Applicable Systems
FRENIC
Symptoms
The FRENIC reports an external alarm input activation. An external fault signal was received, causing the drive to trip.
Possible Causes
- External safety device triggered the alarm input
- External alarm wiring fault causing false trigger
- External alarm contact configured for the wrong logic level
Troubleshooting Steps
- Step 1: Check the external alarm source and verify the safety device status
External alarm source identified - Step 2: Verify the alarm input wiring and contact configuration
Wiring is correct and logic matches configuration - Step 3: Clear the external alarm and reset the drive
External alarm is cleared and drive restarts
How to Reset
To reset: Clear the external alarm condition, then reset the fault.
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Source: Fuji FRENIC-Ace Inverter Manual, Fuji Electric Co.
Category: PLC & VFD
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