Mitsubishi Electric PLH Series Operating manual

TECHNICAL & SERVICE MANUAL
SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS
CONTENTS
1. FEATURES ···········································3
2. PART NAMES AND FUNCTIONS········5
3. SPECIFICATIONS·································7
4. DATA ···················································11
5. OUTLINES AND DIMENSIONS··········15
6. WIRING DIAGRAM·····························18
7. REFRIGERANT SYSTEM DIAGRAM ······19
8. OPERATION FLOW-CHART··············20
9. MICROPROCESSOR CONTROL·······24
10. TROUBLESHOOTING························47
11. 4-WAY AIR FLOW SYSTEM···············55
12. SYSTEM CONTROL···························60
13. DISASSEMBLY PROCEDURE···········65
14. PARTS LIST········································68
15. OPTIONAL PARTS·····························78
[Model names]
PLH-3GK(H)B
PLH-4GK(H)SB
PLH-5GK(H)SB
PLH-6GK(H)SB
No. OC148
1997
This manual does not cover the following
outdoor units. When servicing them,
please refer to the service manual
No.OC150 and this manual in a set.
[Service Ref.]
PUH-3YKA2.UK
PUH-3VKA2.UK
PUH-4YKSA2.UK
PUH-5YKSA2.UK
PUH-6YKSA2.UK
INDOOR UNIT
Ceiling Cassettes
Series PLH
FILTER
CHECK MODE
TEST RUN
REMOTE CONTROLLER The Slim Line.
From Mitsubishi Electric.
[Service Ref.]
PLH-3GK(H)B 1 .UK
PLH-4GK(H)SB
1 .UK
PLH-5GK(H)SB
1 .UK
PLH-6GK(H)SB
1 .UK

3
FEATURES
1
1.THE QUIETEST PERFORMANCE IN THE FIELD-39 PHONS(PLH-3GK(H)B.UK)
Excellent noise suppression is achieved because of the turbofan’s large diameter. Also wing-shaped vanes and a low-resis-
tance air flow desigh help to suppress noise.
2.FAN CONTROL ELIMINATES SUDDEN,SHARP NOISES
Sudden,sharp noises are eliminated by a fan control mechanism that smoothly and gradually increases rpms when the ther-
mostat switches the heater on or when the air conditioners in the dehumidifying“dry”mode.
3.VERSATILE AIR FLOW
Fan phase control and computer control allow a wide variety of air flow configurations. The optimal blown-air volume can be
chosen in accordance with the ceilling height and number of air vents at specific settings.
4.AUTOMATIC SETTING OF THE OPTIMAL AIR OUTLET ANGLE
The air outlet angle is altered automatically,to an almost horizontal angle of 20˚during cooling and an almost perpendicular
angle of 65˚during heating,to deliver the most comfort possible.This mechanism gives an even greater control over air flow.
5.NEXT-GENERATION AIR -CONDITIONING VENTILATION INTERLOCK SYSTEM
“Mr.SLIM” + “LOSSNAY”
Proper ventilation is important to improve the quality of indoor environments. lt eliminates unclean air,which is not only
unpleasant,but also unhealthy.
The“Mr.SLM”+“LOSSNAY”ventilation interlocking system achieves high air quality with minimum energy consumption.
LOSSNAY´s unique total heat exchanger reduces heating and cooling expenses by about 25 percent annually(in compari-
son with our exisiting models). ln addition,its mechanism of simultaneous forced air supply and exhaust enables it to deliver
high quality air.
Together the“Mr.SLIM”+“LOSSNAY”system makes next-generation air conditioning possible. This system is both people-and
environmental-friendly.
6.FLUCTUATING AIR CONTROL THAT ELIMINATES DRAFTS
A computerized fluctuating air control mechanism automatically controls the flow of air so that it feels natural and free of
drafts. Linkage with a swing mechanism sends a refreshing and natural breeze throughout the room. <Cooling><Air flow>
Indoor unit
Ceiling Cassettes
Series PLH
Remote controller
FILTER
CHECK MODE
TEST RUN
Service Ref.
PLH-3GK(H)B1.UK
PLH-4GK(H)SB1.UK
PLH-5GK(H)SB1.UK
PLH-6GK(H)SB1.UK
Cooling capacity/Heating capacity
Btu/h
26,300/28,700[35,800]
33,100/35,500[44,400]
42,300/45,700[56,000]
46,100/54,300[64,500]
W
7,700/ 8,400[10,500]
9,700/10,400[13,000]
12,400/13,400[16,400]
13,500/15,900[18,900]

4
7.INCREASED DEHUMIDIFICATION WITH FAN PHASE CONTROL NEW ELECTRONIC
DEHUMIDI-FIER OPERATION
A new electronic dehumidifier mode,where fan speed is controlled precisely by fan phase control,increases dehumidification
volume and raises dehumidifying effectiveness.This results in a pleasant environment all-year around,even during extended
rainy seasons.
8. A90˚GRILL SWITCHING MECHANISM MAKES INSTALLATION CONSIDERABLY EASIER (3HP)
The direction of the panel designs can be adjusted to match the interior desigh of the space in which tyey are being used.
This allows for greater flexibillty in air conditioning space and plumbing work.
9.HIGH-PERFORMANCE FILTER(colorimetric method:65%)OPTION
A high-performance filter can be installed(colorimetric method:65%)by setting the blown-air volume switch SWC.
10 .OUTSIDE AIR INCORPORATION
lnstallation of an outside air intake casement(option)allows fresh air
from outside to be incorporated with limited pressure loss.
11 .ADVANCED MICROPROCESSOR
(1)Easy to use microprocessor
1)Ultra-thin remote controller
The streamlinde,square controller is designed to blend well with
any interior.Also,the sophisticated microproceeor allows you to
easily carry out a wide range of operations.
2)Attractive liquid crystal display(LCD)
The unit´s operation mode,set temperature,room
temperature,timer setting,fan speed,louver oper-ation,and air flow
direction are displayed on the remote controller´s easy-to-read
Liquid Crystal Dis-play(LCD).
3)Convenient 24-hour ON-OFF timer
The timer switches Mr.SLIM on and off automati-cally at the time
you set. Once the timer is set,the remaining time is shown on the
LCD.
12 .INNOVATIVE SYSTEM CONTROL BY MICROPROCESSORS
The most significant feature of the series PLH-GK(H)(S)B is the advanced microprocessor control. The development of this
system is due to the recent world-wide trend in the air conditioning of larger buildings. They are moving away from central-
ized duct systems and using individual split type units instead. There are a number of reasons for this change. First of
all,the duct´s costly,and troublesome installation is eliminated. Second,the overall air conditioning balance is excellent in
split type units. Lastly,the operation costs are low due to the flexible control of each unit. This system was developed exclu-
sively by Mitsubishi Electric because of high demand. The microprocessor control makes individual control,group
control,control using two remote controllers,and remote on/off and individual control possible without trouble-some equip-
ment modifications.
FILTER
CHECK MODE
TEST RUN

