Mitsubishi Electric PLFY-P20VCM-E2.TH Operating manual

TECHNICAL & SERVICE MANUAL
Indoor unit
[Model names] [Service Ref.]
PLFY-P20VCM-E2.TH
PLFY-P25VCM-E2.TH
PLFY-P32VCM-E2.TH
PLFY-P40VCM-E2.TH
INDOOR UNIT
CONTENTS
1. SAFETY PRECAUTION..........................2
2. PART NAMES AND FUNCTIONS..........6
3. SPECIFICATIONS...................................9
4. 4-WAY AIR FLOW SYSTEM.................11
5. OUTLINES AND DIMENSIONS............13
6. WIRING DIAGRAM...............................14
7. REFRIGERANT SYSTEM DIAGRAM...... 15
8. TROUBLESHOOTING..........................16
9. DISASSEMBLY PROCEDURE............. 23
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
R407C R22
R410A
Model name
indication
No.OCH463
PLFY-P20VCM-E2
PLFY-P25VCM-E2
PLFY-P32VCM-E2
PLFY-P40VCM-E2
May 2009
Note :
• This manual describes
only service data of the
indoor units.
• RoHS compliant products
have <G> mark on spec
name plate.
PARTS CATALOG (OCB463)

2
1SAFETY PRECAUTION
[1] Cautions for service
· After recovering the all 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
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.
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.

33
[3] Service tools
Use the below service tools as exclusive tools for R407C refrigerant.
No. Tool name Specifications
1Gauge manifold · Only for R407C
· Use the existing fitting SPECIFICATIONS. (UNF7/16)
· Use high-tension side pressure of 3.43MPa·G or over.
2Charge hose · Only for R407C
· Use pressure performance of 5.10MPa·G or over.
3Electronic scale
4Gas leak detector · Use the detector for R134a or R407C.
5Adapter for reverse flow check · Attach on vacuum pump.
6Refrigerant charge base
7Refrigerant cylinder · For R407C · Top of cylinder (Brown)
· Cylinder with syphon
8Refrigerant recovery equipment
[2] Refrigerant recharging
(1) Refrigerant recharging process
1Direct charging from the cylinder
·R407C cylinder which is 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 all the 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

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 standing 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.
5Adapter for reverse flow check · Attach on vacuum pump.
6Refrigerant charge base
7Refrigerant cylinder · Only for R410A · Top of cylinder (Pink)
· Cylinder with syphon
8Refrigerant recovery equipment

6
Auto Air Swing Vane
Disperses airflow up and
down and adjusts the angle
of airflow direction.
Grille
Filter
Remove dust and pollutants
from inhaled air.
Horizontal Air Outlet
Sets horizontal airflow automatically
during cooling or dehumidifying.
Air Intake
Inhales air from room.
2PART NAMES AND FUNCTIONS
Indoor Unit
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
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
Built-in temperature sensor
Wired remote controller
Once the controllers are set, the same operation mode can be repeated by simply pressing the ON/OFF button.

77
Wired remote controller
●
°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
●
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.
“NOTAVAILABLE” 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.
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
Shows the direction 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.
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,
when the airflow direction also
changes.

8
Wireless remote controller
ON/OFF TEMP
FAN
VANE
TEST RUN
AUTO STOP
AUTO START
h
min
LOUVER
MODE
CHECK
RESETSET CLOCK
MODEL SELECT
NOTAVAILABLE
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.

