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TECHNICAL & SERVICE MANUAL
Air-Conditioners For Building Application
Models
Series PLFY^ Ceiling Cassettes
For use with the R410A & R407C & R
PLFY-P20VLMD-E,PLFY-P63VLMD-E
PLFY-P25VLMD-E,PLFY-P80VLMD-E
PLFY-P32VLMD-E,PLFY-P100VLMD-E
PLFY-P40VLMD-E,PLFY-P125VLMD-E
PLFY-P50VLMD-E
INDOOR UNIT
CONTENTS
SAFETY PRECAUTIONS ·························
1. FEATURES ···········································
2. PART NAMES AND FUNCTIONS ········
3. SPECIFICATION ···································
4. OUTLINES AND DIMENSIONS············
5. WIRING DIAGRAM ·····························
6. REFRIGERANT SYSTEM DIAGRAM ···· 13
7. TROUBLE SHOOTING ·······················
8. DISASSEMBLY PROCEDURE ···········
SAFETY PRECAUTIONS
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 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
s Before installing the unit, make sure you read all the “Safety precautions”. s The “Safety precautions” provide very important points regarding safety. Make sure you follow them. s This equipment may cause the adverse effect on the same supply system. s Please 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. - Inadequate connection and fastening may generate heat and cause a fire. - Prepare for typhoons and other strong winds and earthquakes - Keep the electric parts away from water (washing water etc.). - It might result in electric shock, catching fire or smoke. - To dispose of this product, consult your dealer. - Do not use a leak detection additive.
PLFY-P20VLMD-E
PLFY-P25VLMD-E
PLFY-P32VLMD-E
PLFY-P40VLMD-E
PLFY-P50VLMD-E
PLFY-P63VLMD-E
PLFY-P80VLMD-E 9.0 / 10.
PLFY-P100VLMD-E 11.2 / 12.
PLFY-P125VLMD-E 14.0 / 16.
(^1) FEATURES
Indoor unit
Series PLFY Ceiling Cassettes
Models
Cooling capacity/Heating capacity kW
(^2) PART NAMES AND FUNCTIONS
Indoor (Main) Unit
Air inlet
Sucks the ambient air in.
Long-life filter
Removes the sucked-in dust and dirt. Since the long-life filter is used as an air filter, it should be cleaned at the begin- ning of air-cooling and heating seasons. (During seasons with large amounts of dust and dirt, more frequent cleaning are recommended.)
Autovane
Disperses the airflow up and down and adjusts the angle of the airflow.
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.
PAR-20MAA
ON/OFF
CENTRALLY CONTROLLED
ERROR CODE
CLOCKON^ OFF ˚C
CHECK CHECK MODETEST RUNFILTER FUNCTION
˚C
1Hr.
STAND BYDEFROST NOT AVAILABLE
FILTER
CHECK TEST
TEMP.
TIMER SET
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 C Position 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.
3 SPECIFICATION
3-1. Specification
Note:
❇ 3 The figure in < > indicates panel's
❇ 1 Cooling/Heating capacity indicates the maximum value at operation under the following condition. Cooling : Indoor 27˚CDB/19˚CWB,Outdoor 35˚CDB Heating : Indoor 20˚CDB,Outdoor 7˚CDB/6˚CWB ❇ 2 Cooling capacity indicates the maximum value at operation under the following condition. Cooling : Indoor 27˚CDB/19.5˚CWB,Outdoor 35˚CDB (WR2: water 30˚C) ❇ 4 It is measured in anechoic room.
PLFY-P20VLMD-E PLFY-P25VLMD-E PLFY-P32VLMD-E PLFY-P40VLMD-E
Power source ~ 220-240V 50Hz / ~ 220-230V 60Hz
kcal/h
Cooling capacity ❇^1 kW ❇ 2 ❇ 1
❇ 3
kW Cooling kW Heating Cooling Heating
kW A A
mm mm mm kg
m^3 /min Pa
kW
mm mm
dB(A) dB(A)
Heating capacity Power consumption
Current External finish(Munsel No.)
