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MICOM Voltage
#49; F-Room,
#50; R-Room
DOOR OPEN : 5V
DOOR CLOSE : 0V
Diagnostics
8-6) When Alarm Sound continues without stop
1. When Door gets open, Door Open alarm ("Ding Dong") goes off in 2 minutes with Door opened.When Door
remains open after this, the alarm goes off every minute.
2. When Door Switch is not pressed well, MICOM considers it as opened and alarming sound goes off.
Room Lamp becomes OFF in 10 minutessince it detectsDoor Open (based on R600a).In this case, even though
Door gets opened, Room Lamp does not comes ON.
1) When “Ding Dong ” sound continues
Start
Chhange PCB / Check ON/OFF again
Note
Contact trouble of Connector,
Insert it again
Is insertion of MAIN
PCB Connector (CN30)
normal?
YES
NO
Repair DOOR S/W
pressing part
Does DOOR S/W come
in & out well?
YES
NO
Check wire of DOOR SWITCH
Is voltage of MICOM
#49,#50 according DOOR
SWITCH ON/OFF?
YES
NO
2) When “Beep Beep ” sound continues
Start
Check Lead Touch & foreign substances
around TEST S/W (MICOM #47)
Cancel Forced Operation/ Defrost
Is Forced Operation/
Defrost selected?
NO
YES
PCB is normal
Does buzzing sound go
off when plugging out
and plugging in again?
YES
NO