04-3788_ABB_OPM_PVA11 6-10kVA-RT_EN_140423
Page 35/37 ABB
Modifications reserved
Alarm or Event
Possible cause
Remedy
ON Maintenance Bypass
Alarm Code: 72
UPS was manually switched to bypass and will
remain in bypass until manually transferred out
of bypass
Check the maintain bypass switch status
Heat sink Over
Temperature
Alarm Code: 81
Indicates that the temperature of heat sink is
too high indicating an over temperature of the
UPS.
Transfer the UPS to Bypass-mode. If the
condition persists, shut down the UPS. Clear
vents and remove any heat sources. Allow the
UPS to cool. Ensure the airflow around the
UPS is not obstructed. Restart the UPS.
Ambient Over
Temperature
Alarm Code:82
Indicates that the ambient temperature is
higher than the operation temperature on
specification
Change the positioning of the UPS or use an
adequate air conditioning system.
Fan Failure
Alarm Code:84
Indicates that the fan is not working properly.
Check fans of UPS
Back feed
Alarm Code:93
UPS has a unexpected bypass current on
battery-mode
Transfer to maintenance bypass and call
service.
Fatal Eeprom Fault
Alarm Code:A3
Indicates that the UPS could not read the
Eeprom successfully
Contact your service representative
Negative power Fault
Alarm Code: E1
Parallel system: power from one UPS flows
from the parallel output into the other UPS in
the system (negative power)
If the parallel system is in redundant-
mode, only the UPS with the failure will
transfer to fault-mode without output.
Other UPS will still support the load.
If the parallel system is not redundant
and the load cannot be supported by
the other UPS, all units in the parallel
system will transfer to fault-mode.
Parallel cable loss
Alarm Code: E2
Parallel system: Parallel cable disconnected
Connect the parallel cable
Parallel system battery
status
Alarm Code: E6
UPS1 batteries connected, UPS2 batteries
disconnected
Check battery connections
Line input different
Alarm Code: E7
Parallel system: UPS1 line ok, UPS2 line lost
Check the input line
Please have the following information at hand before calling the After-Sales Service Department:
1. Model number, serial number
2. Date on which the problem occurred
3. LCD/LED display information, Buzzer alarm status
4. Mains power condition, load type and capacity, environment temperature, ventilation condition
5. Information on external battery pack (battery capacity, quantity)