Dimension ❇ 3
Height Width Depth Net weight Heat exchanger
Fan
Type
External static pressure
Motor Output
Type
Air filter Refrigerant pipe dimension
Gas(Flare) Liquid(Flare) Drain pipe dimension
Unit: Galvanizing Decoration Panel: ABS (0.7Y 8.59/0.97) Service Panel: Galvanizing (0.7Y 8.59/0.97) 290 <20> 776 <1080> 634 <710> 23 <6.5> Cross fin Turbo fan✕ 1
Single phase induction motor
PP honeycomb fabric (long life filter) ø 12. ø 6. Unit drain pipe I.D.32 (1-1/4inch)
6.5-8.0-9.5 7.0-8.5-10. 0
24 <6.5>
Airflow rate (Lo-Mid-Hi)
Noise level (Lo-Mid-Hi) ❇ 4
220V,240V 230V
2,
0.072 / 0. 0.065 / 0. 0.36 / 0. 0.30 / 0.
2,
0.072 / 0. 0.065 / 0. 0.36 / 0. 0.30 / 0.
3,
0.072 / 0. 0.065 / 0. 0.36 / 0. 0.30 / 0.
4,
0.081 / 0. 0.074 / 0. 0.40 / 0. 0.34 / 0.
27-30- 28-31-34 30-34-
PLFY-P63VLMD-E PLFY-P80VLMD-E PLFY-P100VLMD-E PLFY-P125VLMD-E Power source ~ 220-240V 50Hz / ~ 220-230V 60Hz
kcal/h
Cooling capacity ❇^1 kW ❇ 2 ❇ 1
❇ (^3)
kW Cooling kW Heating Cooling Heating
kW A A
mm mm mm kg
m^3 /min
Pa
kW
mm
mm
dB(A) dB(A)
Heating capacity Power consumption
Current
External finish(Munsel No.)
Dimension (^) ❇ 3
Height Width Depth Net weight Heat exchanger
Fan
Type
External static pressure
Motor Output
Type
Air filter
Refrigerant pipe dimension
Gas(Flare)
Liquid(Flare)
Drain pipe dimension
Unit: Galvanizing Decoration Panel: ABS (0.7Y 8.59/0.97) Service Panel: Galvanizing (0.7Y 8.59/0.97)
634 <710>
290 <20> 1446 <1750> 1708 <2010> 606 <710> 28 <7.5> 44 <12.5> 47 <12.5> 56 <13.0> Cross fin Turbo fan✕ 1 Turbo fan✕ 2 Sirocco fan✕ 4
Single phase induction motor
Synthetic fiber unwoven cloth filter (long life)
ø 15.
ø 9.
Unit drain pipe I.D.32 (1-1/4inch)
10.0-13.0-15.5 15.5-18.5-22.0 17.5-21.0-25.0 24.0-27.0-30.0-33.0(Lo-Mid2-Mid1-Hi) 0
0.020 0.020 (at 240V) 0.030 (at 240V) 0.078✕2(at 240V)
Airflow rate (Lo-Mid-Hi)
Noise level (Lo-Mid-Hi) ❇ 4
220V,240V 230V
6,
0.101 / 0. 0.094 / 0. 0.49 / 0. 0.43 / 0.
8,
0.147 / 0. 0.140 / 0. 0.72 / 0. 0.66 / 0.
10,
0.157 / 0. 0.150 / 0. 0.75 / 0. 0.69 / 0.
12,
0.28 / 0. 0.27 / 0. 1.35 / 1. 1.33 / 1.
33-36- 34-37-
PLFY-P50VLMD-E
946 <1250>
27 <7.5>
PP honeycomb fabric (long life filter)
9.0-11.0-12.
5,
0.082 / 0. 0.075 / 0. 0.41 / 0. 0.35 / 0.
