Datasheet

PRELIMINARY
UB20.241
U–Series
24V, 20A, DC-UPS
“Error” LED is on Check correct wiring between the battery and the DC-UPS
Check battery fuse. Is the battery fuse inserted or blown?
Check battery voltage (must be typically between 14.8V and 30.2V)
Check battery polarity
DC-UPS did not buffer Inhibit input was set
Battery did not have enough time to be charged and is still below the deep discharge
protection limit.
DC-UPS stopped buffering Deep discharge protection stopped buffering Æ use a larger battery, or allow
sufficient time for charging the battery
Output has shut down Cycle the input power to reset the DC-UPS
Let DC-UPS cool down, over temperature protection might have triggered.
DC-UPS constantly switches between normal mode and buffer mode
The supplying source on the input is too small and can not deliver sufficient current
Æ Use a larger power supply or reduce the output load
September 2012 / Rev. 1.3 DS-UB20.241-EN preliminary
All parameters are specified at an input voltage of 24V, 20A output load, 25°C ambient and after a 5 minutes run-in time
unless otherwise noted. It is assumed that the input power source can deliver a sufficient output current.
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