Daikin AT12BV1LS Pocket Manual page 156

Si10-417
5.4.4 Four Way Valve Performance Check
Check
No.5-1
Service Diagnosis
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 1500
Ω?
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
Troubleshooting
(R2856)
155