Shut off the power supply and
turn it on 2 minutes later.
Shut off the power supply and
turn it on 2 minutes later.
Does a problem
remain?
Does a problem
remain?
YES
Is the water-level switch
inserted properly?
Is the water-level switch
inserted properly?
Replace the indoor main PCB.
Replace the indoor main PCB.
YES
The unit is operating normally.
The unit is operating normally.
NO
Insert the water-level
switch properly
Insert the water-level
switch properly
NO
Is the water-level switch
broken?
Is the water-level switch
broken?
Replace the water-level switch
Replace the water-level switchNO
YES
Replace the water pump
Replace the water pump
Does a problem
remain?
Does a problem
remain?
YES
The unit is operating normally.NO