Mitsubishi Electric PFFY-P20VLEM-A Operating manual

TECHNICAL & SERVICE MANUAL
Air-Conditioners For Building Application
<Indoor unit>
PFFY-P25VLEM-A,PFFY-P25VLRM-A
PFFY-P20VLEM-A,PFFY-P20VLRM-A
PFFY-P32VLEM-A,PFFY-P32VLRM-A
PFFY-P40VLEM-A,PFFY-P40VLRM-A
PFFY-P50VLEM-A,PFFY-P50VLRM-A
PFFY-P63VLEM-A,PFFY-P63VLRM-A
2001
Models
Floor Standing Type
Series PFFY
CONTENTS
SAFETY PRECAUTIONS ·························1
1. FEATURES············································3
2. PART NAMES AND FUNCTIONS ········4
3. SPECIFICATION ···································6
4. OUTLINES AND DIMENSIONS············8
5. WIRING DIAGRAM ·····························10
6. REFRIGERANT SYSTEM DIAGRAM ····11
7. TROUBLE SHOOTING························12
8. DISASSEMBLY PROCEDURE ···········17
For use with the R407C & R22
Exposed type Concealed type

1
- Inadequate connection and fastening may generate heat and
cause a fire.
• Prepare for typhoons and other strong winds and earthquakes
and install the unit at the specified place.
- Improper installation may cause the unit to topple and result in
injury.
• Always use an air cleaner, humidifier, electric heater, and other
accessories specified by Mitsubishi Electric.
- Ask an authorized technician to install the accessories. Improper
installation by the user may result in water leakage, electric shock,
or fire.
• Never repair the unit. If the air conditioner must be repaired,
consult the dealer.
- If the unit is repaired improperly, water leakage, electric shock, or
fire may result.
• Do not touch the heat exchanger fins.
- Improper handling may result in injury.
• If refrigerant gas leaks during installation work, ventilate the
room.
- If the refrigerant gas comes into contact with a flame, poisonous
gases will be released.
• Install the air conditioner according to this Installation Manual.
- If the unit is installed improperly, water leakage, electric shock, or
fire may result.
• Have all electric work done by a licensed electrician according
to “Electric Facility Engineering Standard” and “Interior Wire
Regulations”and the instructions given in this manual and al-
ways use a special circuit.
- If the power source capacity is inadequate or electric work is per-
formed improperly, electric shock and fire may result.
• Securely install the cover of control box and the panel.
- If the cover and panel are not installed properly, dust or water
may enter the outdoor unit and fire or electric shock may result.
• When installing and moving the air conditioner to another site,
do not charge the it with a refrigerant different from the refrig-
erant (R407C or R22) specified on the unit.
- If a different refrigerant or air is mixed with the original refrigerant,
the refrigerant cycle may malfunction and the unit may be dam-
aged.
• If the air conditioner is installed in a small room, measures
must be taken to prevent the refrigerant concentration from
exceeding the safety limit even if the refrigerant should leak.
- Consult the dealer regarding the appropriate measures to pre-
vent the safety limit from being exceeded. Should the refrigerant
leak and cause the safety limit to be exceeded, hazards due to
lack of oxygen in the room could result.
• When moving and reinstalling the air conditioner, consult the
dealer or an authorized technician.
- If the air conditioner is installed improperly, water leakage, elec-
tric shock, or fire may result.
• After completing installation work, make sure that refrigerant
gas is not leaking.
- If the refrigerant gas leaks and is exposed to a fan heater, stove,
oven, or other heat source, it may generate noxious gases.
• Do not reconstruct or change the settings of the protection
devices.
- If the pressure switch, thermal switch, or other protection device
is shorted and operated forcibly, or parts other than those specified
by Mitsubishi Electric are used, fire or explosion may result.
1. Before installation and electric work
sBefore installing the unit, make sure you read all the
“Safety precautions”.
sThe “Safety precautions” provide very important
points regarding safety. Make sure you follow them.
sThis equipment may not be applicable to EN61000-3-
2: 1995 and EN61000-3-3: 1995.
s
sPlease report to or take consent by the supply au-
thority before connection to the system.
Symbols used in the text
Warning:
Describes precautions that should be observed to prevent danger
of injury or death to the user.
Caution:
Describes precautions that should be observed to prevent damage
to the unit.
Symbols used in the illustrations
: Indicates an action that must be avoided.
: Indicates that important instructions must be followed.
: Indicates a part which must be grounded.
: Indicates that caution should be taken with rotating parts. (This
symbol is displayed on the main unit label.) <Color: Yellow>
: Beware of electric shock (This symbol is displayed on the main
unit label.) <Color: Yellow>
Warning:
Carefully read the labels affixed to the main unit.
Warning:
• Ask the dealer or an authorized technician to install the air con-
ditioner.
- Improper installation by the user may result in water leakage, elec-
tric shock, or fire.
• Install the air unit at a place that can withstand its weight.
- Inadequate strength may cause the unit to fall down, resulting in
injuries.
• Use the specified cables for wiring. Make the connections se-
curely so that the outside force of the cable is not applied to the
terminals.
This equipment may have an adverse effect equip-
ment on the same electrical supply system.
SAFETY PRECAUTIONS

