Mitsubishi Electric PK-2.5FLD Operating manual

TECHNICAL & SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES·······················2
2. COMBINATION OF INDOOR
AND OUTDOOR UNITS········2
3. PART NAMES AND FUNCTIONS········2
4. SPECIFICATIONS·································5
5. DATA·····················································9
6. OUTLINES AND DIMENSIONS··········12
7. WIRING DIAGRAM·····························15
8. REFRIGERANT SYSTEM DIAGRAM ······16
9. OPERATION FLOW-CHART··············17
10. MICROPROCESSOR CONTROL·······20
11. TROUBLESHOOTING ························29
12. DISASSEMBLY PROCEDURE···········33
13. PARTS LIST········································36
14. OPTIONAL PARTS·····························42
Indoor unit
[ Model names ] [ Service Ref. ]
2000, 2001 2000 2001
PK-2.5FLD PK-2.5FLD PK-2.5FLD1
PK-2.5FLD
2
PK-3FLD PK-3FLD PK-3FLD
1
PK-3FLD
2
PK-4FLSD PK-4FLD PK-4FLSD
1
PK-4FLSD
2
No. OC232
REVISED EDITION-A
2000
Indoor unit
Wall Mounted
Series PK
TEMP
ON / OFF
NOT AVAILABLE
AM
PM
AM
PM
˚C
REMOTE CONTROLLER
PK-P2.5FLD1, PK-P3FLD1,
PK-P4FLSD1, PK-P2.5FLD2,
PK-P3FLD2and PK-4FLSD2
are added in REVISED
EDITION-A.
Please void OC232.
This manual does not cover
the following outdoor units.
When servicing them,
please refer to the service
manual No.OC127
REVISED EDITION-A,
OC187 and this manual in
a set.
[ Service Ref. ]
(OC127 REVISED
EDITION-A)
PU-2.5VJA2, PU-2.5NJA1,
PU-3NJA1, PU-4VLJSA2,
PU-4YJSA3, PU-4TJSA2
(OC187)
PU-3VJC, PU-3YJC
SPLIT-TYPE, AIR CONDITIONERS
PK-2.5FLD2
PK-3FLD2
PK-4FLSD2
PK-2.5FLD, PK-2.5FLD1
PK-3FLD, PK-3FLD1
PK-4FLSD, PK-4FLSD1
OC232--1.qxp 01.10.1 9:17 PM Page 1

2
1TECHNICAL CHANGES
3PART NAMES AND FUNCTIONS
● Indoor Unit
Air intake
Room air is suctioned
in here. (Removes dust and dirt from the intake air.)
Disperses airflow up and
down as well as adjusts the
angle of air flow direction.
Filter Air intake grille
Air outletAir outlet
Swing louvers
Air flow can be changed to horizontally
by moving the Guide vane to the left or
right.
Guide vane
PK-2.5FLD ➔PK-2.5FLD1
PK-3FLD ➔PK-3FLD1
PK-4FLSD ➔PK-4FLSD1
●NOSE has changed by changing its shape.
●BOX ASSEMBLY has changed by changing its shape.
●CENTER SUPPORT has changed by changing its shape.
●DRAIN PAN has changed by changing its shape.
PK-2.5FLD1➔PK-2.5FLD2
PK-3FLD1➔PK-3FLD2
PK-4FLSD1➔PK-4FLSD2
●The parts No. of REMOTE CONTROLLER has changed.
(The following parts numbers are interchangeable.)
[ T7W 570 200 ] [ T7W E06 714 ]
TEMP
ON / OFF
NOTAVAILABLE
AM
PM
AM
PM
˚C
2COMBINATION OF INDOOR AND OUTDOOR UNITS
Outdoor unit
(OC187)
Outdoor unit
(OC127 REVISED EDITION-A)
VJA2NJA1NJA1 VLJSA 2 YJSA3TJSA2VJC YJC
PU-2.5 PU-3 PU-4 PU-3
PK-2.5FLD
PK-2.5FLD1
PK-2.5FLD2
PK-3FLD
PK-3FLD1
PK-3FLD2
PK-4FLSD
PK-4FLSD1
PK-4FLSD2
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Indoor unit
OC232--1.qxp 01.10.1 9:17 PM Page 2

3
TEMP
ON / OFF
NOT AVAILABLE
AM
PM
AM
PM
˚C
MODE
FAN
VANE STOP
START
CLOCK
HR MIN.
ON / OFF
display
OPERATION MODE display
Operation mode display indicates which opera-
tion mode is in effect.
• • display
CHECK&TEST RUN display indicates that the
unit is being checked or test-run.
TEST RUNCHECK
PK-2.5FLD, PK-3FLD, PK-4FLSD
PK-2.5FLD1, PK-3FLD1, PK-4FLSD1
● Wireless remote controller
●When cover is closed.
display
Displays when batteries are dead.
display
Displays when setting timer.
display
Lights when signal is sent from the remote
controller to the indoor unit.
display
The vertical direction of airflow is indicated in
marks.
display
FAN SPEED display indicates which fan speed
has been selected.
▼
MODE SELECT button
MODE SELECT button is used to change
cooling, dry (dehumidify) and ventilation oper-
ation modes.
FAN SPEED SELECT button
FAN SPEED SELECT button selects low or
high fan speed.
VANE CONTROL button
VANE CONTROL button regulates the vertical
distribution of airflow.
display
SET TEMP. display indicates desired tempera-
ture set.
CLOCK display
DIsplays the current time.
“ ”display
Flashes when the current time is displayed.
TIMER display
Displays when in timer operation or when set-
ting timer.
“ ” “ ” display
Displays the order of timer operation.
“ ” “ ” display
Displays whether timer is on or off.
button
Push to start operation. Push again to stop
operation.
HR. and MIN.buttons
Buttons used to set the “hour and minute” of
the current time and timer time.
➡
➡
“ ” “ ” display
Displays when the current time and the timer
time can be changed.
▼
▼
SET CLOCK button
Button used to set the current time.
●When cover is open.
button
SET TEMPERATURE button sets any desired
room temperature.
TIMER CONTROL buttons
STOP (OFF timer): when this switch is set,
the air conditioner will be automatically
stopped at the preset time.
START (ON timer): when this switch is set, the
air conditioner will be automatically started at
the preset time.
Part No.
[ T7W 570 200 ]
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4
PK-2.5FLD2, PK-3FLD2, PK-4FLSD2
●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
CHECK TEST RUN
˚C
AMPM
AMPM
VANE CONTROL button
Used to change the air flow direction.
CLOCK button
RESET button
SET button
ON/OFF button
The unit is turned ON and OFF alternately
each time the button is pressed.
LOUVER button
This switch the horizontal fan motion ON
and OFF.
(Not available for this model.)
