DIAGNOSTIC
6-3) If the defrost function doesn’t work
Start
Is defrosting sensor by
NO
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 sensors by the heaters working are over 50 63 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
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| Exchange and troubleshoot the | ||
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Are all defrosting |
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heaters normal? |
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Is temperature of the corresponding |
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defrosting sensor below 23 | ? |
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| Run forced operation for a | ||
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Perform forced defrosting for F
and R room one at a time.
Is power applied to the | NO | |
respective defrosting heaters? |
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Does return to the cooling operation after heating for a specified period?
YES
Normal
Is the connection of terminal in | NO |
Main PCB normal? |
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| YES | Repair the connection of terminal. | |
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Check temp. fuse, breakn of heater contact of |
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wire, and so on. |
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Exchange or troubleshoot the failure relay or
exchange PCB assembly.
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