Mitsubishi Electric PKFY-P32VHM-E Operating manual

TECHNICAL & SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES.........................2
2. SAFETY PRECAUTION..........................2
3. PART NAMES AND FUNCTIONS..........6
4. SPECIFICATION.....................................8
5. OUTLINES AND DIMENSIONS............11
6. WIRING DIAGRAM...............................12
7. REFRIGERANT SYSTEM DIAGRAM........13
8. TROUBLESHOOTING..........................13
9. DISASSEMBLY PROCEDURE.............21
Indoor unit
[Model names] [Service Ref.]
PKFY-P32VHM-E PKFY-P32VHM-E
PKFY-P32VHM-ER1
PKFY-P40VHM-E PKFY-P40VHM-E
PKFY-P40VHM-ER1
PKFY-P50VHM-E PKFY-P50VHM-E
PKFY-P50VHM-ER1
No. OCH442
REVISED EDITION-A
INDOOR UNIT
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
R407C R22R410A
Note:
•This manual describes
only service data of the
indoor units.
•RoHS compliant products
have <G> mark on the
spec name plate.
February 2009
PARTS CATALOG (OCB442)
Revision:
•PKFY-P32/40/50VHM-ER1
are added in REVISED
EDITION-A.
•Some descriptions have
been modified.
•Plase void OCH442.

2
2SAFETY PRECAUTION
[1] Cautions for service
· After recovering all the refrigerant in the unit, proceed to working.
· Do not release refrigerant in the air.
· After completing the repair service, recharge the cycle with the specified amount of liquid refrigerant.
Cautions for units utilizing refrigerant R407C
CAUTIONS RELATED TO NEW REFRIGERANT
Do not use the existing refrigerant piping.
The old refrigerant and lubricant in the existing piping
contain a large amount of chlorine which may cause the
lubricant deterioration of the new unit.
Use “low residual oil piping”
If there is a large amount of residual oil (hydraulic oil, etc.)
inside the piping and joints, deterioration of the lubricant
will result.
Use ESTR , ETHER or HAB as the lubricant to
coat flares and flange connection parts.
If large amount of mineral oil enters, that can cause
deterioration of refrigerant oil etc.
Use liquid refrigerant to charge the system.
If gas refrigerant is used to seal the system, the composition
of the refrigerant in the cylinder will change and performance
may drop.
Do not use a refrigerant other than R407C.
If another refrigerant (R22, etc.) is used, the chlorine in the
refrigerant may cause the lubricant deterioration.
Use a vacuum pump with a reverse flow check valve.
The vacuum pump oil may flow back into the refrigerant
cycle and cause the lubricant deterioration.
Store the piping to be used indoors during
installation and both ends sealed until just
before brazing.
(Store elbows and other joints in a plastic bag.)
If dust, dirt, or water enters the refrigerant cycle,
deterioration of the oil and compressor trouble may result. Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
1TECHNICAL CHANGES
PKFY-P32VHM-E PKFY-P32VHM-ER1
PKFY-P40VHM-E PKFY-P40VHM-ER1
PKFY-P50VHM-E PKFY-P50VHM-ER1
1. INDOOR CONTROLLER BOARD (I.B.) has been changed. (S/W version up)
2. Fan speed has been changed. (4 speed →3 speed)
3. Heat exchanger has been changed.
PKFY-P32VHM-E
PKFY-P40VHM-E
PKFY-P50VHM-E
Service parts of room temp. thermistor (TH21) has been changed. (T7W E05 202 →R01 N20 202)
(The position to be attached has been changed. Band/PVC tube have been added.)

33
[3] Service tools
Use the below service tools as exclusive tools for R407C refrigerant.
[2] Refrigerant recharging
(1) Refrigerant recharging process
1Direct charging from the cylinder.
·R407C cylinder available on the market has a syphon pipe.
·Leave the syphon pipe cylinder standing and recharge it.
(By liquid refrigerant)
(2) Recharge in refrigerant leakage case
·After recovering the all refrigerant in the unit, proceed to working.
·Do not release the refrigerant in the air.
·After completing the repair service, recharge the cycle with the specified amount of
liquid refrigerant.
Gravimeter
Unit
No. Tool name Specifications
Gauge manifold ·Only for R407C
·Use the existing fitting SPECIFICATIONS. (UNF7/16)
·Use high-tension side pressure of 3.43MPa·G or over.
Charge hose ·Only for R407C
·Use pressure performance of 5.10MPa·G or over.
—
Electronic scale
Gas leak detector ·Use the detector for R134a or R407C.
Adapter for reverse flow check ·Attach to vacuum pump.
—
—
Refrigerant charge base
Refrigerant cylinder ·For R407C ·Top of cylinder (Brown)
·Cylinder with syphon
Refrigerant recovery equipment

4
Cautions for units utilizing refrigerant R410A
Store the piping to be used indoors during
installation and both ends of the piping sealed
until just before brazing. (Leave elbow joints, etc.
in their packaging.)
Use ester oil, ether oil or alkylbenzene oil (small
amount) as the refrigerant oil applied to flares
and flange connections.
Charge refrigerant from liquid phase of gas
cylinder.
If the refrigerant is charged from gas phase, composition
change may occur in refrigerant and the efficiency will be
lowered.
Do not use refrigerant other than R410A.
If other refrigerant (R22 etc.) is used, chlorine in refrige-
rant can cause deterioration of refrigerant oil etc.
Use a vacuum pump with a reverse flow check
valve.
Vacuum pump oil may flow back into refrigerant cycle and
that can cause deterioration of refrigerant oil etc.
Use the following tools specifically designed for
use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant.
Handle tools with care.
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigera-
nt will change and the efficiency will be lowered.
Flare tool
Electronic refrigerant
charging scale
Vacuum pump adaptor
Size adjustment gauge
Gauge manifold
Torque wrench
Gas leak detector
Charge hose
Tools for R410A
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
If large amount of mineral oil enters, that can cause deterio-
ration of refrigerant oil etc.
Do not use the existing refrigerant piping.
The old refrigerant and lubricant in the existing piping
contains a large amount of chlorine which may cause the
lubricant deterioration of the new unit.
Use “low residual oil piping”
If there is a large amount of residual oil (hydraulic oil, etc.)
inside the piping and joints, deterioration of the lubricant
will result.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.

