Mitsubishi Electric PLFY-P80VAM User manual

TECHNICAL & SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
Indoor unit
[Model names] [Service Ref.]
PLFY-P80VAM PLFY-P80VAM.UK
PLFY-P100VAM PLFY-P100VAM.UK
PLFY-P125VAM PLFY-P125VAM.UK
No. OC213
INDOOR UNIT
Ceiling Cassettes
Series PLFY
CONTENTS
1. SAFETY PRECAUTION························3
2. PART NAMES AND FUNCTIONS·········5
3. SPECIFICATION ···································7
4. 4-WAY AIR FLOW SYSTEM ·················8
5. OUTLINES AND DIMENSIONS··········12
6. WIRING DIAGRAM ·····························13
7. REFRIGERANT SYSTEM DIAGRAM ····14
8. TROUBLE SHOOTING ·······················15
9. DISASSEMBLY PROCEDURE ···········20
10. PARTS LIST ········································23
11. OPTIONAL PARTS ·····························26
R407C R22
No. OC213
OC213--1.qxp 8/30/00 5:39 PM Page 1

OC213--1.qxp 8/30/00 5:39 PM Page 2

3
SAFETY PRECAUTION
1
Cautions for devices that use R407C refrigerant.
· Do not use the existing refrigerant piping.
-The old refrigerant and lubricating oil in the existing piping contains a large amount of chlorine which may cause the lubricating
oil of the new unit to deteriorate.
· 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 lubricating oil will
result.
· 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 Suniso 4GS or 3GS (small amount) as the lubricating oil to coat flares and flange connection parts.
-The lubricating oil used with the air conditioner is highly hygroscopic. If it is used, water may be mixed in and deterioration
of the lubricating oil may result.
· Use liquid refrigerant to charge the system.
-If gas refrigerant is used to charge the system, the composition of the refrigerant in the cylinder will change and perfor-
mance 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 lubricating 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 lubricating oil to deteriorate.
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4
[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 35kgf/cm2or over.
2Charge hose ·Only for R407C.
·Use pressure performance of 52kgf/cm2or 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 all the refrigerant in the unit, work may be started.
·Do not release the refrigerant in the air.
·After completing the repair service, recharge the system with the specified amount of the
liquid refrigerant.
[3] Refrigerant recharging
(1) Refrigerant recharging process
Direct charging from the cylinder.
·Confirm that the cylinder is suitable for syphoning.
·Raise the cylinder and recharge the unit by syphoning liquid refrigerant.
(2) Recharge when refrigerant leakage has occurred.
·After recovering all the refrigerant in the unit, work may be started.
·Do not release the refrigerant in the air.
·After completing the repair service, recharge the system with the specified amount of
the liquid refrigerant.
Gravimeter
Unit
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5
PART NAMES AND FUNCTIONS
2
● Indoor (Main) Unit
● Remote controller
● Operation buttons
[PAR-F25MA]
● Once the controls are set, the same operation mode can
be repeated by simply pressing the ON/OFF button.
Press this button to switch the cooling,
electronic dry (dehumidify), automatic
and heating modes.
OPERATION SWITCH button
This sets the room temperature. The
temperature setting can be performed
in 1:units
Setting range
Cooling 19:to 30:
Heating 17:to 28:
TEMPERATURE 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 switches the horizontal fan motion
ON and OFF.
(This button does not operate on 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
Auto Air Swing Vane
Disperses airflow up and
down and adjusts the angle
of airflow direction.
Grille
Filter
Removes dust and pollutants
from intake air
Horizontal Air Outlet
Sets airflow to horizontal automatically
during cooling or dehumidifying.
Air Intake
Intakes air from room.
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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 TEMPERATURE 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 until 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 setting
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.
FAN SPEED display
ROOM TEMPERATURE display
The temperature of the suction air is
displayed during operation. The dis-
play range is 8° to 39°C. The display
flashes 8°C when the actual temper-
ature is less than 8° and flashes
39°C when the actual temperature is
greater than 39°C.
display
This display lights in the check mode
or when a test operation is per-
formed.