MODE SELECT button
Used to switch the operation mode between
cooling, drying, 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
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.
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
Part No.
[ T7W E06 714 ]
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5
SPECIFICATIONS
4
w4
w5
22,700
6,650
3.54
3.44
15.8(99)
58
27/19.0°C, 35/24°C
Cooling (JIS B8616)
PK-2.5FLD PK-2.5FLD1PK-2.5FLD2
PK-2.5FLD PK-2.5FLD1PK-2.5FLD2
Munsell 3.4Y 7.7/0.8(White)
Plate fin coil
Line flow (direct) o2
0.04
15 - 20(530-706)
0 (direct blow)
—
Wireless remote controller & Built-in
39 - 45
20 (13/16)
1,400 (55-1/8)
235 (9-1/4)
340 (13-3/8)
24 (53)
23,900
7,000
2.56 / 2.62
PU-2.5VJA2
Single, 50Hz, 220/240V
2.46 / 2.52
11.4 / 10.7 (98/98)
45 / 49
24,400
7,150
3.01
PU-2.5NJA1
Single, 60Hz, 220V
2.91
13.4 (99)
58
Munsell 5Y 7/1
Capillary tube
Hermetic
Line start
Inner thermostat, HP/LP switch
Plate fin coil
Propeller (direct) o1
0.085
50 (1765)
—
870 (34-1/4)
295 (+24) (11-5/8 (add 1))
850 (33-7/16)
71 (157)
9.52 (3/8)
15.88 (5/8)
Flared
Flared
w3 Max. 20m
w3 Max. 30m
NHJ41VMD
2.0
32 / 38
NHJ38NBD
1.7
—
52 53
R-22 2.4 (5.3) R-22 2.4 (5.3)
Single, 60Hz, 220V
0.095
0.44 (98)
0.7
Single, 50Hz, 220/240V
0.095 / 0.095
0.44 / 0.44 (98/90)
0.7 / 0.8
Item Service Ref.
Condition
Capacity w1
Total input w1
Service Ref.
Power supply(phase, cycle, voltage)
Input
Running current (Power factor)
Starting current
External finish
Heat exchanger
Fan(drive) oNo.
Fan motor output
Airflow (Low-High)
External static pressure
Booster heater
Operation control & Thermostat
Noise level (Low-High) w2
Unit drain pipe. O.D.
Dimensions
Weight
Service Ref.
Power supply (phase, cycle, voltage)
Input
Running current (Power factor)
Starting current
External finish
Refrigerant control
Compressor
Model
Motor output
Starter type
Protection devices
Crankcase heater
Heat exchanger
Fan(drive) oNo.
Fan motor output
Airflow
Defrost method
Noise level w2
Dimensions
Weight
Refrigerant Charge
Pipe size O.D.
Connection method
Between the indoor &
outdoor units
Btu/h
W
kW
kW
A(%)
A
kW
m3/min(CFM)
Pa(mmAq)
kW
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
kW
A(%)
A
kW
W
kW
m3/min(CFM)
dB(A)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
kg(lbs)
mm(in.)
mm(in.)
Indoor, Outdoor D.B./W.B.°C
Liquid
Gas
W
D
H
W
D
H
REFRIGERANT PIPING
OUTDOOR UNIT
Indoor side
Outdoor side
Height difference
Piping length
INDOOR UNIT
Fan
Fan
w1 Refrigerant piping length (one way) : 5m (16ft)
w2 Noise level is measured in an unacoustic room based on JIS conditions.
w3 Up to 20m it is unnecessary to charge additional refrigerant.
w4 Indoor, Outdoor D.B./W.B. : 29/19°C, 46/24°C.
w5 Cooling SSA385, 386
1. STANDARD SPECIFICATION
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6
Item Service Ref. PK-3FLD PK-3FLD1PK-3FLD2
PK-3FLD PK-3FLD1PK-3FLD2
27/19.0°C, 35/24°C
Cooling (JIS B8616)
Munsell 3.4Y 7.7/0.8(White)
Plate fin coil
Line flow (direct) o2
0.04
15 - 20 (530-706)
0 (direct blow)
—
Wireless remote controller & Built-in
39 - 45
20 (13/16)
1,400 (55-1/8)
235 (9-1/4)
340 (13-3/8)
24 (53)
27,000
7,900
3.28 / 3.30 3.28 / 3.30
28,400
8,200
3.54
Single, 50Hz, 220/240V
0.095 / 0.095
0.44 / 0.44 (98/90)
0.7 / 0.8
Single, 60Hz, 220V
0.095
0.44 (98)
0.7
w4
w5
23,500
6,900
4.19
4.09
20.9(89)
80
PU-3VJC
Single, 50Hz, 220/240V
3.18 / 3.20
15.1/13.9(96/96)
54 / 58
PU-3YJC
3, 50Hz, 380/415V
3.18 / 3.20
5.7/5.3(85/84)
34 / 37
NH52VND
2.2 NH52YDE 2.4
3.44
17.6(89)
80
PU-3NJA1
Single, 60Hz, 220V
NHJ47NAD
2.2
w6w7
52 53
w6
R-22 2.8 (6.2)
R-22 3.5 (7.7)
32 / 38 32 / 38 38
Munsell 5Y 7/1
Capillary tube
Hermetic
Line start
Plate fin coil
Propeller (direct) o1
0.085
50 (1765)
—
870 (34-1/4)
295 (+24) (11-5/8 (add 1))
850 (33-7/16)
73 (161)
9.52 (3/8)
15.88 (5/8)
Flared
Flared
w3 Max. 20m
w3 Max. 30m
Condition
Capacity w1
Total input w1
Service Ref.
Power supply(phase, cycle, voltage)
Input
Running current (Power factor)
Starting current
External finish
Heat exchanger
Fan(drive) oNo.
Fan motor output
Airflow (Low-High)
External static pressure
Booster heater
Operation control & Thermostat
Noise level (Low-High) w2
Unit drain pipe. O.D.
Dimensions
Weight
Service Ref.
Power supply (phase, cycle, voltage)
Input
Running current (Power factor)
Starting current
External finish
Refrigerant control
Compressor
Model
Motor output
Starter type
Protection devices
Crankcase heater
Heat exchanger
Fan(drive) o No.
Fan motor output
Airflow
Defrost method
Noise level w2
Dimensions
Weight
Refrigerant Charge
Pipe size O.D.
Connection method
Between the indoor &
outdoor units
Btu/h
W
kW
kW
A(%)
A
kW
m3/min(CFM)
Pa(mmAq)
kW
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
kW
A(%)
A
kW
W
kW
m3/min(CFM)
dB
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
kg(lbs)
mm(in.)
mm(in.)