5
[1] Cautions for service
(1) Perform service after recovering the refrigerant left in unit completely.
(2) Do not release refrigerant in the air.
(3) After completing service, charge the cycle with specified amount of refrigerant.
(4) When performing service, install a filter drier simultaneously.
Be sure to use a filter drier for new refrigerant.
[2] Additional refrigerant charge
When charging directly from cylinder
· Check that cylinder for R410A on the market is syphon type.
· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
Gravimeter
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Tool name Specifications
1Gauge manifold ·Only for R410A
·Use the existing fitting specifications. (UNF1/2)
·Use high-tension side pressure of 5.3MPa·G or over.
2Charge hose ·Only for R410A
·Use pressure performance of 5.09MPa·G or over.
3Electronic scale
4Gas leak detector ·Use the detector for R134a, R407C or R410A.
5Adaptor for reverse flow check ·Attach to vacuum pump.
6Refrigerant charge base
7Refrigerant cylinder ·Only for R410A ·Top of cylinder (Pink)
·Cylinder with syphon
8Refrigerant recovery equipment

6
3PART NAMES AND FUNCTIONS
Indoor unit
Filter Air intake
Louver Air outlet Vane
Wireless remote controller
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
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
Changes left/right airflow direction.
(Not available for this model.)
MODE SELECT button
Used to switch the operation mode between
cooling, drying, fan, heating and auto mode.
CHECK-TEST RUN button
Only press this button to perform an
inspection 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.
+In case the outdoor unit is cool only type,
the heating and auto mode are not
available.
Buttons used to set the “hour and minute” of
the current time and timer settings.
h and min buttons
display
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
display
CHECK and TEST RUN display indicate that
the unit is being checked or test-run.
display
OPERATION MODE display
Operation mode display indicates which
operation mode is in effect.
TIMER CONTROL buttons
AUTO STOP (OFF timer): when this switch is
set, the air conditioner will be automatically
stopped at the preset time.
AUTO START (ON timer): when this switch is
set, the air conditioner will be automatically
started at the preset time.
MODEL SELECT
CHECK TEST RUN
SET TEMP. display indicates the set desired
temperature.
Lights up while the signal is transmitted to
the indoor unit when the button is pressed.

77
°F°C
°F°C
ERROR CODE
AFTER
TIMER
TIME SUN MON TUE WED THU FRI SAT
ON
OFF
Hr
AFTER
FILTER
FUNCTION
ONLY1Hr.
WEEKLY
SIMPLE
AUTO OFF
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
●
●
Display Section
For purposes of this explanation,
all parts of the display are shown
as lit. During actual operation, only
the relevant items will be lit.
Identifies the current operation
Shows the operating mode, etc.
*Multilanguage display is available.
“Centrally Controlled” indicator
Indicates that operation from the
remote controller has been prohib-
ited by a master controller.
“Timer is Off” indicator
Indicates that the timer is off.
Temperature Setting
Shows the target temperature.
Day-of-Week
Shows the current day of the week.
Time/Timer Display
Shows the current time, unless the simple or Auto Off
timer is set.
If the simple or Auto Off timer is set, the time to be
switched off is shown.
“Sensor” indication
Displayed when the remote controller
sensor is used.
“Locked” indicator
Indicates that remote controller but-
tons have been locked.
“Clean The Filter” indicator
To be displayed on when it is time to
clean the filter.
Timer indicators
The indicator comes on if the corre-
sponding timer is set.
Up/Down Air Direction indica-
tor
The indicator shows the direc-
tion of the outcoming airflow.
“One Hour Only” indicator
Room Temperature display
Shows the room temperature. The room
temperature display range is 8–39.
The display blinks if the temperature
is less than 8or 39or more.
Louver display
Indicates the action of the swing louver.
Does not appear if the louver is not
running.
(Power On indicator)
Indicates that the power is on.
Fan Speed indicator
Shows the selected fan speed.
Ventilation indicator
Appears when the unit is running in
Ventilation mode.
Operation Section
Temperature setting buttons
Down
Up
Timer Menu button
(Monitor/Set button)
Mode button (Return button)
Set Time buttons
Back
Ahead
Timer On/Off button
(Set Day button)
Opening the
lid
ON/OFF button
Fan Speed button
Filter button
(<Enter> button)
Test Run button
Check button (Clear button)
Airflow Up/Down button
Louver button
( Operation button)
To return operation
number
Ventilation button
( Operation button)
To go to next operation
number
Note:
“PLEASE WAIT” message
This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure.
“NOT AVAILABLE” message
This message is displayed if an invalid button is pressed (to operate a function that the indoor unit does not have).
If a single remote controller is used to operate multiple indoor units simultaneously that are different types, this message will not be displayed as
far as any of the indoor units is equipped with the function.
Built-in temperature sensor
Displayed if the airflow is set to
Low or downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off in one hour,
at which time the airflow direction
also changes.
Wired remote controller

