Mitsubishi PK18FL3 User manual

OC275-1
CONTENTS
1. TECHNICAL CHANGE ··················································································OC275- 2
2. FEATURES·····································································································OC275- 3
3. PART NAME AND FUNCTIONS····································································OC275- 4
4. SPECIFICATIONS··························································································OC275- 5
5. DATA ··············································································································OC275- 6
6. OUTLINES AND DIMENSIONS·····································································OC275-13
7. REFRIGERANT SYSTEM DIAGRAM····························································OC275-15
8. WIRING DIAGRAM························································································OC275-16
9. OPERATION FLOW-CHART·········································································OC275-17
10. MICROPROCESSOR CONTROL··································································OC275-20
11. TROUBLESHOOTING····················································································OC275-32
12. DISASSEMBLY PROCEDURE ······································································OC275-35
13. PARTS LIST···································································································OC275-38
PK18FL3
PK24FL3
PK30FL3
PK36FL3
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OC275-2
1TECHNICAL CHANGE
PK18FL1➔PK18FL3
PK24FL1➔PK24FL3
PK30FL1➔PK30FL3
PK36FL1➔PK36FL3
●REMOTE CONTROLLER has changed.
●INDOOR CONTROLLER BOARD has changed accordance with remote controller change.
1) From TRANSFORMER to POWER BOARD.
2) SW1 changed from function selector to mode selector.
3) SW2 changed from unit selector to address selector.
4) The number of switches of SW3 changed from 3 to 2 pieces.
5) Function of jumper wire for JR is blotted out and SW5 for model selector, SW6 for address selector, SW7 for model
selector, SW8 for option and SW9 for model selector are added.
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OC275-3
FEATURES
2
1. COMPACT DESIGN
The PK 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.
PK18/24/30/36FL3 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
Indoor unit Wireless Remote controller
Models Cooling capacity SEER
PK18FL3 18,500 Btu/h 11.3
PK24FL3 24,000 Btu/h 10.6
PK30FL3 30,000 Btu/h 10.7
PK36FL3 34,200 Btu/h 10.2
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OC275-4
3 PART NAME AND FUNCTIONS
●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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OC275-5
SPECIFICATIONS4
Capacity
Power consumption
EER
SEER
INDOOR UNIT MODEL
External finish
Power supply
Max. fuse size (time delay)
Min ampacity
Fan motor
Airflow Hi-Lo
Moisture removal
Sound level Hi-Lo
Unit drain pipe I.D.
Dimensions
Weight
OUTDOOR UNIT MODEL
External finish
Power supply
Max. fuse size (time delay)
Min. ampacity
Fan motor
Compressor
Crankcase heater
Refrigerant control
Sound level
Dimensions
Weight
REMOTE CONTROLLER
Control voltage (by built-in transformer)
REFRIGERANT PIPING
Pipe size
Connection method
Between the indoor
& outdoor units
Refrigerant charge
Refrigerant oil
❈1
❈1
❈1
Dry
Wet
W
D
H
Model
W
D
H
Liquid
Gas
Indoors
Outdoors
Height
Piping length
Btu/h
kW
V, Phase, Hz
A
A
F.L.A.
CFM
CFM
Pints/h
dB
in.
in.
in.
in.
Ib.
V, Phase, Hz
A
A
F.L.A
R.L.A
L.R.A
A(W)
dB
in.
in.
in.
Ib.
in.
in.
