ORN

LOW

RED

HIGH

WHT

N

RED

DAMPER

ORN

DAMPER

WHT

41

42

2-10 Dip switch functions

Each figure shows the initial factory setting.

1 On remote controller board

(1) SW17(Address selector)

SW17-1~6) For address setting
SW17-7) When two remote controllers are used,this switch sets the controller function.

OFF:The remote controller is set as a main controller.
ON:The remote controller is set as a sub controller.

SW17-8) Switch for system back-up (This switch is unavailable for PLH-GKHA.Keep this switch at OFF.)

OFF:Without back-up
ON:With back-up

(2) SW18 (Function selector)

SW18-1) Switch for timer

OFF:Single day ON:Timer every day

SW18-2) Switch for filter sign

OFF:Filter sign absent
ON:Filter sign present

SW18-3) Switch for filter sign time setting.

OFF:100Hr ON:2500Hr

SW18-4) Not yet used.

1 2 3 4 5 6 7 8

ON
OFF

1 2 3 4

ON
OFF

J1-4) Switch for drain pump

Provided :The drain pump works in only COOL operation.
Not Provided :The drain pump works in both COOL and HEAT operation.

J1-5) Switch to change the temperature to start coil frost prevention

Provided :1°(For all current models)
Not Provided :-3°(For previous special models)

J1-6) Switch for set temperature adjustment in HEAT mode

During HEAT operation,warm air collects near the ceiling.When the indoor unit is installed near the ceiling,the
temperature read by room temperature thermistor differs from the actual living-space temperature by about 4
degrees. Therefore,the room temperature read by room temperature thermistor must be lowered by 4 degrees.
Provided :4-degree adjustment
Not Provided :No adjustment

J1-7) Switch for fan speed during thermostat OFF in HEAT operation

Provided :EXTRA LOW
Not Provided :LOW

J1-8) Switch for fan speed during thermostat OFF in HEAT operation

Provided :EXTRA LOW or LOW(set with SW1-7)
Not Provided :LOW or HIGH(set with remote controller)

J1-9) Switch for detecting abnormalities in the outdoor unit abnoamality detection

Provided :When an abnormality occurs,it is detected.
Not Provided :Even if an abnormality occurs,it can not be detected.

J1-10) Switch for auto restart function

Provided :This function does not work
Not Provided :This function works.

2 On indoor controller board

PCH-2,2.5,3,4,5,6,GKH(S)A

1

(1) J1 (Function selector Jumper resistors)

145678910

43

(2) SW2 (Address selector)

Used insetting the unit-address for group control.
For further information, refer to page 40.

(3) SW3 (Emergency operation switch)

Normal operation For emergency cooling For emergency heating

(4) J5 (Model selector emergency heating)

J5-2) Provided : For models with heat pump.

Not provided : For models without heat pump.

J5-3) Available : Vane horizontal angle

......

Normal

Not available : Vane horizontal angle

......

Upper angle

J5-4) This jumper is unavailable for PCH-GKA, keep this.

(5) SW6 (Model selector)

(6) SW7 (Model selector)

SW7-1,7-3,7-4) : Capacity setting

(7) J9 (Model selector)

123456
ON
OFF

12
ON
OFF

12
ON
OFF

12
ON
OFF

234

1234
ON
OFF

SW6-1 OFF ON (Twin No.1) ON (Triple No.1)
SW6-2 OFF ON (Twin No.2) ON (Triple No.2)
SW6-3 OFF OFF ON (Triple No.3)
SW6-4 OFF OFF ON

Single control Twin control Triple control

1234

ON
OFF

PCH-2

ON
OFF

PCH-2.5

ON
OFF

PCH-3

ON
OFF

PCH-4

ON
OFF

PCH-5

ON
OFF

PCH-6

SW7-2) Voltage change

ON : 240V
OFF : 220V

23

J9-1) Provided

J9-2) Provided

}

PCH-GKHA

1234

44

2-11 INDOOR FAN CONTROL

Each figure shows the initial factory setting.

(1) Fan motor max. rotational frequncy for PCH-GKHA

(2) Indoor fan relay output

(a) During fan ON

The indoor fan relay turns ON. One second later, the phase control will start.

(a) During fan OFF

The phase control turns OFF. One second later, the indoor fan relay will turn OFF.

Service Ref.

Voltage

(V)

100% rotational

frequency (rpm)

220
230
240
220
230
240
220
230
240
220
250
240
220
230
240
220
230
240

15Hz
1370
1380
1390
1350
1360
1370
1350
1360
1370
1150
1160
1170
1150
1170
1190
1160
1180
1200

PCH-2GKHA1

PCH-2.5GKHA1

PCH-3GKHA1

PCH-4GKHSA1

PCH-5GKHSA1

PCH-6GKHSA1

45

3. OUTDOOR UNIT CONTROL

3-1 Outdoor fan control

The rotational frequency of outdoor fan is phase-controlled according to the outdoor coil temperature. This control allows the
cooling operation even with the low outside-air temperature and the heating operation even with the high outside-air
temperature.

3-2 Outdoor unit control

The outdoor unit turns ON/OFF the cooling/heating operation according to orders given from the indoor unit.

3-3 Protective functions

1 If an reversed-phase, an open phase, or an indoor controller abnormality is detected, the outdoor unit will stop operation

and the check mode will start. (For the check mode details, see page 52.)

2 If a protective function works, the compressor will stop running. Three minutes later, the compressor will restart. If the

protective function works again, the compressor will stop running and the check mode will start.

3 The protective function is memorized.
4 The memory is cleared when the POWER ON/OFF button on the remote controller is turned OFF. However, the check

mode dispaly continues until the outdoor unit receives the “operation ON” command from the indoor unit.

3-4 COOL/HEAT operation time chart

w1 If compressor restarts within 10 minutes, 4-way valve remains ON.

Thermostat

Compressor

Crankcase heater
(with jumper wire
J3)

Crankcase heater
(without jumper
wire J3)

4-way valve
(COOL)

4-way valve
(HEAT)

Bypass valve

Operation starts by
POWER button ON.

ON

OFF

ON

OFF

ON
OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

Room temperature
becomes equal to set
temperature.

60 minutes

60 minutes 60 minutes 60 minutes 60 minutes 60 minutes

10 minutes

3 minutes

Room temperature
becomes different from
set temperature.

Operation stops by
POWER button OFF.

60 minutes

Repeats 60-minute
ON/OFF

10 minutes 1

3 minutes

Outdoor fan

ON

OFF

46

(1) Start conditions

A. When all of the following conditions are satisfied, defrosting will start. However, when the bypass valve turns OFF,

defrosting starts 10 minutes later.
(a) More than seven minutes have passed since the compressor start-up.
(b) The outdoor coil thermistor reads -5°C or below.
(c) The outdoor fan motor output step is 100%
(d) Total time of compressor operation exceeds 30 minutes, and the outdoor coil temperature has fallen by 8 degrees or

more in comparison with that of 10 minutes after the compressor start-up.