5
PART NAMES AND FUNCTIONS
2
● Indoor (Main) Unit
On the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button.
Auto Air Swing Vane
Disperses airflow up and
down and adjusts the angle
of airflow direction.
Grill
Filters
Remove dust and pollutants
from inihaled air
Horizontal Air Outlet
Sets airflow horizontal automatically
during cooling or dehumidifying.
Downward Air Outlet
Sets airflow downward
automatically during
heating.
Air Intake
Inhales air from room.
FILTER
CHECK MODE
TEST RUN
● Operation buttons
● Remote controller
CHECK-TEST RUN button
Only press this button to per-
form an inspection check or test
operation Do not use it for
nomal operation.
(This button does not operate in this
model)
button
This switches the horizontal fan
motion ON and OFF.
FILTER button
This resets the filter service indica-
tion display.
ON/OFF button
This switches between the operation
and stop modes each time it is
pressed. The lamp on this butoon
lights during operation.
button
This adjusts the vertical angle of the
ventilation.
button
This sets the ventilation fan
speed.
button
This sets of switches the current
time. start time and stop time.
button
This switches between continuous
operation and the timer operation.
TEMP button
This sets the room temparature The
temparature setting can be per-
formed in 1°C units
Setting range
Cooler 19°C to 30°C
Heater 17°C to 28°C
button
Press this button to switch the cooler
electronic dry (dehumidify) automatic
and heater modes.
This model name of the remote con-
troller is indicated.

6
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 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
Operation lamp
This lamp lights during operation,
goes off when the unit stops and
flashes when amalfunction occurs.
CENTRALLY
CONTROLLED display
This indicates when the unit is con-
trolled 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 oper-
ation is performed.
CHECK display
This indicates when a malfunction
has occurred in the unit which should
be checked.
display
This lamp lights when electricity is
supplied to the unit.
display
This displays the selected setting
temperature.
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
The selected fan speed is displayed.
●Display
display
The temperature of the suction air is
displayed during operation. The dis-
play range is 8° to 39°C. The display
flashes 8°C when the actual temper-
ature is less than 8° and flashes
39°C when the actual temperature is
greater than 39°C.
In this display example on the bot-
tom left, a condition where all dis-
play lamps light is shown for expla-
nation purposes although this differs
from actual operation.
display
This display lights in the check mode
or when a test operation is per-
formed.
CHECK MODE
TEST RUN
display
This lamp lights when the filter need
to be cleaned.
FILTER
display
This displays the air
direction.

7
SPECIFICATIONS
3
Service Ref.
Power supply(phase, cycle,voltage)
External finish
Heat exchanger
Booster heater
Operation control & Thermostat
Noise level(Low-High)
Cond. drain conn. O.D.
Dimensions
Weight
Service Ref.
Power supply (phase, cycle, voltage)
External finish
Refrigerant control
Compressor
Heat exchanger
Defrost method
Noise level
Dimensions
Weight
Refrigerant
Pipe size O.D.
Connection method
Between the indoor & outdoor units
Input
Running current
Starting current
Fan(drive) x No.
Fan motor output
Airflow(Low-High)
External static pressure
Input
Running current
Starting current
Model
Motor output
Starter type
Protection devices
Fan(drive) x No.
Fan motor output
Airflow
Charge
W
D
H
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
Function
Capacity
Total input
INDOOR UNITOUTDOOR UNIT
REFRIGERANT
PIPING
Item Service Ref.
Btu/h
W
kW
kW
A
A
kW
K/ min (CFM)
Pa(mmAq)
kW
dB(A)
mm,(in)
mm,(in)
mm,(in)
mm,(in)
kg,(lbs)
kW
A
A
kW
kW
K/ min (CFM)
dB(A)
mm,(in)
mm,(in)
mm,(in)
kg,(lbs)
kg,(lbs)
mm,(in)
mm,(in)
PLH-3GK(H)B.UK
Cooling
26,300
7,700
3.31
Heating
28,700[35,800]
8,400[10,500]
3.10[5.20]
0.16
0.72
1.00
0.16[2.26]
0.72[9.5]
1.00[9.8]
UNIT : 820(32-1/4)
UNIT : 820(32-1/4)
UNIT : 258(10-1/8)
UNIT : 29(64)
PANEL : 950(37-3/8)
PANEL : 950(37-3/8)
PANEL : 65(2-9/16)
PANEL : 7(16)
3.15
13.82/5.16
58/37
2.94
12.89/4.81
58/37
PLH-3GK(H)B1.UK
Single, 50Hz, 220-240V
Galvanized sheets with gray heat insulation
Plate fin coil
Turbo fan (direct) x 1
0.050
14-18(495-640)
0(direct blow)
[2.1]
Remote controller & built-in
32-39
30(1-1/4)
PUH-3VKA2.UK/PUH-3YKA2.UK
Single, 50Hz, 220-240V/3, 50Hz, 380-415V(4wires)
Munsell 5Y 7/1
Capillary tube
Hermetic
NH52VND/NH52YDA
2.2/2.4
Line start
w1
Plate fin coil
Propeller (direct) x1
0.085
50(1764)
Reverse cycle
52
870(34-1/4)
295+24 (11-5/8 add 1)
850(33-1/4)
75(165)
R-22
3.2(7.1)
9.52 (3/8)
15.88(5/8)
Flared
Flared
Max. 50m
Max. 50m
wV …Internal Thermostat, HP switch
Y…Anti-phase protector, thermal relay, thermal switch, HP switch