ft
fr
–
cc <Model>
Model
130
130
5 lbs 8 oz
520 <MS-56>
PK18FL3
18,500
1.75
10.6
11.3
PK18FL3
15
1
0.7
710-530
640-480
5.3
48-41
1-1/16
53
PU18EK1
20
16
0.75
RH247NAB
12.0
37
0.11/0.12 (23/28)
53
33-1/2
154
55-1/8
34-1/4
11-5/8
PK24FL3
24,000
2.34
10.3
10.6
PK24FL3
15
1
0.7
710-530
640-480
7.2
48-41
1-1/16
53
PU24EK1
20
16
0.65+0.65
NH33NBD
11.5
54
0.16/0.17 (33/39)
55
207
Munsell 3.4Y7.7/0.8
115, 1, 60
9-1/4
13-3/8
Munsell 5Y7/1
208/230, 1, 60
Capillary tube
With indoor unit
Indoor unit - outdoor unit : DC12V
Not supplied (optional parts)
Flared
Flared
PK30FL3
30,000
3.06
9.8
10.7
PK30FL3
15
2
1.0
990-780
890-700
9.6
49-44
1-1/16
62
PU30EK1
30
20
0.65+0.65
NH41NAD
14.0
73
0.16/0.17 (33/39)
55
49-9/16
208
164
164
10 lbs 2 oz
1/2
3/4
PK36FL3
34,200
3.47
9.9
10.2
PK36FL3
15
2
1.0
990-780
890-700
10.5
49-44
1-1/16
62
PU36EK1
30
22
0.75+0.75
NH47NAD
17.5
87
0.16/0.17 (33/39)
55
38-3/16
13-9/16
220
66-5/32
Item
NOTES : ❈1.Rating conditions —indoor : 80˚FDB, 67˚FWB outdoor : 95˚FDB,75˚FWB.
Operating range
Indoor intake air temperature
DB 95˚F, WB 71˚F
DB 67˚F, WB 57˚F
Outdoor intake air temperature
DB 115˚F
DB 0˚F *
Cooling Maximum
Minimum
3/8
5/8
9 lbs 15 oz
1200 <MS32N-1> 10 lbs 9 oz
1300 <MS32N-1>
*In case of the wind baffle is installed.
(In case of the wind baffle is not installed, the minimum temperature will be DB 23˚F.)
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OC275-6
5 DATA
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. Cooling capacity correction factors and Refrigerant piping length (one way) range.
MODEL Refrigerant piping length (one way)
PK18FL3
PK24FL3
PK30FL3
PK36FL3
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
TC
21.5
20.1
18.8
18.6
17.8
17.4
27.9
26.1
24.3
24.1
23.0
22.6
34.9
32.6
30.4
30.2
28.8
28.3
39.8
37.1
34.7
34.4
32.8
32.2
IWB
(˚F)
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
Indoor air
Airflow
(CFM)
B.F
Models
PK18FL3
PK24FL3
PK30FL3
PK36FL3
710
0.14
710
0.14
990
0.15
990
0.15
DB 80˚F
DB75˚F(50%RH)
DB72˚F(50%RH)
DB70˚F(50%RH)
DB 80˚F
DB75˚F(50%RH)
DB72˚F(50%RH)
DB70˚F(50%RH)
DB 80˚F
DB75˚F(50%RH)
DB72˚F(50%RH)
DB70˚F(50%RH)
DB 80˚F
DB75˚F(50%RH)
DB72˚F(50%RH)
DB70˚F(50%RH)
75
SHC
14.8
16.5
17.9
16.0
15.6
15.0
16.4
18.8
20.7
18.3
17.8
17.3
21.5
24.5
26.9
23.8
23.2
22.5
23.0
26.3
29.3
25.8
25.1
24.3
TPC
1.52
1.49
1.46
1.45
1.43
1.43
2.04
1.99
1.95
1.94
1.92
1.91
2.66
2.61
2.55
2.54
2.51
2.49
3.02
2.96
2.89
2.88
2.84
2.83
TC
20.8
19.3
18.0
17.9
17.1
16.7
26.9
25.1
23.4
23.2
22.1
21.7
33.7
31.4
29.2
29.0
27.7
27.1
38.4
35.7
33.3
33.1
31.5
30.9
85
SHC
14.3
15.8
17.2
15.4
15.0
14.4
15.8
18.1
20.0
17.6
17.1
16.6
20.8
23.6
25.8
22.9
22.3
21.5
22.1
25.3
28.1
24.8
24.1
23.3
TPC
1.65
1.61
1.57
1.57
1.55
1.54
2.21
2.16
2.11
2.10
2.07
