Cause : Output wiring fault comes when a problem with the wiring connected to the drive's output terminals. This could be due to various issues like incorrect wiring, open circuit or short circuit, overload or ground fault.

"er7" fault in Fuji FRENIC-VG drive "Output wiring error". This means a problem with the output wiring connected to the drive. This fault suggests that there is an issue with the wiring between the drive and the motor, which could affect the drive's ability to control the motor properly.

Troubleshooting Steps:

1. Inspect Output Wiring:

   • Check all wiring connections between the drive’s output terminals and the motor. Ensure that the wires are securely connected and free from damage.
   • Verify that the wiring is correctly routed and connected according to the drive’s wiring diagram.

2. Check for Short Circuits:

   • Use a multimeter to check for short circuits between the output wires and ground, as well as between different phases.
   • Inspect the wiring for any signs of insulation damage or wear that could lead to short circuits.

3. Test for Open Circuits:

   • Use a multimeter to test continuity in the output wiring to ensure there are no breaks or open circuits.
   • Replace or repair any damaged wires or connections found during testing.

4. Verify Wiring Configuration:

   • Ensure that the wiring configuration matches the specifications provided in the drive’s manual or wiring diagram.
   • Confirm that the output terminals are correctly connected to the corresponding motor terminals.

5. Inspect the Motor:

   • Check the motor for any signs of damage, such as insulation breakdown or internal winding faults.
   • If possible, perform an insulation resistance test (megger test) on the motor windings to identify any potential issues.