8
Service Ref.
Power supply(phase, cycle,voltage)
External finish
Heat exchanger
Booster heater
Operation control & Thermostat
Noise level(Low-High)
Cond. drain conn. O.D.
Dimensions
Weight
Service Ref.
Power supply (phase, cycle, voltage)
External finish
Refrigerant control
Compressor
Heat exchanger
Defrost method
Noise level
Dimensions
Weight
Refrigerant
Pipe size O.D.
Connection method
Between the indoor & outdoor units
Input
Running current
Starting current
Fan(drive) x No.
Fan motor output
Airflow(Low-High)
External static pressure
Input
Running current
Starting current
Model
Motor output
Starter type
Protection devices
Fan(drive) x No.
Fan motor output
Airflow
Charge
W
D
H
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
Function
Capacity
Total input
INDOOR UNITOUTDOOR UNIT
REFRIGERANT
PIPING
Item Service Ref.
Btu/h
W
kW
kW
A
A
kW
K/ min (CFM)
Pa(mmAq)
kW
dB(A)
mm,(in)
mm,(in)
mm,(in)
mm,(in)
kg,(lbs)
kW
A
A
kW
kW
K/ min (CFM)
dB(A)
mm,(in)
mm,(in)
mm,(in)
kg,(lbs)
kg,(lbs)
mm,(in)
mm,(in)
PLH-4GK(H)SB1.UK
Cooling
33,100
9,700
3.46
Heating
35,500[44,400]
10,400[13,000]
3.45[6.05]
0.26
1.18
1.50
0.26[2.86]
1.18[12.0]
1.50[12.3]
UNIT : 1340(52-3/4)
UNIT : 820(32-1/4)
UNIT : 258(10-1/8)
UNIT : 45(99)
PANEL : 1470(57-7/8)
PANEL : 950(37-3/8)
PANEL : 65(2-9/16)
PANEL :10(22)
3.20
5.24
40
3.19
5.22
40
PLH-4GK(H)SB1.UK
Single, 50Hz, 220-240V
Galvanized sheets with gray heat insulation
Plate fin coil
Turbo fan (direct) x 2
0.050+0.050
23-32(810-1130)
0(direct blow)
[2.6]
Remote controller & built-in
34-42
30(1-1/4)
PUH-4YKSA2.UK
3, 50Hz, 380-415V(4wire)
Munsell 5Y 7/1
Capillary tube
Hermetic
NH56YDA
2.7
Line start
Anti-phasa protector, Thermal relay, Thermal switch, HP switch
Plate fin coil
Propeller (direct) x2
0.065+0.065
95(3550)
Reverse cycle
54
870(34-1/4)
295+24(11-5/8 add 1)
1258(49-1/2)
94(207)
R-22
4.2(9.2)
9.52(3/8)
19.05(3/4)
Flared
Flared
Max. 50m
Max. 50m

9
Service Ref.
Power supply(phase, cycle,voltage)
External finish
Heat exchanger
Booster heater
Operation control & Thermostat
Noise level(Low-High)
Cond. drain conn. O.D.
Dimensions
Weight
Service Ref.
Power supply (phase, cycle, voltage)
External finish
Refrigerant control
Compressor
Heat exchanger
Defrost method
Noise level
Dimensions
Weight
Refrigerant
Pipe size O.D.
Connection method
Between the indoor & outdoor units
Input
Running current
Starting current
Fan(drive) x No.
Fan motor output
Airflow(Low-High)
External static pressure
Input
Running current
Starting current
Model
Motor output
Starter type
Protection devices
Fan(drive) x No.
Fan motor output
Airflow
Charge
W
D
H
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
Function
Capacity
Total input
INDOOR UNITOUTDOOR UNIT
REFRIGERANT
PIPING
Item Service Ref.
Btu/h
W
kW
kW
A
A
kW
K/ min (CFM)
Pa(mmAq)
kW
dB(A)
mm,(in)
mm,(in)
mm,(in)
mm,(in)
kg,(lbs)
kW
A
A
kW
kW
K/ min (CFM)
dB(A)
mm,(in)
mm,(in)
mm,(in)
kg,(lbs)
kg,(lbs)
mm,(in)
mm,(in)
PLH-5GK(H)SB1.UK
Cooling
42,300
12,400
4.49
Heating
45,700[56,000]
13,400[16,400]
4.44[7.44]
0.28
1.27
1.50
0.28[3.28]
1.27[13.8]
1.50[14.0]
UNIT : 1340(52-3/4)
UNIT : 820(32-1/4)
UNIT : 258(10-1/8)
UNIT : 45(99)
PANEL : 1470(57-7/8)
PANEL : 950(37-3/8)
PANEL : 65(2-9/16)
PANEL :10(22)
4.21
6.89
53
4.16
6.81
53
PLH-5GK(H)SB1.UK
Single, 50Hz, 220-240V
Galvanized sheets with gray heat insulation
Plate fin coil
Turbo fan (direct) x 2
0.050+0.050
24-33(850-1165)
0(direct blow)
[3.0]
Remote controller & built-in
36-43
30(1-1/4)
PUH-5YKSA2.UK
3, 50Hz, 380-415V(4wire)
Munsell 5Y 7/1
Capillary tube
Hermetic
ZR61K3-TFD
3.5
Line start
Internal thermostat, Anti-phasa protector, Thermal switch, HP switch
Plate fin coil
Propeller (direct) x2
0.085+0.085
95(3550)
Reverse cycle
55
970(38-3/16)
345+24(13-9/16 add 1)
1258(49-1/2)
114(251)
R-22
5.4(11.9)
9.52(3/8)
19.05(3/4)
Flared
Flared
Max. 50m
Max. 50m

10
Service Ref.
Power supply(phase, cycle,voltage)
External finish
Heat exchanger
Booster heater
Operation control & Thermostat
Noise level(Low-High)
Cond. drain conn. O.D.
Dimensions
Weight
Service Ref.
Power supply (phase, cycle, voltage)
External finish
Refrigerant control
Compressor
Heat exchanger
Defrost method
Noise level
Dimensions
Weight
Refrigerant
Pipe size O.D.
Connection method
Between the indoor & outdoor units
Input
Running current
Starting current
Fan(drive) x No.
Fan motor output
Airflow(Low-High)
External static pressure
Input
Running current
Starting current
Model
Motor output
Starter type
Protection devices
Fan(drive) x No.
Fan motor output
Airflow
Charge
W
D
H
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
Function
Capacity
Total input
INDOOR UNITOUTDOOR UNIT
REFRIGERANT
PIPING
Item Service Ref.
Btu/h
W
kW
kW
A
A
kW
K/ min (CFM)
Pa(mmAq)
kW
dB(A)
mm,(in)
mm,(in)
mm,(in)
mm,(in)
kg,(lbs)
kW
A
A
kW
kW
K/ min (CFM)
dB(A)
mm,(in)
mm,(in)
mm,(in)
kg,(lbs)
kg,(lbs)
mm,(in)
mm,(in)
PLH-6GK(H)SB1.UK
Cooling
46,100
13,500
5.03
Heating
54,300[64,500]
15,900[18,900]
4.88[7.88]
0.30
1.36
1.50
0.30[3.30]
1.36[13.9]
1.50[14.0]
UNIT : 1340(52-3/4)
UNIT : 820(32-1/4)
UNIT : 258(10-1/8)
UNIT : 45(99)
PANEL : 1470(57-7/8)
PANEL : 950(37-3/8)
PANEL : 65(2-9/16)
PANEL :10(22)
4.73
7.74
74
4.58
7.50
74
PLH-6GK(H)SB1.UK
Single, 50Hz, 220-240V
Galvanized sheets with gray heat insulation
Plate fin coil
Turbo fan (direct) x 2
0.050+0.050
25-35(880-1235)
0(direct blow)
[3.0]
Remote controller & built-in
38-45
30(1-1/4)
PUH-6YKSA2.UK
3, 50Hz, 380-415V(4wire)
Munsell 5Y 7/1
Capillary tube
Hermetic
ZR68KC-TFD
4.0
Line start
Internal thermostat, Anti-phasa protector, Thermal switch, HP switch
Plate fin coil
Propeller (direct) x2
0.10+0.10
100(3530)
Reverse cycle
56
970(38-3/16)
345+24(13-9/16 add 1)
1258(49-1/2)
117(258)
R-22
5.0(11.0)
9.52(3/8)
19.05(3/4)
Flared
Flared
Max. 50m
Max. 50m