2.05
2.89
2.82
2.75
2.75
2.70
2.69
3.28
3.20
3.12
3.11
3.07
3.05
TC
19.9
18.5
17.2
17.1
16.3
16.0
25.8
24.0
22.4
22.2
21.1
20.7
32.3
30.0
27.9
27.7
26.4
25.9
36.8
34.2
31.9
31.6
30.1
29.5
Outdoor intake air DB temperature (˚F)
95
SHC
13.7
15.2
16.4
14.7
14.3
13.8
15.1
17.3
19.1
16.8
16.4
15.8
19.9
22.5
24.6
21.9
21.3
20.6
21.2
24.3
26.9
23.7
23.0
22.3
TPC
1.80
1.75
1.70
1.70
1.67
1.66
2.40
2.34
2.28
2.27
2.23
2.22
3.14
3.06
2.98
2.97
2.92
2.90
3.57
3.47
3.38
3.37
3.31
3.29
TC
19.0
17.6
16.4
16.2
15.5
15.1
24.6
22.9
21.3
21.1
20.0
19.6
30.8
28.6
26.6
26.3
25.1
24.6
35.1
32.6
30.3
30.0
28.6
28.0
105
SHC
13.0
14.4
15.6
13.9
13.6
13.1
14.4
16.5
18.2
16.0
15.5
15.0
19.0
21.5
23.5
20.7
20.2
19.5
20.2
23.1
25.6
22.5
21.9
21.1
TPC
1.95
1.89
1.83
1.83
1.79
1.78
2.61
2.53
2.45
2.44
2.40
2.38
3.41
3.30
3.21
3.20
3.14
3.11
3.87
3.74
3.64
3.63
3.56
3.53
TC
18.1
16.7
15.5
15.4
14.6
14.3
23.4
21.7
20.1
19.9
18.9
18.5
29.3
27.1
25.1
24.9
23.7
23.2
33.4
30.9
28.7
28.4
27.0
26.4
115
SHC
12.4
13.7
14.8
13.2
12.8
12.4
13.7
15.6
17.2
15.1
14.7
14.1
18.1
20.3
22.2
19.6
19.1
18.4
19.3
21.9
24.2
21.3
20.7
19.9
TPC
2.10
2.03
1.96
1.96
1.92
1.90
2.81
2.71
2.62
2.62
2.56
2.54
3.68
3.54
3.43
3.42
3.35
3.32
4.17
4.02
3.89
3.88
3.80
3.77
1. PERFORMANCE DATA
1) COOLING CAPACITY
2) COOLING CAPACITY CORRECTIONS
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OC275-7
42
71
67
63
71
67
63
30
36
24
4.5
4.0
3.5
3.0
2.5
023 3235 45 55 65(67) 75 85 95 105 115
Total capacity (✕103 Btu/h)Total power consumption (kW)
Outdoor intake air DB temperature (°F)
indoor intake air WB temperature (°F)
indoor intake air WB temperature (°F)
SHF=0.71
2. PERFORMANCE CURVE
NOTE : A point on the curve shows the reference point.
PK18FL3 COOLING CAPACITY PK24FL3 COOLING CAPACITY
PK30FL3 COOLING CAPACITY PK36FL3 COOLING CAPACITY
30
71
67
63
71
67
63
18
24
12
3.0
2.5
2.0
1.5
1.0
023 3235 45 55 65(67) 75 85 95 105 115
Total capacity (✕103 Btu/h)Total power consumption (kW)
Outdoor intake air DB temperature (°F)
indoor intake air WB temperature (°F)
indoor intake air WB temperature (°F)
SHF=0.82
Total capacity (✕103 Btu/h)Total power consumption (kW)
Outdoor intake air DB temperature (°F)
023 3235 45 65 (67) 75 85 95 105 11555
1.5
2.0
2.5
3.0
3.5
18
36
24
30
71
67
63
71
67
63
indoor intake air WB temperature (°F)
indoor intake air WB temperature (°F)
SHF=0.72
023 3235 45 65 (67) 75 85 95 105 11555
2.0
2.5
3.0
3.5
4.0
24
42
30
36
71
67
63
71
67
63
Total capacity (✕103 Btu/h)Total power consumption (kW)
Outdoor intake air DB temperature (°F)
indoor intake air WB temperature (°F)
indoor intake air WB temperature (°F)
SHF=0.75
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OC275-8
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.
