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DIAGNOSTIC
6-8) If Indoor Lamp of Freezer/Refrigerator doesn’t light
1. When replacing the indoor lamp of freezer or refrigerator, please turn the power OFF to avoid an electric
shock.
2. Please be sure to avoid a burn by the excessive heating of incandescent light bulb.
An example of F-Room Lamp is presented as follows.
And you may apply the same principle and method to the other indoor lamps.
Is the inside lamp filament broken?
Start
Replace
the inside lamp.
Is the control relay RY77
for the inside lamp in PCB normal?
Replace or troubleshoot
the door S/W.
Check the F and R-door S/W connections and
check/troubleshoot the inside lamp socket.
YES
NO
Replace or troubleshoot
control relay.
NO
NO
YES
Is the point of contact of the
F-DOOR S/W normal?
YES
Caution!
The indoor lamp relay performs turn-on/turn-off as
the door opens/closes. If indoor lamp doesn't
light up, check up the operation noise of relay.
The noise of relay operation will be heard
whenever opening/closing the door.
Please see ”10-4. Door SWITCH(S/W)” and “10-
4. AC LOAD Operation Circuit” in the “10-14.
Circuit Description” of manual, for the information
related to the inside lamp operation.
reference
If the door is opened, contact of door S/W is opened and voltage of 5V is applied to MICOM to
finally sense the Openness. If 5V is sensed more than 2 minutes afterwards, Door-Open alarm
will sound 'ding-dong' for 10 seconds every 1 minute. For that reason, if the door S/W has a
failure, refrigerator makes 'ding-dong' sound every 1 minute. Please take note of it during service.
Reference
7070