11
DATA
4
1. PERFORMANCE DATA
1) COOLING CAPACITY
Note C A :Capacity (W)
P.C.:Power consumption (kW)
Cooling capacity correction factors
P.C.
3.62
3.72
3.83
3.96
3.79
3.89
4.00
4.14
4.91
5.04
5.19
5.36
5.51
5.65
5.82
6.01
CA
6,342
6,793
7,270
7,773
7,989
8,558
9,159
9,792
10,249
10,964
11,720
12,516
11,159
11,937
12,759
13,626
P.C.
3.41
3.49
3.59
3.69
3.56
3.65
3.75
3.86
4.62
4.74
4.87
5.00
5.18
5.31
5.45
5.60
CA
6,671
7,130
7,616
8,128
8,404
8,982
9,594
10,240
10,771
11,497
12,266
13,078
11,726
12,517
13,355
14,238
P.C.
3.19
3.27
3.35
3.43
3.34
3.42
3.50
3.59
4.33
4.44
4.54
4.65
4.85
4.97
5.09
5.21
CA
6,983
7,452
7,948
8,470
8,797
9,388
10,012
10,670
11,245
12,001
12,799
13,640
12,243
13,065
13,935
14,851
P.C.
2.98
3.05
3.11
3.18
3.11
3.18
3.25
3.32
4.04
4.13
4.22
4.31
4.53
4.63
4.73
4.83
CA
7,278
7,760
8,267
8,799
9,168
9,775
10,414
11,085
11,720
12,496
13,313
14,170
12,760
13,605
14,494
15,427
P.C.
2.77
2.82
2.88
2.94
2.89
2.95
3.01
3.07
3.75
3.83
3.91
3.98
4.20
4.29
4.37
4.46
CA
7,555
8,053
5,573
9,115
9,518
10,145
10,800
11,482
12,167
12,969
13,806
14,679
13,246
14,119
15,031
15,981
P.C.
2.65
2.71
2.76
2.81
2.77
2.83
2.88
2.94
3.60
3.67
3.74
3.81
4.03
4.11
4.19
4.27
CA
7,768
8,271
8,779
9,293
9,786
10,419
11,060
11,707
12,510
13,319
14,138
14,965
13,619
14,501
15,392
16,293
20 Outdoor intake air DB°C 25 30 35 40 P.C.
3.84
3.94
4.07
4.23
4.02
4.12
4.26
4.43
5.21
5.35
5.53
5.74
5.84
5.99
6.19
6.43
CA
5,995
6,442
6,912
7,405
7,552
8,115
8,707
9,329
9,654
10,374
11,131
11,925
10,511
11,294
12,118
12,983
50 P.C.
3.93
4.03
4.17
4.35
4.11
4.22
4.36
4.54
5.33
5.47
5.66
5.90
5.97
6.13
6.34
6.60
CA
5,852
6,293
6,765
7,254
7,371
7,927
8,522
9,138
9,423
10,134
10,894
11,682
10,259
11,033
11,860
12,718
5245
Indoor
intake air
WB°C
16
18
20
22
16
18
20
22
16
18
20
22
16
18
20
22
Service Ref.
PLH-3GK(H)B1.UK
PLH-4GK(H)SB1.UK
PLH-5GK(H)SB1.UK
PLH-6GK(H)SB1.UK
Refrigerant piping length(one way)
5m
1.00
1.00
1.00
1.00
10m
0.981
0.989
0.981
0.975
15m
0.968
0.980
0.968
0.955
20m
0.952
0.970
0.952
0.935
25m
0.940
0.960
0.940
0.918
30m
0.925
0.950
0.925
0.900
35m
0.913
0.940
0.913
0.884
40m
0.900
0.930
0.900
0.869
45m
0.886
0.920
0.886
0.855
50m
0.874
0.910
0.874
0.840
Service Ref.
PLH-3GK(H)B1.UK
PLH-4GK(H)SB1.UK
PLH-5GK(H)SB1.UK
PLH-6GK(H)SB1.UK

