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Diagnostics
11-3) If defrost function
Is F, R defrosting sensor by
self-diagnosis normal?
Start
Exchange and troubleshoot the
corresponding sensor.
See Ref. 3: ‘Check load’ in the manual.
Make decision on the basis of ref. 4 and
6 in the manual.
See test function in the manual.
Recheck the corresponding sensor for
an error if it fails in return.
See ‘Load Drive Circuit section’ and
Ref. 2: How to check failure of relay.
Is F, R Room defrosting heater normal?
Check temp. fuse,
breaking of heater wire, contact of
wire and so on.
Is temp. of the defrosting
sensor below 23℉?
Run forced operation for a
specified period.
Repair the connection terminal.
Perform forced defrosting for F and
R room at a time.
Normal
Check temp. fuse, breaking of heater wire,
contact of wire, and so on.
Exchange or troubleshoot the failure relay or
exchange PCB ass’y.
Is power applied to the
respective defrosting heaters?
Does the system
return to cooling operation after heating
for a specified period of time?
Recheck the connection
terminal in Main PCB
NO
NO
YES
YES
NO
YES
NO
NO
NO
YES
YES
YES
If temp. of F, R defrosting sensor by the
working of heater are over 50℉, 63℉
Reference