Danfoss VLT Alarm 4: Mains phase loss

Danfoss Electrical Alarm/Warning Drive

Model: VLT 2800 / FC Series | Code: 4

Applicable Systems
FC-302 FC-301

Symptoms

One phase missing from power supply input.

Possible Causes

  • Mains phase loss

Troubleshooting Steps

  1. Step 1: Check power supply voltage and all three phases are present.
    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

Source: Danfoss VLT 2800 Manual (sinodrive.com)

Category: Electrical