Indoor, Outdoor D.B./W.B.°C
Liquid
Gas
W
D
H
W
D
H
REFRIGERANT PIPING
OUTDOOR UNIT
Indoor side
Outdoor side
Height difference
Piping length
INDOOR UNIT
Fan
Fan
w1 Refrigerant piping length (one way) : 5m (16ft)
w2 Noise level is measured in an unacoustic room based on JIS conditions.
w3 Up to 20m it is unnecessary to charge additional refrigerant.
w4 Indoor, Outdoor D.B./W.B. : 29/19°C, 46/24°C
w5 Cooling SSA385, 386
w6 Inner thermostat, HP switch, LP switch.
w7 Thermal switch, Reversed-phase protector, HP switch, LP switch, Thermal relay.
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7
Item Service Ref. PK-4FLSD PK-4FLSD1PK-4FLSD2
27/19.0°C, 35/24°C
Cooling (JIS B8616)
w4
w5
33,800
9,900
5.08
39,000
11,400
4.38
35,200
10,300
3.46 / 3.63 3.40 / 3.47
PU-4VLJSA2
Single, 50Hz, 220/240V
3.35 / 3.52
16.9 / 16.3 (90/90)
79 / 79
PU-4YJSA3
3, 50Hz, 380/415V
3.29 / 3.36
5.7 / 5.5 (87/85)
38 / 38
NH56VND
2.7 NHJ56YDE 2.7 Line start
Munsell 5Y 7/1
Capillary tube
Hermetic
Plate fin coil
Propeller (direct) o2
0.065 + 0.065
95 (3352)
—
870 (34-1/4)
295 (+24) (11-5/8 (add 1))
1258 (49-1/2)
94 (207)
9.52 (3/8)
19.05 (4/3)
Flared
Flared
w3 Max. 30m
w3 Max. 40m
PU-4TJSA2
3, 60Hz, 220V
4.27
12.2 (92)
69
NHJ56TKA
2.7
w6w7w7
54 55 55
32 / 38 32 / 38 38
R-22 3.8 (8.4) R-22 4.6 (10.1) R-22 4.6 (10.1)
4.97
14.0(93)
69
PK-4FLSD PK-4FLSD1PK-4FLSD2
Munsell 3.4Y 7.7/0.8(White)
Plate fin coil
Line flow (direct) o2
0.07
22 - 28 (777 - 989)
0 (direct blow)
—
Wireless remote controller & Built-in
41 - 46
20 (13/16)
1,680 (66-1/8)
235 (9-1/4)
340 (13-3/8)
28 (62)
Single, 50Hz, 220/240V
0.114 / 0.114
0.53 / 0.53 (98/90)
0.8 / 0.9
Single, 60Hz, 220V
0.114
0.53 (98)
0.8
Condition
Capacity w1
Total input w1
Service Ref.
Power supply(phase, cycle, voltage)
Input
Running current (Power factor)
Starting current
External finish
Heat exchanger
Fan(drive) oNo.
Fan motor output
Airflow (Low-High)
External static pressure
Booster heater
Operation control & Thermostat
Noise level (Low-High) w2
Unit drain pipe. O.D.
Dimensions
Weight
Service Ref.
Power supply (phase, cycle, voltage)
Input
Running current (Power factor)
Starting current
External finish
Refrigerant control
Compressor
Model
Motor output
Starter type
Protection devices
Crankcase heater
Heat exchanger
Fan(drive) oNo.
Fan motor output
Airflow
Defrost method
Noise level w2
Dimensions
Weight
Refrigerant Charge
Pipe size O.D.
Connection method
Between the indoor &
outdoor units
Btu/h
W
kW
kW
A(%)
A
kW
m3/min(CFM)
Pa(mmAq)
kW
dB
mm(in.)
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
kW
A(%)
A
kW
W
kW
m3/min(CFM)
dB
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
kg(lbs)
mm(in.)
mm(in.)
Liquid
Gas
W
D
H
W
D
H
REFRIGERANT PIPING
OUTDOOR UNIT
Indoor side
Outdoor side
Height difference
Piping length
INDOOR UNIT
Indoor, Outdoor D.B./W.B.°C
Fan
Fan
w1 Refrigerant piping length (one way) : 5m (16ft)
w2 Noise level is measured in an unacoustic room based on JIS conditions.
w3 Up to 20m it is unnecessary to charge additional refrigerant.
w4 Indoor, Outdoor D.B./W.B. : 29/19°C, 46/24°C
w5 Cooling SSA385, 386
w6 Inner thermostat, HP switch, LP switch, Thermal switch
w7 Thermal switch, Reversed-phase protector, HP switch, LP switch, Thermal relay.
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8
2. POWER SUPPLY & MODEL NAMES
Notes : 1. Power supply key N …… 1ph, 220V, 60Hz Y …3ph, 380/220, 400/230,
V(L) …1ph, 220, 230 240V, 50Hz 415/240V, 50Hz, 4 wires
T…… 3ph, 220V, 60Hz
2. Primary power supplies for all indoor units are single-phase.
3. ELECTRICAL SPECIFICATION
Rating conditions
Series PK Indoor Unit (Single Phase)
JIS B8615, 8616 Indoor : D.B. 27°C (80°F), W.B. 19°C(66°F)
Outdoor : D.B. 35°C (95°F)
Power supply Service Ref. (Indoor unit)
Service Ref. (Outdoor unit)
50Hz 1ph.
3ph.
1ph.
3ph.
220,230,240V
380/220,400/230,415/240V
220V
220V
PK-2.5FLD
PK-2.5FLD1
PK-2.5FLD2
PU-2.5VJA2
—
PU-2.5NJA1
—
PK-3FLD
PK-3FLD1
PK-3FLD2
PU-3VJC
PU-3YJC
PU-3NJA1
—
PK-4FLSD
PK-4FLSD1
PK-4FLSD2
PU-4VLJSA2
PU-4YJSA3
—
PU-4TJSA2
60Hz
Power supply (1 Phase) V : 220V 50Hz V : 230V 50Hz
Service Ref.
PK-2.5FLD
PK-2.5FLD1
PK-2.5FLD2
0.44
0.095
0.7
PU-2.5
PK-3FLD
PK-3FLD1
PK-3FLD2
0.44
0.095
0.7
PU-3
PK-4FLSD
PK-4FLSD1
PK-4FLSD2
0.53
0.114
0.8
PU-4
PK-2.5FLD
PK-2.5FLD1
PK-2.5FLD2
0.44
0.095
0.8
PU-2.5
PK-3FLD
PK-3FLD1
PK-3FLD2
0.44
0.095
0.8
PU-3
PK-4FLSD
PK-4FLSD1
PK-4FLSD2
0.53
0.114
0.8
PU-4
Current
Input
Starting current
Outdoor unit
A
kW
A
Power supply (1 Phase) V : 240V 50Hz N : 220V 60Hz
Service Ref.
