APC Smart-UPS Error Code F12

APC UPS Critical Fault

Model: Smart-UPS | Code: F12

Applicable Systems
Symmetra LX

Symptoms

A short circuit has been detected on the UPS output. The output is immediately disconnected.

Possible Causes

  • Output wiring short circuit
  • Connected device internal short circuit

Troubleshooting Steps

  1. Step 1: Check the UPS fault log for the specific short circuit 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.

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

Category: UPS