CHECK MODE
TEST RUN
FILTER display
This lamp lights when the filter needs
to be cleaned.
AIR DIRECTION display
The selected fan speed is displayed.
This displays the air direction.
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7
SPECIFICATION
3
3-1. Specification
Note 1. Rating conditions(JIS B 8615)
Cooling : Indoor : D.B. 27°C W.B. 19.5°C
outdoor : D.B. 35°C
Heating : Indoor : D.B. 21°C
outdoor : D.B. 7°C W.B. 6°C
Note 2. The number indicated in < > is just for the grille.
Note 3. Air flow and the noise level are indicated as High-Middium 1-Middium 2-Low.
Item
V·Hz
kcal/h
BTU/h
kW
kcal/h
BTU/h
kW
kW
kW
A
A
%
%
mm
mm
mm
k/min
Pa
kW
[mm
[mm
[mm
dB
kg
Cooling capacity
Power
Heat exchanger
Insulator
Air filter
Fan ✕No
Air flow #3
Pipe
dimensions
Drain pipe size
Noise level
Exterior
(munsell symbol)
Fan motor
output
External
static pressure
Liquid
side
Gas
side
Heating capacity
F
a
n
Dimensions
<Grille>
Height
Width
Depth
Electric characteristic
Power
supply
input
Cooling
Heating
Cooling
Heating
Cooling
Heating
Rated
current
Power
factor
PLFY-P80VAM.UK PLFY-P100VAM.UK PLFY-P125VAM.UK
Single phase 220V-240V 50 Hz
8,000
31,800
9.3
9,000
35,800
10.5
0.18
0.18
0.86
0.86
95 - 87
95 - 87
10,000
39,600
11.6
11,200
44,500
13.0
0.30
0.30
1.43
1.43
95 - 87
95 - 87
12,500
49.700
14.5
14,000
55,600
16.3
0.34
0.34
1.64
1.64
94 - 86
94 - 86
30-28-25-22
43-41-38-35
30<5>
-Unit : Galvanized sheets with gray heat insulation · Grille : ABS resin Munsell<0.70Y 8.59/0.97>
840<950>
840<950>
Cross fin
Turbo fan ✕1
28-26-23-20
0
Polyethylene sheet
PP honey comb fabric (long life)
O.D.32 (PVC pipe O.D.32 connectable)
41-39-36-33
30<5>
258<30>
22-20-18-16
0.070
15.88(5/8")
9.52(3/8")
37-35-32-30
24<5>
298<30>
0.120
19.05(3/4")
9.52(3/8")
Product weight
<Grille>
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8
3-2. Electrical parts specifications
Parts name
Model Symbol
TH21
TH22
TH23
FUSE
MF
C1
MV
DP
DS
LEV
H2
TB2
TB5
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 21.8W
(L, N, ;) 330V 30A
(M1, M2, S) 250V 30A
Liquid pipe thermistor
Gas pipe thermistor
Fan motor capacitor
Vane motor
Drain-up mechanism
Drain sensor
Linear expansion valve
PLFY-P80VAM.UK PLFY-P100VAM.UK PLFY-P125VAM.UK
Room temperature
thermistor
Fuse
(Indoor controller board)
Fan motor
(with inner-thermostat)
Inner-thermostat
(Fan motor)
Electric heater
(Condensation proof)
Power supply terminal
block
Transmission terminal
block
6-pole OUTPUT 120W
D176P120MS
6-pole OUTPUT 70W
D17B6P70MS
MSBPC20M04
DC12V 300
" /phase
PLD-12230ME-1
INPUT 12/10.8W 24R/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-804ME
OFF 130:i5:
ON 90:i20:
3.5+440V 7.0+440V
44-WAY AIR FLOW SYSTEM
4-1. Placement of the air outlets
For this grille, the discharge direction comes in 11 patterns.
Also, by setting the dip switches (SWA and SWB) on the indoor board to the appropriate settings, you can adjust the air flow
and speed. Select the settings from the Table below according to the location in which you want to install the unit.