PK-2.5FLD
PK-2.5FLD1
PK-2.5FLD2
0.44
0.095
0.8
PU-2.5
PK-3FLD
PK-3FLD1
PK-3FLD2
0.44
0.095
0.8
PU-3
PK-4FLSD
PK-4FLSD1
PK-4FLSD2
0.53
0.114
0.9
PU-4
PK-2.5FLD
PK-2.5FLD1
PK-2.5FLD2
0.44
0.095
0.7
PU-2.5
PK-3FLD
PK-3FLD1
PK-3FLD2
0.44
0.095
0.7
PU-3
PK-4FLSD
PK-4FLSD1
PK-4FLSD2
0.53
0.114
0.8
PU-4
Current
Input
Starting current
Outdoor unit
A
kW
A
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9
DATA5
1. PERFORMANCE DATA
COOLING CAPACITY 50Hz
Notes: 1. T.C.: Total capacity (kW) …(kcal/h)=(kW)x860, (Btu/h)=4x(kW)x860
C.F.(T.I.) : Correction factors of Total input(Indoor unit input + Outdoor unit input)
2. (°F)=32+9/5(°C)
3. Guaranteed operating range(cooling){Lower limit … Indoor : D.B. 21°C(70°F), W.B. 15.5°C(60°F), Outdoor : D.B. 21°C(70°F).
Upper limit … Indoor : D.B. 35°C(95°F), W.B. 22.5°C(72.5°F), Outdoor : D.B. 452°C(125.5°F).
ServiceRef.
Temperature
PK-2.5FLD
PK-2.5FLD1
PK-2.5FLD2
T.C. C.F.
(T.I.)
PK-3FLD
PK-3FLD1
PK-3FLD2
T.C. C.F.
(T.I.)
PK-4FLSD
PK-4FLSD1
PK-4.5FLSD2
T.C. C.F.
(T.I.)
OutdoorD.B.
21:
(69.8°F)
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67°F)
20:(68°F)
22:(71.6°F)
7.0
7.5
7.7
7.8
7.9
8.4
0.81
0.82
0.83
0.83
0.84
0.86
7.9
8.4
8.7
8.8
9.0
9.5
0.81
0.82
0.83
0.83
0.84
0.86
10.4
11.0
11.3
11.5
11.7
12.4
0.81
0.82
0.83
0.83
0.84
0.86
6.9
7.3
7.6
7.7
7.8
8.3
0.84
0.85
0.86
0.86
0.87
0.89
7.7
8.3
8.5
8.7
8.8
9.4
0.84
0.85
0.86
0.86
0.87
0.89
10.1
10.8
11.1
11.3
11.5
12.2
0.84
0.85
0.86
0.86
0.87
0.89
6.6
7.1
7.3
7.4
7.5
8.0
0.90
0.92
0.93
0.93
0.94
0.96
7.5
8.0
8.2
8.4
8.5
9.0
0.90
0.92
0.93
0.93
0.94
0.96
9.7
10.4
10.7
10.9
11.1
11.8
0.90
0.92
0.93
0.93
0.94
0.96
6.5
6.9
7.1
7.2
7.4
7.8
0.93
0.95
0.96
0.97
0.97
0.99
7.3
7.8
8.1
8.2
8.3
8.8
0.93
0.95
0.96
0.97
0.97
0.99
9.6
10.1
10.5
10.7
10.9
11.5
0.93
0.95
0.96
0.97
0.97
0.99
6.3
6.8
7.0
7.1
7.2
7.7
0.96
0.99
1.00
1.00
1.01
1.04
7.2
7.6
7.9
8.0
8.2
8.7
0.96
0.99
1.00
1.00
1.01
1.04
9.3
10.0
10.3
10.5
10.6
11.3
0.96
0.99
1.00
1.00
1.01
1.04
6.1
6.5
6.7
6.8
6.9
7.4
10.3
1.06
1.07
1.08
1.08
1.11
6.8
7.3
7.6
7.7
7.8
8.3
1.03
1.06
1.07
1.08
1.08
1.11
8.9
9.5
9.9
10.0
10.2
10.9
1.03
1.06
1.07
1.08
1.08
1.11
6.0
6.4
6.7
6.8
6.9
7.4
1.04
1.06
1.08
1.08
1.09
1.12
6.8
7.3
7.5
7.6
7.8
8.3
1.04
1.06
1.08
1.08
1.09
1.12
8.9
9.5
9.8
9.9
10.1
10.8
1.04
1.06
1.08
1.08
1.09
1.12
5.8
6.2
6.4
6.5
6.6
7.1
1.10
1.12
1.14
1.15
1.16
1.20
6.5
7.0
7.2
7.3
7.5
8.0
1.10
1.12
1.14
1.15
1.16
1.20
8.5
9.1
9.4
9.5
9.7
10.4
1.10
1.12
1.14
1.15
1.16
1.20
5.7
6.1
6.4
6.4
6.5
7.0
1.11
1.14
1.15
1.16
1.17
1.21
6.4
6.9
7.2
7.2
7.4
7.9
1.11
1.14
1.15
1.16
1.17
1.21
8.4
9.0
9.4
9.4
9.6
10.3
1.11
1.14
1.15
1.16
1.17
1.21
5.4
5.9
6.1
6.2
6.2
6.8
1.16
1.19
1.21
1.22
1.23
1.28
6.1
6.6
6.8
6.9
7.0
7.6
1.16
1.19
1.21
1.22
1.23
1.28
8.0
8.6
8.9
9.1
9.2
9.9
1.16
1.19
1.21
1.22
1.23
1.28
20
0.11
0.81
20
0.12
0.73
28
0.12
0.75
5.3
5.7
5.9
6.0
6.2
6.6
1.19
1.22
1.24
1.25
1.26
1.31
6.0
6.5
6.7
6.8
7.0
7.5
1.19
1.22
1.24
1.25
1.26
1.31
7.8
8.4
8.7
8.9
9.1
9.7
1.19
1.22
1.24
1.25
1.26
1.31
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67°F)
20:(68°F)
22:(71.6°F)
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67°F)
20:(68°F)
22:(71.6°F)
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67°F)
20:(68°F)
22:(71.6°F)
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67°F)
20:(68°F)
22:(71.6°F)
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67°F)
20:(68°F)
22:(71.6°F)
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67°F)
20:(68°F)
22:(71.6°F)
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67 °F)
20:(68 °F)
22:(71.6°F)
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67 °F)
20:(68 °F)
22:(71.6°F)
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67 °F)
20:(68 °F)
22:(71.6°F)
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67 °F)
20:(68 °F)
22:(71.6°F)
25:
(77°F)
30:
(86°F)
32.2:
(90°F)
35:
(95°F)
40:
(104°F)
40.6:
(105°F)
45:
(113°F)
46:
(115 °F)
50:
(69.8°F)
52:
(125.5°F)
Evaporator airflow (CMM)
Bypassfactors
S.H.F. at ratingconditions
IndoorW.B.