8
4.5
3,900
15,400
4,000
0.03
0.30
5.0
4,300
17,100
0.03
0.30
*1 Nominal cooling conditions
Note :
Indoor :
Outdoor :
Pipe length :
Level difference :
27°CDB/19°CWB (81°FDB/66°FWB)
35°CDB (95°FDB)
7.5 m (24-9/16 ft)
0m (0 ft)
*2 Nominal cooling conditions
27°CDB/19.5°CWB (81°FDB/67°FWB)
35°CDB (95°FDB)
5m (16-3/8 ft)
0m (0 ft)
*3 Nominal heating conditions Unit converter
20°CDB (68°FDB)
7°CDB/6°CWB (45°FDB/43°FWB)
7.5 m (24-9/16 ft)
0 m (0 ft)
* Due to continuing improvement, above specification may be subject to change without notice.
* Nominal conditions *1, *3 are subject to JIS B8615-1.
kcal/h = kW × 860
Btu/h = kW × 3,412
cfm = m
3
/min × 35.31
lb = kg/0.4536
*Above specification data is
subject to rounding variation.
Service Ref.
Power source
Cooling capacity
(Nominal)
Heating capacity
(Nominal )
External finish
External dimension H × W × D
Net weight
Heat exchanger
Fan
Noise level (Low-Mid2-Mid1-High)
(measured in anechoic room)
Insulation material
Air filter
Protection device
Refrigerant control device
Connectable outdoor unit
Diameter of
refrigerant pipe
Field drain pipe size
Standard
attachment
Remarks
Power input
Current input
Power input
Current input
Type × Quantity
External
static press.
Motor type
Motor output
Driving mechanism
Airflow rate
(Low-Mid2-Mid1-High)
Liquid
Gas
Document
Accessory
Optional parts
Installation
kW
kcal/h
Btu/h
kcal/h
kW
A
kW
kcal/h
Btu/h
kW
A
mm
in.
kg (lb)
Pa
mmH2O
kW
m3/min
L/s
cfm
dB <A>
mm (in.)
mm (in.)
mm (in.)
*1
*1
*1
*2
*3
*3
*3
(R410A)
(R22, R407C)
(R410A)
(R22, R407C)
Installation Manual, Instruction Book
—
1-phase 220-240V 50Hz, 1-phase 220V 60Hz
Cross fin (Aluminum fin and copper tube)
DC motor
Direct-drive
Polyethylene sheet
PP honeycomb
Fuse
LEV
R410A, R407C, R22 CITY MULTI
PKFY-P32VHM-E
Plastic, MUNSELL (1.0Y 9.2/0.2)
3.6
3,100
12,300
3,150
0.03
0.30
4.0
3,400
13,600
0.03
0.30
295 × 898 × 249
11-5/8" × 35-3/8" × 9-13/16"
13 (29)
Line flow fan × 1
0
0
0.030
PKFY-P40VHM-E
9 - 10 - 11 - 12
150 - 167 - 183 - 200
318 - 353 - 388 - 424
34 - 37 - 40 - 43
I.D. 16mm (5/8")
ø6.35 (ø1/4")
ø6.35 (ø1/4")
ø12.7 (ø1/2")
ø12.7 (ø1/2")
Flare
Flare
Flare
Flare
ø6.35 (ø1/4")
ø6.35 (ø1/4")
ø12.7 (ø1/2")
ø12.7 (ø1/2")
Flare
Flare
Flare
Flare
PKFY-P50VHM-E
5.6
4,800
19,100
5,000
0.03
0.30
6.3
5,400
21,500
0.03
0.30
8 - 9.5 - 10.5 - 11.5
133 - 158 - 175 - 192
283 - 335 - 371 - 406
33 - 36 - 38 - 41
ø6.35 (ø1/4")
ø9.52 (ø3/8")
ø12.7 (ø1/2")
ø15.88 (ø5/8")
Flare
Flare
Flare
Flare
—
—Flare nut 3/8F, 5/8F
Details on foundation work, insulation work, electrical wiring, power source switch, and other items shall be referred to the
Installation Manual.
4SPECIFICATION
4-1. Specifications

99
4.5
3,900
15,400
4,000
0.04
0.40
5.0
4,300
17,100
0.03
0.30
*1 Nominal cooling conditions
Note :
Indoor :
Outdoor :
Pipe length :
Level difference :
27°CDB/19°CWB (81°FDB/66°FWB)
35°CDB (95°FDB)
7.5 m (24-9/16 ft)
0m (0 ft)
*2 Nominal cooling conditions
27°CDB/19.5°CWB (81°FDB/67°FWB)
35°CDB (95°FDB)
5m (16-3/8 ft)
0m (0 ft)
*3 Nominal heating conditions Unit converter
20°CDB (68°FDB)
7°CDB/6°CWB (45°FDB/43°FWB)
7.5 m (24-9/16 ft)
0 m (0 ft)
* Due to continuing improvement, above specification may be subject to change without notice.
* Nominal conditions *1, *3 are subject to JIS B8615-1.
kcal/h = kW × 860
Btu/h = kW × 3,412
cfm = m3/min × 35.31
lb = kg/0.4536
*Above specification data is
subject to rounding variation.
Service Ref.
Power source
Cooling capacity
(Nominal)
Heating capacity
(Nominal )
External finish
External dimension H × W × D
Net weight
Heat exchanger
Fan
Noise level (Low-Mid-High)
(measured in anechoic room)
Insulation material
Air filter
Protection device
Refrigerant control device
Connectable outdoor unit
Diameter of
refrigerant pipe
Field drain pipe size
Standard
attachment
Remarks
Power input
Current input
Power input
Current input
Type × Quantity
External
static press.
Motor type
Motor output
Driving mechanism
Airflow rate
(Low-Mid-High)
Liquid
Gas
Document
Accessory
Optional parts
Installation
kW
kcal/h
Btu/h
kcal/h
kW
A
kW
kcal/h
Btu/h
kW
A
mm
in.
kg (lb)
Pa
mmH2O
kW
m3/min
L/s
cfm
dB <A>
mm (in.)
mm (in.)
mm (in.)
*1
*1
*1
*2
*3
*3
*3
(R410A)
(R22, R407C)
(R410A)
(R22, R407C)
Installation Manual, Instruction Book
1-phase 220-240V 50Hz, 1-phase 220V 60Hz
Cross fin (Aluminum fin and copper tube)
DC motor
Direct-drive
Polyethylene sheet
PP honeycomb
Fuse
LEV
R410A, R407C, R22 CITY MULTI
PKFY-P32VHM-ER1
Plastic, MUNSELL (1.0Y 9.2/0.2)
3.6
3,100
12,300
3,150
0.04
0.40
4.0
3,400
13,600
0.03
0.30
295 × 898 × 249
11-5/8" × 35-3/8" × 9-13/16"
13 (29)
Line flow fan × 1
0
0
0.030
PKFY-P40VHM-ER1
9 - 10.5 - 12
150 - 175 - 200
318 - 371 - 424
34 - 39 - 43
I.D. 16mm (5/8")
ø6.35 (ø1/4")
ø6.35 (ø1/4")
ø12.7 (ø1/2")
ø12.7 (ø1/2")
Flare
Flare
Flare
Flare
ø6.35 (ø1/4")
ø6.35 (ø1/4")
ø12.7 (ø1/2")
ø12.7 (ø1/2")
Flare
Flare
Flare
Flare
PKFY-P50VHM-ER1
5.6
4,800
19,100
5,000
0.04
0.40
6.3
5,400
21,500
0.03
0.30
9 - 10 - 11
150 - 167 - 183
318 - 353 - 388
34 - 37 - 41
ø6.35 (ø1/4")
ø9.52 (ø3/8")
ø12.7 (ø1/2")
ø15.88 (ø5/8")
Flare
Flare *5
Flare
Flare *5
—
Drain pump kit PAC-SH75DM-E
Details on foundation work, insulation work, electrical wiring, power source switch, and other items shall be referred to the
Installation Manual.
*4
*4
9 - 10.5 - 11.5
150 - 175 - 192
318 - 371 - 406
34 - 38 - 41
*4 Electrical characteristics of cooling are included optional drain-pump. *5 Connect the joint (purchased locally)
for R407C/R22.