NOTE: The outdoor coil temperature of 10 minutes after the compressor start-up is memorized until the defrosting

operation has ended.

B. When all of the following conditions are satisfied, defrosting will start.

(a) ~ (c) The same as above (a) ~ (c) in item A
(d) Total time of compressor operation exceeds “defrost interval”.

Further information on the defrost interval is described in (3).

C. After the total time of compressor operation exceeds the defrost interval, the thermostat repeats ON/OFF three times.

Two minutes after the fourth “ON” of the thermostat, if the outdoor coil thermistor reads -5°C or below and the fan
output output is 100%, defrosting will start.

NOTE: The count of the thermostat ON/OFF is cleared by the compressor-OFF command or defrosting start-up.

(2) During defrosting

● Even if the thermostat turns OFF, defrosting continues.

● The 4-way valve, bypass valve, outdoor fan, and indoor fan are OFF.

ON

Outdoor fan

Compressor

4-way valve

Bypass valve

Auto vane

Indoor fan

35degrees(SW5-3 OFF)or 20degrees(SW5-3:ON)discharge direction

(Remote controller still displays set direction.)

Outdoor unit

Indoor unit

ON

Set direction

ON

OFF

OFF

OFF

ON
OFF

ON

OFF

ON
OFF

Set direction

Defrosting
starts.

Defrosting
stops.

3-5 Defrosting in HEAT mode
<Defrosting time chart>

47

(3) Defrost interval

The defrost interval time is determined as follows.

● Initial defrost interval is 50 minutes.

● The defrost interval after defrosting depends on the preceding defrosting time as shown below.

NOTE1:If the unit stops during defrosting , the next defrost interval will be 50 minutes.
NOTE2:If a protection function works for the first time during defrosting, the compressor will stop.

After a 3-minute time delay, defrosting will restart. In this case, a 3-minute time delay is included with the defrosting
time.
If the protection function works for the second time, the unit stops operation and displays the check code.
The next defrost interval will be 30 mimutes.

NOTE3:When the defrosting has ended, the total time of the compressor operation is cleard.

(4) Termination conditions

Defrosting finishes when any of the following conditions are satisfied.

1Defrosting has continued for 15 munites.
2Outdoor coil thermistor reads 22°C or above for the first 75 seconds after defrosting start-up.
3Outdoor coil thermistor reads 8°C or above after the 75-second defrosting.
4Power ON/OFF button is turned OFF during defrosting.

3-6 Actuators
(1) Bypass valve control

<Cooling mode>
1When the unit stops due to the coil frost prevention, the bypass valve turns ON. When one hour ahs passed since the

compressor stopped, the bypass valve returns to OFF.

2When the compressor operates with the bypass valve at ON for more than 30 minutes, the bypass valve turns OFF.
3When the compressor stops with the bypass valve at OFF, the bypass valve turns ON and remains ON for three

minutes.

<Heating mode>
1When the unit starts for the first time after the circuit breaker has been turned ON, or when it starts after the

compressor OFF of 30 minutes or more, if the outdoor coil thermistor reads 12°C or more, the bypass valve turns ON.

2When the high pressure switch (63H1) works, the bypass valve turns ON.
3When the bypass has been ON for 30 minutes:

● If the high pressure switch has already returned, the bypass valve turns to OFF.

● If not, the fan output step keeps 70 for three minutes. Meanwhile, if the high pressure switch returns, the bypass

valve turns OFF. Otherwise the normal fan control starts.

4When the operation mode changes or stops, the bypass valve turns ON and remains ON for three minutes.
<Defrosting operation>

1The bypass valve is OFF.

(2) Crankcase heater control

1With jumper wire J3

The crankcase heater is ON from when the power is turned ON until the compressor starts, and then turns ON one
hour after the compressor stops.

2Without jumper wire J3

The crankcase heater is ON from when the power is turned ON until the compressor starts, and repeats 1-hour ON
and 1-hour OFF.

Defrosting operation time Next defrost interval
3 minutes or below 120 minutes
3 to 7 minutes 80 minutes
7 to 10 minutes 60 minutes
10 to 15 minutes 40 minutes
15 minutes (Maximum) 30 minutes

48

3-7 Service functions
(1) Compulsory defrositng

1When all of the following conditions are satisfied, pressing SW2 starts the compulsory defrosting.

● During HEAT mode

● The compressor is ON.

● The outdoor coil temperature is being displayed by LED. (Outdoor controller board dip switch SW3-1 : OFF, SW3-2 :

ON)

● The outdoor coil thermistor reads 8°C or below.

2The operation state and the termination conditions of the compulsory defrosting are the same as those of the normal

defrosting. As an exception, the defrost interval after the defrosting completion is 50 minutes.

(2) Fixed fan-output

While the compressor is operating (exept during defrosting) and the fan output step is indicated by LED, pressing SW2
fixes the fan output. The fixed fan-output can be released when any of the following conditions are satisfied.

1SW2 is pressed again.
2SW3 setting is changed.
3The compressor stops.
4Defrosting operation starts.

(3) Function of switches on the outdoor controller board

SW1: Clears the check code memory (push-button switch)
SW2: Switches the output state indication and the check code display (push-button switch)
SW3-1,2: Switches the output state indication items (dip swtich)
For further information, refer to page 47.

(4) 100% fan output

Fan output is fixed to 100% by shorting the connector CN22. However, the fan stops during compressor OFF or defrosting.
Open-circuit of CN22 restarts the normal fan control.

(5) Time shorterning

Short circuit of the connector CN21 shortens the time as follows

1Fan control period: 30 seconds → 3 seconds
2Three-minutes time delay function : 3 minites → 3 seconds
3Max. time of defrosting : 15 minites → 15 seconds
4Defrost interval : 30 ~ 120 minutes → 3 ~ 12 seconds
5Compressor ON/OFF time for bypass valve ON/OFF : 30 minutes → 3 seconds
6Compressor ON time to start other functions : x minutes → x seconds
7Crankcase heater operation : 1 hour → 6 seconds

49

10

TROUBLESHOOTING

Symptom Cause Check points

The display “CENTRALLY
CONTROLLED” on remote
controller dose not
disappear.

1) Wrong address setting of remote
controller/indoor controller board.

2) Timer adapter is connected to the
remote controller.

3) Singnal transmission error between
indoor unit and remote controller.

1) Check the address setting of remote controller
and indoor controller.

2) Make sure the timer adapter is used correctly.

3) 1 Turn another remote controller’s DIP SW17-

7 ON to make it sub controller.

2 Connect the sub controller to the unit, and

turn circuit breaker ON.

● If the display “centrally controlled”

disappears, replace the original remote
controller.

● If the display remains the same, replace the

When remote controller
POWER button is turned
ON, the check code
“EO”appears.

1) Signal transmission error between
indoor unit and remote controller

1) 1 Connect a sub remote controller.
2 Turn circuit breaker ON.

If the display “centrally controlled” remains,
replace the indoor controller board.

3 If the display disappears, turn the remote

controller POWER button ON and check as
follows.

When remote controller
POWER button is turned
ON, operating display
appears, but disappears
soon.

