Danfoss VLT Alarm 27: Brake chopper fault

Danfoss Electrical Alarm Drive

Model: VLT 2800 / FC Series | Code: 27

Applicable Systems
FC-302 FC-301

Symptoms

Internal brake control transistor shorted.

Possible Causes

  • Brake chopper fault

Troubleshooting Steps

  1. Step 1: Check brake chopper circuit; replace power unit if damaged.
    Fault resolved after action

How to Reset

Reset by: 1) Correct the fault condition. 2) Press RESET button or cycle power. 3) Verify fault does not recur.

Related Danfoss Fault Codes

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Source: Danfoss FC Series Alarm Codes (agilectrl.com)

Category: Electrical