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Alarm or Notice Possible cause Remark / Action
UPS On Bypass
(Notice #169)
UPS has been manually or
automatically switched to
bypass operation.
The load is supplied with
voltage through the bypass
network.
System disturbances are
attenuated by passive filter
elements, but there is no
active control by the inverter,
i.e. a power failure would
mean the direct loss of
consumer power. If the system
automatically switches to
bypass operation, check if
there is
- Overheating or
- Overload or general
- UPS fault.
UPS on Battery
(Notice #168)
Intermittent Alarm
A utility failure has occurred
and the UPS is in battery
mode.
The UPS inverter feeds load
via the UPS internal battery.
Try to restore line voltage
(blown fuse in your
sub-distribution; if necessary,
refer to responsible electrician).
Battery
Disconnected
(Alarm #199)
Continuous Alarm
The UPS does not recognize
the internal batteries.
Switch off UPS voltage; check
for correct connection of UPS
and battery system.
If the condition persists,
contact your service
representative.
Voltage of the battery system
is not within the tolerance
window.
9.1.1 ALARM / ERROR MESSAGES