1) Decide on the pattern of the airflow direction.
Discharge direction
pattern
4-direction<Table 1> 3-direction 2-direction Note :
For 3 and 2-directional,
please use the air outlet
shutter plate (option).
Pattern 1 Factory setting Pattern 4 One air outlet
fully closed Pattern 6 Two air outlets fully closed
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9
4-2. Fresh air intake (Location for installation)
At the time of installation, use the duct holes (cutout) located at the positions shown in following diagram, as and when required.
Note :
Be sure to add 135mm to the dimensions in the diagram that are marked with a “w” if installing a multi function casement
(Option)
A.B
SW5240V220V SWA
3
2
1
SWB
2
3
41
2
3
4
(RED)
ADDRESS
CN43
(RED)
ADDRESS
CN82
1
Standard
2.7m
3.0m
3.3m
2
High ceiling 1
3.0m
3.3m
3.5m
3
High ceiling 2
3.5m
3.5m
—
1
2
3
4
5
6
7
8
CONNECTION
No.
SW14
0
SWC
SW1
87654321
OFF
ON
10 9
00 SW11
SW12
1ST.DIGIT2ND.DIGIT
3RD.DIGIT
4 direction
3 direction
2 direction
SWA
SWB
PLFY-P80VAM.UK
PLFY-P100VAM.UK
PLFY-P125VAM.UK
4
3
2
1
Standard
3.2m
3.6m
4.0m
2
High ceiling 1
3.6m
4.0m
4.2m
3
High ceiling 2
4.2m
4.2m
—
4 direction
3 direction
2 direction
SWA
SWB
4
3
2
2) According to the number of air outlets and height of the ceiling to install the unit, be sure to set the switches
(SWA, SWB) on the indoor board to the appropriate setting.
Correspondence of ceiling heights to numbers of air outlets.
Fresh air intake hole
Fresh air intake hole diagram
3 - {2.8
Burring hole {125
Burring hole pitch
{100
(Cut out hole)
Refrigerant pipe Drain pipe Ceiling surface
120_
120_
w158
4-3. Interlocking operation method with
duct fan (Booster fan)
Whenever the indoor unit is operating, 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 lines.
(w)Use a relay under 1W.
MB: Electromagnetic switch power relay for duct fan.
X: Auxiliary relay (12V DC LY-1F)
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)
Package side Multiple remote
controller adapter
PAC-SA88HA-E Be sure to secure insulation
material by tape etc.
Installation at site
CN51
on
indoor unit
board Red
Brown
1MB
~
CN51
OC213--1.qxp 8/30/00 5:40 PM Page 9

4-4. Fixing of horizontal vane
The horizontal vane of each air outlet can be fixed according to the environment, in which it is installed.
Setting procedure
1) Turn off the main power supply (Turn off the breaker).
2) Disconnect the vane motor connector of the direction of the arrow by pressing the unlocking button as shown in the figure
below.
Electrically insulate the disconnected connector with vinyl tape.
Vane motor
Horizontal vane
Connector Unlocking button
Vane motor
3)The vane angle can be fixed by turning the vane by hand.
The vane should remain within the angles shown in the table below.
Measured standard
position of the grille
Horizontal vane
Standard of
horizontal position
Dimension A (mm) 26 29 33 37
Level 30°
(Min.) Downward 45°Downward 55°Downward 70° (Max.)
wDimension between 26mm and 37mm can be arbitrarily set.
Caution Do not set the dimension out of the range.
It could cause dew drips and stains on the ceiling, etc. and the unit may be damaged.