OC232--1.qxp 01.10.1 9:17 PM Page 9

10
COOLING CAPACITY 60Hz
Notes: 1. T.C.: Total capacity (kW) …(kcal/h)=(kW)x860, (Btu/h)=4x(kW)x860
C.F.(T.I.) : Correction factors of Total input(Indoor unit input + Outdoor unit input)
2. (°F)=32+9/5(°C)
3. Guaranteed operating range(cooling){Lower limit … Indoor : D.B. 21°C(70°F), W.B. 15.5°C(60°F), Outdoor : D.B. 21°C(70°F).
Upper limit … Indoor : D.B. 35°C(95°F), W.B. 22.5°C(72.5°F), Outdoor : D.B. 52°C(125.5°F)…NJ, TJ
ServiceRef.
Temperature
OutdoorD.B.
21:
(69.8°F)
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67°F)
20:(68°F)
22:(71.6°F)
0.81
0.82
0.83
0.83
0.84
0.86
0.84
0.85
0.86
0.86
0.87
0.89
0.90
0.92
0.93
0.93
0.94
0.96
0.93
0.95
0.96
0.97
0.97
0.99
0.96
0.99
1.00
1.00
1.01
1.04
1.03
1.06
1.07
1.08
1.08
1.11
1.04
1.06
1.08
1.08
1.09
1.12
1.10
1.12
1.14
1.15
1.16
1.20
1.11
1.14
1.15
1.16
1.17
1.21
1.16
1.19
1.21
1.22
1.23
1.28
1.19
1.22
1.24
1.25
1.26
1.31
0.81
0.82
0.83
0.83
0.84
0.86
0.84
0.85
0.86
0.86
0.87
0.89
0.90
0.92
0.93
0.93
0.94
0.96
0.93
0.95
0.96
0.97
0.97
0.99
0.96
0.99
1.00
1.00
1.01
1.04
1.03
1.06
1.07
1.08
1.08
1.11
1.04
1.06
1.08
1.08
1.09
1.12
1.10
1.12
1.14
1.15
1.16
1.20
1.11
1.14
1.15
1.16
1.17
1.21
1.16
1.19
1.21
1.22
1.23
1.28
1.19
1.22
1.24
1.25
1.26
1.31
0.81
0.82
0.83
0.83
0.84
0.86
0.84
0.85
0.86
0.86
0.87
0.89
0.90
0.92
0.93
0.93
0.94
0.96
0.93
0.95
0.96
0.97
0.97
0.99
0.96
0.99
1.00
1.00
1.01
1.04
1.03
1.06
1.07
1.08
1.08
1.11
1.04
1.06
1.08
1.08
1.09
1.12
1.10
1.12
1.14
1.15
1.16
1.20
1.11
1.14
1.15
1.16
1.17
1.21
1.16
1.19
1.21
1.22
1.23
1.28
1.19
1.22
1.24
1.25
1.26
1.31
PK-2.5FLD
PK-2.5FLD1
PK-2.5FLD2
T.C. C.F.
(T.I.)
7.2
7.6
7.9
8.0
8.1
8.6
PK-3FLD
PK-3FLD1
PK-3FLD2
T.C. C.F.
(T.I.)
8.2
8.7
9.0
9.1
9.3
9.8
PK-4FLSD
PK-4FLSD1
PK-4FLSD2
T.C. C.F.
(T.I.)
11.5
12.1
12.5
12.7
12.9
13.7
7.0
7.5
7.7
7.8
8.0
8.5
8.0
8.6
8.9
9.0
9.1
9.7
11.2
11.9
12.3
12.5
12.7
13.5
6.8
7.2
7.4
7.6
7.7
8.2
7.7
8.3
8.5
8.7
8.8
9.4
10.8
11.5
11.9
12.1
12.2
13.0
6.6
7.0
7.3
7.4
7.5
8.0
7.6
8.1
8.4
8.5
8.7
9.2
10.6
11.2
11.6
11.8
12.0
12.8
6.5
6.9
7.2
7.3
7.4
7.9
7.4
7.9
8.2
8.3
8.5
9.0
10.3
11.0
11.4
11.6
11.8
12.5
6.2
6.6
6.8
7.0
7.1
7.6
7.1
7.6
7.9
8.0
8.1
8.7
9.9
10.6
10.9
11.1
11.3
12.0
6.1
6.6
6.8
6.9
7.0
7.5
7.1
7.5
7.8
7.9
8.1
8.6
9.8
10.5
10.8
11.0
11.2
12.0
5.9
6.3
6.5
6.6
6.7
7.2
6.8
7.2
7.5
7.6
7.7
8.3
9.4
10.1
10.4
10.5
10.8
11.5
5.8
6.2
6.5
6.6
6.7
7.2
6.7
7.1
7.5
7.5
7.7
8.2
9.3
9.9
10.4
10.5
10.7
11.4
5.6
6.0
6.2
6.3
6.4
6.9
6.4
6.9
7.1
7.2
7.3
7.9
8.9
9.5
9.9
10.0
10.1
11.0
5.4
5.9
6.0
6.2
6.3
6.8
6.2
6.7
6.9
7.1
7.2
7.7
8.7
9.3
9.6
9.8
10.0
10.8
IndoorW.B.
20
0.11
0.78
20
0.12
0.72
28
0.12
0.72
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67°F)
20:(68°F)
22:(71.6°F)
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67°F)
20:(68°F)
22:(71.6°F)
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67°F)
20:(68°F)
22:(71.6°F)
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67°F)
20:(68°F)
22:(71.6°F)
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67°F)
20:(68°F)
22:(71.6°F)
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67°F)
20:(68°F)
22:(71.6°F)
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67°F)
20:(68°F)
22:(71.6°F)
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67°F)
20:(68°F)
22:(71.6°F)
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67°F)
20:(68°F)
22:(71.6°F)
16:(60.8°F)
18:(64.4°F)
19:(66.2°F)
19.4:(67°F)
20:(68°F)
22:(71.6°F)
25:
(77°F)
30:
(86°F)
32.2:
(90°F)
35:
(95°F)
40:
(104°F)
40.6:
(105°F)
45:
(113 °F)
46:
(115 °F)
50:
(69.8°F)
52:
(125.5°F)
Evaporator airflow (CMM)
Bypassfactors
S.H.F. at ratingconditions
OC232--1.qxp 01.10.1 9:17 PM Page 10

11
2. STANDARD OPERATION DATA
Total Electrical circuit Refrigerant circuit Indoor side Outdoor side
The unit of pressure has been changed to Mpa on the international system of unit(SI unit system).