1) Short circuit of indoor/outdoor
connecting wire

2) Short circuit of transmission wire.

3) Short circuit of drain sensor heater
circuit.

4) Wrong operation of remote controller
due to noise wave emitted by other
appliances.

1), 2) Check the wire

3) Measure the resistance of the drain sensor
connector CN50 1 ~ 3. Normal resistance
should be 82Ω.

4) Turn the circuit breaker OFF, and then turn
ON.

If the remote controller remains abnormal,
despite the above measures, replace the indoor
controller board.

Despite turning POWER
button ON, the remote
controller display does not
appear.

1) Damaged remote controller.

2) Short circuit of transmission wire.

3) Bad contact of indoor CN40.

4) CN40 is attached to a sub unit.

5) Damaged transformer.

6) Bad contact of CN40.

7) Blown fuse.

8) Circuit breaker OFF.

1) Measure the voltage between terminals of
remote controller. If no voltage, remove the
terminals and measure the voltage between
wires. If the voltage is between 6VDC and
12V, replace the remote controller.

2) ~ 8) Check each point.

If it is not defective, replace the indoor
controller board.

1.TROUBLES IN TEST RUN

1

2

3

4

Remote controller

Operating Display

Operating Display

No Display

No Display

Sub remote controller

EO Display

Operating Display

EO Display

Operating Display

Malfunction

Malfunction of
indoor Unit

Malfunction of
Remote controller

Malfunction of
indoor Unit and
Remote Controller

Malfunction of
Remote controller

50

2. SELF DIAGNOSTIC FUNCTION WITH REMOTE CONTROLLER

2-1 When malfunction occurs during operation

When a malfunction occurs, the indoor and outdoor units stop and the malfunction is displayed on the LCD of the remote
controller.
(1) ON the set temperature display part, “CHECK” appears, and the unit

address and the check code are diplayed alternately at one-second
intervals. (Check mode)

2-2 How to use the self diagnostic function for service
A. For normal control with one unit and one remote controller

(1) Pressing the CHECK. button on the remote controller twice starts the self diagnostic function.
(2) During the self diagnostic function, “CHECK” appears at two positions on the remote controller display. Then, at least

10 seconds later, the unit address and the check code is alternately displayed at one-second intervals.

(3) Check and repair the unit according to the check code. (Refer to the next page.)

2-3 For group control using one remote controller

(1) Press the TEMP. or TEMP. button on the remote controller to advance or go back to the unit address.

Each time TEMP. button is pressed, the unit address advances by one. Each time TEMP. button is
pressed, the unit address goes back by one.
The check code and the unit address, appear alternately.

(2) The check code “U8” means no malfunction has occurred since installation.

The check code “EO” means the following conditions:

● The unit address displayed on the remote controller does not apply to any unit.

● Power is not supplied to the unit.

● Signal transmitting/receiving circuit is abnormal.

(3) Check and repair the unit according to the check code. (Refer to the next page.)

CHECK

°C

CHECK

°C

Example

Altenately

displayed

Unit address Check code

(2) When one remote controller controls several units in the group

control, the LCD shows the unit address and check code of the first
malfunctioning unit.

(3) To cancel the check mode, press the ON/OFF button. In remote

ON/OFF control, press the remote ON/OFF switch. In centralized
control, turn OFF the ON/OFF button of centralized controller.

NOTE: The latest check code is memorized, even if the check mode is cancelled by the way mentioned above. It takes

60 seconds maximum to display the memorized check code.

FILTER

CHECK MODE

TEST RUN

4

CHECK mode

51

Check

code

Diagnosis of malfunction Cause Check points

EO Signal transmitting/receiving

error

(Indoor controller does not

respond to remote controller
signal.)

During individual unit control

1) Bad contact of transmission
wire

2) Signal transmitting/receiving
circuit is abnormal.

1) Check the transmission wire.

2) Check with another remote controller. If “EO” is
still indicated, replace the indoor controller
board.
If other check code appears. replace the
original remote controller.

P3 Signal transmission error

(Remote controller does not

respond to indoor controller
signal.)

1) Bad contact of transmission
wire

2) Signal transmitting/receiving
circuit is abnormal.

3) Wrong operation due to noise
wave emitted by other
appliances

1) Check the transmission wire.

2) Check with another remote controller.
If “P3” is still indicated, replace the indoor
board.
If other check code appears, replace the
original remote controller.

3) Short-circuit between 1 and 2 of CN40 and
attach CN40 to the following units.

● Second unit in twin control

● Second and third units in triple control

● Sub units in group control

P4 Abnormality of drain sensor 1) Bad contact of transmission

wire

2) Damaged thermistor

1) Check the connector.

2) Measure the resistance of the thermistor 4 ~

5.
As for the normal resistance, refer to the case
of P1.

If the resistance is normal, replace the indoor

controller board.

P5 Malfunction of drain pump 1) Malfunction of drain pump

2) Damaged drain sensor

1) Check the drain pump.

2) ● Check the drain sensor.

● Check the drain sensor heater. Normal

resistance should be 82Ω.

If the resistance is normal, replace the indoor

controller board.

P6 Coil frost protection is

working.

1) Short cycle of air cycle

2) Dirty air filter

3) Damaged fan

4) Abnormal refrigerant

1) Clear obstructions from the air cycle.

2) Clean the air filter

3) Check the fan.

4) Check the refrigerant temperature.

P7 System error 1) Wrong address-setting

2) Signal transmitting/receiving
circuit of remote controller is
abnormal.

3) Wrong SW6-setting

1) Check the address-setting.

2) Check with another remote controller. If check
code other than “P7” appears, replace the
original remote controller.

3) Check SW6 setting.

P8 Abnormality in outdoor unit 1) Wrong wiring of indoor/outdoor

connecting wire

2) Reversed phase

3) Protection device is working

4) Damaged outdoor coil
thermistor

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.

P1P2Abnormality of room

temperature thermistor (RT1)

Abnormality of indoor coil

thermistor (RT2)

1) Bad contact of thermistor

2) Damaged thermistor

1) Check the thermistor.

2) Measure the resistance of the thermistor.
Normal resistance should be as follows.

0 C ···15kΩ 30 C·····4.3kΩ
10 C······9.6kΩ 40 C ·····3.0kΩ
20 C······6.3kΩ
If the resistance is normal, replace the indoor
controller board.

52

3. SERVICE DATA INDICATION BY SWITCHES ON OUTDOOR CONTROLLER BOARD

Setting dip switchs SW2 and SW3 on the outdoor controller board enables LED to show the output state and check code.
Output state is shown by LED lighting, and check code by blinking.
SW1 : Turning SW1 ON clears the check code. If SW1 is turned ON while the check code is blinking , the indication

changes to output state indication.

NOTE : SW1 is usually available independant of SW3 setting. As an exception, when the check code shows a

reversed phase or an open phase during the power-on-reset state, SW1 is not available.

SW2 : SW2 is turned ON by pressing, and OFF by releasing.