10
Parts name
Service Ref.
Symbol
TH21
TH22
TH23
TH24
FUSE
MF
MV
LEV
TB2
TB5
TB15
Resistance 0/15k, 10/9.6k, 20/6.3k, 25/5.4k, 30/4.3k, 40/3.0k
Resistance 0/15k, 10/9.6k, 20/6.3k, 25/5.4k, 30/4.3k, 40/3.0k
Resistance 0/15k, 10/9.6k, 20/6.3k, 25/5.4k, 30/4.3k, 40/3.0k
250V 3.15A
8-Pole Output 30W / RCOJ30-CK
MSFBC20 DC12V
(L, N, ) 250V 20A
(M1, M2, S) 250V 20A
(1, 2) 250V 10A
Liquid pipe thermistor
Gas pipe thermistor
Linear expansion valve
PKFY-P32VHM-E
PKFY-P32VHM-ER1
PKFY-P40VHM-E
PKFY-P40VHM-ER1
Room temperature
thermistor
Fuse
(Indoor controller board)
Fan motor
Vane motor
(with limit switch)
Power supply terminal
block
Transmission terminal
block
DC12V Stepping motor drive
Port :3.2 (0~2000pulse)
PKFY-P50VHM-E
PKFY-P50VHM-ER1
MA remote controller
terminal block
PKFY-P32, 40VHM-E
External static pressure : 0Pa
Power source : 220,230,240V, 50Hz / 220V, 60Hz
PKFY-P32, 40VHM-ER1
External static pressure : 0Pa
Power source : 220,230,240V, 50Hz / 220V, 60Hz
* Measured in anechoic room.
PKFY-P32VHM-E
PKFY-P40VHM-E
PKFY-P50VHM-E
33-36-38-41
34-37-40-43
Sound level dB (A)
Sound level at anechoic room : Low-(Middle2-Middle1)-High
OCTAVE BAND PRESSURE LEVEL (dB) 0dB = 20MPa
1.0m
1.0m
Measurement location
OCTAVE BAND PRESSURE LEVEL (dB) 0dB = 20MPa
PKFY-P32VHM-ER1
PKFY-P40VHM-ER1
PKFY-P50VHM-ER1
34-37-41
34-39-43
Sound level dB (A)
Sound level at anechoic room : Low-Middle-High
Service Ref.
Service Ref.
34-38-41
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
63 125 250 500 1k 2k 4k 8k
Approximate minimum
audible limit on
continuous noise
Approximate minimum
audible limit on
continuous noise
High speed
Low speed
NC60
NC50
NC40
NC30
NC20
OCTAVE BAND CENTER FREQUENCIES(Hz) OCTAVE BAND CENTER FREQUENCIES(Hz)
High speed
Low speed
PKFY-P50VHM-E PKFY-P50VHM-ER1
External static pressure : 0Pa
Power source : 220,230,240V, 50Hz / 220V, 60Hz
OCTAVE BAND PRESSURE LEVEL (dB) 0dB = 20MPa
OCTAVE BAND CENTER FREQUENCIES(Hz)
Approximate minimum
audible limit on
continuous noise
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
63 125 250 500 1k 2k 4k 8k
NC60
NC50
NC40
NC30
NC20
High speed
Low speed
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
63 125 250 500 1k 2k 4k 8k
NC60
NC50
NC40
NC30
NC20
4-2. Electrical parts specifications
4-3. Sound levels
4-4. NC curves

1111
OUTLINES AND DIMENSIONS
5
Min.7
250mm or greater with optional
drain pump installation.
Required space (Indoor unit)
Min.50
Min.220 Min.150
550mm or greater with optional drain pump installation.
Min.250 Min.50
55mm or greater with left or rear left pipng or drain pump installation.
197
387 192
599
Top side
Front side
155
688
898
55
295
Front side (Grille open)
169
158
184
457 Gas pipe 
539 Liquid pipe 
610 Drain hose 
Terminal block for power supply
Terminal block for transmission
Terminal block for MA-remote controller
Emergency operation switch (cooling/heating)
Under side
Vane (auto) Operation lamp
612
DEFROST/STAND BY lamp
Receiver
Knockout hole for lower piping
Louver (manual)
Knockout hole for lower piping C
8
B
Size
Refrigerant pipe : :6.35 Flared connection : 1/4F Refrigerant pipe : :12.7 Flared connection : 1/2F
:16 O.D.

