Mitsubishi Electric Mr.Slim PKH18FL Operating manual

TECHNICAL & SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
CONTENTS
1. FEATURES ·······························································2
2. PART NAMES AND FUNCTIONS····························3
3. SPECIFICATIONS·····················································4
4. DATA·········································································5
5. OUTLINES AND DIMENSIONS······························16
6. REFRIGERANT SYSTEM DIAGRAM ····················18
7. WIRING DIAGRAM·················································19
8. OPERATION FLOW-CHART··································20
9. MICROPROCESSOR CONTROL···························24
10. TROUBLESHOOTING············································41
11. DISASSEMBLY PROCEDURE ·······························45
12. PARTS LIST····························································48
TM
PKH18FL
PKH24FL
PKH30FL
PKH36FL
No. OC276
REVISED EDITION-A
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Wall Mounted
Series PKH
[Models]
Indoor unit
Remote controller
MODEL
SELECT
NOT AVAILABLE
SWING
CHECK
FAN
TEST
RUN
˚F
˚C
AMPMSTOP
START
Revision:
●The wrong descriptions in REFRIGERANT
SYSTEM DIAGRAM have been modified.
(Page 18.)
●The wrong descriptions in WIRING DIAGRAM
have been modified.
(Page 19.)
●Restrictor valve and capillary tube have been
added to "Specifications" of heat exchanger.
(Page 48.)
●Please void OC276.
OC276-A-1.qxp 03.11.25 9:04 AM Page 1

2
1FEATURES
Indoor unit
Remote controller
Models Cooling capacity / Heating capacity SEER
PKH18FL 18,000 / 18,600 [25,100] Btu/h 11.1
PKH24FL 24,000 / 25,000 [31,500] Btu/h 10.2
PKH30FL 30,000 / 33,000 [40,500] Btu/h 10.6
PKH36FL 34,200 / 38,000 [45,500] Btu/h 10.5
1. COMPACT DESIGN
The PKH series models have been downsized and now require such minimal wall space that they can even be installed
above windows.
2. LCD WIRELESS REMOTE CONTROLLER
The new wireless remote controller has a larger easy-to-read temperature display, and executes ON/OFF commands
and temperature settings with a press of the button.
3. AUTO FLAP SHUTTER
With a simple flick of the OFF switch the air outlet can be closed off with a shutter. The shutter also functions as a flap
during operation to adjust the air flow angle, with “Auto Angle 1” securing a comfortable air flow.
4. INSTALLATION : FAST AND EASILY ADAPTABLE
(1) Multi-directional piping
Multi directional drain and refrigerant piping radically improves flexibility in selecting installation layouts.
PKH18/24/30/36FL models boast refrigerant piping in 4 directions and drain piping in 2 directions.
(2) Back plate installation guide
The back plate installation guide gives clear instructions on installation positions. The enlarged back plate secures the
unit firmly to the wall, while the support piece which lifts the unit makes left side piping work much easier.
(3) Easily removable filter and convenient wireless remote controller
The presence of thumb screws on the filters means that the filters can be quickly and smoothly removed.
5. HIGH RELIABILITY AND EASY SERVICING
In addition to the self-diagnostic function, units are also equipped with a 3-minute time delay mechanism (cooling), an auto
restart function, an emergency operation function, a test run switch, etc., to assure high reliability and easy servicing.
6. NITROGEN GAS IS CHARGED TO INDOOR UNIT
Indoor unit and refrigerant pipes are charged with nitrogen gas (N2) instead of R22 before shipment from the factory.
MODEL
SELECT
NOT AVAILABLE
SWING
CHECK
FAN
TEST
RUN
˚F
˚C
AMPMSTOP
START
OC276-A-1.qxp 03.11.25 9:04 AM Page 2

3
PART NAMES AND FUNCTIONS2
●Wireless remote controller
●When cover is open.
ON/OFF TEMP
FAN
VANE
TEST RUN
AUTO STOP
AUTO START
h
min
LOUVER
MODE
CHECK
RESETSET CLOCK
MODEL
SELECT
NOT AVAILABLE
SWING
CHECK
FAN
TEST
RUN
˚F
˚C
AMPMSTOP
START
AMPM
COOL
DRY
AUTO
FAN
HEAT
VANE CONTROL button
Used to change the air flow direction.
CLOCK button
RESET button
SET button
ON/OFF button
The unit is turned ON and OFF alternately
each time the button is pressed.
LOUVER button
This switch the horizontal fan motion ON
and OFF.
(Not available for this model.)
MODE SELECT button
Used to switch the operation mode between
cooling, drying, fan.
CHECK-TEST RUN button
Only press this button to perform an inspec-
tion check or test operation.
Do not use it for normal operation.
FAN SPEED SELECT button
Used to change the fan speed.
TIMER display
Displays when in timer operation or when
setting timer.
button
SET TEMPERATURE button sets any desired
room temperature.
CLOCK display
Displays the current time.
“” “ ” display
Displays the order of timer operation.
“ ” “ ” display
Displays whether timer is on or off.
Buttons used to set the “hour and minute” of
the current time and timer settings.
h and min buttons
88°F display
SET TEMP. display indicates desired temper-
ature set.
display
FAN SPEED display indicates which fan
speed has been selected.
display
The vertical direction of air flow is indicated.
display
Blinks when model is selected.
display
Lights up while transmission to the indoor
unit is mode using switches.
display
CHECK&TEST RUN display indicates that
the unit is being checked or test-run.
OPERATION MODE display
OPERATION MODE display
Operation mode display indicates which op-
eration mode is in effect.
TIMER CONTROL buttons
AUTO STOP (OFF timer): when this switch
is set, the air conditioner will be au-
tomatically stopped at the preset time.