The converted score against the traditional unit system can be gotten according to the formula below.
1(Mpa)=10.2(OO/FF)
3. ADDITIONAL REFRIGERANT CHARGE (R-22…kg(lbs))
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 temp.
Ref. pipe length
Intake air temperature
Discharge air temperature
Intake air temperature
W
kw
Mpa
(O/F)
Mpa
(O/F)
:
:
:
m
:
:
:
:
:
D.B.
W.B.
D.B.
D.B.
W.B.
Service Ref.
PK-2.5FLD
PK-2.5FLD1
PK-2.5FLD2
PK-3FLD
PK-3FLD1
PK-3FLD2
PK-4FLSD
PK-4FLSD1
PK-4FLSD2
MODE COOLING
7,000
2.56
PK-2.5FLD
PK-2.5FLD1
PK-2.5FLD2
1,50
220
0.44
1,50
220
11.4
2.05
(20.9)
0.47
(4.79)
74.3
52
10.3
5
27
19
14.4
35
24
PU-
2.5VJA2
COOLING
6,650
3.54
1,60
220
0.44
1,60
220
15.8
2.13
(21.7)
0.44
(4.49)
87
54
10
5
29
19
14.1
46
24
PU-
2.5NJA1
COOLING
7,900
3.28
PK-3FLD
PK-3FLD1
PK-3FLD2
1,50
220
0.44
1,50
220
15.1
1.99
(20.3)
0.47
(4.79)
86
51
6
5
27
19
13.0
35
24
PU-
3VJC
COOLING
6,900
4.19
1,60
220
0.44
1,60
220
20.9
2.07
(21.1)
0.44
(4.49)
70
53
4
5
29
19
13.2
46
24
PU-
3NJA1
COOLING
10,300
3.46
PK-4FLSD
PK-4FLSD1
PK-4FLSD2
1,50
220
0.53
3,50
380
5.7
1.80
(18.4)
0.48
(4.89)
65
49
6
5
27
19
13.6
35
24
PU-
4YJSA3
COOLING
9,900
5.08
1,60
220
0.53
3,60
220
14.0
1.93
(19.7)
0.45
(4.59)
74
52
5
5
29
19
13.2
46
24
PU-
4TJSA2
TotalElectrical CircuitRefrigerant circuit
Indoor side
Outdoor
side
Service Ref. Outdoor unit precharged (kg)
(up to 20m) Refrigerant piping length (one way)
PK-2.5FLD/1/2
PK-3FLD/1/2
PK-4FLSD/1/2
V---2.4, N---2.4
V---2.8, Y---2.8, N---3.5
VL---3.8, Y---4.6, T---4.6
20m (66ft)
0
0
0
25m (82ft)
0.06(0.13)
0.06(0.13)
0.15(0.33)
30m (98ft)
0.12(0.26)
0.12(0.26)
0.30(0.66)
35m (115ft)
—
—
0.45(0.99)
40m (131ft)
—
—
0.6(1.32)
COOLING CAPACITY correction factors 50Hz
Service Ref. Refrigerant piping length (one way)
5m (16ft)
1.0
1.0
1.0
10m (33ft)
0.983
0.978
0.984
15m (49ft)
0.972
0.962
0.974
20m (66ft)
0.961
0.948
0.964
25m (82ft)
0.951
0.934
0.954
30m (98ft)
0.940
0.921
0.944
35m (115ft)
—
—
0.914
40m (13ft)
—
—
0.902
PK-2.5FLD/1/2
PK-3FLD/1/2
PK-4FLSD/1/2
COOLING CAPACITY correction factors 60Hz Refrigerant piping length (one way)
Service Ref. 5m (16ft)
1.0
1.0
1.0
10m (33ft)
0.978
0.971
0.980
15m (49ft)
0.963
0.950
0.966
20m (66ft)
0.948
0.931
0.952
25m (82ft)
0.934
0.913
0.939
30m (98ft)
0.921
0.896
0.926
35m (115ft)
—
—
0.941
40m (131ft)
—
—
0.902
PK-2.5FLD/1/2
PK-3FLD/1/2
PK-4FLSD/1/2
OC232--1.qxp 01.10.1 9:17 PM Page 11

12
6OUTLINES AND DIMENSIONS
PK-2.5FLD
PK-2.5FLD1
PK-3FLD
PK-3FLD1
PK-4FLSD
PK-4FLSD1
PK-2.5FLD2
PK-3FLD2
PK-4FLSD2
TEMP
ON / OFF
NOT AVAILABLE
AM
PM
AM
PM
˚C
153
57 18 3
55
58
162
19
ON/OFF TEMP
MODEL SELECT
NOT AVAILABLE
CHECK TEST RUN
˚C
AMPM
AMPM
4. 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 furni-
ture inside the room.
Airflow
Air speed
Coverage rangew
Airflow
Air speed
Coverage rangew
m3/min
m/sec.
m(ft)
m3/min
m/sec.
m(ft)
60Hz 50Hz
Frequency
Configuration Wall mounted
Service Ref.
