Mitsubishi Electric PKH18FK3, PKH24FK3, PKH30FK3, PKH36FK3 Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

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CUS

FILTER

CHECK MODE
TEST RUN

TIMER OFF TIMER
CHECK SET TEMP.

CLOCK AUTO AUTO
START STOP

SWING

FAN
SPEED

AUTO
RETURN

TECHNICAL & SERVICE MANUAL

No. OC273

REVISED EDITION-A

Series PKH

[Models]

PKH18FK3
PKH24FK3
PKH30FK3
PKH36FK3

Wall Mounted

Indoor unit

Revision:

●The wrong descriptions in REFRIGERANT
SYSTEM DIAGRAM have been modified.
(Page 21.)

●The wrong descriptions in WIRING DIAGRAM
have been modified.
(Page 22.)

●Restrictor valve and capillary tube have been
added to "Specifications" of heat exchanger.
(Page 58.)

●Please void OC273.

CONTENTS

1. TECHNICAL CHANGE·············································2

2. FEATURES ·······························································2

3. PART NAMES AND FUNCTIONS····························5

4. SPECIFICATIONS·····················································7

5. DATA·········································································8

6. OUTLINES AND DIMENSIONS······························19

7. REFRIGERANT SYSTEM DIAGRAM ····················21

8. WIRING DIAGRAM·················································22

9. OPERATION FLOW-CHART··································23

10. MICROPROCESSOR CONTROL···························27

11. TROUBLESHOOTING············································44

12. SYSTEM CONTROL···············································50

13. DISASSEMBLY PROCEDURE·······························55

14. PARTS LIST····························································58

15. OPTIONAL PARTS·················································61

Remote controller

1

FILTER

CHECK MODE
TEST RUN

TIMER OFF TIMER
CHECK SET TEMP.

CLOCK AUTO AUTO
START STOP

SWING

FAN
SPEED

AUTO
RETURN

TECHNICAL CHANGE

PKH18FK2 ➔ PKH18FK3

PKH24FK
PKH30FK
PKH36FK

● INDOOR CONTROLLER BOARD has changed.

1) From TRANSFORMER to POWER BOARD.

2) From JUMPER CONNECTOR (J1) to DIP SWITCH (SW1).

3) From JUMPER CONNECTOR (J5) to DIP SWITCH (SW5).

4) The number of switches of SW7 changed from 4 to 3 pieces.

5) SW8 for option and SW9 for model selector are added.

2 ➔ PKH24FK3
2 ➔ PKH30FK3
2 ➔ PKH36FK3

2

FEATURES

Indoor unit

Remote controller

Models Cooling capacity / Heating capacity SEER

PKH18FK3 18,000 / 18,600 [25,100] Btu/h 11.1
PKH24FK3 24,000 / 25,000 [31,500] Btu/h 10.2
PKH30FK3 30,000 / 33,000 [40,500] Btu/h 10.6
PKH36FK3 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. For the PKH-FK3, 14.5in of wall space between the ceiling and the window allows “above window”
installation.

2. AUTO FLAP SHUTTER

With a simple flick of the OFF switch the air outlet will 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.

3. INSTALLATION : FAST AND ENDLESSLY ADAPTABLE

(1) Multi-directional piping

Multi directional drain and refrigerant piping radically improves flexibility in selecting installation layouts.
PKH-FK3 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

The presence of thumbscrews on the filters means that the filters can be quickly and smoothly removed.

2

4. ADVANCED MICROPROCESSOR

Indoor unit Outdoor unit

Indoor
heat
exchanger

4•way
valve

Accumulator

Compressor

Outdoor
heat
exchanger

Capillary tubes
for heating

Capillary
tubes for
cooling

Liquid section
of piping

High-pressure
liquid
refrigerant

Restrictor

valve

Restrictor valve

Indoor unit Outdoor unit

Indoor
heat
exchanger

4•way
valve

Accumulator

Compressor

Outdoor
heat
exchanger

Capillary tubes
for cooling

Capillary
tubes for
heating

Liquid section
of piping

Low-pressure
two-phase
refrigerant

Restrictor

valve

Restrictor valve

TIMER OFF TIMER
CHECK SET TEMP.

