Earth (ground) fault

What does #14 mean?

An earth (ground) fault has been detected, indicating an unintended current path from a phase conductor to the ground. This usually points to damaged insulation in the motor windings or associated cabling, posing a significant safety hazard and a risk of severe damage to the drive or compressor components.

Complete Troubleshooting Guide

1. 1

   Completely power OFF the unit and disconnect the main power cable from the compressor electrical box.

2. 2

   Perform an insulation resistance test on the compressor windings to ground using a 'megger' tester set at 500V.

3. 3

   If the measured insulation resistance is less than 500 KΩ, the fault is likely in the compressor; replace the compressor unit.

4. 4

   If the measured insulation resistance is greater than 500 KΩ, the fault is likely within the drive or its internal wiring; replace the drive unit.