Daikin AT12BV1LS Pocket Manual page 135

Troubleshooting
Trouble
shooting
Check No.4
Refer to
P.151
Check No.6
Refer to
P.157
134
Be sure to turn off power switch before connect or
Caution disconnect connector, or parts damage may be occurred.
Any thermistor
disconnected?
NO
Stop valve closed?
NO
Check for gas leakage.
Oil
oozing at relay pipe
connections?
NO
Oil oozing
at internal piping?
NO
Check No.
Electronic expansion valve
functioning?
YES
Check the CT.
Functioning
Change for a specified
amount of fresh refrigerant.
Gas shortage
error again?
NO
YES
* Discharge pipe
thermistor
* Indoor / outdoor
unit heat
exchanger
thermistor
* Room
temperature
thermistor
* Outdoor air
thermistor
YES
YES
YES
4
NO
Malfunctioning
YES
Si10-417
Reconnect in position.
Open the stop valve.
Repair the pipe flare
or replace the square
union.
A
Replace the electronic
expansion valve.
CT in trouble (refer to
H8).
B
Procedure complete
Service Diagnosis