20
4.9
12.4(41)
20
4.9
12.4(41)
PK-2.5FLD
PK-2.5FLD1
PK-2.5FLD2
20
4.9
12.4(41)
20
4.9
12.4(41)
PK-3FLD
PK-3FLD1
PK-3FLD2
28
5.4
15.3(50)
28
5.4
15.3(50)
PK-4FLSD
PK-4FLSD1
PK-4FLSD2
Unit : mm
1. REMOTE CONTROLLER
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13
Unit : mm
235
45
235
45
235
45
235
62.5
13
58 42
340
197
Top
Front Right side
Left side 1400
1090 Air intake 235
C
Knock out hole for right piping
Refrigerant pipe. Drain pipe
Knock out hole for
left piping
Drain hose for
left-hand side piping Drain hose
Lower side
Auto vane
(Gas pipe) Drain hose
Bolt
Gas pipe
15
Terminal block for power supply
Terminal block for control
(Liquid pipe)
Liquid pipe 9.52(3/8F)
Gas pipe 15.88(5/8F)
Liquid pipe
A
30
32
39 98
37
74
439
100
30
37
74
4
2980
280
3030
18430
60
10
39
37
65
100
AB C
Knock out hole for piping
25
1110 183
240
B
1120 552
55
120 107
111
Air outlet
552 Air outlet
Change vane (manual)
Under panel
Removable at left-hand
side piping Knock out hole for under-piping
Refrigerant pipe. Drain pipe
Rear piping opening
Range for left rear piping opening
12-ø6 hole for
tapping screw
66-ø6 hole for
tapping screw
Wall fixture
Unit center
32-ø12 hole for bolt 225
18 18 91
900
990 455 285
245
19
240 280 314
610 90
Drainage range
on left-hand side Drainage range on right-hand side
10 91=(910)
180
2. INDOOR UNIT
PK-2.5FLD PK-3FLD
PK-2.5FLD1PK-3FLD1
PK-2.5FLD2PK-3FLD2
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14
Unit : mm
235
45
235
45
235
45
235
45
235
62.5
13
58 42
340
197
Top
Front Right side
Left side 1680
1370 Air intake 235
C
Knock out hole for right piping
Knock out hole for left piping
Drain hose for left-hand side piping Drain hose
Drain hose
Lower side
Auto vane
(Gas pipe)
Bolt
Gas pipe
15 Terminal block for power supply
Terminal block for control
(Liquid pipe) Gas pipe 19.05(3/4F)
Liquid pipe 9.52(3/8F)
Liquid pipe
A
30
32
39 98
37
74
439
100
30
37
74
4
2980
280
3030
18430
60
10
39
37
65
100
AB C
Knock out hole for wiring
25
1110 183
240
B
1400
55
120 102
111
694 Air outlet 694 Air outlet
Change vane (manual)
Under panel
(Removable at left-hand side piping)
Knock out hole for under-piping
Refrigerant pipe. Drain pipe
Rear piping opening
Range for left rear piping openingRange for left rear piping opening
12-ø6 hole for tapping screw
84-ø6 hole for
tapping screw
Wall fixture
Unit out line Unit center
41-ø12 hole for bolt 295 225
18 18 91
900
1270 595 285
245
19
240 280 314
750 90
Drainage range
on right-hand side
13 91=(1183)
180
Drainage range
on left-hand side
PK-4FLSD
PK-4FLSD1
PK-4FLSD2
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15
WIRING DIAGRAM
7
NOTES:
1. Since the indoor fan motor (MF) is connected with 220V power, using 230, 240V power will require a setting change of the dip switch (SW1<I.B>) on the
indoor controller board as shown in fig:w1.
Indoor fan motor (MF) for 230,240V.
2. Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing.
3. Since the indoor transformer (T) is connected with 220V power, if 230,240V power is used. Change the wiring connection showing fig * : 2.
When power supply is
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 con-
troller board.
[Check items]
(1) Compressor and fan.
(2) Check the trouble position using self diagnostic function. If the result of self diagnosis indicates protective device such as freeze protection is functioning
emergency operation is not possible unless the cause is removed.
Emergency operation will be continuous operation mode due to power ON/OFF (ON/OFF with remote controller is not possible).
[Emergency operation procedure]
(1) Set the dip switch (SW3 <I.B>) on the indoor controller board to 1• 2on and 3off for cooling.
(2) Turn on outdoor unit side circuit breaker, then indoor unit side circuit breaker in this order.
(3) During emergency operation indoor fan runs at high speed but automatic vane remains stop. If vane is closed, open the vane by hands.
(4) Thermostat will not function.
(5) Emergency cooling should be limited to 10 hours maximum.
(The indoor unit heat exchanger may freeze).
fig w2
fig w1
220V
230V
240V
230V
220V
RED
ORANGE
YELLOW
1
ON
OFF 2345678 1
ON
OFF 2345678
SW1 SW1
SYMBOL
C
CN2<I.B>
CN2A<I.B>
CN2B<I.B>
CN27<I.B>
CN28<I.B>
CN51<I.B>
F1,2<I.B>
I.B
JR
NAME
FAN MOTOR CAPACITOR
TIMER ADAPTOR CONNECTOR
TRANSMISSION WIRES No.1 CONNECTOR
TRANSMISSION WIRES No.2 CONNECTOR
DRAIN LIFE-UP MECHANISM
TIME SHORTENING CONNECTOR
MULTIPLE CONNECTOR
FUSE(6.3A 250V)
INDOOR CONTROLLER BOARD
JUMPER RESISTORS (FUNCTION SELECTOR)
SYMBOL
MF
MV
RT1
RT2
Ru<W.B>
SW1<I.B>
SW2<I.B>
SW3<I.B>
T
NAME
FAN MOTOR
VANE MOTOR
ROOM TEMPERATURE THERMISTOR
(0%/15k",25°C/5.4k"DETECT)
PIPE TEMPERATURE THERMISTOR
(0%/15k". 25%/5.4k"DETECT)
RECEIVING SELECTOR UNIT
FUNCTION SELECTOR SWITCH
UNIT SELECTOR SWITCH
EMERGENCY OPERATION SWITCH
TRANSFORMER
SYMBOL
TB2
TB4
X4<I.B>
ZNR
SW1<W.B>
LD1<W.B>
W.B
W.R
NAME
TERMINAL BLOCK (POWER SUPPLY)
TERMINAL BLOCK
(INDOOR/OUTDOOR CONNECTING WIRE)
FAN MOTOR RELAY
VARISTOR
ON/OFF SWITCH
LED (RUN INDICATOR)
WIRELESS REMOTE CONTROLLER BOARD
WIRELESS REMOTE CONTROLLER
PK-2.5FLD PK-3FLD PK-4FLD
PK-2.5FLD1PK-3FLD1PK-4FLD1
PK-2.5FLD2PK-3FLD2PK-4FLD2
X4
SW1 OFF
ON
12345678
OFF
ON
12345678
PK-4FLSD
PK-2.5FLD
PK-3FLD
MODELS
REMOTE
CONTROLLER
65432
RT2
2
SW1
CN27
D.U.M
1
JR
N
GRN/YLW
L
I.B
TO OUTDOOR UNIT
CONNECTING WIRES
DC12V
1
T
X4
ZNR
F2 F1
C
MF
MV
CNB
LD1
Ru
SW1
54321
1
1
6
7
1
1
43
2
35
3
211 133
FAN1 POWER
OUTDOOR
TIMER
WIRELESS
TRANS
VANE
L.TEST
CN2A
TWIN-1
CN2B
TWIN-2
TRANS
CND
CN30
CN2
CN70
CN6V
CN4T
CN28
CNT
DRAIN
CN50
INTAKE
CN20
PIPE
CN21
CN51
MULTIPLE
1122
SW2
SW3
ON
ON
OFF
OFF
123
1234567812345
RT1
7
W.R
TB4
6
W.B
TB2
ORN
YLW
BRN
BRN
RED RED
240V 14.5VAC
10.6VAC
230V
220V
BLU
YLW
WHT
RED
BLK
WHT
RED
POWER SUPPLY
~(1 PHASE)
AC220-240V 50Hz
AC220V 60Hz
YLW ORN
RED
7
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16
8REFRIGERANT SYSTEM DIAGRAM
INDOOR UNIT
PK-2.5
PK-3
PK-4 OUTDOOR UNIT
PU-2.5/3J series
PU-4J series
Flexible tube
Flared
connection
Strainer
Flared
connection
PK-2.5/ PK-3 Refrigerant pipe [15.88(5/8")
(with insulator) option
PK-4 Refrigerant pipe [19.05(3/4")
(with insulator) option
Refrigerant pipe [ 9.52(3/8")
(with insulator) option
Low pressure
switch
Charge
pIug Check
pIug
High pressure
switch
Outdoor heat
exchanger
Muffler
Strainer
Capillary tube for
injection Only
PU-2.5NJA1
PU-2.5VJA2PU-4TJSA2
PU-3NJA1PU-4YJSA3
Capillary
tube
Compressor
Accumulator
Ball valve
(with service port)
flow of refrigerant
PU-2.5 [O.D.3.2 I.D.1.6 L760] 2pcs
PU-3 [O.D.3.2 I.D.1.8 L800] 2pcs
PU-4 [O.D.3.2 I.D.2.0 L840] 2pcs
Capillary tube size
Ball
valve
strainer
Indoor heat
exchanger
Distributor
with
strainer
Pipe
temperature
thermistor
RT2
Indoor heat
exchanger
Distributor
with
strainer
Flexible tube
Flared
connection Flared
connection
Refrigerant pipe [15.88(5/8")
(with insulator) option
Refrigerant pipe [ 9.52(3/8")
(with heat insulator) option
Ball
valve
Low pressure
switch
Charge
pIug Check
pIug
High pressure
switch
Outdoor heat
exchanger
Capillary tube
Compressor
Accumulator
Ball valve
(with service port)
flow of refrigerant
[O.D.3.2 oI.D.1.8 oL800]
o2pcs
strainer
Pipe
temperature
thermistor
RT2
D.P.R.
