DMS-350A Battery Does Not Charge After Replacement

[Product_Support]

Issue

Two new batteries were installed in a DMS-350A panel, but neither charged to the point of indicating GOOD. The voltage measured at the battery clips with the battery installed reads approximately 4.5 VDC.

Product Line

TAC IA Series

Environment

DMS-350A

Cause

Poor physical connection between the battery and the battery holder contacts prevents proper charging.

Resolution

1. Inspect Battery Holder Contacts

   • Check for dirt, corrosion, or misalignment on the contacts.

2. Clean Contacts

   • Use a suitable contact cleaner or a lint-free cloth to remove debris.

3. Adjust Contact Position

   • Gently bend the battery holder contacts to ensure a firm and secure connection with the battery terminals.

4. Verify Voltage

   • After adjustment, confirm that the battery voltage rises above 4.5 VDC and eventually indicates GOOD status.