9
3-1. SPECIFICATIONS
3SPECIFICATIONS
1 Nominal cooling condition
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 condition
27˚CDB/19.5˚CWB (81˚FDB/67˚FWB)
35˚CDB (95˚FDB)
5m (16-3/8 ft)
0m (0 ft)
3 Nominal heating condition 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 = kW × 860
Btu/h = kW × 3,412
cfm = m3/min x 35.31
lb = kg / 0.4536
Model
Power source
Cooling capacity
(Nominal)
Heating capacity
(Nominal )
External finish
External dimension H x W x D
Net weight
Decoration panel
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
Remark
Power input
Current input
Power input
Current input
Model
External finish
Dimension
H × W × D
Net Weight
Cord heater
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)
mm
in.
kg (lb)
kW
kW
m3/ min
L / s
cfm
dB <A>
mm (in.)
mm (in.)
mm (in.)
1
1
1
2
3
3
3
PLFY-P20VCM-E2
Single phase 220-230-240V 50Hz
Unit: Galvanized sheets with grey heat insulation
White Munsell(6.4Y 8.9/0.4)
Cross fin (Aluminum fin and copper tube)
Turbo fan × 1
Single phase induction motor
Direct-driven by motor
Polyethylene foam
PP honeycomb fabric (long life type)
Fuse
LEV
R410A, R407C, R22 CITY MULTI
Installation manual, Instruction book
Drain hose I.D. 32mm (1-1/4"), Wireless junction cable
Decoration panel : SLP-2AAW or SLP-2ALW
*PLFY-P-VCM-E2 should use together with Decoration panel.
2.2
1,900
7,500
2,000
0.05
0.23
2.5
2,200
8,500
0.05
0.23
208 × 570 × 570
8-1/4" × 22-1/2" × 22-1/2"
15.5 (35)
SLP-2AAW or SLP-2ALW
20 × 650 × 650
13/16" × 25-5/8" × 25-5/8"
3 (7)
0.015
0Pa (0mmH2O)
0.011
8-9-10
133-150-167
283-318-353
28-31-35
ø6.35 (ø1/4") Flare
ø12.7 (ø1/2") Flare
PLFY-P25VCM-E2
2.8
2,400
9,600
2,500
0.05
0.23
3.2
2,800
10,900
0.05
0.23
208 × 570 × 570
8-1/4" × 22-1/2" × 22-1/2"
15.5 (35)
20 × 650 × 650
13/16" × 25-5/8" × 25-5/8"
3 (7)
0.015
0Pa (0mmH2O)
0.015
8-9-10
133-150-167
283-318-353
29-31-37
ø6.35 (ø1/4") Flare
ø12.7 (ø1/2") Flare
PLFY-P32VCM-E2
3.6
3,100
12,300
3,150
0.06
0.28
4.0
3,400
13,600
0.06
0.28
208 × 570 × 570
8-1/4" × 22-1/2" × 22-1/2"
17 (38)
20 × 650 × 650
13/16" × 25-5/8" × 25-5/8"
3 (7)
0.015
0Pa (0mmH2O)
0.02
8-9-11
133-150-183
283-318-388
29-33-38
ø6.35 (ø1/4") Flare
ø12.7 (ø1/2") Flare
PLFY-P40VCM-E2
4.5
3,900
15,400
4,000
0.06
0.28
5.0
4,300
17,100
0.06
0.28
208 × 570 × 570
8-1/4" × 22-1/2" × 22-1/2"
17 (38)
20 × 650 × 650
13/16" × 25-5/8" × 25-5/8"
3 (7)
0.015
0Pa (0mmH2O)
0.02
8-9-11
133-150-183
283-318-388
30-34-39
ø6.35 (ø1/4") Flare
ø12.7 (ø1/2") Flare
Details on foundation work, duct work, insulation work, electrical wiring, power source switch, and other items shall be referred to
the Installation Manual.
O.D. 32mm (1-1/4") (PVC pipe VP-25 connectable)
SLP-2AAW or SLP-2ALW SLP-2AAW or SLP-2ALW SLP-2AAW or SLP-2ALW