(Discharge pressure regulator)
strainer
strainer
PK-2.5FLD, PK-2.5FLD1, PK-2.5FLD2/ PU-2.5VJA2, PU-2.5NJA1
PK-3FLD, PK-3FLD1, PK-3FLD2/ PU-3NJA1
PK-4FLSD, PK-4FLSD1, PK-4FLSD2/ PU-4VLJSA2, PU-4YJSA3, PU-4TJSA2
PK-3FLD, PK-3FLD1, PK-3FLD2/ PU-3VJC, PU-3YJC Unit : mm(inch)
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17
OPERATION FLOW-CHART9
START
STOP
EMERGENCY
ALL STOP
COOL OPERATION DRY OPERATION
POWER SUPPLY
Live
ON/OFF
button ON
Abnormal
operation mode
MODE SELECT
button
POWER lamp ON
Protection device
Self hold reset
Protection device
Self hold
Self-diagnostic function
Indicate & Memory
NO
NO
YES
<Note 3>
<Note 4>
NO
1
NO
YES
YES
COOL
DRY
1. Main operation
Note1. The unit starts operation by pressing the ON/OFF switch when unit is OFF.
During operation, the unit stops operation by pressing the ON/OFF switch.
In addition, operation can be turned ON/OFF with the centralized remote controller or the remote switch.
Note2. The factors which cause “abnormal operation mode” are as follows.
● Outdoor unit abnormal operation.
● Fault of room temperature thermistor(RT1).
● Fault of pipe temperature thermistor(RT2).
● Indoor coil frost protection mode.
● Fault of drain sensor(DS).
● Drain water overflow prevention mode.
Refer to page 28 for abnormal operation, mode details.
Note3. The indoor fan runs on the low speed for 1 minute to eliminate remaining heat.
Note4. The compressor will not start for 3 minutes after the stop.
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18
1
COOL operation 3 min. delay
6-minute
time delay
Compressor start
3 minutes elapse
Coil frost
protection
Range C
Compressor
start 10 minutes
elapse
Coil frost
prevention
Pipe
temperature
10°C or below
Compressor
start 16 minutes
elapse
Pipe
temperature
1°C or below
YES
YES
YES
YES YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO NO
<Note 5>
<Note 6>
<Note 7>
NO
NO
Allowance release
3-minute time delay
Coil frost
prevention release
Coil frost
prevention set
Compressor OFF
Compressor ON
Compressor
thermostat ON
Allowance release
Allowance
6-minute time delay Coil frost
protection
check mode
Continue
1 minute
Fan speed LOW
Fan speed LOW
5 minutes elapse
Outdoor unit abnormality
check mode
Allowance set
2. COOL operation
Note5. The thermostat is continuously ON during the test run.
Note6. Refer to page 20 for coil frost protection.
Note7. Range A : The pipe temperature is more than 5 degrees above room temperature.
Range B : The pipe temperature is within 5 degrees either way of room temperature.
Range C : The pipe temperature is more than 5 degrees below room temperature.
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19
Note8. When room temperature is 18°C or below, the compressor can not turn ON. When the room temperature rises to
18°C or above, the compressor will start operation after a 3-minute time delay.
Note9. Refer to page 23 for the compressor operation time.
Note10. In DRY operation, the indoor fan runs on the low speed during the compressor ON and stops during the compressor
OFF.
3. DRY operation
Dry operation
Room
temperature
18°C or below
Compressor ON
Compressor ON
3 min. elapse
Compressor
thermostat ON
Compressor ON
time completed
Compressor OFF
10-minute timer start
Compressor OFF
Fan stop
Compressor ON
3 min. delay
YES
YES
YES
YES
YES
YES
YES
YES
<Note 10> <Note 10>
<Note 5> <Note 5>
<Note 9>
<Note 8>
YES
NO
NO
NO
NO
NO
NO
NO
Compressor
thermostat ON
Compressor OFF
10 minutes completed
Compressor ON
time set
Compressor ON
Fan speed LOW
1
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20
10 MICROPROCESSOR CONTROL
TEMP
ON / OFF
NOT AVAILABLE
AM
PM
AM
PM
˚C
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.
●Room temperature thermistor.
●Pipe temperature thermistor.
Independent Control of
Outdoor Unit
OUTPUT to indoor unit
INPUT from indoor unit
INPUT to remote controller OUTPUT to remote controller
●Indication LCD lights.
12VDC
Indoor unit
●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 from outdoor unit
●Compressor motor and outdoor fan motor : ON-OFF.
OUTPUT UNIT
●Receives orders from
indoor controller.
●Emergency stop.
Non-polar, two (2) - core cable
Outdoor unit
INDOOR CONTROLLER BOARD
REMOTE CONTROLLER
●Processes and transmits orders.
PK-2.5FLD, PK-2.5FLD1
PK-3FLD, PK-3FLD1
PK-4FLSD, PK-4FLSD1
PK-2.5FLD2
PK-3FLD2
PK-4FLSD2
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