Samsung RS257BABB Service Guide - Page 47

If defrost function

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Diagnostics 11-3) If defrost function � See Ref. 3: 'Check load' in the manual. � Make decision on the basis of ref. 4 and 6 in the manual. Start NO Is F, R defrosting sensor by self-diagnosis normal? YES NO Is F, R Room defrosting heater normal? YES Is temp. of the defrosting NO sensor below 5? YES Exchange and troubleshoot the corresponding sensor. Check temp. fuse, breaking of heater wire, contact of wire and so on. Run forced operation for a specified period. � See test function in the manual. NO � Recheck the corresponding sensor for an error if it fails in return. Reference If temp. of F, R defrosting sensor by the working of heater are over 50℉ Perform forced defrosting for F and F Room at a time. Is power applied to the NO respective defrosting heaters? YES Does the system return to cooling operation after heating for a specified period of time? YES Normal Recheck the connection NO terminal in Main PCB YES Check temp. fuse, breaking of heater wire, contact of wire and so on. Repair the connection terminal. � See 'Load Drive Circuit section' and Ref. 2: How to check failure of relay. Exchange or troubleshoot the failure relay or exchange PCB ass'y. 47

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47
Diagnostics
11-3) If defrost function
Is F, R defrosting sensor by
self-diagnosis normal?
Start
Exchange and troubleshoot the
corresponding sensor.
²
See Ref. 3: ‘Check load’ in the manual.
²
Make decision on the basis of ref. 4 and
6 in the manual.
²
See test function in the manual.
²
Recheck the corresponding sensor for
an error if it fails in return.
²
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 5?
Run forced operation for a
specified period.
Repair the connection terminal.
Perform forced defrosting for F and
F 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
℉
Reference