Mitsubishi Electric PLFY Series User manual

TECHNICAL & SERVICE MANUAL
SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS
Indoor unit
[Model names] [Service Ref.]
PLFY-P32VKM-A PLFY-P32VKM-A
PLFY-P40VKM-A PLFY-P40VKM-A
PLFY-P50VKM-A PLFY-P50VKM-A
PLFY-P63VKM-A PLFY-P63VKM-A
No. OC253
INDOOR UNIT
Ceiling Cassettes
Series PLFY
CONTENTS
1. SAFETY PRECAUTION···························3
2. PART NAMES AND FUNCTIONS···········5
3. SPECIFICATION······································7
4. OUTLINES AND DIMENSIONS···············9
5. WIRING DIAGRAM································10
6. REFRIGERANT SYSTEM DIAGRAM ·······11
7. TROUBLE SHOOTING··························12
8. DISASSEMBLY PROCEDURE··············17
9. PARTS LIST···········································20
10. OPTIONAL PARTS·················Back cover
R407C
2001
R22
OC253---1.qxp 2/14/01 9:51 AM Page 1
All manuals and user guides at all-guides.com
all-guides.com

OC253---1.qxp 2/14/01 9:51 AM Page 2
All manuals and user guides at all-guides.com

3
SAFETY PRECAUTION
1
Cautions for using with the outdoor unit which adopts R407C 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.
· Store the piping to be used during installation indoors with keep 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.
· Use ESTR , ETHER or HAB as the lubricant to coat flares and flange connection parts.
Use liquid refrigerant to seal 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.
OC253---1.qxp 2/14/01 9:51 AM Page 3
All manuals and user guides at all-guides.com

4
[3] Refrigerant recharging
(1) Refrigerant recharging process
1Direct charging from the cylinder.
·R407C cylinder are 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.
[1] 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] Notice on repair 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.
Gravimeter
Unit
OC253---1.qxp 2/14/01 9:51 AM Page 4
All manuals and user guides at all-guides.com

5
PART NAMES AND FUNCTIONS
2
● Remote controller
● Operation buttons
[PAR-20MAA]
● Once the controls are set, the same operation mode can
be repeated by simply pressing the ON/OFF button.
Auto Air Swing Vane
Disperses airflow up and
down and adjusts the angle
of airflow direction.
Grille
Filters
Remove dust and pollutants
from return air
Horizontal Air Outlet
Sets airflow horizontal automatically
during cooling or dehumidifying.
Air Intake
Returns air from room.
PAR-20MAA
ON/OFF
CENTRALLY CONTROLLED
ERROR CODE
CLOCK
ON OFF
˚C
CHECK
CHECK MODE
FILTER
TEST RUN
FUNCTION
˚C
1Hr.
NOT AVAILABLE
STAND BY
DEFROST
FILTER
CHECK TEST
TEMP.
TIMER SET
Press this button to switch the cooler,
electronic dry (dehumidify), automatic
and heater modes.
OPERATION SWITCH button
This sets the room temperature. The
temperature setting can be performed
in 1:units
Setting range
Cooler 19:to 30:
Heater 17:to 28:
TEMP. ADJUSTMENT button
This switches between continuous
operation and the timer operation.
TIMER button
This switches between the operation
and stop modes each time it is pressed.
The lamp on this button lights during
operation.
ON/OFF button
Only press this button to perform an
inspection check or test operation.
Do not use it for normal operation.
CHECK-TEST RUN button
This switch the horizontal fan motion
ON and OFF.
(Not available for this model.)
LOUVER button
This adjusts the vertical angle of the
ventilation.
AIR DIRECTION button
This resets the filter service indication
display
FILTER button
This sets the current time, start time
and stop time.
TIME SETTING button
This sets the ventilation fan speed.
AIR SPEED button
● Indoor (Main) Unit
OC253---1.qxp 2/14/01 9:51 AM Page 5
All manuals and user guides at all-guides.com