2
2. Precautions for devices that use
R407C refrigerant
Caution:
• Do not use the existing refrigerant piping.
- The old refrigerant and refrigerator oil in the existing piping con-
tains a large amount of chlorine which may cause the refrigerator
oil of the new unit to deteriorate.
• Use refrigerant piping made of C1220 (CU-DHP) phosphorus
deoxidized copper as specified in the *JIS H3300 “Copper and
copper alloy seamless pipes and tubes”. In addition, be sure
that the inner and outer surfaces of the pipes are clean and
free of hazardous sulphur, oxides, dust/dirt, shaving particles,
oils, moisture, or any other contaminant.
- Contaminants on the inside of the refrigerant piping may cause
the refrigerant residual oil to deteriorate.
*JIS: Japanese Industrial Standard
• Store the piping to be used during installation indoors and keep
both ends of the piping 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.
• Use ester oil, ether oil or alkylbenzene (small amount) as the
refrigerator oil to coat flares and flange connections.
- The refrigerator oil will degrade if it is mixed with a large amount of
mineral oil.
• Use liquid refrigerant to fill 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 refrig-
erant may cause the refrigerator oil to deteriorate.
• Use a vacuum pump with a reverse flow check valve..
- The vacuum pump oil may flow back into the refrigerant cycle and
cause the refrigerator oil to deteriorate.
• Do not use the following tools that are used with conventional
refrigerants.
(Gauge manifold, charge hose, gas leak detector, reverse flow
check valve, refrigerant charge base, vacuum gauge, refriger-
ant recovery equipment)
- If the conventional refrigerant and refrigerator oil are mixed in the
R407C, the refrigerant may deteriorated.
- If water is mixed in the R407C, the refrigerator oil may deteriorate.
- Since R407C does not contain any chlorine, gas leak detectors
for conventional refrigerants will not react to it.
• Do not use a charging cylinder.
- Using a charging cylinder may cause the refrigerant to deteriorate.
• Be especially careful when managing the tools.
- If dust, dirt, or water gets in the refrigerant cycle, the refrigerant
may deteriorate.

3
PFFY-P20VLEM-A,PFFY-P20VLRM-A
PFFY-P25VLEM-A,PFFY-P25VLRM-A
PFFY-P32VLEM-A,PFFY-P32VLRM-A
PFFY-P40VLEM-A,PFFY-P40VLRM-A
PFFY-P50VLEM-A,PFFY-P50VLRM-A
PFFY-P63VLEM-A,PFFY-P63VLRM-A
2.2/ 2.5
2.8/ 3.2
3.6/ 4.0
4.5/ 5.0
5.6/ 6.3
7.1/ 8.0
Floor Standing Type
Series PFFY
Models Cooling capacity/Heating capacity
kW
FEATURES1
Concealed type
Exposed type

4
●
● ● Remote
Indoor (Main) Unit
controller [PAR-20MAA]
Once the controls are set, the same operation mode can
be repeated by simply pressing the ON/OFF button.
● Operation buttons
PAR-20MAA
ON/OFF
CENTRALLY CONTROLLED
ERROR CODE
CLOCK
ON OFF
ßC
CHECK
CHECK MODE
FILTER
TEST RUN
FUNCTION
ßC
1Hr.
NOT AVAILABLE
STAND BY
DEFROST
FILTER
CHECK TEST
TEMP.
TIMER SET
1
2
3
4 56879
0
C
A
B
1[Room temperature adjustment] Button
2[Timer/continuous] Button
3[Selecting operation] Button
4[Time selection] Button
[Time-setting] Button
5[Louver] Button
6[Fan speed adjustment] Button
7[Up/down airflow direction] Button
8[Ventilation] Button
9[Checking/built-in] Button
0[Test run] Button
A[Filter] Button
B[ON/OFF] Button
CPosition of built-in room temperature
¥Never expose the remote controller to direct sunlight. Doing so can result in the erroneous measure-
ment of room temperature.
¥Never place any obstacle around the lower right-hand section of the remote controller. Doing so can
result in the erroneous measurement of room temperature.
PART NAMES AND FUNCTIONS2
Concealed type
Air inlet
Air outlet
Air inlet
Air outlet
Exposed type

