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Troubleshooting
SiENBE04-925_A
104
Service Diagnosis
4.20 Thermistor or Related Abnormality (Outdoor Unit)
Remote Control
Display
H9, J3, J6, P4
Method of
Malfunction
Detection
This fault is identified based on the thermistor input voltage to the microcomputer.
A thermistor fault is identified based on the temperature sensed by each thermistor.
Malfunction
Decision
Conditions
The thermistor input voltage is above 4.96 V (25 class: 4.98 V) or below 0.04 V (25 class:
0.02 V) with the power on.
J3
error is judged if the discharge pipe temperature is lower than the heat exchanger
temperature.
Supposed
Causes
Disconnection of the connector for the thermistor
Defective thermistor
Defective heat exchanger thermistor in the case of
J3
error (outdoor heat exchanger
thermistor in cooling operation, or indoor heat exchanger thermistor in heating operation)
Defective outdoor unit PCB
Defective indoor unit PCB
Troubleshooting
In case of “
P4
”
Replace the outdoor unit PCB.
P4
: Radiation fin thermistor
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
SIENBE04-925_A_FRONT.pdf 119
24/02/2011 13:53:57
Summary of Contents for Inverter FTXL20G2V1B
Page 8: ...SiENBE04 925_A vi Table of Contents...
Page 14: ...Introduction SiENBE04 925_A xii...
Page 15: ...SiENBE04 925_A List of Functions 1 Part 1 List of Functions 1 Functions 2...
Page 17: ...SiENBE04 925_A Specifications 3 Part 2 Specifications 1 Specifications 4...
Page 20: ...Specifications SiENBE04 925_A 6 Specifications...