6
Caution
●Only the Power display lights when the unit is stopped and power supplied to the unit.
●When the central control remote control unit, which is sold separately, is used the ON-OFF button, operation switch button
and TEMP. adjustment button do not operate.
●“NOT AVAILABLE” is displayed when the Air speed button are pressed.This indicates that this room unit is not equipped
with the fan direction adjustment function and the louver function.
●When power is turned ON for the first time, it is normal that “H0” is displayed on the room temperature indication (For max.
2minutes). Please wait until this “H0” indication disappear then start the operation.
CENTRALLY
CONTROLLED display
This indicates when the unit is con-
trolled by optional features such as
central control type remote controller.
TIMER display
This indicates when the continuous
operation and time operation modes
are set.
It also display the time for the timer
operation at the same time as when
it is set.
OPERATION MODE display
This indicates the operation mode.
STANDBY display
The [STANDBY] symbol is only dis-
played from the time the heating
operation starts unit the heated air
begins to blow.
DEFROST display
This indicates when the defrost oper-
ation is performed.
CHECK display
This indicates when a malfunction
has occurred in the unit which should
be checked.
CLOCK display
The current time , start time and stop
time can be displayed in ten second
intervals by pressing the time switch
button. The start time or stop time is
always displayed during the timer
operation.
●Display
In this display example on the bot-
tom left, a condition where all dis-
play lamps light is shown for expla-
nation purposes although this differs
from actual operation.
Operation lamp
This lamp lights during operation,
goes off when the unit stops and
flashes when a malfunction occurs.
POWER display
This lamp lights when electricity is
supplied to the unit.
SET TEMPERATURE display
This displays the selected setting
temperature.
AIR DIRECTION display
This displays the air direction.
ROOM TEMPERATURE display
The temperature of the suction air
is displayed during operation. The
display range is 8°C to 39°C. The
display flashes 8°C when the actual
temperature is less than 8°C and
flashes 39°C when the actual tem-
perature is greater than 39°C.
display
This display lights in the check mode
or when a test operation is per-
formed.
CHECK MODE
TEST RUN
This lamp lights when the filter need
to be cleaned.
AIR SPEED display
The selected fan speed is displayed.
FILTER display
PAR-20MAA
ON/OFF
CENTRALLY CONTROLLED
ERROR CODE
CLOCK
ON OFF
˚C
CHECK
CHECK MODE
FILTER
TEST RUN
FUNCTION
˚C
1Hr.
NOT AVAILABLE
STAND BY
DEFROST
FILTER
CHECK TEST
TEMP.
TIMER SET
OC253---1.qxp 2/14/01 9:51 AM Page 6
All manuals and user guides at all-guides.com
all-guides.com

7
SPECIFICATION
3
3-1. Specification
Note 1. Rating conditions(JIS B 8616)
Cooling : Indoor : D.B. 27°C W.B. 19.0°C
outdoor : D.B. 35°C
Heating : Indoor : D.B. 20°C
outdoor : D.B. 7°C W.B. 6°C
Note 2. The number indicated in < > is just for the grill.
W3. Air flow and the noise level are indicated as High-Middium 1-Middium 2-Low.
Item
kW
kW
kW
kW
A
A
—
mm
mm
mm
—
—
k/min
Pa
kW
—
—
[mm(in.)
[mm(in.)
[mm
dB
kg
Cooling capacity
Power
Heat exchanger
Insulator
Air filter
Fan ✕No
Air flow W3
Pipe
dimensions
Unit drain pipe size
Noise level W3
Product weight
Exterior
(munsell symbol)
Fan motor
output
External
static pressure
Liquid
side
Gas
side
Heating capacity
F
a
n
Dimensions
Height
Width
Depth
Electric characteristic
Input
Cooling
Heating
Cooling
Heating
Current
PLFY-P32VKM-A PLFY-P40VKM-A PLFY-P50VKM-A PLFY-P63VKM-A
3.6
4.0
0.13
0.13
0.60
0.60
4.5
5.0
0.13
0.13
0.60
0.60
5.6
6.3
0.14
0.14
0.64
0.64
7.1
8.0
0.15
0.15
0.68
0.68
16-15-14-13
15-14.5-14-13
12.7(1/2")
6.35(1/4")
35-34-32.5-31
17-16-15-14
Unit : Galvanized sheets · Standard grills : ABS resin acrylic coating Munsell<0.70Y 8.59/0.97>
298<30>
660<760>
660<760>
Cross fin
Turbo fan ✕1
0
0.030
Polyethylene sheet
PP honey comb
O.D.32 (PVC pipe VP-25 connectable)
15.88(5/8")
9.52(3/8")
37-35.5-34-32 39-38-36.5-35
19<3.7> 20<3.7>
Single phase 220-230-240V 50Hz
Single phase 220V 60Hz
V·Hz
OC253---1.qxp 2/14/01 9:51 AM Page 7
All manuals and user guides at all-guides.com