When SW3-1 and SW3-2 are OFF, pressing SW2 changes indication between output state and check code
alternately.
When SW2 is turned On with SW3-1 OFF and SW3-2 ON, the compulsory defrosting starts.

SW3 : Output state indication items depend on the combination of SW3-1 ON/OFF and SW3-2 ON/OFF.

Changed alternately by pressing SW2.

Check code Output state

Outdoor coil
temperature

(bit)

Fan Output

step

(bit)

Total time of

compressor

operation(Hr)

SW3-1 OFF OFF OFF ON ON

SW3-2 OFF OFF OFF ON ON

LED

LD1

LD2

LD3

LD4

LD5

LD6

LD7

LD8

Blinking

Reversed phase

Open phase

63H2 function

51C function

26C function

Overheat protection

Outdoor coil thermistor is
abnormal

Input circuit on controller
board is abnormal

Compressor ON command
from indoor controller

Heating operation command
from indoor controller

During 63H1 function

Compressor ON

Outdoor fan ON

4-way valve ON

Bypass valve ON ❊

Crankcase heater ON

1

2

4

8

16

32

64

128

1

2

4

8

16

32

64

128

256

512

1024

2048

4096

8192

16384

32768

Lighting

53

3-1 Outdoor coil temperature

To obtain data on the outdoor coil temperature, add the number of bits of lighting LEDs, and see the graph below to find
the temperature.

3-2 Fan output step

To obtain data on the fan output step, add the number of bits of lighting LEDs, and see the graph below to find the fan
rotational frequency.

3-3 Total time of compressor operation

Compressor operation time is indicated in 256 hour units. To obtain the compressor operation time, add the hours of
lighting LEDs. During the compressor operation time indication, SW2 is not available.

3-4 Check code indication

● When a protection function works for the first time during operation, the operation stops and restarts after the 3-minutes
time delay mode. When the protection function works again, the operation stops. (Check mode) When both SW3-1 and
SW3-2 are OFF, the check code is indicated.

● If the outdoor controller board receives the compressor ON command from the indoor controller board during check
mode the indication changes to output state indication.

● By pressing SW2 duirng normal operation. operation will continue.

● The latest check code is indicated.

50

Fan output step (bit)

Fan rotational frequency (rpm)

100 150 200 250

800

600

400

200

0

50

Fan output step (bit)

Type

Fan rotational frequency (rpm)

100 150 200 250

800

600

400

200

0

Type

100

C

Temperature

80

60

40

20

0

0

(Open 8 bits)(Open 8 bits)

(Short 238 bits)(Short 238 bits)

Number of bits

50 100 150 200 255

-20

-40

1PUH-2/4K type

<50Hz>

2PUH-2.5/3/5/6K type

<50Hz>

54

Blinking

LED

Diagnosis of malfunction Cause Check point

LD1 Reversed phase Phases L1, L2, and L3are

connected improperly.

Check the power supply connection.

LD2

Open phase ● Phase L2is open.

● Contact of protector, such as
thermal switch, opened when
power was turned on.

● Check the power supply.

● Check each protector.

LD3 Outdoor coil thermistor is

abnormal. (Open circuit or short
circuit)

● Outdoor coil thermistor is
broken.

● Thermistor was connected
incorrectly.

● Measure the resistance of the thermistor.

● Check the thermistor. If normal, replace the

outdoor controller board.

LD4 High pressure switch (63H2)

function

● 62H2 was badly connected.

● 63H2 was working.

● Check 63H2 and the outdoor fan motor.

● Check if refrigerant supply is low.

● Check if air cycle is short-cycled.

LD5 Thermal relay (51C) function ● 51C was connected

incorrectly.

● 51C was working.

● Check 51C, the compressor, and power supply.

LD6 Thermal switch (26C) function. ● 26C was connected

incorrectly.

● 26C is working.

● Check 26C.

● Check if refrigerant supply is low.

● Check if the capillary tube is clogged.

LD7 Over heat protection ● The thermistor is broken.

● Coil temperature is over

67°C.

● Measure the resistance of the thermistor.

● Check the outdoor fan motor.

● Check if air cycle is short-cycled.

LD8 Input circuit of outdoor

controller board is abnormal.

● Pulse input is abnormal. ● Replace the outdoor controller board.

Cause

1) Indoor/outdoor connecting wires are poorly connected.
(Refer to next page.)

2) Power supply is poorly connected.

3) Connector or transformer is broken.

4) Fuse (6A) in the outdoor controller board is blown.

Check points

1) Check the connecting wires.

2) Check the power supply.

3) Check connectors and transformers.

4) Check the fuse.

4. TROUBLESHOOTING ACCORDING TO CHECK CODE

5. WHEN OUTDOOR UNIT DOES NOT WORK

55

6. WRONG WIRING ON SITE

6-1 Between remote controller and indoor unit

If the wire is disconnected between the remote controller and the indoor unit, nothing is displayed on the remote controller
when the POWER button is pressed. The beep sound will also not be heard.

6-2 Phenomenon due to wrong wiring between indoor and outdoor units

Wrong wiring Mode

Thermostat

Phenomenon

OutdoorIndoor

1
2
3

1
2
3

COOL

OFF

Operation stops.

ON

4-Way valve turns ON. 9 minutes later, check code “P8” appears
on remote controller display.

HEAT

OFF

Cooling operation. Several minutes later, check code “P8” appears
on remote controller display.

ON

Normal operation.

OutdoorIndoor

1
2
3

1
2
3

COOL

OFF

Outdoor unit stops.

ON

Operation stops. 9 minutes later, check code “P8” appears on
remote controller display.

HEAT

OFF

Operation stops.

ON

Operation stops. 27 minutes later, check code “P8” appears on
remote controller display.

OutdoorIndoor

1
2
3

1
2
3

COOL

OFF

Outdoor unit stops.

ON

Operation stops. 9 minutes later, check code “P8” appears on
remote controller display.

HEAT

OFF

Operation stops.

ON

Operation stops. 27 minutes later, check code “P8” appears on
remote controller display.

OutdoorIndoor

1
2
3

1
2
3

COOL

OFF

Outdoor unit stops.

ON

Operation stops. 9 minutes later, check code “P8” appears on
remote controller display.

HEAT

OFF

Operation stops.

ON

Operation stops, 27 minutes later, check code “P8” appears on
remote controller display.

OutdoorIndoor

1
2
3

1
2
3

COOL

OFF

Outdoor unit stops.

ON

Operation stops. 9 minutes later, check code “P8” appears on
remote controller display.

HEAT

OFF

Operation stops.

ON

Operation stops. 27 minutes later, check “P8” appears on remote
controller display.

Disconnection between 1 and 1 or 2

and 2.

COOL

OFF

Operation stops.

ON

Operation stops. 9 minutes later, check code “P8” appears on
remote controller display.

HEAT

OFF

Operation stops. 4-way valve turns OFF.

ON

27 minutes later, check code “P8” appears on remote controller
display.

Disconnection between 3 and 3.

COOL

–

Normal operation.

HEAT

OFF

Operation stops. 4-way valve turns ON.