<Set range>
10
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11
Static pressure [Pa]
Air flow [m3/min]
2 intakes
1 intake
50
-50
-100
-150
-200
01 2 3 4 5 6
Static pressure [Pa]
Air flow [m3/min]
2 intakes
1 intake
50
-50
-100
-150
-200
01 2 3 4 5 6
Static pressure [Pa]
Air flow [m3/min]
50
-50
-100
-150
-200
01 2 3 4 5 6
Static pressure [Pa]
Air flow
[m3/min
]
2 intakes
1 intake
50
-50
-100
-150
-200
01 2 3 4 5 6 7 8 9
Static pressure [Pa]
Air flow
[m3/min]
2 intakes
1 intake
50
-50
-100
-150
-200
01 2 3 4 5 6 7 8 9
Static pressure [Pa]
Air flow [m3/min]
50
-50
-100
-150
-200
01 2 3 4 5 6 7 8 9
(1) PLFY-P80VAM.UK
Multifunction casement + Standard filter
(2) PLFY-P100VAM.UK
PLFY-P125VAM.UK
Multifunction casement + High efficiency filter
Taking air into the unit
Multifunction casement + Standard filter Multifunction casement + High efficiency filter
Taking air into the unit
4-5. 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
Q…Planned amount of fresh air intake
A…Static pressure loss of fresh air
intake duct system with air flow
amount Q
B…Forced static pressure at air condi-
tioner inlet with air flow amount Q
C…Static pressure of booster fan with
air flow amount Q
D…Static pressure loss increase
amount of fresh air intake dust sys-
tem for air flow amount Q <Pa>
E…Static pressure of indoor unit with air
flow amount Q
Qa…Estimated amount of fresh air
intake with out D <m3/min>
<m3/min>
<Pa>
<Pa>
<Pa>
<Pa>
How to read curves
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12
5OUTLINES AND DIMENSIONS
PLFY-P80VAM.UK
PLFY-P100VAM.UK
PLFY-P125VAM.UK
Unit : mm
Air outlet hole
Vane motor
Auto vane
Emergency drain hole
(Combined with hole
fed chemicals)
Drain hole
(Combined with drain
pump cleaning hole)
Grille
Drain pipe
VP-25connection
(O.D.{32)
Branch duct hole
(Cut out hole)
Ceiling surface
Suspension bolt pitch
Ceiling hole
Branch
duct hole
Suspension bolt pitch
Ceiling hole
Air outlet hole
Air intake hole
411
Air intake hole
Air intake grille
High efficiency filter
& Fresh air intake casement (option)
Power line entry
Suspension bolt lower edge
Suspension bolt M10
or W3/8
Control wire entry
Feeding hole
(Drain pump)
577
374286
840
197 159
60
17+5
0135
30
190 159
605
159192
170
140
50~70
98
89
C
840
860~91020~45 20~45
20~4520~45
Fresh air intake
Branch duct hole
860~910
810
159
16
105
A
B
77 51
M
M
M
1
2
M
950
51 77
950 577 411
Terminal block
Detail drawing of fresh air intake
{175
{150
14 - {2.8
Burring hole
3 - {2.8
Burring hole
{100
(Cut out hole)
{125
Ceiling surface
PLFY-P80VAM.UK
Models 12
PLFY-P100VAM.UK
PLFY-P125VAM.UK
Refrigerant pipe
(9.52mm dia.)
flared connection
3/8F
Refrigerant pipe
(9.52mm dia.)
flared connection
3/8F
Refrigerant pipe
(15.88mm dia.)
flared connection
5/8F
241
281
A
258
298
B
80
84
C
Refrigerant pipe
(19.05mm dia.)
flared connection
3/4F
350
120_
120_
158
90
70_
100 100 90
100 130
155
167
17+5
0
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13
WIRING DIAGRAM
6
PLFY-P80VAM.UK
PLFY-P100VAM.UK
PLFY-P125VAM.UK
}
PE
BLU BRN ORN YLW RED WHT
M2
S
TO OUTDOOR UNIT
BC CONTROLLER
REMOTE CONTROLLER
DC24-30V
M1
TB5
(SHIELD)
BLU
RED
BRN BRN WHT BLK WHT BLK
YLW
YLW
YLW
YLW
RED
WHT
BLK
FAN
(WHT)
POWER
CND
(RED)
POWER
CNDK
(RED)
D.U.M
CNP
(BLU) CN2D
(WHT) BLU
BLU
CN2M
(BLU)
M-NET
CN41
(WHT)
HA
1314
(WHT)
REMOTE
SWITCH
CN32
(WHT)
LEV
CN60
51 1
5
(GRN)
REMOTE
INDICATION
CN52
(WHT)
CENTRALLY
CONTROL
CN51
(RED)
ADDRESS
CN81
(GRN)
VANE
CN6V
(RED)
ADDRESS
CN42
12
HUMIDIFIER
CN25
(WHT)
A.B
SW5
240V220V SWA
3
2
1
SWB
2
3
41
2
3
4
(RED)
ADDRESS
CN43
(RED)
ADDRESS
CN82
1
2
3
4
5
6
7
8
CONNECTION
No.