5
●Display
ON/OFF
CENTRALLY CONTROLLED
ERROR CODE
CLOCK
ON OFF
°C
CHECK
CHECK MODE
FILTER
TEST RUN
FUNCTION
°C
1Hr.
NOT AVAILABLE
STAND BY
DEFROST
TEMP.
ABCD
E
F
HIKLJ
M
P
N
O
R
SQTU
G
(A) Current time/Timer
(B) Centralized control
(C) Timer ON
(D) Abnormality occurs
(E) Operation mode: COOL, DRY, AUTO, FAN, HEAT
(F) Preparing for Heating mode
(G) Defrost mode
(H) Set temperature
(I) Power ON
(J) Louver
(K) Not available function
(L) Ventilation
(M) Function setting mode
(N) Test run mode
(O) Error check mode
(P) Filter sign
(Q) Set effective for 1 hr.
(R) Sensor position
(S) Room temperature
(T) Airflow
(U) Fan speed

6
Power source
Model PFFY-P20
VLEM-A
PFFY-P25
VLEM-A
PFFY-P32
VLEM-A
PFFY-P40
VLEM-A
PFFY-P63
VLEM-A
Item
Dimension
Fan
Motor
Refrigerant
pipe dimension
Power consumption
Current
Cooling capacity
Heating capacity
External finish (Munsel No.)
Net weight
Heat exchanger
Air filter
Drain pipe dimension
Noise level
(Low-High)
Voltage
Frequency
Cooling
Heating
Cooling
Heating
Height
Width
Depth
Type
External static pressure
Type
Output
Gas(Flare)
Liquid(Flare)
~V
Hz
kW
kW
kW
kW
A
A
mm
mm
mm
kg
m3/min
Pa
kW
mm
mm
220-240 208-230
50 60
3.6
4.0
0.06
0.06
0.29
0.29
Galvanized steel plate (5Y 8/1)
630
220
25
Cross fin( Alminium plate fin and copper tube)
0
Single phase induction motor
PP Honeycomb fabric
Accessory hose (top end:20)
4.5
5.0
7.1
8.0
2.2
2.5
2.8
3.2
0.04
0.04
0.19
0.19
0.06
0.06
0.25
0.25
220-240 208-230
50 60
0.04
0.04
0.19
0.19
0.06
0.06
0.25
0.25
220-240 208-230
50 60
0.07
0.07
0.30
0.30
220-240 208-230
50 60
0.075
0.075
0.33
0.33
220-240 208-230
50 60
0.09
0.09
0.41
0.41
220-240 208-230
50 60
0.11
0.11
0.47
0.47
11701050
Note:1
Note:1
Note:2
Note:2
23
Sirocco fan
X 1
5.5-6.5 7.0-9.0 9.0-11.0 12.0-14.0 12.0-15.5
0.015
23
5.5-6.5
0.015 0.018 0.030 0.035 0.050
Sirocco fan X 2
26 32
1410
Airflow rate (Low-High)
40-4638-4335-4034-40
0.065
0.065
0.32
0.32
0.10
0.10
0.46
0.46
ø 12.7
ø 6.35
ø 15.88
ø 9.52
PFFY-P50
VLEM-A
5.6
6.3
30
0.085
0.085
0.40
0.40
Power source
Model PFFY-P20
VLRM-A
PFFY-P25
VLRM-A
PFFY-P32
VLRM-A
PFFY-P40
VLRM-A
PFFY-P63
VLRM-A
Item
Dimension
Fan
Motor
Refrigerant
pipe dimension
Power consumption
Current
Cooling capacity
Heating capacity
External finish (Munsel No.)
Net weight
Heat exchanger
Air filter
Drain pipe dimension
Noise level
(Low-High)
Voltage
Frequency
Cooling
Heating
Cooling
Heating
Height
Width
Depth
Type
External static pressure
Type
Output
Gas(Flare)
Liquid(Flare)
~V
Hz
kW
kW
kW
kW
A
A
mm
mm
mm
kg
m3/min
Pa
kW
mm
mm
3.6
4.0
Galvanized steel plate
639
220
20
Cross fin( Alminium plate fin and copper tube)
0
Single phase induction motor
PP Honeycomb fabric
Accessory hose (top end:20)
4.5
5.0
7.1
8.0
2.2
2.5
2.8
3.2
1006886
Note:1
Note:1
Note:2
Note:2
18.5
Sirocco fan
X 1
5.5-6.5 7.0-9.0 9.0-11.0 12.0-14.0 12.0-15.5
0.015
18.5
5.5-6.5
0.015 0.018 0.030 0.035 0.050
Sirocco fan X 2
21 27
1246
Airflow rate (Low-High)
40-4638-4335-4034-40
ø 12.7
ø 6.35
ø 15.88
ø 9.52
PFFY-P50
VLRM-A
5.6
6.3
25
Note: 1.Cooling / Heating capacity indicates the maximum value at operation under the following condition.
Cooling :Indoor 27°CDB/19 °CWB Heating :Indoor 20°C
:Outdoor 35°CDB :Outdoor 7°CDB/6°CWB
220-240 208-230
50 60
0.06
0.06
0.29
0.29
0.04
0.04
0.19
0.19
0.06
0.06
0.25
0.25
220-240 208-230
50 60
0.04
0.04
0.19
0.19
0.06
0.06
0.25
0.25
220-240 208-230
50 60
0.07
0.07
0.30
0.30
220-240 208-230
50 60
0.075
0.075
0.33
0.33
220-240 208-230
50 60
0.09
0.09
0.41
0.41
220-240 208-230
50 60
0.11
0.11
0.47
0.47
0.065
0.065
0.32
0.32
0.10
0.10
0.46
0.46
0.085
0.085
0.40
0.40
2.The figures represent a 240V/50Hz or 230V/60Hz unit measured at a point which is 1m away from the front of the unit and at a height of 1m
from the floor.
The noise is approximately 1dB(A) less for a 230V/50Hz or 220V/60Hz unit and approximately 2dB(A) less for a 220V/50Hz or 208V/60Hz
unit. The noise is approximately 3dB(A) less when the measurement point is 1.5m away from the front of the unit and at a height of 1.5m
from the floor.
SPECIFICATION3
3-1. Specification

