How to Troubleshoot Blown Panel Transformor D1640

Transformers on panels continue to blow after connecting to panel that has be without power for a day or more.

 

 

Battery backup on panel has developed internal short on it which causes panel to over draw current. Replace defective battery / batteries.

Part numbers D7212B, D9112B, D7212B1, D9112B1, D7212, D7412, D9112, D9124, D9412, D7212G, D7412G, D7412G, D9124G, D9412G, D7212GV2, D7412GV2, D7412GV2, D9124GV2, D9412GV2, D7212GV3, D7412GV3,D7412GV3, D9412GV3, D7212GV4, D7412GV4, D7412GV4, D9412GV4, B8512G, B9512G