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ENGLISH
ITYS 1-10 kVA - Ref.: IOMITYTWXX05-GB 00
20. TROUBLESHOOTING
Please have the following information at hand before calling the After-Sales Service Department:
• Model number, serial number
• Date on which the problem occurred
• LCD display status, Buzzer alarm status
• Utility power condition, load type and capacity, ambient temperature, ventilation conditions
• The information (battery capacity, quantity) of external battery pack if the UPS is an S model
• Other information for a complete description of the problem
IMPORTANT!
If problems persist or recur frequently after following the instructions in this chapter call the technical service
centre providing a full description of the problem.
WARNING
Problem Displayed Possible cause Remedy
Read EEPROM Error UPS internal fault Consult dealer.
Epo Active EPO connector is open Check the EPO connector status
On Maintain Bypass Maintain bypass switch is open
Check the maintain bypass switch status
IP softstart failed UPS internal fault Consult dealer
Site Wiring Fault Phase and neutral conductor at input of
UPS system are reversed
Reverse mains power wiring.
Battery Disconnect Battery pack is not connected correctly Do the battery test to confi rm.
Check the battery bank is connected to the UPS
Check the battery breaker is turned on.
Battery low Battery voltage is low When alarm sounds every second bat-
tery is almost empty.
Output Overload Overload Check the loads and remove some non-
critical loads.
Check if some loads have failed.
Fan Failure Fan abnormal Check if the fan is running normally.
Charger failure The charge fails Consult dealer.
Battery Over Voltage
Battery voltage is higher than normal value
Check if the battery quantity is right.
Over Charge Battery is over charged The UPS will turn off the charger until the
battery voltage is normal
Model Pin Error Internal UPS fault Consult dealer.
Ambient Over Temperature The ambient temperature is too high Check the environment ventilation.
Heatsink Over Temperature Inside temperature of UPS is too high Check the ventilation of UPS and the
ambient temperature.
Ambient NTC abnormal UPS internal fault Consult dealer.
Para Bat Differ The battery packs of some UPSs are dis-
connected
Check if all the battery pack is connected.
Para Line Differ
The mains input of some UPSs is disconnected
Check the building wiring and input cable.
Check if the input breaker is closed.
Ensure the UPSs are connected to same
input source.
IP Fuse Open Input fuse break Check the input fuse status
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