Four Way Valve Performance Check; Inverter Unit Refrigerant System Check - Daikin 3MKS50E3V1B Service Manual

Check
8.7

Four Way Valve Performance Check

Check No.13
8.8

Inverter Unit Refrigerant System Check

Check No.14
330
Turn off the power and turn it on
again.
Start heating operation.
S80 voltage at 220 - 240
VAC 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
1000 ~ 2000 Ω?
YES
(Fig. 1)
Voltage at S80
220 - 240 VAC
Compressor
ON
Refrigerant system check
Is the discharge pipe
thermistor disconnected from
the holder?
NO
Check for refrigerant leakage.
See the section on refrigerant
shortage detection.
∗ Four way valve coil
Cooling / Dry : No continuity
Heating : Continuity
NO
NO
Time
YES
SiBE121135
Replace the outdoor unit
PCB.
Replace the four way valve
coil.
Replace the four way valve.
(R11903)
(R11904)
Reconnect the thermistor.
Replace the refrigerant.
(R15833)
Service Diagnosis