PK18FL3
<Cooling mode> PK18FL3
86
80
75
70 86
80
75
70
Outdoor ambient temperature
30 40 50 60 70 80 90 100 110
360
350
340
330
320
310
300
290
280
270
260
250
240
230
220
210
200
190
180
170
160
[psi.G]
100
90
80
70
60
50
40
30
20 30 40 50 60 70 80 90 100 110
Outdoor ambient temperature DB(°F)
DB(°F)
[psi.G]
Indoor DB temperature (°F)
Indoor DB temperature (°F)
Condensing pressure
Suction pressure
PK24FL3
<Cooling mode> PK24FL3
Outdoor ambient temperature Outdoor ambient temperature DB(°F)
DB(°F)
86
80
75
70
86
80
75
70
30 40 50 60 70 80 90 100 110
350
340
330
320
310
300
290
280
270
260
250
240
230
220
210
200
190
180
170
160
150
[psi.G]
100
90
80
70
60
50
40
30
20 30 40 50 60 70 80 90 100 110
[psi.G]
Indoor DB temperature (°F)
Indoor DB temperature (°F)
Condensing pressure
Suction pressure
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OC275-9
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.
Outdoor ambient temperature (°F)
Indoor DB temperature (°F)
[psi. G]
340
330
320
310
300
290
280
270
260
250
240
230
220
210
200
190
180
170
160
150
140
86
80
75
70
PK30FL3
<Cooling mode>
Condensing pressure
30 40 50 60 70 80 90 100 110
DB(°F) Outdoor ambient temperature (°F)
PK30FL3
Suction pressure
DB(°F)
86
80
75
70
100
90
80
70
60
50
40
30 30 40 50 60 70 80 90 100 110
[psi.G]
Indoor DB temperature (°F)
Outdoor ambient temperature (°F)
Indoor DB temperature (°F)
[psi. G]
340
330
320
310
300
290
280
270
260
250
240
230
220
210
200
190
180
170
160
150
140
86
80
75
70
PK36FL3
<Cooling mode>
Condensing pressure
30 40 50 60 70 80 90 100 110
DB(°F) Outdoor ambient temperature (°F)
Indoor DB temperature (°F)
[psi. G]
90
80
70
60
50
40
30
20
86
80
75
70
PK36FL3
Suction pressure
30 40 50 60 70 80 90 100 110
DB(°F)
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OC275-10
3. STANDARD OPERATION DATA
750 750 750 750 760 760
Capacity
SHF
Input
INDOOR UNIT MODEL
Power supply (V, phase, Hz)
Input
Fan current
OUTDOOR UNIT MODEL
Power supply (V, phase, Hz)
Input
Comp. current
Fan current
Condensing pressure
Suction pressure
Discharge temp.
Condensing temp.
Suction temp.
