Mitsubishi Electric Mr.SLIM PKH-1.6FKA Operating manual

This manual does not cover the
following outdoor units. When ser-
vicing them, please refer to the
service manual No.OC150 and
this manual in a set.
Service Ref.]
PUH-1.6VKA3.UK
PUH-2VKA2.UK
PUH-2.5VKA2.UK
PUH-3VKA2.UK
PUH-3YKA2.UK
PUH-4YKSA2.UK
TECHNICAL & SERVICE MANUAL
SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS
CONTENTS
1. PART NAMES AND FUNCTIONS········2
2. SPECIFICATIONS·································4
3. DATA·····················································9
4. OUTLINES AND DIMENSIONS··········23
5. WIRING DIAGRAM·····························27
6. REFRIGERANT S STEM DIAGRAM ······29
7. OPERATION FLOW-CHART··············30
8. MICROPROCESSOR CONTROL·······34
9. TROUBLESHOOTING························56
10. S STEM CONTROL···························65
11. DISASSEMBL PROCEDURE···········70
12. PARTS LIST········································73
13. OPTIONAL PARTS·····························79
1999
Indoor unit
[Model names] [Service Ref.]
PKH-1.6FKA PKH-1.6FKA-E
PKH-2FKA PKH-2FKA-E
PKH-2.5FKA PKH-2.5FKA-E
PKH-3FKA PKH-3FKA-E
PKH-4FKSA PKH-4FKSA-E
INDOOR UNIT
Wall MountedSeries PKH
FILTER
CHECK MODE
TEST RUN
REMOTE CONTROLLER
No.OC190
The Slim Line.
From Mitsubishi Electric.

2
1PART 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 grill
Air outletAir outlet
Swing louvers
Air flow can be changed to horizontally
by moving the Guide vane to the left or
right.
Guide vane
● Remote controller
● Once the operation of the unit is set, subsequent operations can only be performed by pressing the ON/OFF button
repeatedly.
FILTER
CHECK MODE
TEST RUN
241
wbutton
This switches between continuous
operation and the timer operation
lbutton
The sets the ventilation fan speed.
● Operation buttons
qbutton
This sets or switches the current
time, start time and stop time.
abutton
Press this button to switch the cooler
electronic dry (dehumidify), automat-
ic and heater modes.
iTEMP. button
This sets the room temperature. The
temperature setting can be per-
formed in 1°C units.
Setting range :
Cooler 19°C to 30°C
Heater 17°C to 28°C
CHECK-TEST RUN button
Only press this button to perform an
inspection check or test operation.
Do not use it for normal operation
FILTER button
This resets the filter service indica-
tion display
jbutton
This adjusts the vertical angle of the
ventilation.
ON/OFF button
This switches between the operation
and stop modes each time it is
pressed. The lamp on this button
lights during operation.
The model name of the remote con-
troller is indicated.
PAR-JH241KA(2.5 ~ 4)
PAR-JH150KA(1.6/2)
kbutton
This switches the horizontal fan
motion ON and OFF.
(This button does not operate in this
model.)

3
Caution
●Only the display lights when the unit is stopped and power supplied to the unit.
●When power is turned ON for the first time the (CENTRAL CTRL) display appears to go off momentarily but this is not a
malfunction.
●When the central control remote control unit, which is sold separately, is used the ON-OFF button, abutton and
iTEMP button do not operate.
●“NOT AVAILABLE” is displayed when the kbutton are pressed.This indicates that this room unit is not equipped with
the fan direction adjustment function and the louver function.
FILTER
CHECK MODE
TEST RUN
241
CENTRALLY
CONTROLLED display
This indicates when the unit is con-
trolled by optional features such as
central control type remote controller.
wdisplay
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 sleep
operation starts until the heating air
is discharged.
DEFROST display
This indicates when the defrost oper-
ation is performed.
CHECK display
This indicates when a malfunction
has occurred in the unit which should
be checked.
display
FILTER
This display lights when the filter
need to be cleaned.
88°C display
This displays the selected setting
temperature.
rdisplay
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.
ldisplay
The selected fan speed is displayed.
jdisplay
This indicates the air direction.
●Display
In this display example on
the bottom left, a condition
where all display lamps light
is shown for explanation pur-
poses although this differs
from actual operation.
display
This display lights in the check mode
or when a test operation is per-
formed.
CHECK MODE
TEST RUN
88°C display
The temperature of the suction air is
displayed during operation. The dis-
play range is 8° to 39°C. The display
flashes 8°C when the actual temper-
ature is less than 8° and flashes
39°C when the actual temperature is
greater than 39°C.
Operation lamp
This lamp lights during operation,
goes off when the unit stops and
flashes when a malfunction occurs.
Display
This lamp lights when electricity is
supplied to the unit.