31-34- 32-35-
32-37- 33-38-40 37-41-
40-42-44- (Lo-Mid2-Mid1-Hi)
ø 15.88 (R410A) ø 19.05 (R22,R407C)
29-33-
ø 12.7 (R410A) ø 15.88 (R22,R407C) ø 6.35 (R410A) ø 9.52 (R22,R407C)
36-39-
1.7μF x 440V
1.5μF x 440V
2.2μF x 440V
1.5μF x 440V
2.0μF x 440V
5.0μF x 440V
LEV
C1 (^) 1.3μF x 440V
MF
PLFY-P
VLMD-E
PLFY-P
VLMD-E
PLFY-P
VLMD-E
PLFY-P
VLMD-E
PLFY-P
VLMD-E
PLFY-P
VLMD-E
3-2. Electrical parts specifications
Model
Parts name
Tranrsformer T (^) (Primary) 220-240V 50Hz, 220-230V 60Hz (Secondry) 23.2V 1.1A
(Primary) 50/60Hz 220-240V (Secondry) 18.4V 1.7A
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
TH
TH
Gas pipe thermistor
F901 250V 6.3A
MV
DP
Drain sensor DS
TB
TB
TB
Fuse (Indoor controller board)
Power supply terminal bed
Transmission terminal bed
PLFY-P
VLMD-E
PLFY-P
VLMD-E
PLFY-P
VLMD-E
OFF 145± 8 °C
ON 88± 15 °C
DC12V Stepping motor
INPUT 6.4/5.5W
400cm^3 /min
INPUT
8/7.5W
400cm^3 /min
Resistance 0°C/6.0kΩ, 10°C/3.9kΩ, 20°C/2.6kΩ,25°C/2.2kΩ, 30°C/1.8kΩ, 40°C/1.3kΩ
DC12V Stepping motor drive port dimension ø 3.2 (0~2000pulse)
(L,N, ) 330V 30A
(M1,M2,S),(1,2) 300V 10A
Room temperature thermistor
Fan motor (with Inner- thermostat)
6-pole OUTPUT 15W
6-pole OUTPUT 30W
4-pole OUTPUT 78W
6-pole OUTPUT 20W
Symbol
TH
Inner- thermostat (Fan motor)
Liquid pipe thermistor
Fan motor capacitor
Drain-up mechanism
Linear expansion valve
Vane motor
OFF
130 ˚C± 5 ˚C
ON
90 ˚C± 20 ˚C
DC12V Stepping motor drive port dimension ø 5. 0~1800pulse 0~2000pulse
0~1800pulse 0~2000pulse
PLFY-P125VLMD-E
Unit : mm
A
3
3
1
2
Water filling port
(^213)
Air filter
338~353 20
4- ø
2.8Mounting hole
Standard center panel(CMP-125VLW-B)
Branch duct
ø 200 knock out hole (both side)
4- ø
Fresh air intake 2.9Mounting hole
ø 150 knock out hole 90 ˚
(^224) ø ˚ 45
˚ 90
ø^172
(^303) ˚ 90
170mm
±5mm(Actual length)
600mm Max
300mm or less
45
More than 350
155
255
127
127
107
574
1970
670
48 48
107
1756
68
68
574
(Lifting bolt pitch)
192
1970
(Ceiling opening)
670
(Ceiling opening)
20
20
710
2010
20
20
290
606
145
856
17561708
(Lifting bolt pitch)
181
235
Drain hole
222
Control box
Terminal bed(Power source) Terminal box
70
333
38
106
47670
178
606
Terminal bed(Transmission)
Note: 1.Use M10 screw for the lifting bolt (field supply).
2.On this model, you would use flare nut packedwith the Indoor Unit, when connnectingtheOutdoor Unit for R407C, R22.3.In order to increase the strength of theflare nut,the size of some of them has been increased.
A(Gas)^36
A(Liquid)
22
PLFY-P125VLMD-E
Model
Gas pipe:LP
ø 15.88 ø 19.05
Liquid pipe:HP
ø 9.
Drain hose VP-25 (accessory)
········
1 ········
2 ········
3
PLFY-P20· 25 · 32 · 40 · 50 · 63 · 80 ·100VLMD-E with OA duct flange
Unit : mm
52
34 110
159
E
20
221
Control Box
G-ø
2.9 Mounting hole
both side
206
241 138
243 103
D(Lifting Bolt Pitch)
C B
20
F
Branch duct Fx110 knock out hole(both side)(Note:2)
45 ˚
Fresh air intake knock out dimension
Fresh air intake
ø150 knock out hole
4-ø
2.9 Mounting hole
ø^172
ø^150
˚ 90
103 128
B
108
D(Lifting Bolt Pitch)
108
574
634 507 146 70
48
670
48
Terminal bed(Transmission)Terminal bed(Power source)
128
241
256
189
Terminal box
Air filter
Water filling port
Drain hole 3
2
1 290
45
20
68
20
20 68
More Than 350
670
190
146
497 634
122
266
60
574
(Lifting Bolt Pitch)
70
170mm
5mm(Actual Length)
300mm or less
583mmMAX
710
A
Standard center panel
3
36
22
H(Gas)^2729 22 H(Liquid)
17
CMP-40VLW-BCMP-63VLW-B
388
776
824
1040 1080
473
994 946
1210 1250
E
D C B A
PLFY-P20VLMD-EPLFY-P25VLMD-EPLFY-P32VLMD-EPLFY-P40VLMD-EPLFY-P50VLMD-EPLFY-P63VLMD-E
Model
✕^2
F
G^6
PLFY-P80VLMD-EPLFY-P100VLMD-E
10
✕^4
1494
723
1446 1710 1750
CMP-100VLW-B
H
Note: 1.Use M10 screw for the lifing bolt (field supply).