7
LEV
C1 1.5µF X 440V
2.5µF
X
440V
2.0µF
X
440V
MF1,2
PFFY-P20
VLEM-A
VLRM-A
PFFY-P63
VLEM-A
VLRM-A
PFFY-P50
VLEM-A
VLRM-A
PFFY-P40
VLEM-A
VLRM-A
PFFY-P32
VLEM-A
VLRM-A
PFFY-P25
VLEM-A
VLRM-A
Model
Parts
name
Tranrsformer T
(Primary) 50/60Hz 220-240V (Secondary) (18.4V 1.7A)
TH21 Resistance 0°C/15kΩ,10°C/9.6kΩ,20°C/6.3kΩ,25°C/5.4kΩ,30°C/4.3kΩ,40°C/3.0kΩ
Resistance 0°C/15kΩ,10°C/9.6kΩ,20°C/6.3kΩ,25°C/5.4kΩ,30°C/4.3kΩ,40°C/3.0kΩ
Resistance 0°C/15kΩ,10°C/9.6kΩ,20°C/6.3kΩ,25°C/5.4kΩ,30°C/4.3kΩ,40°C/3.0kΩ
TH22
Gas pipe
thermistor
FUSE
250V 6.3A
TB2 (L,N, ) 330V 30A
TB5
TB15
(1,2),(M1,M2,S) 300V 10A
Fuse
(Indoor con-
troller board)
Power supply
terminal bed
Transmission
terminal bed
OFF 130°C±5°C
ON 90°C±20°C
Room
temperature
thermistor
Fan motor
(with Inner-
thermostat)
4-pole
OUTPUT 15W
CU-0206B-A
4-pole
OUTPUT 15W
CU-0206B-A
4-pole
OUTPUT 18W
CU-0207B-A
4-pole
OUTPUT 30W
CU-0303B-A
4-pole
OUTPUT 35W
CRC4415AB
4-pole
OUTPUT 50W
CU-0507B-A
Symbol
DC12V Stepping motor drive port
dimension 3.2
Ω (0~2000pulse)
EDM-402MD
TH23
Inner-
thermostat/
thermofuse
(Fan motor)
Liquid pipe
thermistor
Fan motor
capacitor
Linear
expansion valve
152°C °C
+5
0
FUSE
CUT OFF
3-2. Electrical parts specification