12
2) HEATING CAPACITY
Note C A :Capacity (W)
P.C.:Power consumption (kW)
Heating capacity correction factors
P.C.
3.37
3.63
3.89
3.75
4.04
4.33
4.83
5.20
5.57
2.30
5.71
6.13
CA
10,752
10,340
10,044
13,312
12,802
12,435
17,152
16,494
16,022
20,352
19,572
19,011
P.C.
3.09
3.33
3.57
3.44
3.70
3.97
4.43
4.77
5.11
4.86
5.24
5.62
CA
9,595
9,235
8,928
11,880
11,434
11,054
15,307
14,732
14,242
18,163
17,480
16,900
P.C.
2.83
3.04
3.26
3.14
3.39
3.63
4.05
4.36
4.67
4.45
4.79
5.13
CA
8,516
8,198
7,895
10,543
10,150
9,774
13,584
13,078
12,594
16,119
15,518
14,943
P.C.
2.57
2.77
2.97
2.86
3.09
3.30
3.69
3.97
4.25
4.05
4.37
4.67
CA
7,514
7,231
6,944
9,303
8,953
8,597
11,987
11,535
11,077
14,224
13,687
13,144
P.C.
2.34
2.52
2.68
2.60
2.80
2.99
3.35
3.61
3.85
3.68
3.97
4.23
CA
6,593
6,334
6,077
8,163
7,842
7,524
10,517
10,104
9,694
12,479
11,989
11,502
P.C.
2.11
2.28
2.42
2.35
2.54
2.69
3.03
3.26
3.46
3.33
3.59
3.81
CA
5,752
5,508
5,293
7,122
6,820
6,554
9,177
8,787
8,444
10,889
10,426
10,020
-10 Outdoor intake air DB°C -5 0 5 10 15
Indoor
intake air
WB°C
15
20
25
15
20
25
15
20
25
15
20
25
Service Ref.
PLH-3GK(H)B1.UK
PLH-4GK(H)SB1.UK
PLH-5GK(H)SB1.UK
PLH-6GK(H)SB1.UK
Refrigerant piping length(one way)
5m
1.00
1.00
1.00
1.00
10m
1.00
1.00
1.00
1.00
15m
1.00
1.00
1.00
1.00
20m
1.00
1.00
1.00
1.00
25m
1.00
1.00
1.00
1.00
30m
1.00
1.00
1.00
1.00
35m
0.998
0.998
0.998
0.998
40m
0.995
0.995
0.995
0.995
45m
0.993
0.993
0.993
0.993
50m
0.990
0.990
0.990
0.990
Service Ref.
PLH-3GK(H)B1.UK
PLH-4GK(H)SB1.UK
PLH-5GK(H)SB1.UK
PLH-6GK(H)SB1.UK
Heating
1.4
1.2
1.0
0.8
0.6
1.4
1.2
1.0
0.8
0.6
0.4
-12-10 -5 0 5 10 15
OUTDOOR WB(°C)
INDOOR DB (°C)
INDOOR DB (°C)
15
20
25
25
20
15
TOTAL INPUT (RATIO) CAPACITY (RATIO)
Cooling
1.4
1.2
1.0
0.8
0.6
1.4
1.2
1.0
0.8
0.6
0.4
-5 5 15 253546
OUTDOOR DB(°C)
TOTAL INPUT (RATIO) CAPACITY (RATIO)
INDOOR WB(°C)
INDOOR WB(°C)
22
20
18
16
22
20
18
16
2. PERFORMANCE CURVE
PLH-3GK(H)B1.UK
PLH-4GK(H)SB1.UK/PLH-5GK(H)SB1.UK/PLH-6GK(H)SB1.UK

13
Input (kW)
Current (A)
Starting current (A)
Input (kW)
Current (A)
Starting current (A)
Mode
Capacity (W)
Total Input (kW)
IndoorOutdoor
PLH-3GK(H)B1.UKService Ref.
Cool
7,500
3.29
0.16
0.72
1.0
3.13
14.67/5.23
54/34
Heat
8,200
[9,950]
3.08
[4.83]
0.16
[1.91]
0.72
[8.7]
1.0
[9.0]
2.92
13.68/4.88
54/34
PLH-4GK(H)SB1.UK
Cool
9,500
3.43
0.26
1.18
1.5
3.17
5.29
37
Heat
10,200
[12,400]
3.42
[5.62]
0.26
[2.46]
1.18
[11.2]
1.5
[11.5]
3.16
5.28
37
PLH-5GK(H)SB1.UK
Cool
12,200
4.47
0.28
1.27
1.5
4.19
7.32
49
Heat
13,100
[15,620]
4.41
[6.93]
0.28
[2.80]
1.27
[12.7]
1.5
[13.0]
4.13
7.21
49
PLH-6GK(H)SB1.UK
Cool
13,300
4.94
0.30
1.36
1.5
4.64
8.10
68
Heat
15,500
[18,020]
4.86
[7.38]
0.30
[2.82]
1.36
[12.8]
1.5
[13.0]
4.56
7.96
68
3. ELECTRICAL DATA
Indoor unit …220V 50Hz 1phase
Outdoor unit…220V 50Hz 1phase / 380V 50Hz 3phase
Input (kW)
Current (A)
Starting current (A)
Input (kW)
Current (A)
Starting current (A)
Mode
Capacity (W)
Total Input (kW)
IndoorOutdoor
PLH-3GK(H)B1.UKService Ref.
Cool
7,600
3.30
0.16
0.72
1.0
3.14
14.22/5.21
56/36
Heat
8,300
[10,200]
3.09
[4.99]
0.16
[2.06]
0.72
[9.0]
1.0
[9.3]
2.93
13.27/4.86
56/36
PLH-4GK(H)SB1.UK
Cool
9,600
3.45
0.26
1.18
1.5
3.19
5.23
39
Heat
10,300
[12,700]
3.44
[5.84]
0.26
[2.66]
1.18
[11.6]
1.5
[11.9]
3.18
5.22
39
PLH-5GK(H)SB1.UK
Cool
12,300
4.48
0.28
1.27
1.5
4.20
7.05
51
Heat
13,250
[16,010]
4.43
[7.18]
0.28
[3.03]
1.27
[13.2]
1.5
[13.5]
4.15
6.97
51
PLH-6GK(H)SB1.UK
Cool
13,400
4.99
0.30
1.36
1.5
4.69
7.87
71
Heat
15,700
[18,450]
4.87
[7.62]
0.30
[3.05]
1.36
[13.3]
1.5
[13.5]
4.57
7.67
71
Indoor unit …230V 50Hz 1phase
Outdoor unit…230V 50Hz 1phase / 400V 50Hz 3phase
Input (kW)
Current (A)
Starting current (A)
Input (kW)
Current (A)
Starting current (A)
Mode
Capacity (W)
Total Input (kW)
IndoorOutdoor
PLH-3GK(H)B1.UKService Ref.
Cool
7,700
3.31
0.16
0.72
1.0
3.15
13.82/5.16
58/37
Heat
8,400
[10,500]
3.10
[5.20]
0.16
[2.26]
0.72
[9.5]
1.0
[9.8]
2.94
12.89/4.81
58/37
PLH-4GK(H)SB1.UK
Cool
9,700
3.46
0.26
1.18
1.5
3.20
5.24
40
Heat
10,400
[13,000]
3.45
[6.05]
0.26
[2.86]
1.18
[12.0]
1.5
[12.3]
3.19
5.22
40
PLH-5GK(H)SB1.UK
Cool
12,400
4.49
0.28
1.27
1.5
4.21
6.89
53
Heat
13,400
[16,400]
4.44
[7.44]
0.28
[3.28]
1.27
[13.8]
1.5
[14.0]
4.16
6.81
53
PLH-6GK(H)SB1.UK
Cool
13,500
5.03
0.30
1.36
1.5
4.73
7.74
74
Heat
15,900
[18,900]
4.88
[7.88]
0.30
[3.30]
1.36
[13.9]
1.5
[14.0]
4.58
7.50
74
Indoor unit …240V 50Hz 1phase
Outdoor unit…240V 50Hz 1phase / 415V 50Hz 3phase