Liquid pipe

Gas pipe

Drain hose
Knockout hole for right piping
Right side
Mount board
21.8 0 20
32.7
53.5
66
128.5
153.5 231.5
273.2
449
281
193.5
180.3
278.3
167
140
115
0
174
213
238
394
449
253.5
232.5 203.5 178.5
166
103.5
91
78.5
116
41
28.516
0
372.3
356.3
327.5
291.5
265
225
200
125
70
15
0
15
70
125
200
225
265
238
291.5
327.5
372.3
356.3
Indoor unit outline
Mount board
4-:9 Bolt hole
77-:5.1 Tapping screw hole
0
58
3.8
Center measurement hole :2.5
AB
43
656
46
60
46
43
59
C
56
12.5
43
D
43
656
69
Knockout hole for piping
Knockout hole for left piping
Left side
Sleeve (purchased locally)
:65~:80 :65~:80
Through hole
249
A 5
P50VHM-E
P50VHM-ER1
:6.35 / :9.52 1/4F / 3/8F
:12.7 / :15.88 1/2F / 5/8F
P40
P32
PKFY-P32, 40, 50VHM-E
PKFY-P32, 40, 50VHM-ER1 Unit : mm

12
WIRING DIAGRAM6
<fig.  1> PKFY-P·VHM-E
Models SW2
P32
P40
P50 123456
ON
OFF
FAN
CNMF
(WHT)
163
MS
3
~
M
1
~
M
VANE
CN151
(WHT)
51 LEV
CN60
(YLW)
6
6
1
CNRU
(WHT)
LDSWE ( A )
(
BLU )
61
3
3
151
51
41
41
21
21
31
41
81
13
51
13
12
12345678
SW3
123456
SW2
ON
OFF
ON
OFF
1234
SW4
21
11 2
2
3
3
45678910
SW1
SWA
L
N
LED1
X1
LED2
M
DC311 ~ 339V
RECTIFICATION
FUSE
CNP
( BLU )
CND
(BLK)
RED BLU YLW
MOV1
BLK WHT
MF DP MV LEV
DSA
MOV2
SWE
OFF
BZ
ON
BLU
TB2
RED
RED
BLU
BLU
YLW
WHT
ORN ORN
ORN
ORN
YLW
BLU
BRN
BRN
RED
GRN/YLW
RED
BLU
BLK
U
U
I.B S.B
W.B
A.B
PULL
BOX
FUSE
( 16A )
BREAKER
( 16A )
TO NEXT
INDDOR
UNIT
POWER SUPPLY
~/N220-240V 50Hz
220V 60Hz
GRN
CN52
(GRN)
LD SWE(B)
LD101(B)
SWE1
LED1
TH24
TH23
TH22
TH21
LED2
SWE2
CN51
(WHT)
CN24
(YLW)
FLOAT SW
CN4F
(WHT)
FLOAT SW
CN4F
(WHT)
LIQUID/GAS1
CN44
(WHT)
INTAKE
CN20
(RED)
ADDRESS
CN81
(RED)
ADDRESS
CN42
(RED)
GAS2
CN2G
(BLK)
ADDRESS
CN43
(RED)
ADDRESS
CN82
(RED)
MA-REMOCON
CN3A
(BLU)
M-NET
CN2M(BLU)
CN32
(WHT)
RU
4
8
t
○
t
○
t
○
t
○
See fig.  1
TB5
(SHIELD)
M1
M2
TB15
1
S
2
TO MA- REMOTE
CONTROLLER
DC8.7-13V
TO OUTDOOR UNIT
BC CONTROLLER
REMOTE CONTROLLER
DC24-30V
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
SW14SW11SW12
10ths
DIGIT
1s
DIGIT
BRANCH
No.
FS
1
4
When attaching drain
pump(option), remove
the jumper connector
CN4F and fit the drain
float switch (FS).
When attaching drain pump
(option)
SYMBOL NAME
I.B INDOOR CONTROLLER BOARD
BZ
CN32
CN51
CN52
CONNECTOR
BUZZER
DSA SURGE ABSORBER
REMOTE SWITCH
A.B ADDRESS BOARD
S.B SWITCH BOARD
W.B PCB FOR WIRELESS REMOTE CONTROLLER
SW1
SWA
SW11
SW12
MODE SELECTION
FAN SPEED SELECTOR
ADDRESS SETTING 1s DIGIT
SWE1
SWE2
EMERGENCY OPERATION(HEAT)
EMERGENCY OPERATION(COOL)
LED(OPERATION INDICATOR: GREEN)
LED(OPERARTION FOR HEATING : ORANGE )
RECEIVING UNIT
ADDRESS SETTING 10ths DIGIT
SW14 BRANCH No.
CENTRALLY CONTROL
REMOTE INDICATION
SWITCH
X1 AUX.RELAY
FUSE FUSE (T3.15AL 250V)
LED1 POWER SUPPLY (I.B)
LED2
LED1
DP DRAIN PUMP (OPTION)
DRAIN FLOAT SWITCH (OPTION)
FS
LED2
RU
POWER SUPPLY (I.B)
SYMBOL NAME
TH21
MF
MV
THERMISTOR ROOM TEMP. DETECTION
(0°C/15kΩ, 25°C/5.4kΩ)
PIPE TEMP. DETECTION / LIQUID
(0°C/15kΩ, 25°C/5.4kΩ)
PIPE TEMP. DETECTION / GAS1
(0°C/15kΩ, 25°C/5.4kΩ)
LEV LINEAR EXPANSION VALVE
TH22
TH23
PIPE TEMP. DETECTION / GAS2
(0°C/15kΩ, 25°C/5.4kΩ)
TH24
FAN MOTOR
VANE MOTOR
MOV 01.02 VARISTOR
DRAIN PUMP (
OPTION )
TB2
TB5
TB15
TRANSMISSION
MA-REMOTE CONTROLLER
TERMINAL
BLOCK
POWER SUPPLY
SW2
SW3
SW4
SWE
CAPACITY CODE
MODE SELECTION
MODEL SELECTOR
DRAIN PUMP (TEST MODE)
SWITCH
NOTES:
1. At servicing for outdoor unit,always follow the wiring diagram of outdoor unit.
2. In case of using MA-Remote controller, please connect to TB15.
(Remote controller wire is non-polar.)
3. In case of using M-NET, please connect to TB5. (Transmission line is non-polar.)
4. Symbol [S] of TB5 is the shield wire connection.
5. Symbols used in wiring diagram above are, : terminal block, :connecter.
6. The setting of the SW2 dip switches differs in the capacity. For the detail, refer to the fig. 1.
Mark Meaning Function
Power supply for
MA-Remote controller
Main power supply (Indoor unit: 220-240V)
Power on →Iamp is lit
LED on indoor board for service
LED1 Main power supply
Power supply for MA-Remote controller
on →Iamp is lit
LED2
PKFY-P·VHM-ER1
Models SW2
P32
P40
P50
123456
ON
OFF
123456
ON
OFF
123456
ON
OFF
PKFY-P32, 40, 50VHM-E
PKFY-P32, 40, 50VHM-ER1