AUTO START (ON timer): when this switch
is set, the air conditioner will be automatical-
ly started at the preset time.
MODEL SELECT
CHECK TEST RUN
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4
3 SPECIFICATIONS
FK1:48 -41
Capacity
Moisture removal
Power
Consumption
EER
SEER
HSPF
COP
INDOOR UNIT MODELS
External finish
Power supply
Max.fuse size (time delay)
Min.ampacity
Fan motor
Booster heater
Airflow Hi-Lo
Sound level Hi-Lo
Unit drain pipe O.D.
Dimensions
Weight
OUTDOOR UNIT MODELS
External finish
Power supply
Max.fuse size (time delay)
Min.ampacity
Fan motor
Compressor
Crankcase heater
Refrigerant control
Defrost method
Sound level
Dimensions
Weight
REMOTE CONTROLLER
Control voltage (by built-in transformer)
REFRIGERANT
REFRIGERANT PIPING
Pipe size
Connection
method
Between the indoor
& outdoor units
Cooling *1
Heating *1
Heating *2
Cooling *1
Heating *1
Heating *2
*1
*1
*2
Dry
Wet
W
D
H
Model (type)
W
D
H
Name
Charge
Oil <Model>
Liquid
Gas
Indoors
Outdoors
Height difference
Piping length
Btu/h
Btu/h
Btu/h
Pints/h
kW
kW
kW
V,phase,Hz
A
A
F.L.A.
A(kW)
CFM
CFM
dB
in.
in.
in.
in.
lb
V,phase,Hz
A
A
F.L.A.
R.L.A.
L.R.A.
A(W)
dB
in.
in.
in.
lb
L
in.
in.
ft
ft
PKH18FL
Model
18,000
18,600[24,100/25,100]
10,700[16,200/17,200]
5.3
1.79
1.56[3.16/3.46]
1.34[2.94/3.24]
10.1
11.1
7.2
3.5
2.3
PKH18FL
57
PUH18EK
20
16
0.75
RH247NAB
12
37
0.11/0.12[23/28]
53
33-1/2
131
5 lbs 8 oz
0.52 <MS-56>
130
130
PKH24FL
24,000
25,000[30,500/31,500]
14,700[20,200/21,200]
7.0
2.36
2.37[3.97/4.27]
1.92[3.52/3.82]
10.2
10.2
6.8
3.1
2.2
PKH24FL
Munsell 3.4Y 7.7/0.8
208/230,1,60
57
PUH24EK1
Munsell 5Y 7/1
208/230,1,60
20
16
0.65+0.65
NH33NBD
11.5
54
0.16/0.17[33/39]
Capillary tube
Reverse cycle
55
49-9/16
202
With indoor unit
Indoor unit-remote controller:DC12V. Indoor unit-outdoor unit:DC12V
R22
9 lbs 15 oz
1.2 <MS32N-1>
Not supplied(optional parts)
Flared
Flared
9-1/4
13-3/8
PKH30FL
30,000
33,000[39,100/40,500]
19,000[25,100/26,500]
9.1
3.12
3.02[4.82/5.22]
2.48[4.28/4.68]
9.6
10.6
7.1
3.2
2.2
PKH30FL
FK1:49-44
66
PUH30EK1
30
20
0.75+0.75
NH41NAD
14.0
73
0.16/0.17[33/39]
55
38-3/16
13-9/16
49-9/16
245
10 lbs 2 oz
1.3 <MS32N-1>
1/2
3/4
PKH36FL
34,200
38,000[44,100/45,500]
19,600[25,700/27,100]
10.5
3.44
3.54[5.34/5.74]
2.65[4.45/4.85]
9.9
10.5
6.9
3.1
2.2
PKH36FL
FK1:50-46
66
PUH36EK1
30
22
0.75+0.75
NH47NAD
17.5
87
0.16/0.17[33/39]
55
38-3/16
13-9/16
49-9/16
246
10 lbs 9 oz
1/2
3/4
164
164
Item
34-1/4
11-5/8
3/8
5/8
164
164
55-1/8 66-5/32
NOTES : *1.Rating conditions (cooling)-indoor : 80˚FDB,67˚FWB outdoor : 95˚FDB,75˚FWB.
(heating)-indoor : 70˚FDB,60˚FWB outdoor : 47˚FDB,43˚FWB.
*2.Rating conditions (heating)-indoor : 70˚FDB,60˚FWB outdoor : 17˚FDB,15˚FWB.
*3.Heating capacity and power consumption in [ ] includes heater operation at 208/230V.
Operating range
Indoor intake air temperature
95˚FDB,71˚FWB
67˚FDB,57˚FWB
80˚FDB,67˚FWB
70˚FDB,60˚FWB
Outdoor intake air temperature
115˚FDB
0˚FDB *
75˚FDB,65˚FWB
17˚FDB,15˚FWB
Cooling
Heating
Maximum
Minimum
Maximum
Minimum
1-1/16 (or 7/8)
15
12 13
0.5 0.6
7.6/8.4[1.6/1.9]
710-530
640-480
8.7/9.6[1.8/2.2]
990-780
890-700
*In case of the wind baffle is installed.
(In case of the wind baffle is not installed, the minimum temperature will be 23˚FDB.)
