A953_O: Coil Temperature Thermistor Failure
On the VSODC, this will be indicated by a number 83 on the seven segment LED display
The Drive LED's will not indicate anything
The Coil thermistor is crucial for heating mode on heat pumps. This fault indicates the coil thermistor has failed. Check the thermistor against the 10k thermistor chart and replace if necessary.
The unit should continue to run in the cooling mode with this fault but it should not be left alone.