ON

Operation stops. 27 minutes later check code “P8” appears on
remote controller display.

56

LOSSNAY control switch does not work.

LOSSNAY control switch can not work during interlock
operation.
LOSSNAY control switch is effective only while Mr. SLIM is not
operating.

Symptom

LOSSNAY air speed can not be controlled in interlock
operation.

LOSSNAY fan speed is fixed to HIGH during interlock
operation.
LOSSNAY fan speed LOW/HIGH can be switched only during
LOSSNAY individual operation with the LOSSNAY contorl
switch.

Cause

For LOSSNAY, troubleshooting refer to the LOSSNAY technical & service manual.

8. MR. SLIM/LOSSNAY INTERLOCK OPERATION

<Symptoms that are not malfunctions>

If any of the following symptoms occur, they are not malfunctions.

Vanes do not work.

Vane motor does not work.
Connector is poorly connected.
Vane motor is poorly assembled.
Indoor controller board is damaged.

Unit stops after 5 to

20 seconds operation

Protection function is working.

Air discharge display

is OFF and button

does not operate.

Indoor controller board
deems the auto vanes
are not attached to the
unit.
Horizontal anlgle can
not be detected.

In this case, remote
controller is normal.

Power ON/OFF button
is not available.

Beep sound is heard,
but display is turned
OFF.

Beep sound is not heard,
and display remains
OFF.

Indoor/outdoor
connecting wire is
connected incorrectly.
Indoor/outdoor
connecting wire shorts.
Compressor protector is
damaged.
Deicer is broken.

Remote controller is
damaged.
Transmission wire is
poorly connected

Transmission wire is
damaged.
Connector is poorly
connected.
Indoor terminal block is
poorly connected.
Remote controller
terminal block is poorly
connected.

Vane motor is damaged.

Refer to check code on remote controller display.
See page 51.

Indoor controller is
damaged.
Dip switch setting is
wrong.

Indoor controller is
damaged.

Vane motor is
damaged.

Auto vane is wired after
power is turned to ON.

Poorly connected
Disconnected

7. OTHER TROUBLES AND CAUSES

Vane motor is damaged.

“CENTRALLY CONTROLLED” is displayed.

1. Removing the air intake grill

(1) Slide the intake grill holding knobs (at two locations)

backward to open the intake grill.

(2) When the intake grill left open, push the stoppers on the

rear hinges (at two locations) to pull out the intake grill.

57

11

DISASSEMBLY PROCEDURE

OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS

2. Removing the electrical box

(1) Remove the air intake grill.
(2) Remove the screw from the beam and remove the beam.
(3) Remove the screws from the electrical cover, and

remove the electrical cover.
(4) Disconnectors including CN6V and CN21.
(5) Remove the screws from the electrical box and pull out

the electrical box.

<Electrical parts in the electrical box>
Terminal block (for power supply)
Terminal block (for in/outdoor connecting wire)
Terminal block (for remote controller)
Fan motor capacitor
Indoor control board
Relay
Transformer

Figure 1

Figure 2

Photo 1

slide

Intake grill

Intake grill
Holding knobs

Hinges

Pull out the intake grill

Electrical cover

Screw(electrical cover)

Screw(electrical box)

Slide to the left

Beam

Clamp

PCH-3GKHA1

Fan motor
capacitor

Transformer

Relay

Indoor
control
board

Terminal
block
(in/out conncting)

Terminal
block
(power suppy)

Terminal
block
(remote control)

58

Figure 2

OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS

3. Removing the fan motor

(1) Remove the intake grill.
(2) Disconnect the fan motor connector.
(3) Unscrew screws for removing the motor guard.
(4) Unscrew screws for removing the fan guard.
(5) Remove the screw for removing the motor support at both

left and right side.

(6) Loosen the set screws at the fan motor side of the

connecting joint.

(7) Slide the fan motor to the left side and pull it out.

4. Removing the sirocco fan

(1) Remove the air intake grill.
(2) Remove 1 beam.
(3) Unscrew screws for removing the motor guard.
(4) Unscrew screws for removing the fan guard.
(5) Remove the lower casing while pressing the stoppers at

upper side of the casing.
(6) Loosen the set screws at the connecting joint.
(7) Remove the sirocco fan and shaft together by sliding the

shaft to the left.

(Note)

Make sure that the upper side casing is snaped to the fan
plate securely with catch.

5. Removing the side panel

(1) Remove the air intake grill.
(2) Remove the screw from the side panel, and remove the

side panel by sliding the panel to the front.

Screw

Side panel

Sliding the pare
to the front

Photo 2

Photo 3

Screws

Motor

Set screws

Motor support

Connecting joint

Motor guard

Fan guard

Motor

Connecting joint

Sirocco fan

Casing

Bearing

Motor gurd

59

OPERATING PROCEDURE PHOTOS

6. Removing the vane motor

(1) Remove the air intake grill.
(2) Remove the left side panel.
(3) Remove the relay connector of vane motor.
(4) Remove the electrical box.
(5) Remove the screws of vane motor, then remove vane

motor.

(Note)

Connect the lead wires and connectors properly and place
them in the proper position so that the wires are not pinched
by other parts.

7. Removing the Under panel

(1) Remove the air intake grill.
(2) Remove the beam.
(3) Remove the side panel (right and left).
(4) Unscrew the screws of the under panel, then remove the

under panel.

w Weight of the under panel : app. 2kg.

7. Removing the Indoor coil thermistor

(1) Remove the air intake grill.
(2) Remove the right side panel.
(3) Remove the relay connector of the pipe thermistor.
(4) Remove the screw, and remove the check panel.
(5) Extract the indoor coil thermistor from the holder.
<Caution for the installation>

There is a possibility for the short circuit when connector gets
wet by water through the thermistor lead wire.
Therefore, lead wire of the indoor coil thermistor should be
traped as shown in the photo 5.

Photo 4

Photo 5

Photo 6

Photo 7

Screw

Screw

Screw

Hold Indoor coil thermistor Trap

Check
panel

Relay connector of
the vane motor

Vane motor

Under panel

Relay connector of
the pipe thermistor

Left side
panel

60

OPERATING PROCEDURE PHOTOS

9. Removing the drain pan (option)

(1) Remove the air intake grill.
(2) Remove the beam.
(3) Remove the side panel (right and left).
(4) Remove the under panel. Remove the screws of the right

and left side drain pan.
(5) Remove the insulation in center of the drain pan, and

after removing the screw, remove the drain pan.

(Note)

Please aware that there might be drain left in the drain pan
when you remove the drain pump (option).

10. Removing the guide vane

(1) Remove the intake grill.
(2) Remove the beam.
(3) Remove the side panel (right and left).
(4) Remove the under panel.
(5) Remove the drain pan.
(6) Remove the screw from the guide vane, then remove the

guide vane.

11. Removing the Auto vane

(1) Remove the intake grill.
(2) Remove the left side panel.
(3) Remove the left side box.
(4) Remove the under panel.
(5) Remove the screw from the auto vane.
(6) Slide the auto vane to the right side and pull the auto vane

out.

