Carrier 40MBFAQ - Page 23

40MBFAQ: Service Manual
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23
DIAGNOSIS AND SOLUTION (CONT.)
EH 0E (Water-Level Alarm Malfunction Diagnosis and Solution)
Recommended parts to prepare:
• Connection wires
• Water-level switch
• Water pump
• Indoor PCB
Troubleshooting
Does a problem remain?
YES
I
Is the water-level switch
inserted properly?
Replace the indoor main PCB.
YES
The unit is operating normally.
NO
Insert the water-level
switch properly.
NO
Is the water-level switch
broken?
NO
YES
Replace the water pump.
Does a problem remain?
YES
Shut o the power supply and
turn it on 2 minutes later.
Replace the water-level switch.
The unit is operating normally.
NO