MODELS : PKH18FL, PKH24FL, PKH30FL, PKH36FL
OC276-A-1.qxp 03.11.25 9:04 AM Page 4

5
DATA
4
Models
Models Outdoor intake air DB temperature(˚F)
PKH18FL
71
67
63
62.5
60
59
71
67
63
62.5
60
59
71
67
63
62.5
60
59
71
67
63
62.5
60
59
TC
21.0
19.5
18.2
18.1
17.2
16.8
27.9
26.1
24.3
24.1
23.0
22.5
34.9
32.6
30.4
30.2
28.8
28.2
39.8
37.1
34.7
34.4
32.8
32.2
SHC
14.4
16.0
17.4
15.5
15.1
14.5
16.1
18.5
20.5
18.0
17.6
17.0
21.5
24.5
26.9
23.8
23.2
22.4
23.0
26.3
29.3
25.8
25.1
24.3
TPC
1.56
1.52
1.49
1.49
1.47
1.46
2.05
2.01
1.97
1.96
1.94
1.93
2.72
2.66
2.60
2.59
2.57
2.56
3.00
2.93
2.87
2.86
2.82
2.81
TC
20.2
18.8
17.5
17.4
16.6
16.2
26.9
25.1
23.4
23.2
22.1
21.7
33.7
31.4
29.2
29.0
27.6
27.0
38.4
35.7
33.3
33.1
31.5
30.8
SHC
13.9
15.4
16.7
14.9
14.5
14.0
15.5
17.8
19.7
17.4
16.9
16.4
20.8
23.6
25.8
22.9
22.2
21.5
22.1
25.3
28.1
24.8
24.1
23.2
TPC
1.69
1.65
1.61
1.61
1.58
1.57
2.23
2.18
2.12
2.12
2.09
2.07
2.95
2.88
2.81
2.80
2.77
2.76
3.25
3.17
3.10
3.09
3.04
3.03
TC
19.4
18.0
16.8
16.6
15.8
15.5
25.8
24.0
22.4
22.2
21.1
20.7
32.3
30.0
27.9
27.7
26.3
25.7
36.8
34.2
31.9
31.6
30.1
29.5
SHC
13.3
14.8
16.0
14.3
13.8
13.4
14.9
17.0
18.9
16.6
16.2
15.6
19.9
22.5
24.6
21.9
21.2
20.4
21.2
24.3
26.9
23.7
23.0
22.3
TPC
1.84
1.79
1.74
1.74
1.70
1.69
2.43
2.36
2.30
2.29
2.25
2.24
3.21
3.12
3.04
3.03
2.99
2.98
3.54
3.44
3.35
3.34
3.28
3.26
TC
18.5
17.1
15.9
15.8
15.0
14.6
24.6
22.9
21.3
21.1
20.1
19.7
30.8
28.6
26.6
26.3
24.9
24.4
35.1
32.6
30.3
30.0
28.5
27.9
SHC
12.7
14.0
15.2
13.6
13.1
12.6
14.2
16.3
18.0
15.8
15.4
14.9
19.0
21.5
23.5
20.7
20.1
19.4
20.2
23.1
25.6
22.5
21.8
21.0
TPC
1.99
1.93
1.88
1.87
1.84
1.83
2.63
2.55
2.47
2.47
2.41
2.39
3.48
3.37
3.27
3.26
3.21
3.19
3.83
3.71
3.61
3.59
3.52
3.50
TC
17.6
16.3
15.1
15.0
14.2
13.9
23.4
21.7
20.1
19.9
18.9
18.5
29.3
27.1
25.1
24.9
23.5
22.9
33.4
30.9
28.7
28.4
26.9
26.4
SHC
12.1
13.4
14.4
12.9
12.4
12.0
13.5
15.4
17.0
14.9
14.5
14.0
18.1
20.3
22.2
19.6
18.9
18.2
19.3
21.9
24.2
21.3
20.6
19.9
TPC
2.15
2.07
2.01
2.00
1.96
1.94
2.84
2.73
2.65
2.64
2.58
2.56
3.75
3.61
3.50
3.49
3.43
3.41
4.13
3.98
3.86
3.85
3.76
3.73
IWB
(˚F)
DB 75°F (50%RH)
DB 72°F (50%RH)
DB 70°F (50%RH)
DB 75°F (50%RH)
DB 72°F (50%RH)
DB 70°F (50%RH)
DB 75°F (50%RH)
DB 72°F (50%RH)
DB 70°F (50%RH)
DB 75°F (50%RH)
DB 72°F (50%RH)
DB 70°F (50%RH)
75 85 95 105 115
710
0.16
Airflow
(CFM)
B.F
PKH24FL 710
0.16
PKH30FL 990
0.15
PKH36FL 990
0.14
Notes 1. B.F. : Bypass Factor, IWB : Intake air wet-bulb temperature
TC : Total Capacity (x103 Btu/h), SHC : Sensible Heat Capacity (x103 Btu/h)
TPC : Total Power Consumption (kW)
