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Diagnostics
11-2) If the compressor and cooling fan motor don’t work normally
Apply Ref.4
Did 5 min pass after COMP. OFF?
Start
Check after a lapse of 5 min.
Did buzzer sound on forced operation?
(Check certainly after forced start.)
Exchange MICOM and PCB.
Exchange and repair IC03.
(ULN2803)
Does compressor work
with forced operation?
Is MICOM No.18 High?(5V)
Open and repair the
connection.
Troubleshoot the
sensor and Exchange
PCB.
Is the voltage of IC03 pin No. 14 between 0-1V?
Open and troubleshoot the
connection.
Is COMP relay normal?
Exchange or troubleshoot
COMP relay.
Apply Ref. 2
Is the contact of connector CN70 normal?
Insert connector completely?
Is COMP assembly normal?
Exchange and repair COMP.
assembly.
Normal
NO
YES
YES
NO
NO
NO
NO
YES
NO
YES
YES
YES
NO
YES
NO
YES
NO
YES
Is freezer sensor normal?
Is the temp. sense
of main PCB Normal?