14
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
Total
W
kW
V
A
V
A
MPa·G
(kgf/F·G)
MPa·G
(kgf/F·G)
°C
°C
°C
m
DB°C
WB°C
DB°C
DB°C
WB°C
PLH-3GK(H)B1.UK PLH-4GK(H)SB1.UK PLH-5GK(H)SB1.UK PLH-6GK(H)SB1.UKService Ref.
Cooling
7,700
3.31
Heating
8,400
3.10
13.82/5.16
2.06
(21.0)
0.46
(4.69)
88.0
53.5
4.6
5
27
19
12.6
35
24
0.67
0.24
12.89/4.81
1.86
(18.9)
0.34
(3.47)
83.4
—
-2.8
5
20
15
42.9
7
6
—
—
0.72 0.72
PLH-3GK(H)B1.UK
1,50
240
PLH-4GK(H)SB1.UK
1,50
240
PLH-5GK(H)SB1.UK
1,50
240
PLH-6GK(H)SB1.UK
1,50
240
PUH-3VKA2.UK
PUH-3YKA2.UK
1/3,50
240/415
Cooling
9,700
3.46
Heating
10,400
3.45
5.24
1.80
(18.4)
0.53
(5.41)
74.2
48.3
8.1
5
27
19
14.7
35
24
0.78
0.15
5.22
1.61
(16.4)
0.36
(3.67)
69.8
—
-1.3
5
20
15
36.5
7
6
—
—
1.18 1.18
PUH-4YKSA2.UK
3,50
415
Cooling
12,400
4.49
Heating
13,400
4.44
6.89
1.88
(19.2)
0.48
(7.96)
79.7
49.8
5.1
5
27
19
13.2
35
24
0.74
0.13
6.81
1.88
(19.2)
0.37
(3.77)
83.8
—
-1.4
5
20
15
42.3
7
6
—
—
1.27 1.27
PUH-5YKSA2.UK
3,50
415
Cooling
13,500
5.03
Heating
15,900
4.48
7.74
1.76
(18.0)
0.46
(4.69)
78.4
46.9
4.4
5
27
19
12.4
35
24
0.70
0.11
7.50
1.79
(18.3)
0.37
(3.77)
81.3
—
-1.0
5
20
15
42.9
7
6
—
—
1.36 1.36
PUH-6YKSA2.UK
3,50
415
Electrical circuitRefrigeran circuit
Indoor
side
Outdoor
side
Air flow
Air speed
Coverage rangem

K/s
m/W
m
PLH-4GK(H)SB1.UK
32
5.2
8.5
PLH-3GK(H)B1.UK
18
5.3
6.5
PLH-6GK(H)SB1.UK
35
5.7
9.0
PLH-5GK(H)SB1.UK
33
5.4
8.7
Standard
4. STANDARD OPERATION DATA
5. OUTLET AIR SPEED AND COVERAGE RANGE
wThe air coverage range is the value up to the position where the air speed is 0.25m/sec.
When air is blown out horizontally from the unit at the Hi notch position.
The coverage range should be used only as a general guideline since it varies according to the size of the room and the
furniture inside the room.
The unit of pressure has been changed to Mpa based on the international SI system.
The conversion factor is : 1(Mpa·G)=10.2(kgf/FF·G)

15
OUTLINES AND DIMENSIONS
5
1. INDOOR UNIT PLH-3GK(H)B1.UK Unit : mm (inch)
35(1-3/8) 75(2-15/16)
55(2-5/32) Inspection hole
(drain water lift-up mechanism)
Refrigerant pipe(15.88mmdia.)
flared connection 5/8F
flared connection 3/8F
62(2-7/16)
160(6-5/16)
220(8-21/32)
250(9-27/32)
Refrigerant pipe (9.52mm dia.)
A
Drain pipie VP-25 connection
Suspension bolt pitch
Suspension bolt pitch
785(30-29/32)
TERMINAL BLOCK
TERMINAL BLOCK
30(1-3/16)
(
Drain pipe inserting length
)
60(2-3/8)
66(2-19/32)
192(7-9/16) 192(7-9/16)
820(32-9/32)
820(32-9/32)
72(2-27/32)
530(20-7/8)
192(7-9/16)192(7-9/16)
890(35-1/32)Ceiling hole
890(35-1/32)Ceiling hole
30(1-3/16) 30(1-3/16)
30(1-3/16) 30(1-3/16)
Wiring arrangement opening
A
Branch duct hole (knock out hole)
Bar ring hole
Ceiling side
70-85
Suspension bolt
lower edge
61 61
104 104
w298(11-23/32)
45
25 190
110
5
65
12- 2.8
65
100
Suspension boltM10 or W3/8
wNote that the space between the ceiling panel of the unit and ceiling slab must be 10 to 15mm to be left.
300(11-13/16)
587(23-1/8)
<Air intake hole> Grill
4-Auto vane
<Air outlet hole>
<Air outlet hole>
587(23-1/8)
587(23-1/8)
Air intake grill
53(2-3/32)
80(3-5/32)
587(23-18)
<Air outlet hole>
950(23-1/8)
Vane motor
Wiring arrangement opening side
950(37-13/32)
80(3-5/32)
53 (2-3/32)
Refrigerant piping side
High efficiency filter(option)
175(6-7/8)<245(245(9-21/32)>
65(2-9/16)<135(5-5/16)>
363(14-9/32)<433(17-1/16)>
45(1-25/32)
Wiring arrangement opening side
Intake grille opening/ closing side(Factory setting)
(Ckanged by 90 )
Intake grille opening/ ciosing side (Factory setting)
Refrigerant piping side
Note
1. For drainage piping use VP-25 PVC piping. 2. For suspension bolts use M10 or W3/8 screws. 3. Figure 890X890 ceiling holes are standard but the ceiling holes for
860X860-910X910 can also be installed.
4. If installing the optional high efficiency filter element (filter casement),the
dimension between the transom and ceiling should be more than 365mm.
5. If installing the optional fresh air intake casement, the dimension
between the transom and ceiling should be more than 435mm.
6. The intake grill and its air filter´s opening /closing direction can be
changed. See table 1. <Dimensions inside parentheses apply to installing the optional fresh air intake casement.>
Intake gnill Intake air filter
OO
XX
Changed by 90°
Changed by 180°
<Table 1>