Photo 8

Screw

Screw

Screw

Guide vane

Auto vane

Drain pan

Screw

Drain pan

Screw

(Insulation)

Photo 9

Photo 10

61

OPERATING PROCEDURE PHOTOS

13. Removing the heat exchanger.

(1) Remove the air intake grill.
(2) Remove the beam.
(3) Remove the side panel (right and left).
(4) Disconnect the relay connector.
(5) Remove the under panel.
(6) Remove the drain pan.
(7) Unscrew the screw of the pipe cover, and remove the

pipe cover.

(8) Unscrew the screw of the pipe support, and remove the

pipe support.

(9) Unscrew the screw of the heat exchanger, and remove

the heat exchanger.
Remove the heat exchanger with care. Since this is quite
heavy, removing work should be done with more than 2
people.
wWeight of heat exchanger : App. 5.3kg

Photo 11

Clamp

Connector
(heater)

Screws

12. Removing the support heater.

(1) Remove the air intake grill.
(2) Remove the beam.
(3) Remove the side panel (right and left).
(4) Remove the relay connector for the pipe thermistor.
(5) Remove the under panel.
(6) Remove the drain pan.
(7) Remove the screw from the pipe cover, and remove the

pipe cover.

(8) Remove the screw from the pipe support, and remove the

pipe fixed support.

Photo 12

Pipe
support

Pipe cover

Heat
exchanger

Screws

Screws

Electrical
box

Service
panel

62

12

PARTS LIST

STRUCTURAL PART
PCH-2GKHA
PCH-2GKHA

1

2

19 13 15

412 16

28
10

11

23

14

18

1

25

26

2032769

8

7

17

5

24

63

Part numbers that are circled are not shown in the figure

No.

Parts No. Parts Name

R01 17J 661

1

R01 17J 662

2

R01 17J 669

3

R01 17J 676

4

R01 17J 500

5

R01 18J 500

6

R01 17J 691

7

R01 18J 691

8

R01 17J 054

9

R01 17J 651

10

R01 17J 085

11

R01 18J 086

12

R01 29J 223

13

R01 17J 067

14

R01 17J 068

15

R01 17J 002

16

R01 17J 061

17

R01 17J 808

18

R01 17J 809

19

R01 17J 070

20

R01 17J 523

21

R01 17J 072

22

R01 18J 665

23

R01 17J 666

24

R01 17J 668

25
26
27
28

–
–
–

RIGHT SIDE PANEL
LEFT SIDE PANEL
UNDER PANEL
REAR PANEL
L.L. FILTER
L.L. FILTER
GRILLE ASSY
GRILLE ASSY
GRILLE CATCH
FRONT PANEL
GUIDE VANE ASSY-6R.
GUIDE VANE ASSY-6L.
VANE MOTOR
RIGHT SIDE BOX
LEFT SIDE BOX
AUTO VANE
GRILLE HINGE
RIGHT LEG
LEFT LEG
WIRELESS BOARD CASE
JOINT SOCKET
DRAIN HOSE COVER
SIDE PLATE-R.
SIDE PLATE-L.
SERVICE PANEL
BEAM (GA)
REAR SUPPORT
VANE SUPPORT

Specifications

Q'ty / set Price

PCH-2

GKHA, GKHA

Remarks

(Drawing No.)

1

Wiring
Diagram
Symbol

Recom-

mended

Q'ty

Unit

1
1
1
1
1
1
1
1
4
1
1
1
1

MV
1
1
1
4
1
1
1
1
1
1
1
1
2
1
1

(BG17H464H08)
(BG02H454H04)

(BG02R321G06)

Amount

64

STRUCTURAL PART
PCH-2.5GKHA/PCH-3GKHA
PCH-4GKHSA
PCH-2.5GKHA

1/PCH-3GKHA1

PCH-4GKHSA1

16

11

13

14 12

27

15

10

24

17

1

5

22252619

7

369

4

23

18

2

8

65

No.

Parts No. Parts Name

Specifications

PCH-2.5/3

PCH-4

Wiring

Diagram

Symbol

Recom­mended

Q'ty

Unit

Amount

Q'ty / set Price

1

2

3

4

5

6
7
8
9

10

11

12
13
14

15

16

17
18
19
20
21

22

23

24
25
26

27

RIGHT SIDE PANEL
RIGHT SIDE PANEL
LEFT SIDE PANEL
LEFT SIDE PANEL
L.L. FILTER
REAR PANEL
REAR PANEL
FRONT PANEL
FRONT PANEL
GRILLE ASSY
UNDER PANEL
GRILLE HINGE
GRILLE CATCH
RIGHT SIDE BOX
RIGHT SIDE BOX
LEFT SIDE BOX
LEFT SIDE BOX
GUIDE VANE ASSY-6R.
GUIDE VANE ASSY-6L.
GUIDE VANE ASSY-6C.
AUTO VANE
AUTO VANE
VANE MOTOR
VANE MOTOR
RIGHT LEG
LEFT LEG
WIRELESS BOARD CASE
JOINT SOCKET
DRAIN HOSECOVER
SIDE PLATE-R.
SIDE PLATE-R.
SIDE PLATE-L.
SIDE PLATE-L.
SERVICE PANEL
BEAM(GA)
REAR SUPPORT
VANE SUPPORT
VANE SUPPORT

1

1

2
1

1

2
1
4
4
1

1

1
1
1
1

1

1
1
1
1
1
1

1

1
2
1
2

1

1
2

1

1
2
1
4
4

1

1
1
1
1

1

1
1
1
1
1
1

1

1
1
2
1

2

(BG02H454H08)

(BG02H454H04)
(BG02R321G06)
(BG02R805G04)

MV
MV

Remarks

(Drawing No.)

R01 17J 661
R01 35J 661
R01 17J 662
R01 35J 662
R01 17J 500
R01 29J 676
R01 35J 676
R01 29J 651
R01 36J 651
R01 17J 691
R01 29J 669
R01 17J 061
R01 17J 054
R01 17J 067
R01 35J 067
R01 17J 068
R01 35J 068
R01 17J 085
R01 18J 086
R01 29J 087
R01 29J 002
R01 35J 002
R01 29J 223
R01 35J 223
R01 17J 808
R01 17J 809
R01 17J 070
R01 17J 523
R01 17J 072
R01 18J 665
R01 35J 665
R01 18J 666
R01 35J 666
R01 17J 668

—

—
—
—

GKHA

GKHA

1

GKHSA

GKHSA

1

66

STRUCTURAL PART
PCH-5GKHSA

PCH-6GKHSA
PCH-5GKHSA

1

PCH-6GKHSA1

20

14 16 12 29 13 11

17

10
24

15

26

1

27

28

21

3

5

79

8

18

4

25

2

6

19

67

No.