2. SHC is based on 80˚FDB of indoor intake air temperature.
3. Cooling capacity correction factors and Refrigerant piping length (one way) range.
MODEL Refrigerant piping length (one way)
1.0
1.0
1.0
1.0
25ft
0.992
0.981
0.981
0.981
40ft
0.983
0.968
0.968
0.968
55ft
0.978
0.952
0.952
0.952
70ft
0.966
0.940
0.940
0.940
85ft
0.959
0.925
0.925
0.925
100ft
0.950
0.913
0.913
0.913
115ft
0.945
0.900
0.900
0.900
130ft
0.886
0.886
0.886
150ft
0.874
0.874
0.874
164ft
PKH18FL
PKH24FL
PKH30FL
PKH36FL
MODELS : PKH18FL, PKH24FL, PKH30FL, PKH36FL
1. PERFORMANCE DATA
1) COOLING CAPACITY
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6
Models
Models Outdoor intake air WB temperature(˚F)
PKH18FL
75
70
65
75
70
65
75
70
65
75
70
65
CA
12.1
12.4
12.7
16.3
16.6
17.0
21.5
21.9
22.5
24.7
25.3
25.9
PC
1.20
1.16
1.11
1.82
1.76
1.69
2.32
2.24
2.15
2.71
2.62
2.53
CA
14.1
14.4
14.7
18.9
19.4
19.8
25.0
25.5
26.1
28.7
29.4
30.1
PC
1.34
1.29
1.24
2.03
1.96
1.89
2.59
2.50
2.40
3.04
2.93
2.82
CA
16.3
16.7
17.0
21.9
22.4
22.9
28.9
29.6
30.2
33.3
34.1
34.8
PC
1.49
1.44
1.38
2.27
2.19
2.10
2.89
2.78
2.68
3.39
3.26
3.14
CA
18.7
19.1
19.5
25.2
25.7
26.2
33.2
33.9
34.6
38.2
39.0
39.9
PC
1.65
1.59
1.53
2.51
2.42
2.32
3.20
3.08
2.96
3.75
3.61
3.47
CA
21.4
21.8
22.2
28.8
29.3
29.9
38.0
38.6
39.4
43.7
44.5
45.4
PC
1.83
1.76
1.69
2.77
2.67
2.56
3.53
3.40
3.26
4.14
3.98
3.83
CA
23.7
24.1
24.5
32.8
33.3
33.9
43.2
43.7
44.6
49.6
50.4
51.3
PC
1.99
1.91
1.83
3.01
2.90
2.78
3.86
3.72
3.56
4.49
4.28
4.14
CA
5.5
6.5
5.5
6.5
6.1
7.5
6.1
7.5
PC
1.6
1.9
1.6
1.9
1.8
2.2
1.8
2.2
IWB
(˚F)15 25 35 45 55 65
Auxiliary heater
208V
230V
710
710
990
990
Airflow
(CFM)
PKH24FL
PKH30FL
PKH36FL
Notes 1. IDB : Intake air dry-bulb temperature
CA : Capacity (x103Btu/h), PC : Power Consumption (kW)
2. When booster heater is "on", total capacity and total power consumption should be added the figures described in
booster heater column.
•Booster heater ON : When the set temperature is higher than the room temperature by more than 5.4 deg.
•Booster heater OFF : When the set temperature is higher than the room temperature by less than 3.6 deg.
3. Heating capacity correction factors.
Models Refrigerant piping length (one way)
1.00
1.00
1.00
1.00
Less than 100ft
0.995
0.995
0.995
0.995
100~130ft
0.990
0.990
0.990
0.990
130~164ft
PKH18FL
PKH24FL
PKH30FL
PKH36FL
2) HEATING CAPACITY
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7
SHF=0.71 Does not include booster heater (1.9kW)
Total power consumption (kW) Total capacity (x103Btu/h)
30
35
24
18
12
3.0
2.5
2.0
1.5
15 25 35 45 55 65
Total power consumption (kW) Total capacity (x103Btu/h)
Outdoor intake air DB temperature ( F) Outdoor intake air WB temperature ( F)
36
30
24
18
12
3.0
2.5
2.0
1.5
63
67
71
63
67
71
023 3235 45 55 65(67) 75 85 95 105 115
Indoor intake air DB temperature ( F)
Indoor intake air WB temperature ( F)
Indoor intake air WB temperature ( F)
Indoor intake air DB temperature ( F)
65
65
70
70
75
75
2. PERFORMANCE CURVE
NOTES : A point on the curve shows the reference point.
COOLING CAPACITY HEATING CAPACITY
COOLING CAPACITY HEATING CAPACITY
Does not include booster heater (1.9kW)
Total power consumption (kW) Total capacity (x103Btu/h)
30
24
18
12
2.5
2.0
1.5
1.0
15 25 35 45 55 65
Total power consumption (kW) Total capacity (x103Btu/h)
Outdoor intake air DB temperature ( F) Outdoor intake air WB temperature ( F)
Indoor intake air DB temperature ( F)
Indoor intake air DB temperature ( F)
65
65
70
70
75
75
30
24
18
12
2.5
2.0
1.5
1.0
63
67
71
63
67
71
SHF=0.82
023 3235 45 55 65(67) 75 85 95 105 115
Indoor intake air WB temperature ( F)
Indoor intake air WB temperature ( F)
<PKH18FL>
<PKH24FL>
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8
NOTES : A point on the curve shows the reference point.
COOLING CAPACITY HEATING CAPACITY
COOLING CAPACITY HEATING CAPACITY
71
67
63
71
67
63
42
36
30
24
4.0
3.5
3.0
2.5
2.0
SHF=0.75
Total capacity(x10 Btu/h)
3
Total power consumption(kW)
Outdoor intake air DB temperature(°F)
0 23 32 35 45 55 65 (67) 75 85 95 105 115
indoor intake air WB temperature(°F)
indoor intake air WB temperature(°F)
48
42
36
30
24
18
4.0
3.5
3.0
2.5
2.0
1.515 25 35 45 55 65
Outdoor intake air WB temperature(°F)
indoor intake air DB temperature(°F)
indoor intake air DB temperature(°F)
Does not include booster heater(2.2kW)65
70
75
75
70
65
Total capacity(x10 Btu/h)
3
Total power consumption(kW)
42
36
30
24
4.5
4.0
3.5
3.0
2.5
Total capacity(x10 Btu/h)
3
indoor intake air WB temperature(°F)
SHF=0.71
Total power consumption(kW)
Outdoor intake air DB temperature(°F)
indoor intake air WB temperature(°F)
0 23 32 35 45 55 65 (67) 75 85 95 105 115
71
67
63
71
67
63
54
48
32
36
30
24
4.5
4.0
3.5
3.0
2.5
2.015 25 35 45 55 65
Outdoor intake air WB temperature(°F)
indoor intake air DB temperature(°F)
indoor intake air DB temperature(°F)
Does not include booster heater(2.2kW)
65
70
75
75
70
65
Total capacity(x10 Btu/h)
3
Total power consumption(kW)
<PKH30FL>
<PKH36FL>
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9
3. CONDENSING PRESSURE AND SUCTION PRESSURE
Data is based on the condition under indoor humidity 50%.
