Samsung RS 24 Service Manual page 47

Diagnostics
10-2) If the compressor and cooling fan motor don't work normally
Refer Page 30
Did buzzer sound on forced operation?
(Check certainly after forced start.)
NO
Exchange MICOM and PCB.
NO
Exchange and repair IC03.
(ULN2803)
Apply Ref. 2
Start
Did 5 min pass after COMP. OFF?
YES
Does compressor work
with forced operation?
NO
Apply Ref.4
Is MICOM No.18 High?(5V)
YES
Is the voltage of IC03 pin No. 14 between 0-1V?
YES
Is COMP relay normal?
YES
Is the contact of connector CN70 normal?
YES
Is COMP assembly normal?
YES
Normal
NO
Check after a lapse of 5 min.
YES
Is freezer sensor normal?
YES
Is the temp. sense
of main PCB Normal?
YES
Open and troubleshoot the
connection.
NO
Exchange or troubleshoot
COMP relay.
NO
Insert connector completely?
NO
Exchange and repair COMP.
assembly.
47
NO
Open and repair the
connection.
NO
Troubleshoot the
sensor and Exchange
PCB.