Daikin FTXM-V Series, Руководство по обслуживанию

Страница: 130 / 172

Troubleshooting SiUS042113E
126 Part 6 Service Diagnosis
4.24 Thermistor or Related Abnormality (Outdoor Unit)
Error Code
H9
,
J3
,
J6
,
J8
,
P4
Method of Error
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.
Error Decision
Conditions  The voltage between the both ends of the thermistor is either 4.96 V or more, or 0.04 V or less
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(s)
 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 (main PCB).
P4 : Radiation fin thermistor
Caution
Be s u re to t u rn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.