10
3-2. ELECTRICAL PARTS SPECIFICATIONS
Parts name
Model Symbol
TH21
TH22
TH23
FUSE
MF
C
MV
DP
DS
LEV
H2
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 6.3A
240V 15W
(L, N, ) Rated to 330V 30A +
(M1, M2, S) Rated to 250V 20A +
(1, 2) Rated to 250V 10A +
PLFY-P25VCM-E2.THPLFY-P20VCM-E2.TH PLFY-P32VCM-E2.TH PLFY-P40VCM-E2.TH
Thermistor
(Room temperature
detection)
Thermistor
(Pipe temperature
detection/ Liquid)
Thermistor
(Pipe temperature
detection/ Gas)
Fuse
(Indoor controller board)
Fan motor
(with Thermal fuse) Thermal fuse
Electric heater
(Condensation proof)
Power supply terminal
block
Transmission terminal
block
MA remote controller
terminal block
6-pole OUTPUT 15W
PK6V15-LD
6-pole OUTPUT 11W
PK6V11-LF 6-pole OUTPUT 20W PK6V20-LM
6-pole OUTPUT 20W
PK6V20-LL
MSBPC20M13
DC12V 300
 /phase
PLD-12230ME-1
INPUT 12/10.8W 241/Hr
Thermistor resistance 0/6k, 10/3.9k, 20/2.6k, 25/2.2k, 30/1.8k, 40/1.3k
DC12V Stepping motor drive, Port dimension :5.2 (0~2000pulse)
EDM-40YGME
OFF 145$2
1.5× 440V1.0× 440V
Fan motor capacitor
Vane motor
Drain pump
Drain sensor
Linear expansion valve
[coil]
+Note: Refer to WIRING DIAGRAM for the supplied voltage.

1111
4 4-WAY AIR FLOW SYSTEM
4-1. FRESH AIR INTAKE (Location for installation)
At the time of installation, use the duct holes (cut out) located at the positions shown in following diagram, as and when required.
Detail drawing of fresh air intake
Ceiling surface
Refrigerant pipe Drain pipe
Electrical Box
Cut out hole
:73.4
Burring hole
3-:2.8 hole
:100
118
25
120°
120°
Fresh air intake
Static pressure : P [Pa] Air flow : Q [m3/min]
50
-50
-100
-150
-200
-250
-300
00.5 1.0 1.5 2.0 2.5 3.0 3.5
PLFY-P20VCM-E2.TH
PLFY-P25VCM-E2.TH
PLFY-P32VCM-E2.TH
PLFY-P40VCM-E2.TH
Taking air into the unit
4-2. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS
Q
0
BA
C
1Curve in the
left graphs
Duct characteristics
at site
Q
A
EC
2
Q
Qa
AD
3
How to read curves
NOTE: Fresh air intake amount should be 20% or less of
whole air amount to prevent dew dripping.
4-3. OPERATION IN CONJUNCTION
WITH DUCT FAN (Booster fan)
• Whenever the indoor unit operates, the duct fun also
operates.
(1)Connect the optional multiple remote controller
adapter(PAC-SA88HA-E) to the connector CN51
on the indoor controller board.
(2)Drive the relay after connecting the 12V DC relay
between the Yellow and Orange connector wires.
MB: Electromagnetic switch power relay for duct fan.
X: Auxiliary relay (For DC 12V, coil rating : 1.0W or
below)
CN51
Multiple remote
controller adapter
PAC-SA88HA-E
Indoor controller board
Distance between indoor
controller board and relay
must be within 10m.
Be sure to secure insulation
material by tape, etc.
5Green
Yellow
Orange
Connector (5P)
Indoor unit side Multiple remote
controller adapter
PAC-SA88HA-E Be sure to secure insulation
material by tape, etc.
Installation at site
CN51
on indoor
controller board
Red
Brown
1
~
CN51
MB
Q…Designed amount of fresh air intake
<m3/min>
A…Static pressure loss of fresh air
intake duct system with air flow
amount Q <Pa>
B…Forced static pressure at air condi-
tioner inlet with air flow amount Q
<Pa>
C…Static pressure of booster fan with
air flow amount Q <Pa>
D…Static pressure loss increase
amount of fresh air intake duct sys-
tem for air flow amount Q <Pa>
E…Static pressure of indoor unit with
air flow amount Q <Pa>
Qa…Estimated amount of fresh air
intake without D <m3/min>