DRY COOL
AUTO
HEAT

CLOCK AUTO AUTO
START STOP

MODE TIMER ON/OFF CLOCK/TIMER FAN SPEED AIR DISCHARGE FILTER

CHECK

TEST RUN

AIR SWEEP

SET TEMP. TIMER SET

F

FAN
SPEED

SWING

AUTO

RETURN

REMOTE CONTROLLER

[Remote controller]

(1) Easy to Use Microprocessor

1) Ultra-Thin Remote Controller

The streamlined, wide controller is designed to
blend with any kind of interior and the adoption of
a sophisticated microprocessor allows you to
carry out a wide range of operations easily.

2) Attractive Liquid Crystal Display (LCD)

Units operation mode, set temperature, room tem-
perature, timer setting, fan speed,
and air flow direction are displayed on the
remote controller with the easily understood visual
Liquid Crystal Display (LCD).

3) Convenient 24-Hour ON-OFF Timer

The timer allows Mr.SLIM to be switched on or
off automatically at the time is shown on the LCD.

4) Self-Diagnostic Feature Indicates Instantly

In the rare case when a problem occurs, the unit stops operating and the set temperature indicator changes to the
self-diagnostic indicator, indicating the location of the fault.
If the check switch is pressed twice, the unit stops operating and the check mode is initiated. The cause of the most
recent problem stored in the memory is displayed on the LCD. This is extremely useful for maintenance purposes.

5) Useful Memory Feature for Storing Instructions

The previous set value is memorised so that constant temperature control can be obtained. This is convenient when,
for example, a power failure occurs.

(2) Non-polar Two-Wire Remote Controller Cables

The non-polar, two-wire type remote controller cable is slim, installation is simple and trouble-free. Remote controller
wire can be extended up to 550 yards.

(3) Automatic Cooling / Heating Changeover Operation

An automatic cooling and heating changeover operation system is provided to ensure easy control and year-round air
conditioning.
Once the desired temperature is set, unit operation is switched automatically between cooling and heating, in
accordance with the room temperatures as low as 75

o

F.

5. READY-CHARGED REFRIGERANT SYSTEM
PRE-CHARGE REFRIGERANT REQUIRED FOR LINE LENGTH OF 100ft AT
SHIPMENT. PREVENTING TROUBLES DUE TO SHORTAGE OF REFRIGERANT.

The unique refrigerant circuit and a large accumulator always controls the refrigerant to its optimum condition regardless of
the length of 164ft maximum. The additional refrigerant charging work at the field which often caused uncertain problems
heretofore is completely eliminated. This unique system serves to improve the quality of work and reliability, and also helps
to speed up the installation work.

(Figure1)

With normal circulation systems, a high-pressure refrigerant, condensed for cooling by the outdoor heat exchanger, is
reduced in pressure by capillary tubes in the indoor unit after passing through the restrictor valve in the outdoor unit (see

Figure 1). With the new circulation system, the direction of the restrictor valve is reversed as shown in Figure 2, and the
condensed high pressure refrigerant is reduced in pressure by the capillary tubes in the outdoor unit. This results in a “two­phase refrigerant” of reduced pressure in the liquid section of the piping. The density of this two-phase refrigerant is 1/3~
1/2 of that of the high pressure liquid refrigerant, and thus is required in smaller amounts (see Figures 1 and 2). As a result,
the length of the piping can be extended further, and the effects of height differences are reduced. These new circulation
system are also equipped with a large accumulator which allows the refrigerant required for the 100ft piping length to be
enclosed in the outdoor unit. The result is an air conditioner that requires no charging unless piping is extended beyond
100ft.

(Figure2)

3

6. HIGH RELIABILITY AND EASY SERVICING

Rear

Right

Base

Front

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.