Air flow should be set at HI.
A point on the curve shows the reference point.
<PKH18FL>
Data is based on the condition under outdoor humidity 75%.
A point on the curve shows the reference point.
350
340
330
320
310
300
290
280
270
260
250
240
230
220
210
200
190
180
170
160
150
(psi.G)
Condensing pressure
30 40 50 60 70 80 90 100 110
Outdoor ambient temperature DB( F)
Indoor DB
temperature( F)
86
80
75
70 100
90
80
70
60
50
40
30
20
(psi.G)
Suction pressure
30 40 50 60 70 80 90 100 110
Outdoor ambient temperature DB( F)
86
80
75
70
Indoor DB temperature( F)
350
340
330
320
310
300
290
280
270
260
250
240
230
220
210
200
190
180
170
160
150
(psi.G)
Condensing pressure
30 3520 25 45 55 6540 50 60 70
Outdoor ambient temperature
DB( F)
75
70
65
Indoor DB temperature( F)
80
70
60
50
40
30
20
10
(psi.G)
Suction pressure
30 3520 25 45 55 6540 50 60 70
Outdoor ambient temperature
DB( F)
75
70
65
Indoor DB temperature( F)
COOLING MODE
HEATING MODE
OC276-A-1.qxp 03.11.25 9:04 AM Page 9

10
Data is based on the condition under indoor humidity 50%.
Air flow should be set at HI.
A point on the curve shows the reference point.
Data is based on the condition under outdoor humidity 75%.
A point on the curve shows the reference point.
360
350
340
330
320
310
300
290
280
270
260
250
240
230
220
210
200
190
180
170
160
(psi.G)
Condensing pressure
30 40 50 60 70 80 90 100 110
Outdoor ambient temperature DB( F)
Indoor DB
temperature( F)
86
80
75
70
100
90
80
70
60
50
40
30
20
(psi.G)
Suction pressure
30 40 50 60 70 80 90 100 110
Outdoor ambient temperature DB( F)
86
80
75
70
Indoor DB temperature( F)
350
340
330
320
310
300
290
280
270
260
250
240
230
220
210
200
190
180
170
160
150
(psi.G)
Condensing pressure
30 3520 25 45 55 6540 50 60 70
Outdoor ambient temperature
DB( F)
75
70
65
Indoor DB temperature( F)
80
70
60
50
40
30
20
10
(psi.G)
Suction pressure
30 3520 25 45 55 6540 50 60 70
Outdoor ambient temperature
DB( F)
75
70
65
Indoor DB temperature( F)
<PKH24FL>
COOLING MODE
HEATING MODE
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11
Data is based on the condition under indoor humidity 50%.
Air flow should be set at HI.
A point on the curve shows the reference point.
Data is based on the condition under outdoor humidity 75%.
A point on the curve shows the reference point.
350
340
330
320
310
300
290
280
270
260
250
240
230
220
210
200
190
180
170
160
150
(psi.G)
Condensing pressure
30 40 50 60 70 80 90 100 110
Outdoor ambient temperature DB( F)
86
80
75
70
110
100
90
80
70
60
50
40
30
(psi.G)
Suction pressure
30 40 50 60 70 80 90 100 110
Outdoor ambient temperature DB( F)
86
80
75
70
Indoor DB temperature( F)
Indoor DB temperature( F)
340
330
320
310
300
290
280
270
260
250
240
230
220
210
200
190
180
170
160
150
140
(psi.G)
Condensing pressure
30 3520 25 45 55 6540 50 60 70
Outdoor ambient temperature
DB( F)
75
70
65
Indoor DB temperature( F)
80
70
60
50
40
30
20
10
(psi.G)
Suction pressure
30 3520 25 45 55 6540 50 60 70
Outdoor ambient temperature
DB( F)
75
70
65
Indoor DB temperature( F)
<PKH30FL>
COOLING MODE
HEATING MODE
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12
Data is based on the condition under indoor humidity 50%.
Air flow should be set at HI.
A point on the curve shows the reference point.
Data is based on the condition under outdoor humidity 75%.
A point on the curve shows the reference point.
350
340
330
320
310
300
290
280
270
260
250
240
230
220
210
200
190
180
170
160
150
(psi.G)
Condensing pressure
30 40 50 60 70 80 90 100 110
Outdoor ambient temperature DB( F)
86
80
75
70 90
80
70
60
50
40
30
20
(psi.G)
Suction pressure
30 40 50 60 70 80 90 100 110
Outdoor ambient temperature DB( F)
86
80
75
70
Indoor DB temperature( F)
Indoor DB temperature( F)
390
380
370
360
350
340
330
320
310
300
290
280
270
260
250
240
230
220
210
200
190
(psi.G)
Condensing pressure
30 3520 25 45 55 6540 50 60 70
Outdoor ambient temperature
DB( F)
75
70
65
Indoor DB temperature( F)
80
70
60
50
40
30
20
10
(psi.G)
Suction pressure
30 3520 25 45 55 6540 50 60 70
Outdoor ambient temperature
DB( F)
75
70
65
Indoor DB temperature( F)
<PKH36FL>
COOLING MODE
HEATING MODE
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13
4. STANDARD OPERATION DATA
Models
Item
Electrical circuitRefrigerant circuitIndoor sideOutdoor side
Voltage
Frequency
Total input
Indoor fan current
Booster heater current
Outdoor fan current
Comp. current
Condensing pressure
Suction pressure
Discharge temperature
Condensing temperature
Suction temperature
Comp.shell bottom temperature
Ref. pipe length
Refrigerant charge
Fan speed
Airflow (High)
Fan speed upper/lower
Airflow
Unit
V
Hz
kW
A
A
A
A
psi.G
psi.G
˚F
˚F
˚F
˚F
ft
˚F
˚F
˚F
˚F
r.p.m.