12
4-4. FIXING HORIZONTAL VANE
Horizontal vane of each air outlet can be fixed according to the environment where it is installed.
Setting procedure
1) Turn off a main power supply (Turn off a breaker).
2) Disconnect the vane motor connector of the direction of the arrow with pressing the unlocking button as shown in figure
below.
Insulate the disconnected connector with the plastic tape.
Vane motor
Horizontal vane
Connector Unlocking button
Vane motor
3) Set a vertical vane of the air outlet, which is to be fixed by the hand slowly within the range in the table below.
Measured standard posi-
tion of the grille
Horizontal vane
Standard of
horizontal position
Dimension A (mm) 21 25 28 30
Level 30°
(Min.) Downward 45° Downward 55° Downward 70° (Max.)
+Dimension between 21 mm and 30 mm can be arbitrarily set.
Caution Do not set the dimension out of the range.
Erroneous setting could cause dew drips, smudge on ceiling or malfunction of unit.
<Set range>


1313
5OUTLINES AND DIMENSIONS
PLFY-P20VCM-E2.TH PLFY-P25VCM-E2.TH
PLFY-P32VCM-E2.TH PLFY-P40VCM-E2.TH
Brand label
15~37 15~37576~620
530
1
2
Grille
Fresh air intake
Drain pipe
VP-25 connection
Vane motor
Drain hole
V/M
V/M
V/M
V/M
Air intake grille
55 35
35 55
Auto vane
Grille
Air intake hole
Air intake hole
Air outlet hole
Air outlet hole
301
301
Detail drawing of fresh air intake
Ceiling surface
Cut out hole
:73.4
Burring hole
3-:2.8
:100
118
25
120
120
377
377
650
650
Suspension bolt M10 or W3/8
230
18248
Terminal block Ceiling surface
235
208
27 +5
0
193
20
93
38~58
66121
17 202
87
31
Ceiling hole
15~37
576~620
420 570 335
199
352335 Ceiling hole
Grille
Drain pipe
VP-25 connection
(O.D.:32)
Drain hole
55 35
35 55
Auto vane
Grille
Air intake hole
Air outlet hole
301
Detail drawing of fresh air intake
Ceiling surface
Cut out hole
Burring hole
118
25
377
377
650
18248
Terminal block
235
208
27 +5 193
20
93
66121
87
31
15~37
570 335
199
352335
570
Grille
Drain pipe
Drain hole
55 35
35 55
Auto vane
Grille
Air intake hole
Air outlet hole
301
Detail drawing of fresh air intake
Ceiling surface
Cut out hole
Burring hole
118
25
377
650
Suspension bolt lower edge
18248
Wiring entry
Terminal block
235
208
27 +5 193
20
93
66121
56 57
87
31
Suspension bolt pitch
570 335
199
352335
Suspension bolt pitch
Models 
PLFY-P20VCM-E2
PLFY-P25VCM-E2
PLFY-P32VCM-E2
PLFY-P40VCM-E2
Refrigetant pipe
(6.35mm dia.)
flared connection
1/4 inch
Refrigetant pipe
(12.7mm dia.)
flared connection
1/2 inch

