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Problems
Symptom
Causes
Checks
Measures
Remarks
Bad defrost.
Defrost is not
Defrost lead wire is cut.
Check if defrost lead wire is cut with a
Reconnect Lead
working,
tester.
Wire.
Defective defrost driving relay.
Check the voltage of CON5 (1 and 7)
Replace relay (RY 7
Refer to load
with a tester after pressing main
and RY 14) or PCB.
driving conditions
PCB test switch twice,
check in circuit
If the voltage is normal then it is OK.
explanation.
Defective defrost sensor parts.
Check the resistance of defrost sensor
Replace defrost
Refer to sensor
with a tester,
sensor,
resistance
characteristic
table of circuit
explanation.
Defective
Buzzer
Defective connecting
lead wire from
Check lead wire related to door
Repair lead wire,
buzzer
continuously
main PCB to door switch,
switch with a tester.
rings or door
Defective door switch parts.
Refer to door switch in parts repair
Replace door switch.
opening alarm
guide.
does not work.
Defective
Check input wire with a tester.
display button
Buzzer does
not ring and
key does not
sense even
button is
pressed.
Key input wire is cut or bad connector
terminal contact in main PCB and
display PCB connecting
lead wire.
Key is continuously
depressed due to
structural interference.
Disassemble
frame display and confirm
visually.
Reconnect
lead
wire and replace or
directly connect bad
contact terminal to
lead wire.
Adjust or replace
interfering
structures.
Refer to display
circuit in circuit
explanation.
F.
_u)
(/)
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