16
PLH-4GK(H)SB1.UK
PLH-5GK(H)SB1.UK
PLH-6GK(H)SB1.UK
Suspension bolt pitch
Suspension bolt pitch
1305(51-3/8)
TERMINAL BLOCK
TERMINAL BLOCK
30(1-3/16)
(
Drain pipe inserting length
)
60(2-3/8)
66(2-19/32)
192(7-9/16) 192(7-9/16)
1340(52-3/4)
820(32-9/32)
77(3-1/32)
530(20-7/8)
192(7-9/16)192(7-9/16)
890(35-1/32)Ceiling hole
1410(55-1/2) Ceiling hole
30(1-3/16) 30(1-3/16)
30(1-3/16) 30(1-3/16)
Wiring arrangement opening
AwNote that the space between the ceiling
panel of the unit and ceiling slab must be 10 to 15mm to be left.
1107(43-19/32)
<Air intake hole>
Grill
4-Auto vane
<Air outlet hole>
<Air outlet hole>
587(23-1/8)
587(23-1/8)
53
1107(43-19/32)
<Air outlet hole>
1470(57-7/8)
Vane motor
Wiring arrangement opening side
950(37-13/32)
80(3-5/32)
53 (2-3/32)
Refrigerant piping side
Branch duct hole (knock out hole)
Bar ring hole
Ceiling side
70-85
Suspension bolt
lower edge
61 61
104 7 104(=728)
w298(11-23/32)
45
25 190
110
5
22- 2.8
Suspension boltM10 or W3/8
442(17-13/32) 410(16-5/32)410(16-5/32)
300(11-13/16)
100
6565
Do not peel off the insulation here.
Leave this bar ring hole.
Intake grill opening/ closing side(Factory setting)
Air intake grill
80
35(1-3/8) 75(2-15/16)
55(2-5/32) Inspection hole
(drain water lift-up mechanism)
Refrigerant pipe(19.05mmdia.)
flared connection 3/4F
flared connection 3/8F
62(2-7/16)
160(6-5/16)
220(8-21/32)
250(9-27/32)
Refrigerant pipe (9.52mm dia.)
A
Drain pipie VP-25 connection
High efficiency filter(option)
175(6-7/8)<245(245(9-21/32)>
65(2-9/16)<135(5-5/16)>
363(14-9/32)<433(17-1/16)>
45(1-25/32)
Note
1. For drainage piping use VP-25 PVC piping. 2. For suspension bolts use M10 or W3/8 screws. 3. Figure 890X1,410 ceiling holes are standard but the ceiling holes for
860X1,380-910X1,430 can also be installed.
4. If installing the optional high efficiency filter element (filter casement),the
dimension between the transom and ceiling should be more than 365mm.
5. If installing the optional fresh air intake casement, the dimension
between the transom and ceiling should be more than 435mm.
6. The intake grill and its air filter´s opening /closing direction can be
changed. See table 1. <Dimensions inside parentheses apply to installing the optional fresh air intake casement.>
Intake gnill Intake air filter
XX
OO
Changed by 90°
Changed by 180°
<Table 1>
Unit : mm (inch)

17
Unit : mm
2. REMOTE CONTROLLER
18
130
Rear side wiring arrangement opening.
120
FILTER
CHECK MODE
TEST RUN
FILTER
CHECK MODE
TEST RUN
46
83.5
SW18
SW17
CAUTION

18
6WIRING DIAGRAM
SYMBOL
C1.2
CN1<R.B>
CN2<R.B>
CN2L<I.B>
CN51<I.B>
OP
DS
F<I.B>
F.C<I.B>
FS1.2
H1
H2
I.B
LS
MF1.2
MV
RB
RT1
RT2
NAME
FAN MOTOR CAPACITOR
PROGRAM TIMER CONNECTOR
REMOTE SWITCH CONNECTOR
LOSSNAY CONNECTOR
CENTRALLY CONTROL CONNECTOR
DRAIN WATER LIFT-UP MECHANISM
DRAIN SENSOR
FUSE(6A)
FAN PHASE CONTROL
THERMAL FUSE
HEATER
DEW PREVENTION HEATER
INDOOR CONTROLLER BOARD
LIMIT SWITCH
FAN MOTOR (INNER THERMOSTAT)
VANE MOTOR
REMOTE CONTROLLER BOARD
ROOM TEMPERATURE THEARMISTOR
(0°C/15kΩ,25°C/5.4kΩ)
INDOOR COIL THEARMISTOR
(0°C/15kΩ,25°C/5.4kΩ)
SYMBOL
SW1<I.B>
SW2<I.B>
SW3<I.B>
SW6<I.B>
SW5,7<I.B>
SWA<I.B>
SWB<I.B>
SWC<R.B>
SW17<I.B>
SW18<I.B>
T
TB2~5
X1<I.B>
X3<I.B>
X4<I.B>
ZNR
26H
88H
NAME
MODE SELECTOR
ADDRESS SELECTOR
EMERGENCY OPERATION SWITCH
ADDRESS SELECTOR
MODEL SELECTOR
HIGH CEILING TYPE SWITCH
OUTLETS OF THE NUMBER OF DIS-
CHERGE OUTRETS SWITCH
COMPATIBLE WITH OPTION SWITCH
ADDRESS SELECTOR
FUNCTION SELECTOR
TRANSFORMER
TERMINAL BLOCK
DRAIN WATER LIFT-UP MECHANISUM
DEW PREVENTION HEATER RELAY
VANE MOTOR RELAY
FAN MOTOR RELAY
VARISTOR
HEATER THERMAL SWITCH
HEATER CONNECTOR
N
L
V
Showing fig: w 1
F
INTAKE
CN20
BLU
Indoor unit I.B
C2 C1
(WHT)
FAN1
531
BLK RED WHT
2134
RED WHT WHT BLK
MF2 MF1
321
321
For
PLH-4,5,6
BG79J990H03
5GK(H)SB
6GK(H)SB
3GK(H)B
4GK(H)SB
SW7MODELS
123
123
OFF
OFF
ON
123OFF
ON
ON
fig: w 3

