P4 Radiation Fin Thermistor Or Related Abnormality - Daikin R71FUV1 Service Manual

Troubleshooting by Remote Controller
P4
3.77
Related Abnormality
Remote Controller Display
P4
Applicable Models
RZQ-K/H, RZQ(S)-B/C, RZR-KU/HU
Method of Error Detection
Detection by open or short circuit of the radiation fin
thermistor during the compressor stops operating.
Error Decision Conditions
When open or short circuit of the radiation fin thermistor
is detected during the compressor stops operating
Supposed Causes
Defective radiation fin thermistor
Defective outdoor unit PCB
Troubleshooting
Caution
Disconnect the connector
on inverter PCB, then
check the thermistor
resistance at the ordinary
temperature.
CHECK 1
Normal?
YES
Is reset
possible?
YES
CHECK 1
Radiation Fin Thermistor or
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
NO
NO
Refer to P.459.
Si20-701_B
Replace the
outdoor unit
inverter PCB.
Replace the
outdoor unit
inverter PCB.
Reset.
335