8
78
C
Remote controller (PAR-F25MA)can be built-in. (Program timer can not be built-in together)
ø6.35ø12.77307207601170
PFFY -P63VLEM-A PFFY -P40VLEM-A
1410 1000 960 970
960 970
ø15.88 ø9.52
ø15.88 ø9.52
Dimensions
310 108
170
160
Refrigeant piping flare connection(Liquid) F : HP
15
80
15
OD
ø
27(TOP
ø
20)
4 pcs.(attached)
Level adjusting screw
630
Air supply grille
Floor mounting hole
2-12 ✕16
Wall mounting hole
2 ✕2-12 ✕16
Piping
space
6
17025
183.5 21
106
B
170 300
( 75 ) 500
20
35
220
(60)40 120
B A
10
220220
10
Hose(accessory)
Strainer
Drain pan
Air filter
430
90
45
D
10001410
PFFY -P50VLEM-A PFFY -P32VLEM-A PFFY -P25VLEM-A
Model
ø6.35 ø6.35
ø12.7 ø12.7
730 610
720 600
760 640
1170 1050
F(Liquid)E(Gas)DCBA
Refrigerant piping flare connection(Gas) E : LP
35
50
100
Air outlet
Air inlet
PFFY -P20VLEM-A
ø6.35ø12.76106006401050
OUTLINES AND DIMENSIONS4
Indoor Unit
PFFY-P20·25·32·40·50·63VLEM-A Unit:mm

15
15
80
Duct mounting hole
2 ✕ F -
ø
4.7
9
400
167
310 90
A
132 15
Floor mounting hole
OD
ø
27(TOP
ø
20)
Hose(accessory)
Strainer
Drain pan
Air filter
Wall mounting hole
4 pcs.(attached)
Level adjusting screw
Refrigeant piping flare connection(Liquid) H : HP
Refrigerant piping flare connection(Gas) G : LP
H(Liquid)G(Gas)
ø6.35ø12.754807306927601006
Dimensions
Model
PFFY -P63VLRM
-A
PFFY -P40VLRM
-A
PFFY -P32VLRM
-A
PFFY -P25VLRM
-A
2 ✕ 2 - 12 ✕ 16
300170
( 75 )
2-12 ✕ 16
B
430
639
90
106
B
45
76 D
ø9.52 ø6.35 ø6.35
ø15.88
ø12.7 ø12.7
7 5 4
720 480 360
970 730 610
932 692 572
1000
760 640
1246
PFFY -P50VLRM
-A
ø9.52ø15.88772097093210001246
1006
886
FEDCBA
Duct mounting hole
2-
ø
4.7
898 30
49
10
220
35
50
100
84
29
C E
120
Air inlet
Air outlet
PFFY -P20VLRM
-A
ø6.35ø12.74360610572640
886
9
Indoor Unit
PFFY-P20·25·32·40·50·63VLRM-A Unit:mm

10
Switch(for voltage selection) Aux.relay
POWER SUPPLY ~ 220-240V 50Hz ~ 208-230V 60Hz
BREAKER(16A)
FUSE(16A)
PULL BOX
TO NEXT INDOOR UNIT
Switch (connection No.set) Switch (2nd digit address set) Thermistor (piping temp.detection/gas) Thermistor (piping temp.detection/liquid) Switch(for mode selection)
✻Capacitor
MODELS 20/25/32/40 1.5 F MODEL 50 2.0 F MODEL 63 2.5 F
TO OUTDOOR UNIT TO MA REMOTE CONTROLLER BC CONTROLLER REMOTE CONTROLLER
Switch(for model selection) Switch(for capacity code) Switch(for mode selection)
SW5(A.B)
X04~06
Surge absorber board
S.B
Transmission terminal bed
TB5
Transmission terminal bed
TB15
Power source terminal bed
TB2
Switch (1st digit address set)
Thermistor (inlet temp.detection)
Address board Indoor controller board ✻Capacitor (for MF) Fan motor
NAME SYMBOL
Electronic linear expan. valve Transformer Fuse AC250V 6.3A F
NAME SYMBOL
SYMBOL EXPLANATION
SW4(I.B)
SW14(A.B)
TH23
SW3(I.B) SW2(I.B)
SW1(A.B)
SW12(A.B) SW11(A.B)
TH22
TH21
LEV
T F
A.B
I.B
C
MF
C
TB5(TRANSMISSION TERMINAL BED)
TB15(TRANSMISSION TERMINAL BED)
TB2
1
2
3
4
5
6
7
8
0
8
7
6
5
4
3
2
1
0
9
1
2
3
4
5
6
7
8
9
0
9
A
B
C
D
E
F
PE
(White)
(White)
(Black)(White)
(White)(Red) (Black)
65
SW5 CN62
CN82
AC250V 6.3A F
( )
S.B
DSA1
CN1
1
3
ZNR1
123456 123456
21 31 21 31
T
2
ZNR
F
X06 X05 X04
413
2413
7
TH21
SW4
CN42
4
3
2
1
4321
78
TH23
21
CN29
SW11 (1st digit)
SW12 (2nd digit)
8
7
1
2
3
4
5
6
SW14 (Connection No.)
A.B
CN3T
31
M2
S(SHIELD)
M1
2
1
SW1
SW2
SW3
TH22
MF
LEV
N
L
625 1
4311
3222 533
1111654321
CN81 CN20 CN21 CN31 CN60 CNT CND FAN3
CN2M
I.B
1
2
CN3A
1
3
WIRING DIAGRAM5