7. FOUR-WAY PIPING ACCESS MAKES
INSTALLATION LAYOUT EASY

Piping on the outdoor unit may be connected from either of
four directions: front, rear, side or beneath the base.
This easy-access design makes it possible to install a
number of units in a compact arrangement at a single site.
The outdoor unit allows for unheard-of flexibility in
determining a piping layout, thus greatly simplifying
installation.

8. FRONT-ACCESS FACILITATES
MAINTENANCE

The outdoor unit has been designed with a front access
service panel that allows easy access to all maintenance
point, regardless of the installation layout. What’s more, this
front panel may be removed by loosening only two screws.
It all adds up to greatly simplified maintenance work.

9. NITROGEN GAS IS CHARGED TO
INDOOR UNIT

Indoor unit and refrigerant pipes are charged with nitrogen
gas (N2) instead of R-22 before shipment from the
factory.

4

PART NAMES AND FUNCTIONS3

TIMER OFF TIMER
CHECK SET TEMP.

DRY COOL
AUTO
HEAT

CLOCK AUTO AUTO
START STOP

MODE TIMER ON/OFF CLOCK/TIMER FAN SPEED AIR DISCHARGE FILTER

CHECK

TEST RUN

AIR SWEEP

SET TEMP. TIMER SET

F

FAN
SPEED

SWING

AUTO

RETURN

REMOTE CONTROLLER

Remote controller

Settings remain in effect until changed.
Air conditioner can be operated by simply pushing ON/OFF button once settings have been made.

Remote controller operation buttons

TIMER ON/OFF button

This switches between continuous
operation and the timer operation.

OPERATION MODE
button

Press this button to switch the cool­ing,electronic dry (Dehumidify),auto­matic and heating modes.

SET TEMPERATURE
button

This sets the room temperature.
The temperature setting can be per­formed in 2˚F units.

Setting range :

Cooling 65˚F to 87˚F
Heating 61˚F to 83˚F

CLOCK/TIMER button

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

FAN SPEED button

This sets the ventilation fan speed.

ON/OFF button

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

AIR DISCHARGE
button

This adjusts the vertical angle of the
ventilation.

FILTER button

This resets the filter service indica­tion display.

AIR SWEEP button

This switches the horizontal fan
motion ON and OFF.

(This button is not available)

CHECK-TEST RUN button

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

5

Remote controller display

CENTRALLY
CONTROLLED display

This indicates when the unit is con-

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

TIMER display

This indicates when the continuous

operation and time operation modes
are set.

It also display the time for the timer

operation at the same time as when
it is set.

OPERATION MODE display

This indicates the operation mode.

STANDBY display

This indicates when the standby

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

CLOCK display

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

TIMER OFF TIMER

DRY COOL
AUTO
HEAT

MODE TIMER ON/OFF CLOCK/TIMER FAN SPEED AIR DISCHARGE FILTER

REMOTE CONTROLLER

CLOCK AUTO AUTO

CHECK SET TEMP.

START STOP

SET TEMP. TIMER SET

FAN
SPEED

SWING

RETURN

In this display example on the bottom left, a condi­tion where all display lamps light is shown for
explanation purposes although this differs from
actual operation.

AIR DISCHARGE display

This displays the air direction.

FAN SPEED display

The selected fan speed is displayed.

AUTO

F

AIR SWEEP

CHECK

TEST RUN

The temperature of the return air is
displayed during operation. The dis­play range is 47° to 97°F. The dis­play flashes 47°F when the actual
temperature is less than 47° and
flashes 97°F when the actual tem­perature is greater than 97°F.

Operation lamp

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

display

DEFROST display

This indicates when the defrost oper-

ation is performed.

CHECK display

This indicates when a malfunction

has occurred in the unit which should
be checked.

display

This displays the selected setting
temperature.

display

This lamp lights when electricity is
supplied to the unit.

CHECK MODE

TEST RUN

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

FILTER

This lamp lights when the filter needs
to be cleaned.

display

display

Caution

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

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

●When the central control remote control unit, which is sold separately, is used the ON-OFF button,OPERA TION MODE button and SET

TEMP button do not operate.

● “NOTAVAILABLE” is displayed when the AIR SWEEPbutton are pressed.
(AIR SWEEP function is not provided for PKH series.)

