MGE UPS Systems 250A - Manual (Page 19)

34020201EN/AB - Page 19
4. Maintenance
4.1 Trouble-shooting and solutions
Alarm
WARNING
ALARM
OVER VOLTAGE
OVER CURRENT
AUX INPUT ALARM
Meaning
The current on the indicated output circuit is
between 60 and 80% of the maximum value
for the circuit.
The current on the indicated output circuit is
higher than 80% of the maximum value for
the circuit.
The voltage on the distribution system is
high.
The load on the PMM module is higher than
250A.
◗ Temperature rise in the isolation
transformer.
◗ Activation of the remote shutdown function.
Action
Monitor the power drawn on the circuit and
avoid adding other loads to the circuit.
Turn off certain loads connected to the
circuit until the fault disappears (after alarm
reset).
Monitor the voltage on the distribution
system. The connected loads may suffer
breakdowns.
Turn off certain connected loads until the
fault disappears (after alarm reset).
◗ Check the ventilation system in the room.
◗ Shut down the PMM module, then start it
up again when the remote shutdown signal
has been cleared.
Fault
No display
Incoherent measurement
values
LED 17 yellow
LED 17 red
Possible Causes
◗ Fuses F1 blown,
◗ Disconnector-fuse F1 open.
◗ Fuses F2 blown,
◗ Disconnector-fuse F2 open.
The current on at least one output circuit is
between 60 and 80% of the maximum value
for the circuit.
One of the following:
◗ The current on at least one output circuit is
higher than 80% of the maximum value for
the circuit,
◗ Overvoltage (>457V),
◗ Overcurrent (>250A),
◗ Transformer temperature too high,
◗ Actuation of remote shutdown function.
Action
◗ Call the MGE after-sales technical support,
◗ Close disconnector-fuse F1.
◗ Call the MGE after-sales technical support,
◗ Close disconnector-fuse F2.
Consult the list of alarms (alarm mode) and
reset the alarm.
Consult the list of alarms (alarm mode) and
reset the alarm.