50
4. TROUBLESHOOTING
4-16) When the internal lamp of the freezer/fridge does not Lighting up
Start
Check and repair F, R-DOOR,
home bar S/W connector and
socket for internal lamp
NO(LED LAMP)
Replace lamp
YES
YES
YES
Check REED S/W or
check whether door and
home bar switch normally
NO
Replace PBA and Relay
Replace LED LAMP PBA
※
Reed S/W : Open
when door is open
Short when door is
closed.
Check REED S/W or
check whether door and
home bar are switching
normally
Check wire disconnection,
check DC 12V output
Measure voltage between CN78 #1 and
#2 when opening the F-Door
Measure voltage between CN78 #3 and
#5 when opening the R-Door
NO
NO
NO
YES
NO
YES
YES
Is it a Lighting bulb?
Is the Reed S/W operating
normally?
Is the output
of LED-LAMP 12V when Door is
open?
Is the filament of
the intermal lamp blown?
Is the Door and
Home bar Reed S/W operating
normally?
Relay for lamp
control on PBA is normal?
1. Turn off the power for repair because there is risk of electric shock when replacing the internal lamp.
2. Please keep in mind you could get burnt by the excessive heating of an incandescent Lighting bulb.
Internal lamp RELAY switches ON/OFF as the DOOR is OPEN/CLOSE.
When the internal lamp is not on, check the operating noise of the RELAY.
RELAY operation noise is generated every time as the DOOR is OPEN/CLOSE.
Caution
1.
When the DOOR is open, the DOOR S/W becomes OPEN. Micom senses 5V from Door S/W and recognizes
that the Door is open. If 5V has sensed for more than 2 minutes, buzzer will sounds “DingDong” every 1 minute.
Therefore, if the DOOR S/W is defective, it can generate the “Ding Dong” sound every 1 minute.
2. ON/OFF control of the internal lamp is linked with the DOOR S/W.
Reference
Reference
<Lighting bulb control method>
Model with Lighting bulb
applied
Model with Lighting bulb applied
Fridge internal lamp
RY76
Freezer internal lamp
RY75
On : Fridge door is open or
Fridge HomBar is open
On : Freezer door is open or
Freezer HomBar is open
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