CFM
˚F
˚F
r.p.m.
CFM
Btu/h
208/230
1.79
0.5
0.75
7.4/6.9
255
81
182
118
66
171
80
67
61
59
95
75
18,000
0.82
60
Cooling
208/230
1.56
0.5
7.6/8.4
0.75
6.1/5.9
202
61
126
102
34
111
70
60
96
68
47
43
18,600
Heating
PKH18FL
208/230
2.36
0.5
0.65+0.65
9.3/8.7
240
75
158
115
46
141
80
67
58
56
95
75
24,000
0.71
60
Cooling
208/230
2.37
0.5
7.6/8.4
0.65+0.65
9.5/8.7
243
63
149
115
35
126
70
60
105
70
47
43
25,000
Heating
PKH24FL
208/230
3.12
0.6
0.75+0.75
12.6/11.8
245
80
158
115
49
138
80
67
59
58
95
75
30,000
0.75
60
Cooling
208/230
3.02
0.6
8.7/9.6
0.75+0.75
12.2/11.4
236
60
159
113
32
130
70
60
103
70
47
43
33,000
Heating
PKH30FL
208/230
3.44
0.6
0.75+0.75
14.3/13.2
243
74
160
115
45
142
80
67
58
56
95
75
34,200
0.71
60
25
5 lbs 8 oz
1,310
710
1,310
710
1,400
990
1,400
990
790
1,590
750/750
3,170
760/760
3,350
760/760
3,350
25
9 lbs 15 oz
25
10 lbs 2 oz
25
10 lbs 9 oz
Cooling
208/230
3.54
0.6
8.7/9.6
0.75+0.75
14.7/13.7
263
60
170
120
33
148
70
60
109
71
47
43
38,000
Heating
PKH36FL
Intake
air temperature
Discharge
air temperature
Intake
air temperature
Capacity
SHF
DB
WB
DB
WB
DB
WB
OC276-A-1.qxp 03.11.25 9:04 AM Page 13

14
Condition
Standard temperature
Maximum temperature
Minimum temperature
Maximum humidity
Standard temperature
Maximum temperature
Minimum temperature
80
95
67
80
70
80
70
67
71
57
75
60
67
60
95
115
*0
80
47
75
17
75
—
—
75
43
65
15
Function
Cooling
Heating
Model Airflow
(CFM)Air speed (ft/sec)Coverage
range(ft)
710
710
990
990
16.1
16.1
17.7
17.7
41
41
50
50
Air intake temperature
Indoor
DB(˚F)WB(˚F)
Outdoor
DB(˚F)WB(˚F)
Model Outdoor unit
precharged
(up to 100ft)25ft
0
0
0
0
40ft
0
0
0
0
55ft
0
0
0
0
70ft
0
0
0
0
85ft
0
0
0
0
100ft
0
0
0
0
115ft
2
2
5
5
130ft
4
4
10
10
150ft
7
16
16
164ft
9
20
20
Refrigerant piping length (one way)
5 lbs 8 oz
9 lbs 15 oz
10 lbs 2 oz
10 lbs 9 oz
PKH18FL
PKH18FL
PKH24FL
PKH30FL
PKH36FL
PKH24FL
PKH30FL
PKH36FL
* With wind baffle D.B. 23°F if no wind baffle.
5. OPERATING RANGE
1) POWER SUPPLY
6. OUTLET AIR SPEED AND COVERAGE RANGE
7. ADDITIONAL REFRIGERANT CHARGE (R22(oz))
1 Phase 60Hz 208/230V
Guaranteed voltage range
2) OPERATION
Min. Max.
198V 208V 230V 253V
The air coverage range is the value up to the position
where the air speed is 0.8ft/sec. when air is blown out
horizontally from the unit at the High notch position.
The coverage range should be used only as a general
guideline since it varies according to the size of the
room and furniture installed inside the room.