Ref. pipe length
Intake air temperature
Discharge air temperature
Fan speed (High)
Airflow (High)
Intake air temperature
Fan speed upper / lower
Airflow
Unit
Btu / h
—
kW
kW
A
kW
A
A
psi-G
psi-G
˚F
˚F
˚F
ft
˚F
˚F
˚F
˚F
rpm
CFM
˚F
˚F
rpm
CFM
PK18FL3
Cooling
18,500
0.82
1.75
PK18FL3
115, 1, 60
0.09
0.7
PU18EK1
208/230, 1, 60
1.66
12.0
0.75
255
82
171
118
51
25
80
67
61
59
1,300
710
95
75
790
1,590
PK24FL3
Cooling
24,000
0.72
2.34
PK24FL3
115, 1, 60
0.09
0.7
PU24EK1
208/230, 1, 60
2.25
11.5
0.65+0.65
240
74
155
114
44
25
80
67
58
56
1,300
710
95
75
3,170
PK30FL3
Cooling
30,000
0.75
3.06
PK30FL3
115, 1, 60
0.12
1.0
PU30EK1
208/230, 1, 60
2.94
14.0
0.65+0.65
247
77
163
116
46
25
80
67
59
58
1,380
990
95
75
3,170
PK36FL3
Cooling
34,200
0.71
3.47
PK36FL3
115, 1, 60
0.12
1.0
PU36EK1
208/230, 1, 60
3.35
17.5
0.75+0.75
247
73
163
116
43
25
80
67
58
56
1,380
990
95
75
3,350
DB
WB
DB
WB
DB
WB
Item
Model
TotalRefrigerant circuitIndoor sideOutdoor side Electrical circuit
OC275--1.qxp 01/12/14 3:06 PM Page 10

OC275-11
4. OPERATING RANGE
1) POWER SUPPLY
2) OPERATION
5. OUTLET AIR SPEED AND COVERAGE RANGE
●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 fan setting.
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.
6. ADDITIONAL REFRIGERANT CHARGE (R22 (OZ))
Indoor unit
Outdoor unit
Rating
115V 1 phase 60Hz
208/230V 1 phase 60Hz
Allowable voltage
Min. 103V — Max. 127V
Min. 198V — Max. 253V
Function
Cooling
DB (˚F)
80
95
67
80
Condition
Standard temperature
Maximum temperature
Minimum temperature
Maximum humidity
Indoor
Intake air temperature Outdoor
WB (˚F)
67
71
57
75
DB (˚F)
95
115
0
80
WB (˚F)
75
75
—
75
Airflow
Air speed
Coverage range
(CFM)
(ft / sec.)
(ft)
Standard
height
(8.2ft)
PK18FL3
710
16.1
41
PK24FL3
710
16.1
41
PK30FL3
990
17.7
50
PK36FL3
990
17.7
50
Model
PK18FL3
PK24FL3
PK30FL3
PK36FL3
5 lbs 8 oz
9 lbs 15 oz
10 lbs 2 oz
10 lbs 9 oz
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
Outdoor unit
precharged
(up to 100ft)
Refrigerant piping length (over way)
OC275--1.qxp 01/12/14 3:06 PM Page 11

OC275-12
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
PK30FL3
PK36FL3 Hi
NOTCH
Lo 49
SPL(dB)
44
LINE
7. 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
PK18FL3
PK24FL3 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
OC275--1.qxp 01/12/14 3:06 PM Page 12

OC275-13
OUTLINES AND DIMENSIONS
6
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
Bottom
Auto vane
(Gas pipe)
Drain hose
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 4-1/32
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
8-27/32
23/32
3-17/32
2-15/32
ELECTRICELECTRICELECTRICELECTRICELECTRIC
MITSUBISHI
MITSUBISHI MITSUBISHI
MITSUBISHI
MITSUBISHI
Emergency switch
(Cool)
Display section
Receiving section
Power lamp
ON ON
OFF
POWER
Unit : inch
5.1. Indoor Unit
PK18FL3
PK24FL3
OC275--1.qxp 01/12/14 3:06 PM Page 13

OC275-14
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
in the market.
