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5
MAINTENANCE
5.1 Run Time Testing
Run Time Testing (Continued)
Subtract the
shutdown time from
the available backup
time.
This is the available
battery reserve time.
Shutdown Mode Time
Switch the input
circuit breaker ON.
Line power is
provided to the loads
and the battery starts
recharging.
Let the UPS go into
shutdown mode
(LEDs are sequen-
tially flashing).
Record the time this
happens
Available Battery Reserve
Time = Available Backup Time–
Shutdown Mode Time