-
419
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'12 • PAC-T-173
E57
1. Applicable model
5. Troubleshooting
Models FDC71-140
Diagnosis
Countermeasure
NO
YES
NO
YES
Is the
service valve fully
opened?
Are the
connections of indoor
heat exchanger and/or return air
temperature thermistor
connectors OK?
NO
YES
NO
YES
Are the
characteristics of indoor heat
exchanger and/or return air
temperature thermistor
OK?
Is the low
pressure during operation
normal?
Indoor heat exchanger, return air temperature thermistor
Temperature-resistance characteristics
15
10
5
0
10
30
40
20
50
Temperature thermistor resistance (k
)
Temperature (°C)
5k
at 25°C
(Broken wire)
(Short circuit)
Open fully.
Correct indoor heat
exchanger, return air
temperature thermistor
connector connections.
Defective indoor heat
exchanger, return air
temperature thermistor
ª
Replace.
Charge refrigerant.
Defective indoor control
PCB
ª
Replace. (Defective
indoor heat exchanger,
return air temperature
thermistor input circuits)
2. Error detection method
• Judge insufficient refrigerant
amount by detecting the
temperature differnce between
indoor heat exchanger (ThI-R)
and indoor return air (ThI-A).
• It detects at initial startup in
cooling or dehumidifying
mode after power ON.
(In case of model 71 it cannot
detect)
3. Condition of Error displayed
Anomalous stop at initial
detection
4. Presumable cause
• Defective indoor heat
exchanger temperature
thermistor
• Defective indoor return air
temperature thermistor
• Defective indoor control PCB
• Insufficient refregerant
amount
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temperature difference between indoor heat exchanger (ThI-R) and return air temperature (ThI-A) for 1 minute after compressor ON in
cooling or dehumidifying mode and for 9 minutes after compressor ON in heating mode. [ in cooling mode: (ThI-A)-(ThI-R)>4degC, in
heating mode: (ThI-R)-(ThI-A)<4degC]
Error code
Remote controller:
LED
Green
Red
Outdoor control PCB
Outdoor inverter
PCB
1 time flash
Keeps flashing
Indoor control PCB
Stays OFF
Keeps flashing
Content
Keeps flashing
Yellow
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or detection of service valve closure
(Models FDC71-140)
Summary of Contents for FDC Series
Page 95: ... 94 12 PAC T 173 Models FDT100VF 125VF 140VF H H H H H C B A F G D G PJF000Z285 ...
Page 98: ... 97 12 PAC T 173 Models FDEN60VF 71VF C 2 C 1 A B A B D C 1 C 2 C 1 C 2 E G F B PFA003Z817 ...
Page 113: ... 112 12 PAC T 173 b Wireless remote controller RCN E1R 60 17 150 Unit mm ...
Page 278: ... 277 12 PAC T 173 ー K ...
Page 346: ... 345 12 PAC T 173 Power PCB 1BSU OVNCFS 4GRNCEG VJG 2 ...
Page 518: ... 517 12 PAC T 173 3 5 SUPER LINK E BOARD SC ADNA E F SL2NA E and SL3N AE BE to control ...
Page 519: ... 518 12 PAC T 173 ...