Through hole
3-1/2 3-1/2~ 4
3/4F
Bolt
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
Left side
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
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 7-3/328-27/32 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 screwRear piping hole
Unit center
ELECTRICELECTRICELECTRICELECTRICELECTRIC
MITSUBISHI
MITSUBISHI MITSUBISHI
MITSUBISHI
MITSUBISHI
Emergency switch
(Cool)
Display section
Receiving section
Power lamp
ON ON
OFF
POWER
Unit : inch
PK30FL3
PK36FL3
OC275--1.qxp 01/12/14 3:06 PM Page 14

OC275-15
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
5.2. Remote controller
WIRELESS REMOTE CONTROLLER
7REFRIGERANT SYSTEM DIAGRAM
Indoor unit
Pipe temperature
thermistor / Liquid
(RT2)
Pipe temperature
thermistor / Liquid
(RT2)
Refrigerant pipe
(Option)
{5/8
(with heat insulator)
Refrigerant pipe
(Option)
{3/8
(with heat insulator)
Distributor
Indoor
heat
exchanger
Refrigerant pipe
(Option)
{3/4
(with heat insulator)
Refrigerant pipe
(Option)
{1/2
(with heat insulator)
Indoor unit
Distributor
Indoor
heat
exchanger
Refrigerant flow
COOLING
PK18FL3
PK24FL3 PK30FL3 PK36FL3
OC275--1.qxp 01/12/14 3:06 PM Page 15

OC275-16
8WIRING DIAGRAM
Indoor Unit
PK18/24/30/36FL3
GR
L1
N
TB2 POWER SUPPLY
~(1PHASE)
AC115V 60Hz
GROUND
WIRELESS REMOTE CONTROLLER
W.R
SW7 ON
OFFOFF
ON
123
24FL3MODELS
ON
OFF ON OFF
36FL3
123 123 123
30FL318FL3
ON
OFF
[Check items]
(1)Make sure that no other trouble exist 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).
(7)Movement of the vanes does not work in emergency operation,therefore you have to slowly set them manually to the
appropriate position.
[Emergency operation procedure]
(1)Set the dip switch(SW3<I.B>)on the indoor controller board to 1on and 2off for cooling.
(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.
(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.
1.Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing.
2.Indoor and outdoor connecting wires are made with polarities, make wiring matching terminal numbers.
3.Symbols used in wiring diagram above are, :Connector, :Terminal block.
4.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.
NOTES:
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 TEMP.THERMISTORRT1
RT2 PIPE TEMP.THERMISTOR/LIQUID
W.B REMOTE CONTROLLER BOARD
BUZZER
LED(RUN INDICATOR)
LED1 SWITCH(COOLING ON/OFF)SW2
RECEIVING UNITRU
NAMESYMBOL
VANE MOTORMV FAN MOTORMF CAPACITOR(FAN MOTOR)C
12 OFF
ON
15423
231
2341
165432 1432 165432 10987654321
ON
OFF
ON
OFF ON
OFF
9
SW2SW1
RU
BZ LED2 LED1
W.B
CNB
CONTROLLER
W.R
REMOTE
6
6
[LEGEND]
2
1
32
1
3
2
1
2
1
312 12 12
4
3
2
1
2131
31
2
1
2
1
SW3 SW9
SW7
SW6
SW1
SW8
SW5
RT2 RT1
F2 F1
YLW
ORN
SW2
CN51
CENTRALLY
CONTROL
(WHT)
CN40
REMOCON
POWER
LED1 LED2
CN2L
LOSSNAY
OUTDOOR UNIT
TRANSMISSION WIRES DC12V
TB3
TB4
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)
FUSE(6A/250V)
(32°F/15k'77°F/5.4k'DETECT)
(32°F/15k',77¯°F/5.4k'DETECT)
(AC115V)
(BLU)
OC275--1.qxp 01/12/14 3:06 PM Page 16

OC275-17
OPERATION FLOW-CHART9
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
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
w 1
w 2
w 3
w 4
w 5
PROTECTION DEVICE
SELF HOLD RELEASE
Remote controller
indicator lamp OFF
Trouble STOP
Remote controller
operation display
Operating mode
(COOL)
Operating mode
(DRY)
COOL operation
DRY operation
FAN operation
Trouble
PROTECTION DEVICE
SELF HOLD
Remote controller
trouble display
Indoor side
Outdoor side
Fan STOP
Compressor OFF
Fan STOP
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.
● EO-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 The 3-minute time-delay functions after compressor stops.
w5 In FAN mode, fan speed and vane operation depend on the remote controller setting. (Compressor is OFF.)
