VLT FC 102 HVAC Drive
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Feb 23, 2024 8:47 am
Cause : External interlock comes when a digital input signal is indicating a fault condition external to the adjustable frequency drive.
- An external interlock has commanded the adjustable frequency drive to trip.
- Clear the external fault condition.
- To resume normal operation, apply 24 V DC to the terminal programmed for external interlock.
- Reset the adjustable frequency drive.