6

SPECIFICATIONS4

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

PKH18FK3

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

PKH18FK3

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

PKH24FK3

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

PKH24FK3

Munsell 3.4Y 7.7/0.8

208/230,1,60

57

PUH24EK

1

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

PKH30FK3

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

PKH30FK3

49-44

66

PUH30EK

1

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

164
164

PKH36FK3

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

PKH36FK3

50-46

66

PUH36EK

1

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

Item

34-1/4
11-5/8

3/8
5/8

55-1/8 66-5/32

NOTES : *1.Rating conditions (cooling)-indoor : DB 80˚F, WB 67˚F outdoor : DB 95˚F, WB 75˚F.
(heating)-indoor : DB 70˚F, WB 60˚F outdoor : DB 47˚F, WB 43˚F.
*2.Rating conditions (heating)-indoor : DB 70˚F, WB 60˚F outdoor : DB 17˚F, WB 15˚F.
*3.Heating capacity and power consumption in [ ] includes heater operation at 208/230V.

Operating range

Indoor intake air temperature

DB 95˚F, WB 71˚F
DB 67˚F, WB 57˚F
DB 80˚F, WB 67˚F
DB 70˚F, WB 60˚F

Outdoor intake air temperature

DB 115˚F

DB 0˚F *

DB 75˚F, WB 65˚F

DB 17˚F, WB15˚F

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 DB 23˚F.)

MODELS : PKH18FK3, PKH24FK3, PKH30FK3, PKH36FK3

7

5

Models

Models Outdoor intake air DB temperature(˚F

)

PKH18FK3

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

PKH24FK3

710

0.16

PKH30FK3

990

0.15

PKH36FK3

990

0.14

Notes 1. B.F. : Bypass Factor, IWB : Intake air wet-bulb temperature
TC : Total Capacity (x10

3

Btu/h), SHC : Sensible Heat Capacity (x10

3

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

PKH18FK3
PKH24FK3
PKH30FK3

PKH36FK3

DATA

MODELS : PKH18FK3, PKH24FK3, PKH30FK3, PKH36FK3

1. PERFORMANCE DATA

1) COOLING CAPACITY

8

2) HEATING CAPACITY

Models Outdoor intake air WB temperature(˚F

Models

Airflow

(CFM)

IWB

(˚F)

75

15 25 35 45 55 65

CA

PC

CA

PC

CA

PC

CA

PC

CA

PC

12.1

1.20

14.1

1.34

16.3

1.49

18.7

1.65

21.4

1.83

)

CA

23.7

Auxiliary heater

PC

1.99

CA

5.5

208V
230V

PC

1.6

PKH18FK3

PKH24FK3

PKH30FK3

PKH36FK3

Notes 1. IDB : Intake air dry-bulb temperature
CA : Capacity (x10

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.

710

710

990

990

70

12.4

1.16

14.4

1.29

65

12.7

1.11

14.7

1.24

75

16.3

1.82

18.9

2.03

70

16.6

1.76

19.4

1.96

65

17.0

1.69

19.8

1.89

75

21.5

2.32

25.0

2.59

70

21.9

2.24

25.5

2.50

65

22.5

2.15

26.1

2.40

75

24.7

2.71

28.7

3.04

70

25.3

2.62

29.4

2.93

65

25.9

2.53

30.1

2.82

3

Btu/h), PC : Power Consumption (kW)

16.7

17.0

21.9

22.4

22.9

28.9

29.6

30.2

33.3

34.1

34.8

1.44

1.38

2.27

2.19

2.10

2.89

2.78

2.68

3.39

3.26

3.14

19.1

19.5

25.2

25.7

26.2

33.2

33.9

34.6

38.2

39.0

39.9

1.59

1.53

2.51

2.42

2.32

3.20

3.08

2.96

3.75

3.61

3.47

21.8

22.2

28.8

29.3

29.9

38.0

38.6

39.4

43.7

44.5

45.4

1.76

1.69

2.77

2.67

2.56

3.53

3.40

3.26

4.14

3.98

3.83

24.1

24.5

32.8

33.3

33.9

43.2

43.7

44.6

49.6

50.4

51.3

1.91

1.83

3.01

2.90

2.78

3.86

3.72

3.56

4.49

4.28

4.14

6.5

5.5

6.5

6.1

7.5

6.1

7.5

1.9

1.6

1.9

1.8

2.2

1.8

2.2

Models

PKH18FK3
PKH24FK3

PKH30FK3

PKH36FK3

Refrigerant piping length (one way)

