Daikin AT12BV1LS Pocket Manual page 127

Troubleshooting
126
A
Compressor vibrating
too much?
NO
B
Malfunctioning
Check No. 6
Check the thermistors.
Functioning
YES
Check the power
transistor harness for
looseness. Correct it
as required. Also
replace cracked pipe if
any.
Check the pipes for
improper contact.
Correct as required.
Also replace cracked
pipe if any.
Replace the room
temperature or
outdoor air thermistor,
or the indoor unit or
outdoor unit heat
exchanger thermistor.
(1) Replace the PCB.
(2) Replace the
compressor.
Service Diagnosis
Si10-417
(R2853)