Daikin FTXS30LVJU, Руководство по обслуживанию, Страница: 144 / 414

SiUS091133 Troubleshooting
Service Diagnosis 134
4.23 Thermistor or Related Abnormality (Outdoor Unit)
Remote
Controller
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 or below 0.04 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 corresponding to the error code

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
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.