FAN2
(WHT)
135
ZNR
X3
X4
FAN CON
FAN1
X4
53
(WHT) 1(WHT)
13
CND
BLK RED
RED WHT BLK
123
C1
RED WHT BLK
MF1 1
32
MV
LS
BLU
YLW YLW
BLU
H2
1526
RED RED BLU
YLW
DP
124613 (WHT)
(BLU)
VANE D HEATERDRAIN-UP CNVCNP
X3
X1
X1
CENTRALLY
CONTROLL
CN51
CN41
HA
YLW
RED
13(WHT)
CNT
TRANS
HEATER
VANE
POSITION
LOSSNAY
CN2L
(RED)(GRN) (YLW) CN4T
CN24CN23
BRN
RED
BRN
AC
11.3
AC
15.4
37
BRN
V
YLW
ORN
RED
T
GRILLE
DS
RT2RT1
BLK GRY
1234
1234 (WHT)(WHT)(RED)
DRAIN
CN50
PIPE
CN21
SWC
SWB
SWA
Showing fig:
w 3

21432143216543 OFF
ON
21
10987654321321 SW5SW6SW2
OFF
ON
SW3SW1SW7
YLW ORN BRN
123 4123
REMOCON
POWER
(WHT)
CN40
(WHT)
OUT
DOOR
CN30
TO
REMOCON
CN22
(WHT)
1
2
TB5
87654321
4321 ON
OFF
ON
OFF
321
43215CN2
TB6
CN1
21 B02
A01
SW18
SW17
R.B
Remote Controller
TRANSMISSION WIRES DC12V
TO OUTDOOR UNIT
CONNECTING WIRES
DC12V(polar) 1
2
3
TB4
GRN/YLW
BLU
RED
POWER SUPPLY
(1 phase)
220-240V 50Hz
220V 60Hz
w
TB2
BRN
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 (SW5<1.B>)on the indoor con-
troller board showing fig: w1.
Indoor fan motor (MF1.2)for 220V.
2. Since the indoor transformer (T)is connected with 240V power.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 out-
door unit electric wiring for servicing.
When power supply is
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. :PC board insertion tab.
5. Emergency operation
If a trouble occurs with either the remote controller or the indoor microcom-
puter no other truble exists. emergency operation for cooling or heating can
be performed by changing the setting of dip switch (SW3<I.B>) on the
indoor controller board.
(emergency dry operation is not possible.)
[Check items]
(1)Make sure that no other trouble exist the outdoor unit. Trouble with the out-
door 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 con-
troller 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 run with power ON/OFF (ON/OFF
with the remote controller is not possible).
[Emergency operation procedure]
(1)Switch the fan connector on the indoor controller board from FAN 1 to FAN 2.
(2)Set the dip switch (SW3<I.B>) on the indoor controller board to 1on and 2
off for cooling and 1- 2on for heating.
(3)Turn on the outdoor unit side circuit breaker, then the indoor unit side circuit
breaker.
(4)During emergency operation indoor fan runs at High speed but auto-vane
does not work.
(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)After every emergency operation, switch the fan connector to FAN1, and set
all dip switches (SW3<I.B>) to OFF.
NOTE: If the drain water lift up mechanism is identified to be defective with the
microcomputer doctor during cooling, do not use emergency operation
(it causes drain overflow)
240
230
220
230V
220V
YELLOW
ORANGE
RED
fig w1
fig w2
1
ON
OFF 2 3 4 1
ON
OFF 2 3 4
PLH-3GK(H)B1.UK/PLH-5GK(H)SB1.UK
PLH-4GK(H)SB1.UK/PLH-6GK(H)SB1.UK
SW5 SW5

19
REFRIGERANT SYSTEM DIAGRAM7
Indoor unit
Indoor
heat
exchanger
Refrigerant pipe
(option)
15.88mm( 5/8")
(with heat insulator)
Flexible tube
Ball valve
Strainer
4-way valve
Oil separator
Service
port
Service
port
Control
high pressure
switch
Outdoor unit
Outdoor heat exchanger
Thermistor
TH
Capillary
tube
Restrictor
valve
PUH-3 O.D.4.0 oI.D.2.4 -r1,070
Strainer
Bypass
valve
Compressor
Accumulator
Ball valve
(with service port)
Refrigerant pipe
(option)
9.52mm( 3/8")
(with heat insulator)
Capillary
tube
Restrictor
valve
Distributor
with
strainer
Thermistor
RT2
Strainer Flared
connection
Refrigerant flow in cooling
Refrigerant flow in heating
<R.V.coil>
Heating ON
Cooling OFF
Unit : mm
PLH-3 O.D.3.2 oI.D.2.0 -r400
Protect high Pr.SW
PLH-3GK(H)B1.UK/PUH-3VKA2.UK
PUH-3YKA2.UK
PLH-4GK(H)SB1.UK/PUH-4YKSA2.UK
PLH-5GK(H)SB1.UK/PUH-5YKSA2.UK
PLH-6GK(H)SB1.UK/PUH-6YKSA2.UK
Indoor unit
Indoor
heat
exchanger
Refrigerant pipe
(option)
19.05mm([3/4")
(with heat insulator)
Flexible tube
Ball valve
Strainer
4-way valve
Oil separator
Service
port
Service
port
Outdoor unit
Outdoor heat exchanger
Thermistor
TH3
Capillary
tube
Restrictor
valve
Strainer
Bypass
valve
Compressor
Accumulator
Ball valve
(with service port)
Refrigerant pipe
(option)
9.52mm([ 3.8")
(with heat insulator)
Capillary
tube
Restrictor
valve
Distributor
with
strainer
Thermistor
RT2
Strainer Flared
connection
(O.D.3.2 oI.D. 2.0 -r820)X2
(O.D.3.2 oI.D. 2.0 -r250)
Control
high pressure
switch
Protect
high Pr.
SW
PUH-4
Indoor unit
Indoor
heat
exchanger
Refrigerant pipe
(option)
19.05mm([ 3/4")
(with heat insulator)
Flexible tube
Ball valve
Strainer
4-way valve
Oil
separator
Service
port
Service
port
Outdoor unit
Outdoor heat exchanger
Thermistor
TH
Capillary tube
Restrictor
valve
Strainer
Bypass
valve
Compressor
Accumulator
Ball valve
(with service port) Thermal Switch
Refrigerant pipe
(option)r
9.52mm([ 3/8")
(with heat insulator)
Capillary
tube
Restrictor valve
Distributor
with
strainer
Thermistor
RT2
Strainer Flared
connection
PLH-5 O.D.4.0 oI.D.2.4 -r350
Capillary tube
PUH-5 (O.D.4.0 oI.D. 2.4 -r840) o2
PUH-6 (O.D.4.0 oI.D. 2.4 -r1200) o2
PLH-6 O.D.4.0 oI.D. 2.4 -r300
Control
high pressure
switch
Protect
high Pr.
SW

20
8 OPERATION FLOW-CHART
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
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
w 1
w 2
w 3
w 4
w 5
w 7
w 6
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
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.)