13
TROUBLESHOOTING
8
7REFRIGERANT SYSTEM DIAGRAM
8-1. HOW TO CHECK THE PARTS
PKFY-P32, 40, 50VHM-E PKFY-P32, 40, 50VHM-ER1
PKFY-P32, 40, 50VHM-E
PKFY-P32, 40, 50VHM-ER1
Parts name Check points
Disconnect the connector then measure the resistance using a tester.
(At the ambient temperature 10~30)
Disconnect the connector then measure the resistance value using a tester.
(Coil temperature 20)
Vane motor (MV)
Linear expansion
valve (LEV)
Refer to the next page for the details.
Room temperature
thermistor (TH21)
Liquid pipe temperature
thermistor (TH22)
Gas pipe temperature
thermistor (TH23 ,24)
Normal
4.3k~9.6k
Abnormal
Open or short
Normal
200± 10%
Abnormal
(1)-(5)
White-Red
(2)-(6)
Yellow-Brown
(3)-(5)
Orange-Red
(4)-(6)
Blue-Brown Open or short
Measure the resistance between the terminals using a tester. (Coil temperature 25)
Normal
350± 7%
Abnormal
-
Brown-Red
-
Brown-Orange
-
Brown-Yellow
-
Brown-Green
Open or short
Fan motor (MF)
 Red
 Yellow
 Brown
Orange

Green
Connect pin No.
M
1
2
3
4
5
6
LEV
White
Yellow
Orange
Blue
Red
Brown
CN60
Refer to 8-1-3.
Strainer (#50mesh)
Strainer (#100mesh)
Strainer1 (#50mesh)
Strainer2 (#100mesh)
Heat exchanger
Room temparature thermistor TH21
Gas pipe thermistor TH23
Liquid pipe thermistor TH22
Linear expansion valve
Gas pipe
Liquid pipe
Flare connection
Gas pipe
Liquid pipe
PKFY-P32VHM-E(R1)
PKFY-P40VHM-E(R1)
:12.7(1/2)
:6.35(1/4)
PKFY-P50VHM-ER1
:12.7(1/2)
:6.35(1/4)
Item
Service Ref.
Unit : mm (inch)
Gas pipe thermistor TH24
PKFY-P50VHM-E
:12.7(1/2)/:15.88(5/8)
:6.35(1/4)/:9.52(3/8)

14
0
10
20
30
40
50
-20-100 1020304050
< Thermistor for lower temperature >
Temperature ()
Resistance (K)
4:4
3
6
5
:3
2:2
1:1
:4
:3
:2
:1
Controller board
Drive circuit
Connector(CN60)
DC12V
Brown
Red
Blue
Orange
Yellow
White
M
4
6
2
3
5
1
Blue
Brown
Yellow
Orange
Red
White
Linear expansion valve
<Thermistor Characteristic graph>
Room temperature thermistor (TH21)
Liquid pipe temperature thermistor (TH22)
Gas pipe temperature thermistor (TH23)
(TH24)
Thermistor R0=15k" ± 3%
Fixed number of B=3480 ± 2%
Rt=15exp { 3480( ) }
0:15k"
10:9.6k"
20:6.3k"
25:5.4k"
30:4.3k"
40:3.0k"
Thermistor for
lower temperature
1Operation summary of the linear expansion valve
• Linear expansion valve opens/closes through stepping motor after receiving the pulse signal from the indoor controller board.
• Valve position can be changed in proportion to the number of pulse signal.
<Connection between the indoor controller board and the linear expansion valve>
1
273+t 1 273
8-1-2. Liner expansion valve
8-1-1. Thermistor