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15
6. NOISE CRITERION CURVES
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Hi
NOTCH
Lo 49
SPL(dB)
44
LINE
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Hi
NOTCH
Lo 48
SPL(dB)
41
LINE
Wall
Unit
3.3ft
3.3ft
Ambient temperature 80˚F
Test conditions are based on JIS Z8731
PKH18FL
PKH24FL
PKH30FL
PKH36FL
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16
5OUTLINES AND DIMENSIONS
9-1/4 1-25/32
9-1/4 1-25/32
9-1/4 9-1/4
1-25/32
1/2
13-3/8
7-3/4
1-21/32
2-9/32
Top
Front Right side
Left side 55-1/8
42-15/16 Air intake 9-1/4
C
Knock out hole for right piping Refrigerant pipe. Drain pipe
Knock out hole for left piping
Drain hose for left-hand side piping Drain hose
Lower side
Auto vane
(Gas pipe)
Drain hose O.D.1-1/16(or 7/8)
Bolt
Gas pipe
19/32
Terminal block for power supply
Terminal block for control
(Liquid pipe)
Liquid pipe 3/8F Gas pipe 5/8F
Liquid pipe
A
1-3/16
1-15/32
1-17/32
3-27/32 2-9/16
2-29/32
5/32 3-15/16
1-17/32
1-3/16
1-15/32
2-29/32
5/32
1-5/32
11-1/32
1-3/16
7-1/4
1-3/16
3-5/32
1-3/18
2-3/8
13/32
1-17/32
1-15/32 2-9/16
3-15/16
A
B
C
Knock out hole for piping
31/32
43-11/16 7-7/32
9-7/16
B
44-3/32
21-23/32
4-23/32
2-5/32 4-7/32
4-3/8
Air outlet
21-23/32 Air outlet
Change vane (manual)
Under panel Removable at left-hand side piping Knock out hole for under-piping
Refrigerant pipe. Drain pipe
Rear piping opening
Range for left rear piping opening
12-{1/4 Hole for tapping screw
66-{1/4 hole for tapping screw
Wall fixture
Unit center
32-{15/32 hole for bolt
23/32
3-19/32
35-7/16
38-31/32 17-29/32 11-7/32
9-21/32
3/4
9-7/16 11-1/32 12-3/8
24
Drainage range on left-hand side Drainage range
on right-hand side
10x3-19/32=(35-13/16)
7-3/32
2-15/32
8-27/32 3-17/32
23/32
Unit : inch
Indoor Unit
PKH18FL
PKH24FL
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17
66-5/32
9-1/4
53-15/16 Air Intake
Front Knock out hole Right side
9-1/4
7-3/4
C
for right piping
B
A
A
B
C
4-1/32
Liquid pipe 1/2F
Gas pipe
Sleeve >< 1
>< 1 Sleeves are available
on the market.
Through hole
3-1/2 3-1/2~ 4
3/4F
Bolt
Drain hose O.D.1-1/16(or 7/8)
19/32 or less
4-3/8
2-5/32(Gas pipe)
Terminal block for control
Terminal block for power supply
31/32
Drain hose for left-hand side piping 7-7/32
9-7/16
43-11/16 (Drain hose)
27-5/16 Air outlet 27-5/16 Air outlet
louvers(manual)
Under panel (Removable at
Auto vanes
Knock out hole for under-piping Refrigerant pipe .Drain pipe
left-hand piping)
55-1/8
Drain hose
1-21/32
2-9/32
4-23/32(Liquid pipe)
Top
Front
Left side
Air intake
5-/15/16 or less
1-3/16
or more
10 or more
Air outlet
13-3/8
Knock out hole for left piping
1-3/161-3/16
1-15/32
1-15/32
2-9/16
1-15/32
1-17/32
1-17/32
3-15/16
3-15/16
5/32
5/32
2-29/32
2-29/32
2-9/16
3-27/32
1-17/32
Lower side
2
1
Knock out hole for wiring
2 or more 10 or more
9-1/4
1-25/32 9-1/4
1-25/32 9-1/4
1-25/32 9-1/4
1/2
1-25/32
2-15/32
1 2
11-5/8
23/32
Wall fixture
Unit out line
84-{1/4 hole for tapping screw
Drainage range on Left hand side
23/32
35-7/16
23-7/16
50
13x3-19/32=(7-3/16)
11-7/32
9-21/32
Drainage range on right-hand side
3-19/32
3/4
Range for left rear piping hole
Range for left rear piping hole
41- 15/32 hole for bolt
9-7/16
7-3/32
8-27/32
11-1/32
12-3/8
1-3/16
7-1/4 13/32
1-3/16
1-3/16
3-5/32
1-5/32
11-1/32
2-3/8
29-17/32
7-17/32
12- 1/4 hole for tapping screw
Rear piping hole
Unit center
Unit : inch
PKH30FL
PKH36FL
OC276-A-1.qxp 03.11.25 9:04 AM Page 17

18
Remote controller
Pipe temperature
thermistor / Liquid
(RT2) Distributor
Restrictor
valve
Capillary tube
PKH18FL : ({0.126x{0.071x19.7)
PKH24FL : ({0.157x{0.079x19.7) w
Refrigerant pipe
(option)
{3/8"
(with heat insulator)
Refrigerant pipe
(option)
{5/8"
(with heat insulator)
Strainer
Flared connection
Flared connection
wAn error in this diagram has been
modified. The size of capillary tube
{0.157x{0.07x19.7, was wrong.