2.It is available to connect the branch duct on right and left side both.3.On Model :50, 100, you would use flare nut packed with the Indoor
Unit, when connnecting the Outdoor Unit for R407C, R22. 4.In order to increase the strength of the flare nut, the size of some
of them has been increased.
Model
Gas pipe:LP
ø 12.
20
·^25
·^32
·^40
Liquid pipe:HP
ø 6.
Model
Gas pipe:LP
ø 12.7
50
ø 15.88
Liquid pipe:HP
ø 6.35 ø 9.52
Model
Gas pipe:LP
ø 15.
63
·^80
Liquid pipe:HP
ø 9.
Model
Gas pipe:LP
ø 15.88
100
ø 19.05
Liquid pipe:HP
ø 9.
Drain hose
VP-25 (accessory)
········
1 ········
2 ········
1 ········
2 ········
1 ········
2 ········
1 ········
2 ········
3
PLFY-P125VLMD-E
✻^
Capacitor5.
μF
✕^
TO NEXT INDOOR UNITPOWER SUPPLY~ 220-240V 50Hz 2
PULL BOXFUSE(16A)BREAKER(16A)
TO OUTDOOR UNIT
BC CONTROLLERM-NET REMOTE CONTROLLER
AC250V6.3A F
For test of pump out(After confirm drain pump out,take this connector off.)
PLFY-P
·125VLMD
MF,MF1,MF
C,C1,C
I.BA.BTB2TB5FTDP
LEV MVDSTH21TH SW11(A.B)SW12(A.B)
✻^
Capacitor(for MF,MF1,MF2)
Electronic linear expan.valve
Indoor controller boardAddress boardPower source terminal bedTransmission terminal bed
TB
Transmission terminal bedFuse AC250V 6.3A FTransformerDorain pump
Motor for vane (with limit switch)Drain sensorThermistor (inlet temp.detection)Switch (1st digit address set)
SW1(A.B)SW2(I.B)SW3(I.B)SWA(A.B)
TH
SW14(A.B) SWC(A.B)
SYMBOL
Fan motor
NAME
Thermistor (pipe temp.detection / liquid)Thermistor (pipe temp.detection / gas)Switch (2nd digit address set)
Switch (connection No.set)Switch (for mode selection)Switch (for capacity code)Switch (for mode selection)Switch (option parts)
SW4(I.B)
Switch (for model selection)
SYMBOL EXPLANATION
LS
Limit switch (MV built in)
Switch (option parts)
SYMBOL
SYMBOL
S.B
Surge absorber board
X1,X3,X
Aux.relay
NAME
NAME
SW5(A.B)
Switch (for voltage selection)
PE
21
I.B
CN2M ZNR
F CND
X^
X
FAN
FAN
FAN CON
CNV CNP CNT
CN
CN
CN
CN
CN
CN
1
1
1
1
1
1
1
1
1
1
(^23)
3
2
2
2
2
3
3
3
3
3
3
(^12)
4
5 3
(^56)
C
T
(^13) 5
LEV
MV
DP
MF
LS
DS
TH
SW SW
SW
SW
1 CN3T 3
A.B SW14(Connection No.)
87654321
SW12(2nd digit)
CN
(^12) TH
1 2 3 4
SWA SWC
1234
CN
TH
SW11(1st digit)
LN S(SHIELD)
M
(^12) (^34) (^56) 8 7
(Red)
(Black)
(White)
ZNR
1 3 CN
DSA
M1S.B
CN
CN
2
1
5 6
SW
123 (White)
(White)
(Red) (Red)
(^12)
(Green)
1 (White)
MF
C
MF
C
FEDCBA^9
098765 1234
(^0 ) (^1234 ) 876
0 78 123456
TB5(TRANSMISSION TERMINAL BED)TB
INSIDE SECTION OF CONTROL BOX
INSIDE SECTION OFTERMINAL BED BOX
X
TO MA REMOTE CONTROLLER
TB15 (TRANSMISSION TERMINAL BED) 21
CN3A
31
NOTE;1.TB2,TB5 shown in dotted line
are field work.2.Mark
indicates terminal bed, connector,
board insertion
connector or fastening connectorof control board.
