5.2. Troubleshooting
The following tables show some possible problems and the best action to deal with them. In
case of doubts, please get in contact with your Nidec GA Application Engineer.
5.2.1. Compressor not trying to start
Compressor disconnected from the
Inverter.
Verify the Compressor Cable connection.
No control input signal or bad
connection.
Verify the control input cable connection and measure the signal
from the thermostat.
Inverter with blown fuse (due to
previous major failure).
Return the unit to the manufacturer, replacing it with a new
one.
Compressor with the motor
winding opened.
Measure the ohmic resistance between all pairs of pins on the
hermetic terminal. If the one winding is open (high impedance),
return the defective unit to the manufacturer, replacing it with a
new one.
Dropped, damaged, burnt Inverter.
Replace with a new one and test for confirmation;
Return the defective unit to the manufacturer;
Table 23 – Compressor not trying to start
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