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3. Fail to Defrost
Confirm the frosting of the cooler
more
frost
Is the coil circuit of D meter working?
Yes
Turn the pin of D meter to defrost side. Is the
circuit of defrost heater working?
No
Is the circuit at the defrost side of D meter
working?
Yes
Short circuit at the temperature switch, is the
circuit of defrost heater working?
No
Is the circuit of defrost heater working?
Yes
Is the circuit of temperature fuse working?
Yes
Is the circuit of water dripping tray working?
Yes
Clean the water and impurities in the water
dripping tray.
VII. FAILURE DIAGNOSIS
Lesser frost
No
Green & black circuit of D
meter
Yes
No
Green & black circuit of D
meter
Yes
No
No
No
Clearance of door knob and forget to close the
freezing chamber door.
Replace D meter (broken coil)
Defrost
Agent
Replace D meter (poor operation of D meter)
Replace D meter, (poor contacting point)
Replace the temperature switch.
Replace the defrost heater.
Replace temperature fuse.
Inspect the heater of water dripping tray.
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