SERVICE MANUAL
Model:
44
Issue
Rev.
Chapter 10 Trouble shooting
10-1.Abnormal phenomena
Symptom:food in the fridge storage compartment is frozen
Check:
1) Verify that the temperature in the fridge storage compartment is too low and the food is
frozen there;
2) Disconnect the connection wires of the damper and the LED lamps. Take out the air
door-foam assembly. Tear the adhesive tape wrapped around the foam and separate the
foam. Check if the seal between the damper and the foam is tight.
3) If the seal is tight, check if the fridge storage temperature sensor R SNR is OK.
4) If the R SNR sensor R is OK, then the main control panel is probably malfunctioning.
5)If the wiring of the damper is OK, check the circuit from the connector of the main control
panel to the connector in the cabinet. If there is no problem in this circuit, the damper is
malfunctioning.
Solutions:
1) If the seal between the damper and the foam is found to be not tight, please affix seal strip
on the interface between the damper and the foam;
2) If the R SNR sensor is malfunctioning, please replace it with a new one;
3) If the main control panel is malfunctioning, please replace it with a new one;
4) If the connector of the damper is connected with reverse polarity, please reconnect it
correctly;
5) If the damper is malfunctioning, please replace it with a new one.
Symptom:no defrosting
Check:
1) Entering into “T2” mode by manually pressing keys on the display board. Then, check if the
temperature of the defrosting heating wire is rising.If the temperature of the heating wire
does not change, remove the fan cover plate to check if all the connectors are connected
properly and test if there is 220V voltage output across the terminals of the heating wire.
2) Measure the resistance of the heating wire with a multimeter. It should be around 268Ω.
3) Measure the resistance of the defrosting fuse. If it is zero, the fuse is OK. If it is infinite, the
fuse is malfunctioning.
4) If no malfunction is found in the above checks, please test the defrosting temperature
sensor with a multimeter.
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