11
Strainer (#100mesh)
Strainer (#100mesh)
Heat exchanger
Room temparature thermistor TH21
Gas pipe thermistor TH23
Liquid pipe thermistor TH22
Linear expansion valve
Gas pipe
Flare connection
Gas pipe
PFFY -P20,25,32,40VLEM-A
ø12.7<1/2F>
PFFY -P50,63VLEM-A
PFFY -P20,25,32,40VLRM-A PFFY -P50,63VLRM-A
ø15.88<5/8F>
Liquid pipe ø6.35<1/4F> ø9.52<3/8F>
Capacity
Item
REFRIGERANT SYSTEM DIAGRAM6

12
Room temparature
thermistor (TH21)
Liquid pipe thermistor
(TH22)
Gas pipe thermistor
(TH23)
Transformer
Fan motor
Linear expansion
valve
Disconnect the connector, then measure the resistance using a tester.
(Surrounding temperature 10°C~30°C)
Disconnect the connector and measure the resistance using a tester.
Measure the resistance between the terminals using a tester. (at 20°C)
Disconnect the connector then measure the resistance valve using a tester.
Refer to the next page for a detail.
Normal
4.3kΩ~9.6kΩAbnormal Open or short
CNT(1)-(3)
Normal
App.45 Ω
CN3T(1)-(3) App.1
Ω
Abnormal
Open or short
Normal
(1)-(5)
White-Red
150 Ω ±10%
Abnormal
Open or short
(2)-(6)
Yellow- Blown
(3)-(5)
Orange-Red
(4)-(6)
Blue-Brown
1
2
3
1
2
3
CNT T CN3T
Red Blue
Blue
White
1
2
3
4
5
6
LEV
White
Yellow
Orange
Blue
Red
Brown
CN60
Parts name Check points
1
Blue
Black
Red
White
Yellow
White
Relay connector
C
PFFY-P20~50
VLEM-A/VLRM-A
PFFY-P63
VLEM-A/VLRM-A
Motor terminal
or
Relay connector
Normal Abnormal
Open or short
Measure the resistance between the terminals using a tester. (at 20°C)
Motor terminal
or
Relay connector
Normal Abnormal
Open or short
3
4
2
1
1
Blue
Black
Red
White
Yellow
White
Relay connector
Protector
C
3
4
2
1
Black - White
Red - Yellow
Yellow - Blue
Blue - Black
335.0
P20,P25
174.0
56.8
99.6
Black - White
Red - Yellow
Yellow - Blue
Blue - Black
112.0
P63
78.0
12.7
50.8
294.0
P32
150.0
52.0
78.0
114.0
P40
80.0
30.0
42.0
101.4
P50
60.3
15.1
29.4
(Refer to the thermistor characteristic graph
on next page.)
7TROUBLE SHOOTING
7-1. How to check the parts

