Daikin B-Series Service Manual page 154

Si04-306E
5.1.3 Four Way Valve Performance Check
Check No.05
(Fig. 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 ohms?
YES
Voltage at S80
DC180-220V
Compressor
ON
∗ Four way valve coil
Cooling / dry : No continuity
Heating : Continuity
NO
NO
Time
Check
Replace the outdoor unit
PCB.
Replace the four way valve
coil.
Replace the four way valve.
(R8564)
143