Less than 100ft

1.00

1.00

1.00

1.00

100~130ft

0.995

0.995

0.995

0.995

130~164ft

0.990

0.990

0.990

0.990

9

2. PERFORMANCE CURVE

Does not include booster heater (1.9kW)

Total power consumption (kW) Total capacity (x10

3

Btu/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 (x10

3

Btu/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 32 35

45 55

65

(67)

75 85 95 105 115

Indoor intake air WB temperature ( F)

Indoor intake air WB temperature ( F)

NOTES : Apoint on the curve shows the reference point.

<PKH18FK3>

COOLING CAPACITY HEATING CAPACITY

<PKH24FK3>

36

Btu/h)

3

30

24

18

12

3.0

2.5

2.0

1.5

Total power consumption (kW) Total capacity (x10

023 32 35

COOLING CAPACITY HEATING CAPACITY

SHF=0.71

71
67

Indoor intake air WB temperature ( F)

63

71
67
63

Indoor intake air WB temperature ( F)

45 55

Outdoor intake air DB temperature ( F)

(67)

65

75 85 95 105 115

35

Indoor intake air DB temperature ( F)

Btu/h)

3

30

24

18

12

3.0

2.5

2.0

1.5

Total power consumption (kW) Total capacity (x10

15 25 35 45 55 65

Does not include booster heater (1.9kW)

Indoor intake air DB temperature ( F)

Outdoor intake air WB temperature ( F)

10

65
70
75

75
70
65

NOTES : Apoint on the curve shows the reference point.

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

1.5
15 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

2.0
15 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)

<PKH30FK3>

COOLING CAPACITY HEATING CAPACITY

<PKH36FK3>

COOLING CAPACITY HEATING CAPACITY

11

3. CONDENSING PRESSURE AND SUCTION PRESSURE

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)

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.

<PKH18FK3>

COOLING MODE

Data is based on the condition under outdoor humidity 75%.
A point on the curve shows the reference point.

HEATING MODE

12

Data is based on the condition under indoor humidity 50%.

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)

Air flow should be set at HI.
A point on the curve shows the reference point.

<PKH24FK3>

COOLING MODE

Data is based on the condition under outdoor humidity 75%.
A point on the curve shows the reference point.

HEATING MODE

13

Data is based on the condition under indoor humidity 50%.

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)

Air flow should be set at HI.
A point on the curve shows the reference point.

<PKH30FK3>

COOLING MODE

Data is based on the condition under outdoor humidity 75%.
A point on the curve shows the reference point.

HEATING MODE

14

Data is based on the condition under indoor humidity 50%.

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)

Air flow should be set at HI.
A point on the curve shows the reference point.

<PKH36FK3>

COOLING MODE

Data is based on the condition under outdoor humidity 75%.
A point on the curve shows the reference point.

HEATING MODE

15

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

PKH18FK3

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

PKH24FK3

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

PKH30FK3

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

PKH36FK3

Intake
air temperature

Discharge
air temperature

Intake
air temperature

Capacity
SHF

DB

WB

DB

WB

DB

WB

16

5. OPERATING RANGE

1) POWER SUPPLY

1 Phase 60Hz 208/230V
Guaranteed voltage range

2) OPERATION

Min. Max.
198V 208V 230V 253V

Function

Cooling

Heating

Air intake temperature

Condition

Standard temperature
Maximum temperature
Minimum temperature
Maximum humidity
Standard temperature
Maximum temperature
Minimum temperature

DB(˚F

80
95
67
80
70
80
70

Indoor

)

WB(˚F

6. OUTLET AIR SPEED AND COVERAGE RANGE

Model

PKH18FK3

PKH24FK3

Airflow

(

CFM

710
710

)

Air speed

(

)

ft/sec

16.1

16.1

Coverage

range(ft

41
41

)

Outdoor

)

67
71
57
75
60
67
60

* With wind baffle DB 23°F if on wind baffle.

