Daikin Super Multi NX FTXS20G2V1B, Руководство по обслуживанию

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SiENBE04-808_A Troubleshooting
Service Diagnosis 132
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 (42 class: 4.98 V) or below 0.04 V (42 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.
SiENBE04-808_A.pdf 144 21/02/2011 13:20:03