I have A Definity G3R with an EPN cabinet that is throwing a POWER alarm. The failures during testing point to the Battery charger and/or batteries. I have replaced both as well as the MAINTENANCE circuit pack TN775B. I have also installed their batteries and charger in our shop and did not get an alarm. I have done a RESET SYSTEM 1 and 2 on their switch and still can not get rid of their alarm. ANy ideas?