Samsung RM255BABB Training Manual page 63

DIAGNOSTIC
6-3) If the defrost function doesn't work
See test function in the manual.
Recheck the corresponding sensor for
an error if it fails in return.
Reference
If temp. of F, R defrosting sensors by the
heaters working are over 50
respectirely, operation of defrosting heaters is
over and return to normal operation after a
respite.
See 'Load Drive Circuit section' and
Ref. 2: How to check or failure
Start
Is defrosting sensor by
self-diagnosis normal?
Are all defrosting
heaters normal?
Is temperature of the correspondi n g
defrosting sensor below 23 ?
Perform forced defrosting for F
and R room one at a time.
Is power applied to the
respective defrosting heaters?
NO
Does return to the cool i n g operati o n
after heati n g for a speci f i e d peri o d?
Normal
63
Is the connection of terminal in
Main PCB normal?
Check temp. fuse, breakn of heater contact of
wire, and so on.
Exchange or troubleshoot the failure relay or
exchange PCB assembly.
65
62 62
NO
Exchange and troubleshoot the
YES
corresponding sensor.
NO
YES
Check temp. fuse, breaking of heater
contact of wire, and so on.
NO
Run forced operation for a
YES
NO
YES
YES
NO
Repair the connection of terminal.
YES
specified period.