OC275--1.qxp 01/12/14 3:06 PM Page 17

OC275-18
COOL operation
Initial
COOLING
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
NO
YES
YES
YES
YES
YES
YES
YES
YES YES
YES
YES
NO
NO
NO
NO
YES
NO
NO NO
NO
NO
NO
NO
NO
NO
w8
w9
Vane initial
setting
Vane
55 deg downward angle
70 deg downward angle
Fan speed
LOW
Downward
discharge
1 hour
Vane setting notch Vane horizontal
airflow
Compressor
thermostat
ON
Allowance
cancel
3-minute
time delay
6-minute
time delay
3-minute
compressor
operation
Coil frost
protection
Cooling area
10-minute
compressor
operation
Allowance cancel
Coil frost
prevention
16-minute
compressor
operation
Indoor pipe
temperature is
34˚F or lower
Compressor ON
1
w10
w11
Coil frost
prevention
Compressor OFF
Indoor coil
temperature is
50˚F or higher
Defrosting
protection detection
temperature 30˚F
or lower
YES
NO
6-minute
time delay 3-minute time delay
Coil frost
prevention release
Allowance
period
6 minute
time delay
Allowance set
1 min.
continue
Coil frost protection
FAN speed
LOW
FAN speed
LOW 5 min.
elapse
Outdoor unit
trouble
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.
w10After 3 minute compressor operation, if the indoor coil thermistor reads 5°F or below for 3 minutes, the compressor will
stop for 6 minutes.
w11Heating area : Indoor coil temperature is more than 9 degrees above the room temperature.
Cooling area : Indoor coil temperature is more than 9 degrees below the room temperature.
FAN area : Indoor coil temperature is within 9 degrees either way of the room temperature.
OC275--1.qxp 01/12/14 3:06 PM Page 18

OC275-19
w8—9 Refer to page OC275-18.
w12 When room temperature is 64°F or below, the compressor cannot operate.
When room temperature rises over 64°F the compressor starts after a 3-minute time delay.
w13 Compressor ON time is decided by room temperature. Refer to page OC275-24.
w14 In dry operation, compressor ON makes the fan speed LOW. Also, when the compressor OFF and the pipe temperature
is 79°F or less, the fan stops, or when the compressor OFF and the pipe temperature is below 43°F the fan speed
changes to LOW mode.
It is not possible to set the fan speed with the remote controller
DRY OPERATION
DRY
operation
Initial dry
operation
Room temperature is
64°F 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
OC275--1.qxp 01/12/14 3:06 PM Page 19

OC275-20
10 MICROPROCESSOR CONTROL
1. OUTLINE OF MICROPROCESSOR CONTROL
●OFF-ON switching.
●COOL • DRY • FAN selector switching.
●HIGH-LOW fan speed switching.
●TIMER mode selector-switching
●Timer setting.
●Self diagnostic troubleshooting.
●TEST RUN switching.
●CHECK mode switching.
●AUTO Vane setting.
INPUT to remote controller OUTPUT to remote controller
●Indication LCD lights.
REMOTE CONTROLLER
● Processes and transmits orders.
ON/OFF TEMP
MODEL
SELECT
NOT AVAILABLE
SWING
CHECK
FAN
TEST
RUN
˚F
˚C
AMPMSTOP
START
AMPM
COOL
DRY
AUTO
FAN
HEAT
●Room temperature thermistor.
●Indoor coil thermistor.
Independent Control of
Outdoor Unit
OUTPUT to indoor unit
INPUT from indoor unit
12VDC
●Receives orders from remote controller and temperature
data from indoor unit.
●Processes orders and data.
●Controls indoor and outdoor operation.
●Self diagnostic function
wSystem control operation.<Optional>
wEmergency operation
●Fan: ON-OFF.
●Fan speed: HIGH-LOW.
●AUTO vane’s angle setting.
●Emergency stop.
INPUT from outdoor unit
●Compressor protection device working.
OUTPUT to outdoor unit
●Compressor motor and outdoor fan motor : ON-OFF.
OUTPUT CONTROLLER
BOARD
●Receives orders from
indoor controller.
●Emergency stop.
polar, two (2) - core cable
Outdoor unit
INDOOR CONTROLLER BOARD
Indoor unit
OC275--1.qxp 01/12/14 3:06 PM Page 20