Is the water supply pump connector (WH2) properly assembled?
YES
Is there check valve on the AG?
Product number: G
YES
Are the AG water level sensor connectors (WH2, WH1)
connected?
YES
Are the main PCB connectors (WH8, YL4, BL12) properly
assembled?
YES
Replace the main PCB.
NO
NO
Remove the check valve.
NO
NO
68
Connect the connector.
Connect the connector.
Connect the connector.