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43
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Alarm Code:04
conductor at input
of UPS system are
reversed
180° or connect UPS system.
EPO active
Alarm Code:71
EPO function is
enabled
Turn off the EPO switch.
Bus fault(Low/high/
Unbalance /Soft start)
Alarm Code:
22/21/23/25
UPS internal fault
Consult dealer
Inverter
fault(Low/high/soft
start)
Alarm Code:33/32/34
UPS internal fault
Consult dealer
Over temperature fault
Alarm Code:81
Over temperature
Check the ventilation of the
UPS, check the ambient
temperature and ventilation.
NTC open
Alarm Code:87
UPS internal fault
Consult dealer
Inverter short
Alarm Code:31
Output short
circuit
Remove all the loads. Turn off
the UPS. Check whether the
output of UPS and loads is
short circuit. Make sure the
short circuit is removed, and
the UPS has no internal faults
before turning on again.
Bus short
Alarm Code:24
UPS internal fault
Consult dealer
Please have the following information at hand before calling the NEXT UPS
Systems After-Sales Service Department:
1. Model number, serial number
2. Date on which the problem occurred
3. LCD display information, Buzzer alarm status
4. Utility power condition, load type and capacity, environment temperature,
ventilation condition
5. The information (battery capacity, quantity) of external battery pack if the
UPS is “S” model
6. Other information for complete description of the problem
