321144
43
Code Compressor
Status
Probable Root Causes Service Action
4 Flashes
(every 5
seconds)
OFF Compressor damaged /
system damaged.
¾ Check compressor input power.
¾ Check compressor winding resistance
across all three terminals of the
compressor fusite.
¾ Check for earth leakage (current)
between the fusite pins and frame shell
of the compressor.
If these resistances or leakage are out
of specification:
¾ Replace the compressor.
If the winding resistance is within
specification:
¾ Check the inverter and compressor
cabling for open circuit.
¾ Unplug the VCC from the power supply
and wait 2 minutes.
¾ Reconnect the VCC to the power supply
and wait for 12 minutes.
If the inverter still shows 4 flashes code
and the compressor is OFF:
¾ Replace the compressor.
LED OFF
(No LED
on)
OFF - No Input power signal.
- Inverter damaged.
¾ Check the input power signal (230
volts).
If there is no signal:
¾ Check the input power connection from
the power/control module.
If the voltage is within specification:
¾ Unplug the VCC from the power supply
and wait 2 minutes.
¾ Reconnect the VCC to the power supply
and wait for 12 minutes.
If the inverter has no LED showing and
the compressor is OFF:
¾ Replace the inverter.
If the inverter has no LED showing and
the compressor is ON:
¾ The diagnostic function of the inverter is
not working properly.
NOTE
• Before replacing the inverter or the compressor, check that there is no fault in the refrigeration system,
for example excessive head pressure on the high side, system over charged with refrigerant, blocked
capillary tube, etc.
• After each Service Action has been carried out, follow the next inverter LED fault indication.
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