Common faults of electric fittings
S/N
Fault description
Causes
Treatment
1
Freezer compartment
defrosting heater fault
Poor terminal connectors
Check each connecting terminal to ensure reliable connection
Defrosting heater fault
Use a multimeter to measure the resistance at both ends of the
heating tube, which should be about 285 Ω under normal conditions
Temperature fuse fault
Use a multimeter to measure both ends of the defrosting fuse, it
should be in conducting state
2
Unqualified grounding
resistance
The grounding wire screws of the
compressor are loose, or the
grounding wire screws of the
power cord are loose
Check the grounding of the compressor and tighten the screws；
Check the fastening of the power cord grounding screws
3
The whole machine has
no power after the power
cord is connected
The connector is loose
Check the connection of the corresponding connectors against the
physical wiring diagram
Main control board fault
Check the power input of the main control board. If the input is
normal, replace the main control board
4
Compressor does not
start
Poor terminal connection
Check the split inverter board’s signal lines, input voltage, output
voltage and the compressor connecting terminals with reference to
the physical wiring diagram, to see whether the connection is normal
Main control board fault
Detect the frequency conversion signal output end of the main
control board with an oscilloscope. If there is no output signal,
replace the main control board
Compressor fault
Under the condition that all the above are normal, remove the
triangle connector of the compressor, connect to a new compressor
and power it on. If the compressor starts normally, replace the
compressor
