Daikin AT12BV1LS Pocket Manual page 124

Si10-417
Service Diagnosis
A
Monitor the supply voltage,
discharge and suction
pressures, and other factors
for a long term.
Possible causes
l
Instantaneous supply
voltage drop
l
Compressor motor
overloaded
l
Contact-induced electrical
short-circuit
2A
Check No. 13
Check the power transistor.
Normal?
YES
Turn off the power, and
reconnect the harnesses. Turn
on the power again and get
restarted.
Check the supply voltage.
Voltage as rated?
YES
Short-circuit or
breakage between
compressor's coil
phases?
NO
Check No. 8
Check the discharge pressure.
Check No. 7-1
Check the installation condition.
Troubleshooting
Keep on using as it is
(monitor).
Check the electricals'
connectors and other
fittings.
∗ Inverter checker
Part No.: 1225477
NO
Correct the power
supply or replace the
SPM.
(Replace the outdoor
unit PCB.)
Replace the SPM.
(Replace the outdoor
unit PCB.)
NO
Correct the power
supply.
YES
Replace the
compressor.
(R2852)
123