ALARM 126

Motor Rotating

Danfoss · VLT HVAC Basic FC 101

What does ALARM 126 mean?

A high back EMF voltage has been detected, indicating that the Permanent Magnet (PM) motor is rotating while the drive is attempting to control or start it. This can interfere with the drive's control algorithms and prevent a successful start.

Source: Danfoss VLT HVAC Basic FC 101

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