SW14
0
SWC
SW1
87654321
OFF
ON
109
00 SW11
SW12
1ST.DIGIT2ND.DIGIT
3RD.DIGIT
6
BLU
RED
GRN/YLW
L
NTB2
TO NEXT
INDOOR UNIT
PULL BOX
FUSE(15A)
BREAKER
(15A)
POWER SUPPLY
~/N 220-240V 50Hz
ZNR
FUSE
4
I.B
P.B
8
5
5
5555
TH21
SW2
See fig. w1
10
LEV TH22
TH23
32
SW4
1
1
ON
OFF
ON
OFF
12345678923456
SW3
45
32167489
10 5
H2
GRILLE
MV MV MV MV
1
53
X4
87 23456123456
F.C
1
1
2
3
65 123421
BLK BLK BLK BLK BLK BLK
DS
12
MF
1432
13 13
64523
DP
21
C321
321
2131
(AC220-240V)
CNSK (RED) (DC13.1V) CN2S (WHT)
TRANS
2
1
122112
(WHT)
DRAIN
CN31
(BLK)
GAS
CN29
(WHT)
LIQUID
CN21
(RED)
INTAKE
CN20
123
1
1
2
LED1
LED2
X1X1X4
ON
OFF 123456
ON
OFF 123456
ON
OFF 123456
SW2MODELS
P80VAM.UK
P100VAM.UK
P125VAM.UK
(Fig. w1)
NOTE
1.At servicing for outdoor unit,always follow the wiring diagram of outdoor unit.
2.Symbol(S) of TB5 is the shield wire connection.
3.Symbols used in wiring diagram above are, :Terminal block, :Connector.
4.The setting of the SW2 dip switches differs in the capacity for the detail, see the fig. w1.
5.Please set the switch SW5 according to the power supply voltage.
Set SW5 to 240V side when the power supply is 230 and 240 volts.
When the power supply is 220 volts,set SW5 to 220V side.
LEV
A.B LINEAR EXPANSION VALVE CIRCUIT BOARD
SWITCH
NAME
P.B
CN25
CN32
CN41
CN51
CN52
SW2
SW3
SW4
ZNR
FUSE
F.C
X1
X4
LED1
LED2
C
MF
MV
DP
DS
H2
TB2
TB5
TH21
TH22
TH23
SW1
SW5
SW11
SW12
SW14
SWA
SWB
SWC
MODE SELECTION
VOLTAGE SELECTION
ADDRESS SETTING 1ST DIGIT
ADDRESS SETTING 2ND DIGIT
CONNECTION No.
