Troubleshooting - Daewoo ERF-310A Service Information

14. TROUBLE SHOOTING
1. TROUBLE SHOOTING PROCEDURE OF THE BREAKDOWN
SYMPTOM CHECK POINT
LAMP OFF COMP OFF Power receptable
power plug
connectors
FAN ON COMP OFF Comp
PTC relay
running capacitor (R/C)
LAMP OFF COMP ON Component
Door switch
FAN OFF COMP ON Component
connectors
DEFROST PROBLEMS Heater
fuse
d-sensor/bi-metal
connectors
M-pcb
Timer
UNDERCOOLING Temperature control
closing/opening door
Food storage conditions
Food location
Location setting
Electric problems
Air circulation
Fan
Refrigerant
Lamp
OVER COOLING Temperature control
Food location
R-sensor,thermostat
Chilled case
CONFIRMATION PROCEDURE ON REFRIGERANT INSUFFICIENT
SYMPTOM DECISION
Complete leaking Remove louver a and b. No frost will be produced at the inlet of evaporator after
passing approximately 4 minute operation of the comp
Refrigerant insuficient 1) Frost condition: frost condition in the inlet pipe is extremely different from the
outlet pipe.
2) Measurement of the temperature: When the inside temperature is stable, a
CAUSE
Power failure
Connection is not good
Housing connector bad assy, with URT, terminals bent
Short circuit on coil
Bad connection, bad assembled
Bad connection, bad assembled
Lamp broken or bad assy
Door switch broken or bad assy
Fan motor broken, fan obstruction replace it
Housing connector bad assy, with URT, terminals bent
Component broken
broken (find broke down reason)
incorrect open/close temperature
Housing connectors bad assy, with URT, terminals bent
htr relay broken
timer broken or bad connection
The control button setting is not proper
Closing/opening door is too frequent, or door is open
Excesive storage
Hot food has been stored
Food close outlet air ducts
Ref is located under direct sun light or heat.
Surrounding is blocked (no gap between walls)
Compressor, sensor, thermostat problems
Air ducts obstruction
Fan broken or obstructed
Low charge
Gas leak
Lamp always on because door switch problems
The control button setting is not proper
The wet food is placed in front of the outlet of the duct
Componet broken or disadjusted
(Chilled case has 0ºC under specification)
5ºC temperature difference occurs between the inlet pipe and the outlet pipe.
27
ACTION
Adjust
Adjust
Replace comp
Adjust
Adjust
replace it
Adjust
Adjust
replace it
replace it
replace it
adjust
replace it
Adjust
set temp
close door
Arrange
Prevent this
Reorganizate food
Move it
Move it
General inspection
Clean and repair
Replace it
Recharge
Repair/recharge
Adjust
set temp
Reorganizate food
replace
REPAIRS
- Check for a
leakage after
vacuumming
- Inject proper
amount of
refrigerant