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.

DB(˚F

95

115

*0
80
47
75
17

)

WB(˚F

75
—
—
75
43
65
15

)

PKH30FK3
PKH36FK3

990
990

17.7

17.7

50
50

7. ADDITIONAL REFRIGERANT CHARGE (R22(oz))

Refrigerant piping length (one way)

55ft

70ft

85ft

100ft

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Model

PKH18FK3
PKH24FK3
PKH30FK3
PKH36FK3

Outdoor unit

precharged

(

up to 100ft

5 lbs 8 oz
9 lbs 15 oz
10 lbs 2 oz
10 lbs 9 oz

)

25ft

40ft

0

0

0

0

0

0

0

0

17

115ft

2
2
5
5

130ft

4

4
10
10

150ft

7
16
16

164ft

9
20
20

8. 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)44LINE

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)41LINE

Wall

Unit

3.3ft

3.3ft

PKH18FK3
PKH24FK3

Ambient temperature 80˚F
Test conditions are based on JIS Z8731

PKH30FK3
PKH36FK3

18

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

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

Terminal block for remote controller

(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-{1/4Hole 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

OUTLINES AND DIMENSIONS

Indoor Unit
PKH18FK3
PKH24FK3

Unit : inch

19

PKH30FK3
PKH36FK3

2-15/32

1/2

9-1/4

Right side

for right piping

Knock out hole

7-3/4

C

19/32

or less

2

Bolt

Drain hose O.D.1-1/16(or 7/8)

4-3/8

4-1/32

1

2-9/32

Liquid pipe 1/2F

1-21/32

2-5/32(Gas pipe)

9-7/16

4-23/32(Liquid pipe)

3/4F

Gas pipe

2

Through hole

on the market.

3-1/2 3-1/2~ 4

Sleeve >< 1

>< 1 Sleeves are available

B

Unit : inch

9-1/4

7-7/32

1-25/32

1

9-1/4

1-25/32

Front

Top

9-1/4

66-5/32

53-15/16 Air Intake

Terminal block for control

1-25/32

Terminal block for power supply

Lower side

55-1/8

Drain hose

louvers(manual)

left-hand piping)

Under panel (Removable at

Auto vanes

Knock out hole for under-piping

Refrigerant pipe .Drain pipe

Terminal block for remote controller

9-1/4

43-11/16 (Drain hose)

1-25/32

27-5/16 Air outlet 27-5/16 Air outlet

9-1/4

11-1/32

1-5/32

2-3/8

3-5/32
1-3/16

7-1/4 13/32

1-3/16

7-17/32

12-3/8

29-17/32

12- 1/4 hole

for tapping screwRear piping hole

Air

intake

or more
1-3/16

Air

outlet

5-/15/16 or less

Left side

10 or more

1-3/16

13-3/8

9-21/32

23-7/16

3/4

3-19/32

Knock out hole

for left piping

3-15/16

A

5/32

31/32

Drainage range on

right-hand side

Drain hose for

left-hand side piping

1-17/32

C

1-3/161-3/16

Front

Knock out hole for wiring

A

2 or more 10 or more

B

1-15/32

1-15/32

1-17/32
3-15/16

2-29/32

2-29/32

5/32

2-9/16

1-17/32

1-15/32

2-9/163-27/32

20

50

Unit center

Wall fixture

Unit out line

Drainage range on

Left hand side

35-7/16

13x3-19/32=(7-3/16) 11-7/32

84-{1/4 hole

23/32

23/32

for tapping

screw

9-7/16 7-3/328-27/32 11-1/32

Range for left

11-5/8

41- 15/32 hole

rear piping hole

Range for left rear piping hole

for bolt