4
2SPECIFICATIONS
Item
Function
Capacity
Total input
Service Ref.
Power supply(phase,cycle,voltage)
Input
Running current
Starting current
External finish
Heat exchanger
Fan Fan(drive) ✕No.
Fan motor output
Airflow(Low-High)
External static pressure
Booster heater
Operation control & Thermostat
Noise level(Low-High)
Unit drain pipe O.D.
Dimensions
Weight
Service Ref.
Power supply (phase, cycle, voltage)
Input
Running current
Starting current
External finish
Refrigerant control
Compressor
Model
Motor output
Starter type
Protection devices
Heat exchanger
Fan Fan(drive)✕No.
Fan motor output
Airflow
Defrost method
Noise level
Dimensions
Weight
Refrigerant
Charge
Oil<Model>
Pipe size O.D.
Connection method
Between the indoor & outdoor unit
Service Ref.
W
D
H
W
D
H
Liquid A(in.)
Gas A(in.)
Indoor side
Outdoor side
Height difference
Piping length
INDOOR UNITOUTDOOR UNIT
REFRIGERANT PIPING
W
Btu/h
kW
kW
A
A
kW
m3/X<CFM>
Pa(mmAq)
kW
>
A(in.)
A(in.)
A(in.)
A(in.)
kg(lbs)
kW
A
A
kW
kW
m3/X<CFM>
>
A(in.)
A(in.)
A(in.)
kg(lbs)
kg(lbs)
L
PKH-1.6FKA-E
Cooling
4,500
15,350
1.51
0.07
0.32
0.40
1.44
6.74
Heating
4,650
15,900
1.48
0.07
0.32
0.40
1.41
6.60
PKH-1.6FKA-E
Single, 50Hz, 220-240V
Munsell 3.4Y 7.7/0.8(White)
Plate fin coil
Line flow(direct) ✕1
0.030
10-13(353-459)
0(direct blow)
—
Remote controller & built-in
36-43
20(13/16)
1,250(49-3/16)
200(7-7/8)
300(11-13/16)
17(37)
PUH-1.6VKA3.UK
Single, 50Hz, 220-240V
33
Munsell 5Y 7/1
Capillary tube
Hermetic
RH247VFCT
1.2
Line start
Internal thermostat, HP switch
Plate fin coil
Propeller (direct) ✕1
0.065
45(1,590)
Reverse cycle
49
870(34-1/4)
295+24(11-5/8 add 1)
650(25-5/8)
53(117)
R-22
2.2(4.9)
0.57<MS-56>
9.52(3/8)
15.88(5/8)
Flared
Flared
Max. 40m
Max. 40m
Cooling
Heating
Upper limit
Lower limit
Upper limit
Lower limit
Indoor
35:DB, 22.5: WB
21:DB, 15.5: WB
27:DB
20:DB
Outdoor
46:DB
-5:DB
21:DB, 15.5: WB
-8.5:DB, -9.5: WB
2. Guaranteed operating range
Note1. Rating Conditions (JIS B 8616)
Cooling : Indoor : 27°C (80°F) DB, 19°C (66°F) WB
Outdoor : 35°C (95°F) DB, 24°C (75°F) WB
Heating : Indoor : 20°C (68°F) DB
Outdoor : 7°C (45°F) DB, 6°C (43°F) WB

5
Item
Function
Capacity
Total input
Service Ref.
Power supply(phase,cycle,voltage)
Input
Running current
Starting current
External finish
Heat exchanger
FanFan(drive) ✕ No.
Fan motor output
Airflow(Low-High)
External static pressure
Booster heater
Operation control & Thermostat
Noise level(Low-High)
Unit drain pipe O.D.
Dimensions
Weight
Service Ref.
Power supply (phase, cycle, voltage)
Input
Running current
Starting current
External finish
Refrigerant control
Compressor
Model
Motor output
Starter type
Protection devices
Heat exchanger
FanFan(drive)✕No.
Fan motor output
Airflow
Defrost method
Noise level
Dimensions
Weight
Refrigerant
Charge
Oil<Model>
Pipe size O.D.

Connection method

Between the indoor & outdoor unit
Service Ref.
W
D
H
W
D
H
LiquidA(in.)
GasA(in.)
Indoor side
Outdoor side
Height difference
Piping length
INDOOR UNITOUTDOOR UNIT
REFRIGERANT PIPING
W
Btu/h
kW

kW
A
A

kW
m3/X<CFM>
Pa(mmAq)
kW

>
A(in.)
A(in.)
A(in.)
A(in.)
kg(lbs)

kW
A
A

kW

kW
m3/X<CFM>

>
A(in.)
A(in.)
A(in.)
kg(lbs)

kg(lbs)
L
PKH-2FKA-E
Cooling
5,500
18,800
2.27

0.07
0.32
0.40

2.20
9.86
Heating
6,250
21,300
2.29

0.07
0.32
0.40

2.22
9.95
PKH-2FKA-E
Single, 50Hz, 220-240V

Munsell 3.4Y 7.7/0.8(White)
Plate fin coil
Line flow(direct) ✕ 1
0.030
10-13(353-459)
0(direct blow)
—
Remote controller & built-in
36-43
20(13/16)
1,250(49-3/16)
200(7-7/8)
300(11-13/16)
17(37)
PUH-2VKA2.UK
Single, 50Hz, 220-240V

45
Munsell 5Y 7/1
Capillary tube
Hermetic
NH38VMDT
1.7
Line start
Internal thermostat, HP switch
Plate fin coil
Propeller (direct) ✕ 1
0.065
45(1,590)
Reverse cycle
49
870(34-1/4)
295+24(11-5/8 add 1)
650(25-5/8)
64(141)
R-22
2.2(4.9)
1.2<MS-32>
9.52(3/8)
15.88(5/8)
Flared
Flared
Max. 40m
Max. 40m
Cooling
Heating
Upper limit
Lower limit
Upper limit
Lower limit
Indoor
35: DB, 22.5: WB
21: DB, 15.5: WB
27: DB
20: DB
Outdoor
46: DB
-5: DB
21: DB, 15.5: WB
-8.5: DB, -9.5: WB
2. Guaranteed operating range
Note1. Rating Conditions (JIS B 8616)
Cooling : Indoor : 27°C (80°F) DB, 19°C (66°F) WB
Outdoor : 35°C (95°F) DB, 24°C (75°F) WB
Heating : Indoor : 20°C (68°F) DB
Outdoor : 7°C (45°F) DB, 6°C (43°F) WB