CEILING HEIGHT SELECTOR
DISCHARGE OUTLET NUMBER
SELECTOR
OPTION SELECTOR
INDOOR POWER BOARD
INDOOR CONTROLLER BOARD
CONNECTOR
SWITCH
VARISTOR
FUSE (6.3A/250V)
FAN PHASE CONTROL
AUX.RELAY
POWER SUPPLY(I.B)
POWER SUPPLY(I.B)
CAPACITOR(FAN MOTOR)
FAN MOTOR(WITH INNER THERMO)
VANE MOTOR
DRAIN WATER LIFTING-UP MACH
DRAIN SENSOR
DEW PREVENTION HEATER
TERMINAL
BLOCK
THERMISTOR
I.B
NAME SYMBOLNAMESYMBOL
[LEGEND] SYMBOL
HUMIDIFIER
REMOTE SWITCH
HATERMINAL-A
CENTRALLY CONTROL
REMOTE INDICATION
CAPACITY CODE
MODE SELECTION
MODEL SELECTION
DRAIN PUMP
FAN MOTOR
POWER SUPPLY
TRANSMISSION
ROOM TEMPERATURE
DETECTION
(0;/15k’, 25;/5.4k’)
PIPE TEMPERATURE
DETECTION / LIQUID
(0;/15k’, 25;/5.4k’)
PIPE TEMPERATURE
DETECTION / GAS
(0;/15k’, 25;/5.4k’)
OC213--1.qxp 8/30/00 5:40 PM Page 13

14
7 REFRIGERANT SYSTEM DIAGRAM
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
PLFY-P80VAM.UK
PLFY-P100VAM.UK
PLFY-P125VAM.UK
Gas pipe
Liquid pipe
PLFY-P80VAM.UK
[15.88<5/8F>
[9.52<3/8F>
[19.05<3/4F>
[9.52<3/8F>
Item Service Ref. PLFY-P100VAM.UK PLFY-P125VAM.UK
Refrigeration pipe size (Flare connection size)
OC213--1.qxp 8/30/00 5:40 PM Page 14

15
TROUBLE SHOOTING
8
8-1. How to check the parts PLFY-P•VAM.UK
Parts name Check points
Disconnect the connector then measure the resistance using a tester.
(Surrounding temperature 10:~30:)
Disconnect the connector then measure the resistance valve using a tester.
Refer to the next page for detail. (Surrounding temperature 20:)
Measure the resistance between the terminals using a tester.
(Surrounding temperature 20:)
Measure the resistance between the terminals using a tester.
(Surrounding temperature 20:)
Measure the resistance between the terminals using a tester.
Measure the resistance after 3 minutes have passed since since the power supply was intercepted.
(Surrounding temperature 0:~60:)
Vane motor
Linear expansion
valve
Drain pump
Drain sensor
(Refer to the thermistor)
(Refer to the thermistor)
Room temperature
thermistor (TH21)
Liquid pipe thermistor
(TH22)
Gas pipe thermistor
(TH23)
1
2
Yellow
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
150k"
(1)-(5)
White-Red (2)-(6) Yellow-Brown (3)-(5) Orange-Red (4)-(6) Blue-Brown
NormalConnector Abnormal
300"Open or short
Normal Abnormal
290"Open or short
Orange
Red
White
Blue
Brown
Yellow
3
6
15
4
2
M
M
Orange
Red
White
Red — Yellow
Red — Blue
Red — Orange
Red — White
Blue Yellow
35
1
2
4
Measure the resistance between the terminals using a tester.
(Surrounding temperature 20:)
Fan motor
1
1
2
2
3
3
Red
White
Black
Relay connector
Protector
P80
87.2"
104.1"
Abnormal
Open or short
P100, P125
28.7"
41.6"
Red-Black
White-Black
Motor terminal
or
Relay connector
Normal
PLFY-P·VAM
OC213--1.qxp 8/30/00 5:40 PM Page 15

16
0
10
20
30
40
50
-20 -10 0 10 20 30 40 50
< Thermistor for lower temperature >
Temperature (:)
Resistance (K")
4[4
3
62
5
[3
2[2
1[1
[4
[3
[2
[1
Controller board
Drive circuit
Relay connector
Connector(CN60)
DC12V
Brown
Red
Blue
Orange
Yellow
White
5
1
3
4
6
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 thermistor(TH22)
Gas pipe temperature thermistor(TH23)
Thermistor R0=15k' ±3%
Fixed number of B=3480k' ±2%
Rt=15exp { 3480( ) }
0:15k'
10:9.6k'
20:6.3k'
25:5.2k'
30:4.3k'
40:3.0k'
Thermistor R0=6.0k' ±5%
Fixed number of B=3390k' ±2%
Rt=15exp { 3390( ) }
0:6.0k'
10:3.9k'
20:2.6k'
25:2.2k'
30:1.8k'
40:1.3k'
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 expansion valve>
1
273+t 1
273
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
-200 20406080
< Thermistor for drain sensor >
Temperature (:)
0
1
2
3
4
5
6
7
8
9
10
Resistance (K")
Thermistor for
drain sensor
OC213--1.qxp 8/30/00 5:40 PM Page 16

17
Output
(Phase)
Output
{11
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>
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
LED1k"
Symptom Check points
Operation circuit fail-
ure of the micro
processor.