14
WIRING DIAGRAM6
PLFY-P20VCM-E2.TH PLFY-P25VCM-E2.TH
PLFY-P32VCM-E2.TH PLFY-P40VCM-E2.TH

15
7 REFRIGERANT SYSTEM DIAGRAM
Strainer (#50mesh)
Strainer (#100mesh)
Unit : mm(inch)
Strainer1 (#50mesh)
Strainer2 (#100mesh)
Heat exchanger
Thermistor (Room temparature detection) TH21
Thermistor (Pipe temperature detection/ Gas) TH23
Thermistor (Pipe
temperature
detection/ Liquid) TH22
Linear expansion valve
Gas pipe
Liquid pipe
Flare connection
Gas pipe
Liquid pipe
:12.7(1/2)
:6.35(1/4)
PLFY-P20VCM-E2.TH PLFY-P25VCM-E2.TH
PLFY-P32VCM-E2.TH PLFY-P40VCM-E2.TH

16
8TROUBLESHOOTING
8-1. HOW TO CHECK THE PARTS
PLFY-P20VCM-E2.TH PLFY-P25VCM-E2.TH
PLFY-P32VCM-E2.TH PLFY-P40VCM-E2.TH
Parts name Check points
Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 10~30)
Disconnect the connector then measure the valve resistance with a tester.
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20~30)
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20~30)
Measure the resistance after 3 minutes have passed since the power supply was intercepted.
(At the ambient temperature 0~60)
Vane motor (MV)
Linear expansion
valve (LEV)
Drain pump (DP)
Drain sensor (DS)
Refer to the next page for the details.
Refer to the next page for the details.
Thermistor (TH21)
(Room temperature
detection)
Thermistor (TH22)
(Pipe temperature
detection/ Liqid)
Thermistor (TH23)
(Pipe temperature
detection/ Gas)
1
3
Yellow
Relay
connector
Yellow
1
2
3
Normal
4.3k~9.6k
Abnormal
Open or short
Abnormal
Open or short
Normal
0.6k~6.0k
Abnormal
Open or short
Normal
200$10%
White-Red Yellow-Brown Orange-Red Blue-Brown
NormalConnector Abnormal
300Open or short
Normal Abnormal
290Open or short
Orange
Red
White
Blue
Brown
Yellow
M
Orange
Red
White
Red — Yellow
Red — Blue
Red — Orange
Red — White
Blue Yellow
Fan motor (MF)
M
Refer to the next
page for the details.
BLK RED ORNYLW
BLU BRN WHT
P
Measure the resistance between the terminals with a tester.
(Coil wiring temperature 10°C ~ 30°C)
Normal
WHT-BLK
BLK-BLU
BLU-YLW
YLW-RED
RED-BRN
390~423
82~90
28~32
158~172
378~409
157~170
44~49
306~332
312~338
137~149
44~49
296~321
302~327
91~100
38~42
265~288
Abnormal
Opened or
short-circuited
#: Thermal fuse 145°C±2°C
PLFY-P20VCM-E2 PLFY-P25VCM-E2 PLFY-P32VCM-E2 PLFY-P40VCM-E2

1717
<Thermistor characteristic graph>
Thermistor (TH21)
(Room temperature detection)
Thermistor (TH22)
(Pipe temperature detection/ Liquid)
Thermistor (TH23)
(Pipe temperature detection/ Gas)
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 R0=6.0k' ±5%
Fixed number of B=3390 ±2%
Rt=6exp { 3390( ) }
0:6.0k'
10:3.9k'
20:2.6k'
25:2.2k'
30:1.8k'
40:1.3k'
60:0.6k'
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
:4
:3
:3:2
:2
:1
: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
1Operation summary of the linear expansion valve
• Linear expansion valves open/close through the use of a stepping motor after receiving the pulse signal from the indoor
controller board.
• Valve position can be changed in proportion to the number of pulse signals.
<Connection between the indoor controller board and the linear expansion valve>
Note : Since the number of the connector at the controller board side and the relay connector are different, follow the color of
the lead wire.
1
273+t 1
273
-20 0 20 40 60 80
< Thermistor for drain sensor >
Temperature ()
0
1
2
3
4
5
6
7
8
9
10
Resistance (k)
Linear expansion valve
Thermistor for
lower temperature
1
273+t 1
273
Thermistor for
drain sensor

