33
Alarm
Possible Cause
Action
INV BLKD alarm is present
Inverter operation is automatically
stopped due to a fault
Consult Technical Service
VSEC NOK alarm is
present
(Output voltage is beyond
its limits)
The UPS may not started up yet.
This alarm is permanent if the
UPS is intended to be started with
the bypass blocked or when the
bypass mains is not in specified
limits
Make sure that all circuit breakers is "I"/"ON"
Check if there is any other alarms and apply the
related suggestions
Examine the preferences, check the mains
voltages and read the "modes of operation"
section of the manual. Determine if the
combination of line voltages and preferences
does inhibit the UPS operation.
The UPS may have stopped to
feed the load because the
combination of the mains
conditions ant the user preferences
made from the COMMANDS
menu does not allow the UPS to
work in any of the operation
modes.(e.g. if inverter is disabled
and both input and bypass mains
voltages are not acceptable or if
the rectifier is disabled when the
bypass voltage is not in specified
limits or batteries may be
discharged during a prolonged
outage)
The output circuit breaker is
"0"/"OFF"
VIN HIGH alarm is present
Input line/neutral voltage is higher
than its upper limit
Check if the bypass mains voltage is in
specified limits
VIN LOW alarm is present
Input line/neutral voltage is lower
than its lower limit
IN SYN FLR alarm is
present
Frequency of mains voltage is
beyond the frequency range for
normal operation or mains voltage
is very low
Check if the mains voltage is in specified limits
IN SEQ FLR alarm is
present
Phase sequence of input mains
voltages is not OK
Phase sequence of the mains input shall be
changed. Consult technical service
RECT OVTE alarm is
present
Rectifier block temperature is very
high
Measure the ambient temperature near UPS.
Make sure that the temperature is in specified
limits.
Check if the fans are running.
RECT OVLD alarm is
present
RMS current drawn from any of
the input lines exceeds its nominal
value
Check if there is an overload and remove the
excessive load.
VDC HIGH alarm is
present
Any of the DC bus voltages is
higher than its upper limit
Consult Technical Service
VDC LOW alarm is present
Any of the DC bus voltages is
lower than its lower limit
Means that the batteries had
discharged. It is removed when the
rectifier resets.
If you encounter this alarm during start-up,
check if the inrush circuit breaker is "ON"/"I".
Charge the batteries, perform battery test and
check if the alarm has removed.
RECT BLKD alarm is
present
Rectifier operation is automatically
stopped due to a fault
Consult Technical Service