13
0
10
20
30
40
50
-20 -10 0 10 20 30 40 50
< Thermistor for lower temperature >
Temperature (:)
Resistance (k Ω)
4ø4
3
6
5
ø3
2ø2
1ø1
ø4
ø3
ø2
ø1
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 temparature thermistor(TH21)
Liquid pipe thermistor(TH22)
Gas pipe temparature thermistor(TH23)
Drain sensor(DS)
Thermistor R0=15kΩ±3%
Fixed number of B=3480kΩ±2%
Rt=15exp { 3480( ) }
0°C 15kΩ
10°C 9.6kΩ
20°C 6.3kΩ
25°C 5.2kΩ
30°C 4.3kΩ
40 3.0kΩ
Thermistor for
lower temperature
Linear expansion valve
1Operation summary of the linear expansion valve.
• Linear expansion valve open/close 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 expasion valve>
1
273+t
1
273

Output
(Phase)
Output
ø1
1
ON
ø2ON
ø3OFF
ø4OFF
2
OFF
ON
ON
OFF
3
OFF
OFF
ON
ON
4
ON
OFF
OFF
ON
<Output pulse signal and the valve operation>
➁Linear expansion valve operation
➂Trouble shooting
D
A
E
B
C
Open
Extra tightning (80~100pulse)
Pulse number
2000 pulse
Opening a valve
all the way
Close
Valve position (capacity)
6
5
4
3
2
1
LED1kΩ
Symptom Check points
Operation circuit fail-
ure of the micro
processor.
Disconnect the connector on the controller board, then con-
nect LED for checking.
Pulse signal will be sent out for 10 seconds as soon as the
main switch is turn on. If there is LED with lights on or lights
off, it means the operation circuit is abnormal.
Countermeasures
Exchange the indoor con-
troller board at drive circuit
failure.
Linear expansion
valve mechanism is
locked.
Valve doesn´t close
completely (thermis-
tor leaking).
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 out-
door multi controller board operation moni-
tor. During fan operation, linear expansion
valve is closed completely and if there are
some leaking, detecting temperature of the
thermistor will go lower. If the detected
temperature is much lower than the temper-
ature 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 making any trouble.
Thermistor
(TH21)
Linear
expansion
valve
Motor will idle and make ticking noise when motor is operated
while the linear expansion valve is locked. This ticking sound
is the sign of the abnormality.
Check the color of lead wire and missing terminal of the con-
nector.
Exchange the linear
expansion vale.
Exchange the linear
expansion valve.
If large amount of refriger-
ation is leaked, exchange
the linear expansion valve.
Disconnect the connector
at the controller board,
then check the continuity.
Measure the resistance between the each coil (red-white,
red-orange, brown-yellow, brown-blue) using a tester. It is
normal if the resistance is in the range of
Short or breakage of
the motor coil of the
linear expansion
valve.
Closing a valve : 1 →2 →3 →4 →1
Opening a valve : 4 →3 →2 →1 →4
The output pulse shifts in above order.
1. When linear expansion valve operation stops, all output phase
become OFF.
2. At phase interruption or when phase does not shift in order,
motor does not rotate smoothly and motor will locks and vibrates.
When the switch is turned on, 2200 pulse closing valve signal
will be send till it goes to A point in order to define the valve
position.
When the valve move smoothly, there is no noise or vibration
occurring from the linear expansion valve : however, when the
pulse number moves from E to A or when the valve is locked,
more noise can be heard than normal situation.
✻
✻
✻
Noise can be detected by placing the ear against the screw dri-
ver handle while putting the screw driver to the linear expansion
valve.
150Ω10%.
14