PKH30FL : ({0.157x{0.079x23.6)
PKH36FL : ({0.157x{0.079x15.7)
Pipe temperature
thermistor / Liquid
(RT2) Distributor
Restrictor
valve
Capillary tube
Refrigerant pipe
(option)
{1/2"
(with heat insulator)
Refrigerant pipe
(option)
{3/4"
(with heat insulator)
Strainer Flared connection
Flared connection
PKH18FL
PKH24FL
PKH30FL
PKH36FL
6REFRIGERANT SYSTEM DIAGRAM
COOLING
HEATING
Refrigerant flow
2-9/32
6-3/8
3/4
ON/OFF TEMP
MODEL
SELECT
NOT AVAILABLE
SWING
CHECK
FAN
TEST
RUN
˚F
˚C
AMPMSTOP
START
AMPM
COOL
DRY
AUTO
FAN
HEAT
Unit : inch
WIRELESS REMOTE CONTROLLER
OC276-A-1.qxp 03.11.25 9:04 AM Page 18

19
WIRING DIAGRAM
7
MODELS PKH18FL, PKH24FL, PKH30FL, PKH36FL WIRING DIAGRAM
GR
L1
L2 POWER SUPPLY
~(1PHASE)
AC208/230V 60Hz
GROUND
3
LED(HOT ADJUST)
LED(RUN INDICATOR)
LED1
LED2
WIRELESS REMOTE CONTROLLER
W.R
FS1,2 THERMAL FUSE
88H HEATER CONTACTOR
HEATER THERMAL SWITCH
HEATER
26H
H
HEATER
12 312 312 3
36FL
OFF
ON
30FL
OFF
ON
MODELS 24FL
12 3
ON
OFF OFF
ON
SW7
18FL
ON
OFF
LED(DC5V POWER)
X4 RELAY(FAN MOTOR)
LED1
LED2 LED(DC12V POWER)
SW9 SWITCH(MODEL SELECTOR)
F1,F2 VARISTORZNR
SYMBOL NAME
I.B INDOOR POWER BOARD
INDOOR CONTROLLER BOARD
CN2L
SW1
SW2
SW6
FC
CONNECTOR(LOSSNAY)
SWITCH(FUNCTION SELECTOR)
SWITCH(ADDRESS SELECTOR)
SWITCH(MODEL SELECTOR)
FAN PHASE CONTROL
P.B
CN51 CONNECTOR(CENTRALLY CONTROL)
SW3 SWITCH(EMERGENCY OPERATION)
SW5 SWITCH(MODEL SELECTOR)
SW7 SWITCH(TWIN/TRIPLE SELECTOR)
SW8 SWITCH(OPTION)
BZ
TB2~TB6 TERMINAL BLOCK
ROOM TEMPERATURE THERMISTOR
RT1
RT2 PIPE TEMPERATURE THERMISTOR/LIQUID
W.B WIRELESS REMOTE CONTROLLER BOARD
BUZZER
SWITCH(HEATER ON/OFF)
SW1 SWITCH(COOLING ON/OFF)SW2
RECEIVING UNIT
RU
NAMESYMBOL VANE MOTOR
MV
FAN MOTOR
MF CAPACITOR(FAN MOTOR)
C
12 OFF
ON
1542
231
2341
165432 1432 165432 10987654321
ON
OFF ON OFF ON OFF
RG79J693H02
321
9
ORN
YLW 1
2
TB4
3
BRN
TB3
OUTDOOR UNIT
1
2
TRANSMISSION WIRES DC12V
3
9REMOTE
W.R
CONTROLLER
CNB
W.B
LED1
LED2
BZ
RU
SW1 SW2
ON
123456
OFF OFF123456
ON
NOTES:
1.Since the indoor fan motor(MF)is connected with 230V power,if 208V power is used,change the dip switch(SW8)on
the indoor controller board as shown in fig:*1.
fig:*1
Indoor fan motor(MF)for 208V.
2.Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing.
3.Indoor and outdoor connecting wires are made with polarities, make wiring matching terminal numbers.
4.Symbols used in wiring diagram above are, :Connector, :Terminal block.
5.Emergency operation
If remote controller or microcomputer fails but there is no other trouble 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 in the outdoor unit.Trouble with the outdoor unit prevents emergency operation.
(2) Make sure that there is no trouble with the indoor fan.
Emergency operation will be continuous run with the 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 1 on and 2 off for cooling and 1 • 2 on for heating.
(2) Turn on outdoor unit side circuit breaker,then indoor unit side circuit breaker.
(3) During emergency operation indoor fan runs at high speed but auto-vane does not work.
(4) Thermostat will not function.Cold air blows out for defrosting during heating thus do not operate defrosting for a long time.
(5) Emergency cooling should be limited to 10 hours maximum
(the indoor unit heat exchanger may freeze).
(6) After every emergency operation,set all dip switches(SW3<I.B>) to OFF.
(7) Movement of the vanes does not work in emergency operation,therefore you have to slowly set them manually to the
appropriate position.
SW8 SW8
HFS1FS2 88H
TB2
26H
BWN YLW
8
88H
5
6GRY
7GRY
RED
BLUBLU 64
35
RED
2
1
12
HEATER
CN24
(YLW)
6
[LEGEND]
2
1
32
1
3
2
1
2
1
312 12 12
4
3
2
1
213131
SW3 SW9
SW7
SW6
SW1
SW8
SW5
RT2 RT1
F2 F1
SW2
CN51
CENTRALLY
CONTROL
(WHT)
CN40
REMOCON
POWER
LED1 LED2
CN2L
LOSSNAY
ZNR
OUT
DOOR
CN30
WHT BLK
CN2D
(WHT)
GRN/YLW
RED
BLU
RED
BLU
P.B
TRANS
(DC13.1V)
CN2S (WHT)
CNSK(RED)
I.B
MF
C
135
FC
MV
X4
X4
WHT
RED
BLK
WHT BLK
FAN
(WHT)
INTAKE
CN20
(RED)
POWER
CNDK
(WHT)
POWER
CND
(RED)
WIRELESS
CN90
(WHT)
REMOCON
CN22
(BLU)
PIPE
CN21
(WHT)
VANE
CN6V
(WHT)
DRAIN
CN31
(WHT)
243˚F ,10A(18,24FL)/16A(30,36FL)
FUSE(6A/250V)
(32˚F /15kΩ, 77˚F /5.4kΩDETECT)
(32˚F /15kΩ, 77˚F /5.4kΩDETECT)
(AC208/230V)
(BLU)
The drawing has been revised as some errors in
WIRING DIAGRAM have been modified.
The former drawing number is RG79J693H01.
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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 centralised control and remote control can be operated.
w2 The modes which indicate the sources of trouble are listed below.
● E0-Signal transmitting/receiving error
● P1-Room temperature thermistor malfunction
● P2-Indoor coil thermistor malfunction
● P4-Drain sensor malfunction
● P5-Drain overflow
● P6-Coil frost/overheat protection
● P7-System error
● P8-Outdoor unit trouble
w3 The CHECK switch 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 dip switch setting.
w7 In FAN mode, fan speed and vane operation depend on the remote controller setting. (Compressor is OFF.)
OC276-A-1.qxp 03.11.25 9:04 AM Page 20