Parts No. Parts Name

R01 35J 661

1

R01 35J 662

2

R01 41J 669

3

R01 41J 676

4

R01 17J 500

5

R01 18J 500

6

R01 17J 691

7

R01 18J 691

8

R01 17J 054

9

R01 41J 651

10

R01 41J 085

11

R01 42J 086

12

R01 43J 087

13

R01 35J 223

14

R01 35J 067

15

R01 35J 068

16

R01 41J 002

17

R01 17J 061

18

R01 17J 808

19

R01 17J 809

20

R01 17J 070

21

R01 17J 523

22

R01 17J 072

23

R01 35J 665

24

R01 35J 666

25

R01 17J 668

26
27
28
29

—
—
—

RIGHT SIDE PANEL
LEFT SIDE PANEL
UNDER PANEL
REAR PANEL
L.L. FILTER
L.L. FILTER
GRILLE ASSY
GRILLE ASSY
GRILLE CATCH
FRONT PANEL
GUIDE VANE ASSY-5R.
GUIDE VANE ASSY-5L.
GUIDE VANE ASSY-5C.
VANE MOTOR
RIGHT SIDE BOX
LEFT SIDE BOX
AUTO VANE
GRILLE HINGE
RIGHT LEG
LEFT LEG
WIRELESS BOARD CASE
JOINT SOCKET
DRAIN HOSE COVER
SIDE PLATE-R.
SIDE PLATE-L.
SERVICE PANEL
BEAM(GA)
REAR SUPPORT
VANE SUPPORT

Specifications

Q'ty / set Price

PCH-5/6

Remarks

(Drawing No.)

GKHSA, GKHSA1

Wiring

Diagram

Symbol

Recom-

mended

Q'ty

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

MV

1
1
1
4
1
1
1
1
1
1
1
1
3
1
3

(BG17H464H08)
(BG02H454H04)
(BG02R805G04)

Unit

Amount

68

No.

Parts No. Parts Name Specifications

PCH-2

GKHA, GKHA

1

Wiring

Diagram

Symbol

Recom­mended

Q'ty

Unit

Amount

Q'ty / set Price

1
2
3
4
5
6
7
8

9

10
11
12
13
14
15
16
17

FAN MOTOR
MOTOR LEG
PIECE (MOTOR)
CASING
SIROCCO FAN
INDOOR COIL THERMISTOR
HEATER ELEMENT
THERMAL SWITCH
INSULATOR
INSULATOR
THERMAL FUSE
DRAIN PAN ASSY
ROOM TEMPERATURE THERMISTOR
HEAT EXCHANGER
DRAIN PLUG
FAN GUARD
FAN GUARD
FAN GUARD

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

MF

RT2

26H

FS1,2

RT1

Remarks

(Drawing No.)

T7W 23J 762
R01 17J 130
R01 43E 126
R01 17J 110
R01 17J 114
R01 17J 202
T7W 23J 300
R01 46K 700
R01 18J 303
R01 20J 303
R01 P02 706
R01 17J 529
R01 18J 202
R01 26J 480
R01 17J 524
T7W 17J 675
T7W 18J 675
T7J 19J 675

DO9B4P54MS

80V 467W
OFF:50: ON:35:

250V 96: 10A

13

6

10

7

9

8

4

16

5

15

11

2

1

3

17

12

5

4

14

FAN AND HEATER PARTS
PCH-2GKHA
PCH-2GKHA

1

69

No. Parts No. Parts Name Specifications

PCH-2.5 PCH-3

GKHA,GKHA1GKHA,GKHA

1

Wiring

Diagram

Symbol

Recom-

mended

Q'ty

Unit

Amount

Q'ty / set Price

1
2
3
4
5
6
7
8

9
10
11

12

13
14

15

16
17
18
19
20
21
22

FAN MOTOR
FAN JOINT
SHAFT (FAN)
SLEEVE BEARING
MOTOR LEG
SIROCCO FAN
SIROCCO FAN
CASING
HEATER ELEMENT
THERMAL SWITCH
THERMAL FUSE
INSULATOR
INSULATOR
INDOOR COIL THERMISTOR
ROOM TEMPERATURE

THERMISTOR

HEAT EXCHANGER
HEAT EXCHANGER
DRAIN PAN ASSY
DRAIN PLUG
BEARING SUPPORT
FAN GUARD
FAN GUARD
FAN GUARD
PIECE (MOTOR)

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

1
1
1
1
2
1
1

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

1
1
1
1
1
2
1
1

MF

H

26H

FS1,2

RT2
RT1

Remarks

(Drawing No.)

T7W 30J 762
R01 29J 116
R01 29J 100
R01 705 103
R01 29J 130
R01 29J 114
R01 33J 114
R01 17J 110
T7W 30J 300
R01 46K 700
T7W 23J 706
R01 20J 303
R01 30J 303
R01 17J 202
R01 18J 202
R01 29J 480
R01 33J 480
R01 29J 529
R01 17J 524
R01 29J 145
T7W 20J 675
T7W 21J 675
T7W 18J 675
R01 43E 126

DC9C4P70MS

80V 700W
OFF:50: ON:35:
110! 15A 250V

9

13

15

11

10

6

8

21

16

20

3

19

7

17

4·18

14

2

1

5

22

12

FAN AND HEATER PARTS
PCH-2.5GKHA
PCH-2.5GKHA

1

PCH-3GKHA
PCH-3GKHA

1

70

No. Parts No. Parts Name Specifications

PCH-4

GKHSA, GKHSA1

Wiring

Diagram

Symbol

Recom-

mended

Q'ty

Unit

Amount

Q'ty / set Price

1
2
3
4
5
6
7
8

9
10
11
12
13

14

15
16
17
18
19
20
21
22

FAN MOTOR
FAN JOINT
SHAFT
SLEEVE BEARING
MOTOR LEG
SIROCCO FAN
SIROCCO FAN
CASING
INDOOR COIL THERMISTOR
ROOM TEMPERATURE THERMISTOR
HEATER ELEMENT
THERMAL SWITCH
THERMAL FUSE
INSULATOR
INSULATOR
HEAT EXCHANGER
DRAIN PAN ASSY
DRAIN PLUG
BEARING SUPPORT
FAN GUARD
FAN GUARD
FAN GUARD
PIECE (MOTOR)

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

MF

RT2
RT1

H

26H

FS1,2

Remarks

(Drawing No.)

T7W 39J 762
R01 29J 116
R01 29J 100
R01 705 103

R01 35J 130
R01 35J 114
R01 39J 114
R01 35J 110
R01 17J 202
R01 18J 202
T7W 39J 300
R01 46K 700
T7W 23J 706
R01 20J 303
R01 36J 303
R01 37J 480
R01 35J 529
R01 17J 524
R01 35J 145
T7W 22J 675
T7W 23J 675
T7W 24J 675
R01 43E 126

D10B4P90MS

80V 900W
OFF:50: ON:35:
110! 15A 250V

6

8

21

16

20

3

19

7

17

11

2

1

5

22

12

13

15

9

4·18

10

FAN AND HEATER PARTS

PCH-4GKHSA

PCH-4GKHSA

1

14

71

17

10

12

4·20

9

23

8

22

18

7

21

19

24

11

6

25

2

3

1

5

16

13

14

15

FAN AND HEATER PARTS
PCH-5GKHSA
PCH-5GKHSA

1

PCH-6GKHSA
PCH-6GKHSA

1

No.

