Daikin AT12BV1LS Pocket Manual page 157

Troubleshooting
Check
No.5-2
156
Turn off the power and turn it
on again.
Start the heating-mode run.
S80 voltage
at DC 180-220 V with
compressor on?
(Fig. 1)
YES
Disconnect the four way valve
coil from the connector and
check the continuity.
Four way valve
coil resistance at
3kΩ±0.5kΩ?
YES
(Fig. 1)
Voltage at S80
DC180-220V
Compressor
ON
∗ Four way valve coil
Cooling / dry : No continuity
Heating : Continuity
NO
Replace the outdoor
unit PCB.
NO
Replace the four way
valve coil.
Replace the four way
valve.
Time
Si10-417
(R3047)
Service Diagnosis