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© 2017 AMETEK Electronic Systems Protection / Technical Support: 1-800-645-9721 / espsurgex.com 27
9.
Troubleshooting
9.1 Troubleshooting Table
If the UPS does not function properly, resolve the problem by referring to the table below.
Symptom
Possible cause
Remedy
No warning or fault indication and no alarm even
though the mains is normal.
The AC input power cord
may not be firmly con-
nected to the input of the
UPS or to the mains.
Confirm that the AC input
power cord is firmly connected
to the input of the UPS and also
to the mains.
The AC input is con-
nected to the UPS output.
Plug the AC input power cord
firmly to the AC input.
The icon is flashing and the warning code
appears on the LCD display. The alarm
beeps once every second.
EPO function has been
activated.
Set pin 1 and pin 2 on the EPO
connector in a closed (shorted)
position to disable the EPO
function.
The icon is flashing and the warning code
appears on the LCD display. The alarm
beeps once every second.
The Line and neutral
conductors of the UPS
input are reversed.
Rotate the mains power socket
by 180° and then reconnect to
the UPS system.
The icon and are flashing and
the warning code appears on the LCD
display. The alarm beeps once every second.
The external or the inter-
nal battery is not con-
nected properly.
Check if all batteries are
properly connected.
Fault code is shown as 27 and the icon
appears on the LCD display. The alarm beeps
continuously.
The battery voltage is too
high or the charger may
be at fault.
Contact your dealer.
Fault code is shown as 28 and the icon
appears on the LCD display. The alarm beeps
continuously.
The battery voltage is too
low or the charger may be
at fault.
Contact your dealer.
The icon and are flashing
and the warning code appears on the
LCD display. The alarm beeps twice every sec-
ond.
UPS is overloaded.
Remove excess loads from UPS
output.
UPS is overloaded. De-
vices connected to the
UPS are fed directly by
the electrical network via
the bypass.
Remove excess loads from UPS
output.
After repetitive over-
loads, the UPS is locked
in the bypass mode. Con-
nected devices are fed
directly by the mains.
Remove excess loads from the
UPS output. Then shut down the
UPS and restart it.
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