Rev. Ref1010S025V0
Chapter 8 Trouble shooting
8-1. Common problems and solutions
8-1-1 Symptom: no defrosting
Check:
1) Remove the freezer 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 345Ω around.
3) Measure the resistance of the defrosting fuses. If they’re zero, the fuses are OK. If they’re infinite,
the fuses are malfunctioning.
4) If no malfunction is found in the above checks, please test the defrosting temperature sensor with a
multimeter.
8-1-2 Symptom: neither displaying nor starting when powering on
Check:
1) Check if the power supply is connected properly.
2) Remove the main control panel and examine its back side carefully to see if there are solder skips
or open soldering;
3) Check if the connector of the freezer door hinge is connected properly.
Solutions:
1) If there is dry soldering or open soldering on the control panel, resolder it with an electrical iron.
2) If any connector is not connected properly, replug it firmly.
8-1-3 Symptom: poor freezing effect accompanied by loud noise
Check:
1) Check if there is apparent abnormal sound in the freezer storage compartment. Remove the fan
cover plate, please first eliminate the possibility of improper installation.
2) If the freezer fan does not run, remove it and check if its connector are connected properly. Test if
there is approximately 11VDC voltage across pin2 and pin 3 of CN3. If there is no 11VDC voltage,
the main control panel can generally be determined to be malfunctioning. If there is 11VDC voltage,
the freezer fan can generally be determined to be malfunctioning.
3) If the fan rotates abnormally, the fan is malfunctioning.
Solutions:
（1）If there is apparent abnormal sound in the freezer storage compartment, check if the fan base is
firmly fixed, if the fan vanes are installed properly, and if they intervene with the wires. If any of these
problems is found, please remove the fan and reinstall it properly.
（2）If the fan connector is not installed properly, disconnect the terminals and reinstall the connector.
（3）If the main control panel or the fan is malfunctioning, replace the malfunctioning one with a good
spare part.
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