Daikin AT12BV1LS Pocket Manual page 39

Troubleshooting
Trouble
shooting
Check No.4
Refer to
P.151
Check No.6
Refer to
P.157
38
Be sure to turn off power switch before connect or
Caution disconnect connector, or parts damage may be occurred.
Check the wiring and piping.
Wiring or
piping out of spec?
NO
Check No. 4
Check the electronic
expansion valve.
Motor functioning?
YES
Check No. 6
Check the outdoor unit heat
exchanger thermistor.
Thermistor
as specified in its
characteristic
chart?
YES
Check No. 6
Check the room temperature
thermistor.
Thermistor
as specified in its
characteristic
chart?
YES
Change the gas to let
moisture out of the unit (after
drawing a vacuum).
Error again?
NO
YES
Activate the wiring
error check mode.
NO
Replace the defective
Ev or coil.
NO
Replace the heat
exchanger thermistor.
NO
Replace the room
temperature
thermistor.
YES
Replace the room
temperature
thermistor or indoor
unit heat exchanger
thermistor.
Do the vacuum-drying.
Replace the indoor
unit PCB and then
start the wiring error
check mode.
Service Diagnosis
Si10-417
(R3059)