REMOTESWITCHCN
CENTRALLYCONTROLCN
REMOTEINDICATIONCN
6 REFRIGERANT SYSTEM DIAGRAM
Strainer (#100mesh)
Strainer (#100mesh)
Heat exchanger
Room temparature thermistor TH
Gas pipe thermistor TH
Liquid pipe thermistor TH
Linear expansion valve
Gas pipe
Flare connection
Gas pipe
PLFY-P20,25,32,40VLMD-E PLFY-P50VLMD-E
Liquid pipe
Capacity Item
ø 12.7 <1/2F> (R410A)
ø 12.7 <1/2F> ø 15.88 <5/8F> (R22,R407C)
ø 6.35 <1/4F> ø^ 6.35^ <1/4F> (R410A)
ø 9.52 <3/8F> (R22,R407C)
Gas pipe
PLFY-P63,80VLMD-E PLFY-P100,125VLMD-E
Liquid pipe
Capacity Item
ø 15.88 <5/8F> (R410A)
ø 15.88 <5/8F> ø 19.05 <3/4F> (R22,R407C)
ø 9.52 <3/8F> ø 9.52 <3/8F>
0
10
20
30
40
50
-20 -10 0 10 20 30 40 50
< Thermistor for lower temperature >
Temperature (˚C)
Resistance (K
Ω^
)
4 ø^4
3
6
5
ø 3
2 ø^2
1 ø^1
ø 4
ø 3
ø 2
ø 1
Controller board
Drive circuit
Connector(CN60)
DC12V
Brown
Red
Blue
Orange
Yellow
White
M
4
6
2 3
5 1
Blue
Brown
Yellow
White Red Orange
Linear expansion valve
Table of thermistor resistance
Thermistor (piping temperature detection,
room temperature detection)
Thermistor Ro = 15kΩ±3%
B constant = 3480kΩ±2%
Thermistor R 0 =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 ˚C 3.0kΩ
Linear expansion valve
Operation 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.
273+t
Output (Phase)
Output
ø 1
ON
ø 2 ON
ø 3 OFF
ø 4 OFF
OFF
ON
ON
OFF
OFF
OFF
ON
ON
ON
OFF
OFF
ON
➁ Linear expansion valve operation
➂ Trouble shooting
D
A E
B
C
Open
Extra tightning (80~100pulse)
Pulse number
1800 pulse Opening a valve all the way
Close
Valve position (capacity)
6 5 4 3 2 1
1kΩ LED
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 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.
- 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 posi- tion.
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.
150 Ω 10%.
❈1:1800pulse at R410A outdoor unit. 2000pulse at the other outdoor unit.
❈ 1
0 5
9 4
(^8723) 6
1
SW
10
0 5
9 4
(^8723) 6
1
SW
1
0 8
F 7
E DC 65 4 B
3 A
2 9
1
SW
0 5
9 4
87 32 6
1
SW 0 5
9 4
(^8723) 6
1
SW
0 8
F 7
E DC 65 4 B
3 A
2 9
1
SW
Switch Pole Operation by switch Remarks
SW
1st digit
address
setting
SW
2nd degit
address
setting
Rotary switch
SW
Connect
ion
Voltage
Selection
No.
setting
Rotary switch
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.
SW
SW
If the unit is used at the 220V or 230V area,
set
ON : 220, 230V
OFF : 240V
the switch as ON.
If the unit is used at the 240V, set the switch
as OFF.
Address can be set while the unit is stopped.
Note:
Note:
Note:
Note 1 : The DipSW setting is effective during unit stopping ( remote controller OFF ) for SW11,12,14 and 5.
ON
OFF
ON
OFF
ON OFF 1 2 3 4
Set while the unit is off. ON OFF 1 2 3 4
<model: 20~100>
(Option)
(Standard) SWC
(SWA)
0 5
9 4
(^8723) 6
1
SW
10
0 5
9 4
(^8723) 6
1
SW
1
0 8
F 7
E DC 65 4 B
3 A
2 9
1
SW
3 2 1
(Option)
(Standard)
0 5
9 4
(^8723) 6
1
SW 0 5
9 4
(^8723) 6
1
SW
0 8
F 7
E DCB 654 3 A
2 9
1
SW
Address board
Address board
Address board
Address board
Switch Pole Operation by switch Remarks
* As this switch is used by interlocking with
SWC,refer to the item of SWC for detail
SWA
Option
OptionSWC^2
SW
1st digit
address
setting
SW
2nd degit
address
setting
Rotary switch
SW
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
SW
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:
Note:
Note:
Note:
Note:
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.
<model: 125>