Disconnect the connector on the controller board, then con-
nect LED for checking.
A pulse signal will be sent out for 10 seconds as soon as the
main switch is turned on. If there are LEDS 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 outdoor multi controller board opera-
tion monitor. During fan operation, linear
expansion valve is closed completely and
if there are some leaking, detecting tem-
perature of the thermistor will go lower. If
the detected temperature is much lower
than the temperature 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
(Liquid pipe)
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 thermis-
tor 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 lock and vibrate.
❈ When the switch is turned on, 2200 pulse opening valve signal
will be send till it goes to Apoint in order to define the valve posi-
tion.
When the valve moves smoothly, there is no noise or vibration
occurring from the linear expansion valve : however, when the
pulse number moves from Eto Aor when the valve is locked,
more noise can be heard than the normal situation.
❈ Noise can be detected by placing the ear against a screw driver
handle while touching the screw driver point / tip to the linear
expansion valve.
150’10%.
OC213--1.qxp 8/30/00 5:40 PM Page 17

18
Switch Function Remarks
<At delivery>
ON
OFF 123456789
10
Address board
Operation by switch
ON OFF
Note :
w1 Fan operation at Heating
mode.
w2 Heater therm ON is
operating.
w3 SW 1-7=OFF, SW 1-8=ON
→ Setting air flow.
SW 1-7=ON, SW 1-8=ON
→ Indoor fan stop.
Pole
Built-in remote controller
Provided
2,500hr
Effective
Thermostat ON signal indication
Always operated while the heat in ON w1
Low w3
Setting air flow w3
Effective
Effective
Filter clogging detection
Filter cleaning
Fresh air intake
Remote indication switching
Humidifier control
Air flow set in case of
Heat thermostat OFF
Auto restart function
Power ON/OFF
Indoor unit
Not provided
100hr
Not effective
Fan output indication
Operated depends on the condition w2
Extra low w3
Depends on SW1-7
Not effective
Not effective
Cooling only
Available
Available
Available
Second setting
Horizontal angle
Effective
Not effective
9(5)degrees
15degrees
Heat pump / Cooling only
Louver / humidifier w6
Vane
Vane swing function
Vane horizontal angle
Vane cooling limit angle setting w4
Heat 4degrees up
Superheat setting temperature w5
Sub cool setting temperature
Heat pump
Not available
Not available
Not available
First setting
Down A, B, C
Not effective
Effective
6(2)degrees
10degrees
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
SW1
Mode
Selection
SW2
Capacity
code
setting
1~6
1~5
SW3
Function
Selection
SW4
Unit
Selection
Indoor linear expansion
valve opening
Thermistor <intake temperature
detection> position
<At delivery>
ON
OFF 123456789
10
Indoor controller board
Note :
w4 At cooling mode, each
angle can be used only
1 hour.
w5 The numerical valve in
the parentheses shows
the case which the R22
outdoor unit is connected.
w6 SW3-2 setting
Only for PLFY-P·VAM, SW is
used to change whether the
humidifier functions or not.
(Fixed the louver function less.)
<At delivery>
Indoor controller board
<At delivery>
Set while the unit is off.
Set while the unit is off.
Set while the unit is off.
Setting in the left-shown.
Set for each capacity.
