SDU AC-B Series
A272-353 Rev. 1 2/2021
14 |
P a g e
9.0 Troubleshooting
When the UPS is installed in a Class I, Division 2 Groups A B C D or Class I Zone 2 II C hazardous location,
adhere to the following:
Warning
—
Explosion Hazard
—
Do not disconnect the equipment while the circuit
is live or unless the area is known to be free of ignitable concentrations.
Warning
—
Explosion Hazard
–
Do not connect or disconnect the battery unless the area is known to be free
of ignitable concentrations.
Warning
—
Explosion Hazard
—
Do not open the unit. Do not substitute components. Do not replace fuse.
Trouble
Possible Cause
Solution
UPS nonresponsive
(No alarm and no
light)
UPS is powered off
Press ON/OFF button for TWO (2) seconds.
Ensure the Power Lock feature is disabled.
Battery is defective
Replace the battery.
UPS fault
Contact Tech support.
The UPS is always on
battery mode
Input may not be properly
connected.
Check the input connection.
Input fuse is open
Before reconnecting equipment, please verify
that the load matches the UPS capability
specified and output has short circuit
protection. Contact Tech support.
Actual backup time
cannot be achieved
Battery voltage is too low
Charge the battery at least eight (8) hours.
Overload
Remove some unnecessary loads. Before
reconnecting equipment, please verify that the
load matches the UPS capability specified in
spec.
Battery defect
Replace the battery.
UPS fault or charger
failure
Contact Tech support.
Fault code displayed
Overload
Remove some unnecessary loads. Before
reconnecting equipment, please verify that
the load matches the UPS capability
specified in spec.
UPS short-circuit
Contact Tech support.
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