Load Relay Fault

What does CrF mean?

A fault detected in the load relay, often related to capacitor charging. This can prevent the drive from energizing its DC bus properly or switching the output, leading to a failure to start or maintain operation and potential damage to internal components.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Check the DC bus capacitor bank for signs of damage, leakage, or bulging.

2. 4

   Measure the resistance across the relay contacts when de-energized to ensure they are open.