Parts No. Parts Name Specifications

1

T7W 43J 762

2

R01 29J 116

3

R01 29J 100

4

R01 705 103

5

R01 41J 130

6

R01 41J 114

7

R01 39J 114

8

R01 35J 114

9

R01 35J 110

10

R01 17J 202

11

R01 18J 202

12

T7W 43J 300

13

R01 46K 700

14

T7W 23J 706

15

R01 20J 303

16

R01 36J 303
R01 41J 480

17

R01 45J 480

18

R01 41J 529

19

R01 17J 524

20

R01 35J 145

21

T7W 25J 675

22

T7W 23J 675

23

T7W 24J 675

24

T7W 26J 675

25

R01 43E 126

FAN MOTOR
FAN JOINT
SHAFT
SLEEVE BEARING
MOTOR LEG
SIROCCO FAN
SIROCCO FAN
SIROCCO FAN
CASING
INDOOR COIL THERMISTOR
ROOM TEMPERATURE THERMISTOR
HEATER ELEMENT
THERMAL SWITCH
THERMAL FUSE
INSULATOR
INSULATOR
HEAT EXCHANGER
HEAT EXCHANGER
DRAIN PAN ASSY
DRAIN PLUG
BEARING SUPPORT
FAN GUARD
FAN GUARD
FAN GUARD
FAN GUARD
PIECE (MOTOR)

D10B4P150MS

80V 1000W
OFF:50: ON:35:
110! 15A 250V

Q'ty / set Price

PCH-5 PCH-6

GKHSA

GKHSA

GKHSA

GKHSA

1

1
1
1
1
1
1
1
2
4
1
1
3
1
1
1
6

1
1
1
1
1
1
1
2
4
1
1
3
1
1
1
6

Remarks

(Drawing No.)

1

Wiring

Diagram

Symbol

MF

RT2
RT1

H
26H
FS1

Recom-

mended

Q'ty

Unit

1

1
1
1
1
1
2
1
1
1

1

1

1

1

2

1

1

1

Amount

72

No.

Parts No. Parts Name

Specifications

Wiring

Diagram

Symbol

Recom­mended

Q'ty

Unit

Amount

Q'ty / set Price

1
2
3
4

5

6
7
8

9

10
11
12

CONTROLLER BOARD
FUSE
TRANSFORMER
CONTROL BOX
CAPACITOR
RUN CAPACITOR
RUN CAPACITOR
TERMINAL BLOCK
TERMINAL BLOCK
TERMINAL BLOCK

BOX COVER

REMOTE CONTROLLER
REMOTE CONTROLLER CORD
RELAY

(BG00N015G14)

(BG02A804G12)
(BG02A804G13)
(BG02A804G14)

2

1
1
1
1
1

1
1
1
1

1
1
1

2.5/3

1
1
1
1

1

1
1
1

1

1
1
1

5/6

1
1
1
1

1
1
1
1

1

1
1
1

4

1
1
1
1

1

1
1
1

1
1
1
1

I.B

F1,2

T

C
C

C
TB2
TB4
TB5

R.B

250V 6.3A

3MF. 440V
4MF. 440V
6MF. 440V
3P (L,N, )
3P (1,2,3)
2P (1,2)

10m

JC-1A DC12V

Remarks

(Drawing No.)

T7W 71J 310
T7W 520 239

T7W 23J 260

­R01 30L 255
T7W 39J 255
T7W 43J 255
T7W 521 716
T7W 517 716
T7W 512 716

-

-

­T7W 14K 200
R01 08K 305
R01 71G 215

GKHA

GKHA

1

GKHA

GKHA

1

GKHSA

GKHSA

1

GKHSA
GKHSA

1

5

12

3

2

1

6

7

8

4

10

11

9

ELECTRICAL PARTS
PCH-2GKHA
PCH-2GKHA

1

PCH-2.5GKHA
PCH-2.5GKHA

1

PCH-3GKHA
PCH-3GKHA

1

PCH-4GKHSA
PCH-4GKHSA

1

PCH-5GKHSA
PCH-5GKHSA

1

PCH-6GKHSA
PCH-6GKHSA

1

73

13

OPTIONAL PARTS

Note 1. How to connect refrigerant pipes.

Factory supplied optional refrigerant pipings contain refrigerant at the above atmospheric pressures. As long as
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.
If piping length exceeds 5m, an additional charge of refrigerant in needed.

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

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

1. REFRIGERANT PIPES

Service Ref. : PCH-2GKHA1/PCH-2.5GKHA1/PCH-3GKHA1

Service Ref. : PCH-4GKHSA1/PCH-5GKHSA1/PCH-6GKHSA1

2. TIMER

Part No.

PAC-SC32PTA

3. CENTRALIZED REMOTE CONTROLLER

Allows individual or combined control of up to 16 units. When using this controller, a program timer adapter (PAC-

825AD) is also needed.

Part No. PAC-805RC

4. PROGRAM TIMER ADAPTER

This part is needed when a centralized remote controller (PAC-805RC) is used.

Part No. PAC-825AD

5. TIMER ADAPTER

This adapter is needed for system control and for operation via external contacts.

Part No. PAC-SA89TA-E

6. MULTIPLE REMOTE CONTROLLER ADAPTER

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

Part No. PAC-SA88HA-E

Optional parts connection is described in the service technical guide No.OCT01.

Model name Program timer (when set back function)

Part No.
Pipe length
Pipe size O.D.
Connection method

PAC-05FFS-E

5m

PAC-07FFS-E

7m

PAC-10FFS-E

10m

PAC-15FFS-E

15m

Liquid : {9.52 Gas : {15.88

Indoor unit : Flared Outdoor unit : Flared

Part No.
Pipe length
Pipe size O.D.
Connection method

PAC-SC51PI-E

5m

PAC-SC52PI-E

7m

PAC-SC53PI-E

10m

PAC-SC54PI-E

15m

Liquid : {9.52 Gas : {19.05

Indoor unit : Flared Outdoor unit : Flared

74

7.DRAIN PUMP

Part No.

PAC-SE85DM-E

Applied Service Ref.

PCH-2/2.5/3GKHA1

PAC-SE86DM-E

PCH-4/5/6GKHSA1

8.HIGH PERFORMANCE FILTER

Part No. PAC-SE80KF-E PAC-SE81KF-E PAC-SE82KF-E

Applicable Service Ref. PCH-2GKHA

1

PCH-2.5/3/4GK(H)SA

1

PCH-5/6GKHSA

1

Motor

Casing
(Inverted corn shape)

Drain water

Suction port

Flow of drain water

Rotating blabe
(Inverted triangle plate)

HEAD OFFICE MITSUBISHI DENKI BLDG.MARUNOUCHI TOKYO100 TELEX J24532 CABLE MELCO TOKYO

cCopyright 1997 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD.
Issued in Jun. 1997. No. OC135 140

New publication, effective Jun. 1997
Specifications subject to change without notice.