Indoor controller board
ON
OFF 12345
ON
OFF
MODELS
PLFY-
P80VAM.UK PLFY-
P125VAM.UK
PLFY-
P100VAM.UK
SW 2 MODELS SW 2
123456
ON
OFF 123456
ON
OFF 123456
8-2. FUNCTION OF DIP SWITCH
OC213--1.qxp 8/30/00 5:40 PM Page 18

19
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
220V 240V
Switch
SWA
Ceiling
height
selector
SWB
Discharge
outlet
number
selector
SWC
Option
selector
Rotary switchRotary switch
SW14
Connection
No.
setting
SW5
Voltage
Selection
SW11
1st digit
address
setting
SW12
2nd digit
address
setting
Pole
(High ceiling2)
(High ceiling1)
(Standard)
3
2
1
(2 direction)
(3 direction)
(4 direction)
2
3
4
Option
Standard Option
Standard
1~3
3
2
2
Operation by switch
✽Ceiling height can be changed depends on
SWB setting.
Address setting should be done when network
remote controller (PAR-F25MA) is being used.
When attach the optional high performance
filter elements (multi function casement) to
the unit, be sure to attach it to the option
side in order to prevent the airflow reducing.
This is the switch to be used when the indoor
unit is operated with R2,series outdoor unit
as a set.
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.
Remarks
<At delivery>
Address board
<At delivery>
Address board
<At delivery>
Address board
Address can be set while the
unit is stopped.
Address board
<At delivery>
Address board
<At delivery>
Address board
3
2
1
2
3
4
SW12
10
SW11
1SW12 SW11
SW14
SW14
<At delivery>
220V 240V
SWB
PLFY P80VAM.UK
4 direction
3 direction
2 direction
4
3
2
2.7m
3.0m
3.3m
3.0m
3.3m
3.5m
3.5m
3.5m
—
SWA 1
Standard High
ceiling1High ceiling2
23
SWB
PLFY P100VAM.UK
PLFY P125VAM.UK
4 direction
3 direction
2 direction
4
3
2
3.2m
3.6m
4.0m
3.6m
4.0m
4.2m
4.2m
4.2m
—
SWA 1
Standard High
ceiling1High ceiling2
23
OC213--1.qxp 8/30/00 5:40 PM Page 19

3. Removing the room temperature thermistor
(1)Remove the fan guard.(See photo 1)
(2) Remove the screw in the room temperature thermistor
holder to remove the holder and the room temperature
thermistor.
(3) Remove the 1 screw from the bell mouth, and unscrew the
other 2 screws (fix to the oval hole which has a different
diameter) to remove the bell mouth.
(4) Hold the holder claw, and remove the room temperature
thermistor and holder.
(5) Disconnect the connector (red) from the indoor control
board.
20
9DISASSEMBLY PROCEDURE
OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS
1. Removing the air intake grille
(1) Slide the knob of air intake grille toward the arrow 1to
open the air intake grille.
(2) Remove drop prevention hook from the panel.
(3) Slide the shaft in the hinge to the direction of the arrow2
and remove the air intake grille.
4. Removing the electrical box
(1) Remove the fan guard.(See photo 1)
(2) Disconnect the lead wire of the vane motor from the clamp,
and disconnect the white connector (10P).
(3) Remove the room temperature thermistor with the holder.
(4) Remove the bell mouth.(See photo 2)
(5) Disconnect the relay connector in the electrical box.
Red (3P) for fan motor power supply
White (2P) for pipe temperature detection / liquid thermistor
Black (2P) for pipe temperature detection / gas thermistor
Blue (2P) for drain pump
White (3P) for drain sensor
(6) Remove the 3 screws of the electrical box and loosen the
other 2 screws to remove the box.
<Electrical parts in the electrical box>
Indoor controller board
power supply board
Terminal block (Power supply)
Terminal block (Transmission)
Capacitor
Address board
PLFY-P80VAM.UK Be careful on removing heavy parts.
Photo 3
Figure 1
Photo 1
Air intake grille
Grille
2. Removing the fan guard
(1) Open the air intake grille.
(2) Remove the 3 screws of fan guard.
Nut
Air intake grille knob
Bell mouth
Indoor controller board Connector
Terminal
block
Photo 2
Screws
Room
temperature
thermistor
Air intake grille
Connector
Electrical
box
Power
supply
board
Turbo fan
Screws
Fan guard
Air intake grille
Address
board
OC213--1.qxp 8/30/00 5:41 PM Page 20