15
Output
(Phase)
Output
{1
1
ON
{2ON
{3OFF
{4OFF
2
OFF
ON
ON
OFF
3
OFF
OFF
ON
ON
4
ON
OFF
OFF
ON
<Output pulse signal and the valve operation>
2Linear expansion valve operation
3Trouble shooting
D
A
E
B
C
Open
Open
Extra tightening (200~800 pulse)
Pulse number
Outdoor unit R410A model : 1400 pulse
Outdoor unit R22/R407C model : 2000 pulse
Opening a valve
all the way
Close
Close
Valve position (capacity)
Closing a valve : 1 →2 →3 →4 →1
Opening a valve : 4 →3 →2 →1 →4
The output pulse shifts in above order.
• When linear expansion valve operation stops, all output phase
become OFF.
• At phase interruption or when phase does not shift in order, motor
does not rotate smoothly and motor will lock and vibrate.
• When the switch is turned on, 2200 pulse closing valve signal will
be sent till it goes to point Ain order to define the valve
position.
• When the valve moves smoothly, there is no noise or vibration
occurring from the linear expansion valves; however, when the
pulse number moves from Eto Aor when the valve is locked,
more noise can be heard than in a normal situation.
• Noise can be detected by placing the ear against the screw
driver handle while putting the screw driver tip to the linear
expansion valve.
6
5
4
3
2
1
LED1k
Symptom Check points
Operation circuit
failure of the micro
processor
Disconnect the connector on the controller board, then con-
nect LED for checking.
When power is turned on, pulse signals will be output for 10
seconds. There must be some defects in the operation circuit
if the LED does not light while the signals are output or keeps
lighting even after the signals stop.
Countermeasures
Exchange the indoor con-
troller board in case of
drive circuit failure.
Linear expansion
valve mechanism is
locked.
Valve does not close
completely.
Wrong connection
of the connector or
contact failure
To check the linear expansion valve, operate the indoor unit
in fan mode and at the same time operate other indoor units
in cooling mode, then check the pipe temperature <liquid
pipe temperature> of the indoor unit by the
outdoor multi controller board operation
monitor. During fan operation, linear expan-
sion valve is closed completely and if there
is any leaking, detecting temperature of
the thermistor will go lower. If the detected
temperature is much lower than the tem-
perature indicated in the remote controller,
it means the valve is not closed all the way.
It is not necessary to exchange the linear expansion valve, if
the leakage is small and not affecting normal operation.
Thermistor
(Liquid pipe)
Linear
expansion
valve
Motor will idle and make a ticking noise when the motor is
operated while the linear expansion valve is locked. This tick-
ing sound is the sign of the abnormality.
Check the color of lead wire and missing terminal of the con-
nector.
Exchange the linear expan-
sion valve.
Exchange the linear expan-
sion valve.
If large amount of refriger-
ant is leaked, exchange
the linear expansion valve.
Disconnect the connector
at the controller board,
then check the continuity.
Measure the resistance between each coil (white-red, yellow-
brown, orange-red, blue-brown) using a tester. It is normal if
the resistance is in the range of 200 ±10%.
Short or breakage
of the motor coil of
the linear expansion
valve

16
Notes
· High voltage is applied to the connecter (CNMF) for the fan motor. Pay attention to the service.
· Do not pull out the connector (CNMF) for the motor with the power supply on.
(It causes trouble of the indoor controller circuit board and fan motor.)
Self check
Symptom : The indoor fan cannot turn around.
Yes
NG
NG
NG
Wiring contact check
Contact of fan motor connector (CNMF)
Power supply check (Remove the connector (CNMF))
Measure the voltage in the indoor controller circuit board.
TEST POINT : VDC (between 1 (+) and 3 (-) of the fan connector): VDC DC310~340V
TEST POINT : VCC (between 4 (+) and 3 (-) of the fan connector): VCC DC15V
Wiring recovery
Replace indoor controller board.
Replace indoor controller board.
Replace the fan motor
Replace the fan motor
Indoor controller board fuse check
Replace indoor
controller board
Replace the fan motor.
Is the voltage normal?
Is there contact failure?
No
Yes
No
No
Is the fuse normal? Replace the fuse
Yes
Check the operation END
OK
Check the operation END
Check the operation END
OK
Check the operation END
OK
NG
OK
Check method of DC fan motor (fan motor/indoor controller circuit board)
Sensor signal check
Measure the voltage between CNMF and DC 0V
and DC 15V in the indoor controller circuit board.
Does the voltage repeat
DC 0V and DC 15V?
No
Yes
8-1-3. DC Fan motor (fan motor/indoor controller circuit board)

17
PKFY-P32, 40, 50VHM-E PKFY-P32, 40, 50VHM-ER1
1
2
3
4
5
6
7
8
9
10
1~6
1
2
3
4
5
6
7
8
Thermistor<Room temperature>
position
ON OFF
Filter clogging detection Provide Not provide
Filter cleaning sign 2,500 hr 100 hr
Fresh air intake Not effective Not effective
Switching remote controller display Thermo ON signal indication Fan output indication
Humidifier control Fan operation at Heating mode
Thermo ON operation at
heating mode
Low +1 Extra low +1
Setting air flow +1 Depends on SW1-7
Auto restart function Effective Not effective
Power ON/OFF by breaker Effective Not effective
Heat pump/Cool only Cooling only Heat pump
Not used
Not used
Vane horizontal angle Second setting +1 First setting
Effective Not effective
Heating 4 degree up Not effective Effective
Target superheat setting +2 —
——
——
—
Target subcool +2 ——
ON
OFF
1234567 8
ON
OFF
12345678910
Address board
<Initial setting>
Indoor controller board
<Initial setting>
SW3
Function
selection
Under
suspension
SW2
Capacity
code
Before
power
supply
ON
switch
SW1
Mode
Effective
timing
Under
suspension
selection
Switch Pole Function
Operation by switch
Remarks
Built-in remote controller
Indoor unit
Changing the opening of linear
expansion valve during thermo OFF
+
1
SW1-7
OFF
ON
OFF
ON
SW1-8
OFF
OFF
ON
ON
Fan speed
Extra low
Low
Setting air flow
Stop
+2 It is impossible to intake
the fresh air.
+1 Second setting is same as
first setting.
+2 Please do not use SW3-7,8
as trouble might be caused
by the usage condition.
Air flow set in case of heat
thermo OFF
NOTE:
+2
PKFY-P·VHM-E
Models SW2
P32
P40
P50 123456
ON
OFF
PKFY-P·VHM-ER1
Models SW2
P32
P40
P50
123456
ON
OFF
123456
ON
OFF
123456
ON
OFF
Indoor controller board
Indoor controller board
1~4 ON
OFF
1234
SW4
Model
selection
In case of replacing the indoor controller board, make sure to set the
switch to the initial setting, which is shown below.
Before
power
supply
ON
8-2. Function of Dip switch

