What does 77 mean?

An internal safety parameter fault, specifically a CRC (Cyclic Redundancy Check) error, has been detected within the R&M Materials Handling Frequency Converter. This indicates corruption or inconsistency in critical safety-related parameters, which could compromise safe operation.

• Internal safety parameter fault (CRC error)

Click steps to track your progress.

1. 1

   Switch off the supply voltage to the frequency converter

2. 2

   If the fault recurs after power cycling, replace the inverter