How to replace a Battery String?
Step 1 Ensure that the AC input power supply is normal.
Step 2 Switch off the battery circuit breaker.
Step 3 Replace batteries. Ensure that the positive and negative battery cables are properly connected.
Step 4 Switch on the battery circuit breaker.
Step 5 Wait until the system is powered on automatically. Check that the battery status is normal
(that is, no battery loop broken alarm is generated and the battery charging current is not 0.).