Fan motor
(with Inner-thermostat)
8
3-2. Electrical parts specifications
Model
Parts
name
TH21 Resistance 0:/15k', 10:/9.6k', 20:/6.3k', 25:/5.2k', 30:/4.3k', 40:/3.0k'
TH22 Resistance 0:/15k', 10:/9.6k', 20:/6.3k', 25:/5.2k', 30:/4.3k', 40:/3.0k'
Gas pipe thermistor TH23 Resistance 0:/15k', 10:/9.6k', 20:/6.3k', 25:/5.2k', 30:/4.3k', 40:/3.0k'
Fuse FUSE 250V 6.3A
MF
Inner-thermostat
Fan motor capacitor C
Vane motor MV
Drain-up mechanism DP
Drain sensor DS
Linear expansion valve LEV
Electric heater H2 240V 28.8W
TB2 (L,N,;) 330V 30A
TB5 (M1,M2,S) 250V 20A
(Indoor controller board)
(with limit switch)
(Condensation proof)
Power supply terminal
block
Transmission terminal
block
OFF 125:±5:
ON 85:±20:
MC8 200V-240V
2.5/2W 5/6R.P.M
PCD-4N230ME
INPUT 17/15W 36R/Hr
Heater resistance 0:/6k', 10:/3.9k', 20:/2.6k', 25:/2.2k', 30:/1.8k', 40:/1.3k'
Room temperature
thermistor
Liquid pipe thermistor
DC12V Stepping motor drive port
dimension 3.2 '(0~2000pulse)
EDM-402ME
6-pole OUTPUT 30W
PA1-V30F
Symbol
2.5+x 400V
PLFY-P32VKM-A PLFY-P40VKM-A PLFY-P50VKM-A PLFY-P63VKM-A
TB15 (1,2) 250V 10A
MA remote controller
terminal block
OC253---1.qxp 2/14/01 9:51 AM Page 8
All manuals and user guides at all-guides.com

9
OUTLINES AND DIMENSIONS
4
PLFY-P32VKM-A
PLFY-P40VKM-A
PLFY-P50VKM-A
PLFY-P63VKM-A
Unit : mm
243
42
166
156
65
75 1
2
760
760
466
66
35 460
66 35
460 466
135
435
54 +3
-2
115
65~80
30 298
253
54+3
-2
Air intake hole
Optional high-efficiency filter
Drain pipe VP-25 connection
Control wire entry
Power line entry
Feeding hole (Drain pump)
Suspension bolt M10
or W3/8
Suspension bolt lower edge
Ceiling surface
Leave space of 10~15mm between the top surface of the unit and the ceiling slab
Refrigerant piping side
electric wire entry side Vane motor
Grille
Air outlet hole
Air outlet hole
Air intake hole
4-Auto vanes
Air intake grill
Intake grill opening/closing side
Ceiling hole
Suspension bolt pitch
13
68
660
660
117
117
640
117
117
186
77 507
Suspension bolt pitch
Ceiling hole
690~710 25~3525~35
690~710
25~35 25~35
Drain hole
Terminal block for transmission
Terminal block for
power supply
Terminal block for
MA remote controller
NOTE 1.The electrical parts box may be removed during servicing.
When connecting the power line and the control wire, provide enough length to the electric wires.
NOTE 2.When installing the optional high-efficiency filter, the dimension
between the transom and ceiling shall be more than 440mm. Also, when installing the optional fresh air intake casement or the multi-functional casement, the dimension between the transom and ceiling shall be more than 440mm. (The optional high-efficiency filter can also be installed.)
64
Models 12
Refrigerant pipe
(6.35mm dia)
flared connection
1/4F
Refrigerant pipe
(12.7mm dia)
flared connection
1/2F
PLFY-32VKM-A PLFY-40VKM-A
Refrigerant pipe
(9.52mm dia)
flared connection
3/8F
Refrigerant pipe
(15.88mm dia)
flared connection
5/8F
PLFY-P50VKM-A PLFY-P63VKM-A
OC253---1.qxp 2/14/01 10:53 AM Page 9
All manuals and user guides at all-guides.com

10
5WIRING DIAGRAM
PLFY-P32VKM-A, PLFY-P40VKM-A
PLFY-P50VKM-A, PLFY-P63VKM-A
OC253---1.qxp 2/14/01 9:51 AM Page 10
All manuals and user guides at all-guides.com