18
Output
(Phase)
Output
{11
ON
{2ON
{3 OFF
{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
3Troubleshooting
D
A
E
B
C
Open
Extra tightening (200~800pulse)
Pulse number
Close
Open
Outdoor unit R410A model : 1400 pulse
Outdoor unit R22/R407C model : 2000 pulse
Opening a valve
all the way
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
send till it goes to point Ain order to define the valve position.
• When the valve moves smoothly, there is no sound or vibration
occurring from the linear expansion valves : however, when the
pulse number moves from Eto Aor when the valve is locked, more
sound can be heard than in a normal situation.
• Sound 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 at 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) with 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

19
Switch Function Remarks
Effective
timing
Under
suspension
Under
suspension
Before
power
supply
ON
Before
power
supply
ON
<Initial setting>
ON
OFF 123456789
10
Operation by switch
ON OFF
Pole
Built-in remote controller
Provided
2,500h
Effective
Thermo ON signal indication
Fan operation at Heating mode
Low +3
Setting air flow +3
Effective
Effective
Filter clogging detection
Filter cleaning
Fresh air intake
Remote indication switching
Humidifier control
Air flow set in case of
Heat thermo OFF
Auto restart function
Power ON/OFF
Indoor unit
Not provided
100h
Not effective
Fan output indication
Thermo ON operation at heating mode
Extra low +3
Depends on SW1-7
Not effective
Not effective
Cooling only
Available
Available
Available
Second setting
+6
Horizontal angle
Effective
Not effective
—
—
Heat pump / Cooling only
Louver
Vane
Vane swing function
Vane horizontal angle
Vane cooling limit angle setting +4
Heat 4degrees up
Superheat setting temperature +5
Sub cool setting temperature +5
Heat pump
Not available
Not available
Not available
First setting
Down A, B, C
Not effective
Effective
—
—
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
SW2
Capacity
code
setting 1~6
1~5
SW3
Function
setting
Thermistor <Room temperature
detection> position
<Initial setting>
ON
OFF 123456789
10
Indoor controller board
Indoor controller board
<Initial setting>
Set while the unit is off.
Set for each capacity.
Indoor controller board
Indoor controller board
ON
OFF 12345
Capacity
P20 P32
P25 P40
SW 2 Capacity SW 2
ON
OFF
123456
ON
OFF
123456
ON
OFF
123456
ON
OFF
123456
SW1
Function
Selection
SW4
Unit
Selection
Indoor linear expansion
valve opening
In case of replacing the indoor controller board, make sure to set the switch to
the initial setting, which is shown below.
SW 1-7
OFF
ON
OFF
ON
SW 1-8
OFF
OFF
ON
ON
Extra low
Low
Setting air flow
stop
+
Note :
+4 At cooling mode, each angle
can be used only 1 hour.
+5Do not use SW3-9, 10 as
trouble might be caused by
the usage condition.
+6 Second setting is same as
first setting.
8-2. FUNCTION OF DIP SWITCH

20
0
5
9
4
8
3
7
2
6
1
0
5
9
4
8
3
7
2
6
1
0
5
9
4
8
3
7
2
6
1
0
5
9
4
8
3
7
2
6
1
0
8
F
7
E
6
D
5
C
4
B
3
A
2
9
1
0
8
F
7
E
6
D
5
C
4
B
3
A
2
9
1
Rotary switchRotary switch
SW14
Connection
No.
setting
SW11
1s digit
address
setting
SW12
10ths digit
address
setting
Pole Operation by switch
Address setting should be done when M-NET
remote controller is being used.
This is the switch to be used when the indoor
unit is operated with R2 series outdoor unit
as a set.
Remarks
<Initial setting>
SW12
10
SW11
1
SW12 SW11
SW14
SW14
<Initial setting>
Effective
timing
Before
power
supply
ON Indoor controller board
Indoor controller board
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.
Under
operation
or
suspension