APC Smart-UPS Error Code F04

APC UPS Major Fault

Model: Smart-UPS | Code: F04

Applicable Systems
Symmetra LX

Symptoms

The bypass circuit has a fault. The UPS cannot transfer to bypass mode.

Possible Causes

  • Bypass contactor or relay failure
  • Bypass control circuit fault

Troubleshooting Steps

  1. Step 1: Check the UPS fault log for the specific bypass fault sub-code
    Detailed fault information is obtained
  2. Step 2: Contact APC support with the fault code for diagnosis
    Support confirms the faulty component

How to Reset

To reset: Power-cycle the UPS. If the error persists, contact APC support for repair.

Related APC Fault Codes

Comments (0)

Share your experience to help others facing the same problem.

No comments yet. Be the first to share your experience!

Leave a Comment

Source: APC Smart-UPS User Manual, Schneider Electric/APC

Category: UPS