15
1
2
3
4
5
6
7
8
9
10
1~6
1
2
3
4
5
6
7
8
1~4
Thermistor<Intake temperature
detection>position
ON OFF
Filter crogging detection Provided Not provided
Filter life 2,500hr 100hr
Air intake Effective Not effective
Remote indication switching Thermostat ON signal indication Fan output indication
Humidifier control Always operated while the heat is ON Operated depends on the condition
Air flow st Low Extra low
Heat thermostat OFF Setting air flow Reset to SW1-7
Auto reset function Effective Not effective
Power ON/OFF Effective Not effective
Heat pump/Cool only Cooling only Heat pump
Louver Available Not available
Vane Available Not available
Vane swing function Available Not available
Vane holizontal angle Second setting First setting
Vane cooling limit angle setting Horizontal angle Down blow
Heating 4deg up Not effective Effective
ON
OFF
12345678
ON
OFF
12345678910
ON
OFF
123456
ON
OFF
123456
MODELS SW2 MODELS SW2 MODELS SW2
PFFY-
P20VLEM-A
PFFY-
P40VLEM-A
PFFY-
P25VLEM-A
PFFY-
P25VLRM-A
Address board
<At delivery>
Indoor controller board
Indoor controller board
Indoor controller board
<At delivery>
<At delivery>
SW4
Unit
Selection
SW3
Function
Selection
SW2
Capacity
code
setting
SW1
Mode
Selection
Switch Pole Function
Built-in remote controller Indoor unit
Set while the unit is off.
<At delivery>
Set for each capacity.
Set while the unit is off.
(Note) At cooling mode, each
angle can be used only 1
hour.
Set while the unit is off.
Operation by switch Remarks
ON
OFF
123456
PFFY-
P32VLEM-A
PFFY-
P40VLRM-A
PFFY-
P25VLRM-A
ON
OFF
123456
ON
OFF
123456
ON
OFF
123456
PFFY-
P20VLRM-A
PFFY-
P50VLEM-A
ON
OFF
123456
ON
OFF
123456
ON
OFF
123456
PFFY-
P63VLEM-A
PFFY
P32VLRM-A
PFFY
P63VLRM-A
ON
OFF
123456
ON
OFF
123456
ON
OFF
123456
Note :The DipSW setting is effective during unit stopping ( remote controller OFF ) for SW1,2,3 and 4 commonly and the
power source is not required to reset.
ON
OFF
123 4
7-2. Function of Dip-switch

16
3
2
1
SWC
1
2
3
(SWA)
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
3
2
1
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
Address board
Address board
Operation by switchSwitch Pole Remarks
✻As this switch is used by interlocking with
SWC,refer to the item of SWC for detail
<At delivery>
<At delivery>
<At delivery>
<At delivery>
1~3
SWA
Option
2
SWC
Option
SW11
1st digit
address
setting
SW12
2nd degit
address
setting
Rotary switch
SW14
Connect
ion No.
setting
Rotary switch
When attach the optional high perfor-
mance filter elements (filter casement)
to the unit, be sure to attach it to the
option side in order to prevent the air-
flow reducing.
Address setting should be done when network
remote controller (PAR-F25MA) is being used.
This is the switch to be used when the indoor
unit is operated with R2 series outdoor unit as
a set.
220V 240V
220V 240V
Address board
<At delivery>
2
SW5
Voltage
Selection
If the unit is used at the 230V or 240V area,
set the voltage to 240V.
If the unit is used at the 220V, set the voltage
to 220V.
Address can be set while the
unit is stopped.
Note:1
Note:1
Note:2
Note:2
Note:2
Note 1:The DipSW setting is effective always after powering ( remote controller ON ) for SWA and SWC.
2:The DipSW setting is effective during unit stopping ( remote controller OFF ) for SW11,12,14 and 5
(Option)
(Standard)
(Option)
(Standard)

(A)
(B)
Fig.1
Fig.2
Fig.3
(A)
DISASSEMBLY PROCEDURE8
8-1 CONTROL BOX (Exposed type PFFY-P·VLEM) Be careful removing heavy parts.
1.Removing the front panel (A)
(1)Remove the fixing screws(two) of the front
panel(A).(Fig.1)
(2)Hold the bottom of the front panel with your
hands,and gently lift it. The front panel should fall
down forward.(Fig.2)
2.Removing the control box cover (B)
(1)Remove the fixing screws(two) of the cover(B) and
remove the cover.(Fig.3)
17
OPERATING PROCEDURE PHOTOS

18
(D)
(C)
(E)
(F)
Fig.1
Fig.2
Fig.3
Fig.4
(A)
(B)
(B)
8-2 THERMISTOR (Gus and liquid piping temperature detection)
1.Removing the side casing
(1)Open the control panel cover(A), remove the fixing
screws(two) of the securing cover. (Fig. 1)
(2)Pull up the side casing(B). (Fig. 2)
OPERATING PROCEDURE PHOTOS
2.Removing the thermistor
(1)Remove the fixing screws (three), remove the
cover (C) and (D). (Fig. 3)
(2)Remove the thermistor (gas)(E) and the thermistor
(liquid)(F). (Fig. 4)

19
Be careful
Thermistor Fig.1
Fig.1
Fig.2
➀
OPERATING PROCEDURE PHOTOS
1.Removing the drainpan
(1)Remove the fixing screw of the side frame by the
control box. (Fig. 1)
(2)Slide the drainpan in the direction of the arrow ➀.
8-4 DRAINPAN
1.Removing the thermistor
(1)Remove the thermistor under the control box.
8-3 THERMISTOR (Intake air temperature detection)
PHOTOSOPERATING PROCEDURE