18
J41, J42
Wireless
remote
controller
Pair No.
Jumper
<Initial setting>
Pattern A
Setting pattern
J41 J42
Indoor controller
jumper wire Pair No. of wireless
remote controller
Initial setting
A
B
D
C
—
Cut
Cut
—
—
—
Cut
Cut
0
1
3
2
—
—
—
Pair No.4-9 of wireless remote controller is setting pattern D.
ON/OFF TEMP
FAN
VANE
MODE
CHECK
LOUVER
TEST RUN
AUTO STOP
AUTO START
h
min
RESET
SET CLOCK
MODEL SELECT
Model No.
Temperature
button
SET button
Pair No.
Minute
button
• To operate each indoor unit by each remote controller when installed 2 indoor
units or more are near, Pair No. setting is necessary.
Pair No. setting is available with the 4 patterns
(Setting patterns A to D). .
Make setting for J41, J42 of indoor controller board and the Pair No. of
wireless remote controller.
• You may not set it when operating it by one remote controller.
Setting for indoor unit
Cut jumper wire J41, J42 on the indoor controller board according to the
table below.
Wireless remote controller pair number:
Setting operation
1. Press the SET button (using a pointed implement). Check that the
remote controller's display has stopped before continuing.
MODEL SELECT flashes, and the model No. (3 digits) appears (steadily-lit).
2. Press the MINUTE button twice. The pair number appears flashing.
3. Press the temperature buttons to select the pair number to set.
4. Press the SET button (using a pointed implement). The set pair number is
displayed (steadily-lit) for 3 seconds, then disappears.
Operation by switch
Switch Remarks
Under
operation
or
suspension
Effective
timing
0
5
9
4
8
3
7
2
6
1
SW12
10
0
5
9
4
8
3
7
2
6
1
SW11
1
0
8
F
7
E
6
D
5
C
4
B
3
A
2
9
1
SW14
0
5
9
4
8
3
7
2
6
1
SW12
0
5
9
4
8
3
7
2
6
1
SW11
0
8
F
7
E
6
D
5
C
4
B
3
A
2
9
1
SW14
Address board
Address board
<Initial setting>
<Initial setting>
SW11
1s digit
address
setting
SW12
10ths digit
address
setting
Rotary switch
SW14
Branch
No.
Setting
Rotary Switch
How to set addresses
Example : If address is "3", remain SW12
(for over 10) at "0", and match SW11 (for 1 to 9)
with "3".
How to set branch numbers SW14 (Series R2 only)
Match the indoor unit’s refrigerant pipe with
the BC controller’s end connection number.
Remain other than series R2 at "0".
Before
power
supply
ON

19
8-3. TEST POINT DIAGRAM
8-3-1. Indoor controller board
PKFY-P32VHM-E PKFY-P32VHM-ER1
PKFY-P40VHM-E PKFY-P40VHM-ER1
PKFY-P50VHM-E PKFY-P50VHM-ER1
CN3A
Connected to the termial
block (TB15)
(MA-Remote controller
connecting wire)
1- 3 :8.7-13V DC
(Pin1 (+))
CN44
Pipe temperature thermistor
1-2: Liquid (TH22)
3-4: Gas1 (TH23)
SW4
Model selection
CND
Power supply for
indoor controller board
1-3: 220-240AC
SW2
Capacity setting
LED1
Main power supply
(Indoor unit :
220-240V)
CN20
Room temperature
thermistor (TH21)
LED2
Power supply for
MA-Remote controller
CN32
Remote switch
Jumper wire J41, J42
Pair No. setting for wireless
remote controller
LDSWE(A)
Connect to the
wireless remote
controller board
(S.B)
CN2M
Connect to the
terminal block (TB5)
(M-NET transmission
connecting wire)
24-30VDC (non-polar)
Power supply from
outdoor unit
SW3
Function setting
CN2G
Pipe temperature
thermistor
Gas2 (TH24)
CN4F
Drain float switch
(FS)
CN51
Centrally control-
led
CN60
Liner expansion
valve (LEV) output
12VDC pluse output
CN52
Remote indicator
CNRU
Connect to the
wireless remote
controller board
(W.B)
CN151
Vane motor output
12VDC pluse
CNP
Drain pump output
(DP)
1-3: 220-240AC
FUSE
3.15A 250V
CNMF
Connect to the fan motor (MF)
1-3: DC310~340V
4-3: DC15V
5-3: DC0~6V
6-3: DC0 or DC15V (Stop)
DC7.5V (Operation)
(12VDC pluse)
LD SWE (B)
Connect to the indoor
controller board (I.B)

1234 56789 10
1
2
3
4
5
6
7
8
9
0

1
2
3
4
5
6
7
8
9
0

1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0

20
8-3-3. Address board
PKFY-P32VHM-E PKFY-P32VHM-ER1
PKFY-P40VHM-E PKFY-P40VHM-ER1
PKFY-P50VHM-E PKFY-P50VHM-ER1
SW1
Function setting
SW12
Address setting
10ths DIGIT
SW11
Address setting
1s DIGIT
8-3-2. Wireless remote controller board
PKFY-P32VHM-E PKFY-P32VHM-ER1
PKFY-P40VHM-E PKFY-P40VHM-ER1
PKFY-P50VHM-E PKFY-P50VHM-ER1
LD101
Connect to the
indoor controller
board (I.B)
SW14
Branch No.