APC Smart-UPS Error Code A020

APC UPS Major Alarm

Model: Smart-UPS | Code: A020

Applicable Systems
Symmetra LX

Symptoms

The battery voltage is too low. The battery may be deeply discharged or has failed.

Possible Causes

  • Battery deeply discharged from extended outage
  • Battery failed and cannot hold charge

Troubleshooting Steps

  1. Step 1: Check the battery voltage with a multimeter
    Voltage is below the minimum threshold
  2. Step 2: Recharge the battery or replace if it cannot recover
    Battery recovers or is replaced

How to Reset

To reset: Recharge or replace the battery, then restart the UPS.

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

Category: UPS