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Operation
If bypass thyristor is short (short circuit) and UPS runs in double
conversion mode (online) the following steps follow:
The backfeed relay opens and the message “backfeeder” is shown on the
LCD panel
Reset
To reset the backfeed logic the UPS device must be switched Off for some
seconds
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7. Trouble Shooting
If the UPS system does not operate correctly, first check the operating
information on the LCD display.
Please attempt to solve the problem using the table below. If the problem
still persists, consult your dealer.
7.1 Trouble Shooting According To Warning Indication
Problem Displayed
Possible cause
Remedy
Epo Active
Alarm code:71
EPO connector is open
Check the EPO connector status
On Maintain Bypass
Alarm code:72
Maintain bypass switch
is open
Check the maintain bypass switch
status
Battery Disconnect
Alarm code:11
Battery pack is not
connected correctly
Do the battery test to confirm.
Check the battery bank is
connected to the UPS.
Check the battery breaker is turn
on.
Battery low
Alarm code:12
Battery voltage is low
When audible alarm sounding
every second, battery is almost
empty.
Output Overload
Alarm code:41
Overload
Check the loads and remove some
non-critical loads.
Check if some loads are failed.
Fan Failure
Alarm code:84
Fan abnormal
Check if the fan is running
normally.
Charger Fail
Alarm code:15
The charge fails
Consult dealer.
Over Charge
Alarm code:14
Battery is over charged
The UPS will turn off the charger
until the battery voltage is normal
Model Pin Error
Alarm code:92
UPS internal fault
Consult dealer.
