35
Alarm
Possible Cause
Action
VDC NOK alarm is present
Any of the DC bus voltages
approaches its lower or upper
limits
May mean that the batteries have
approached to their lower voltage
limit and are almost empty.
Charge the batteries, and check if the alarm has
removed.
AMB OVTE alarm is
present
Ambient temperature exceeds its
upper limit
Measure the ambient temperature near UPS.
Make sure that the temperature is in specified
limits.
GEN ON alarm is present
Generator friendly operation is
activated (digital input “GEN
ON” is set high)
Check the "GEN ON" input
UPS OFF alarm is present
Emergency stop is activated
(digital input “UPS OFF” is set
high)
Check the "UPS OFF" input
BATT FAILED alarm is
present
Batteries failed in the battery test
Perform the test again when the batteries have
been charged for a long time and the battery
circuit breaker is "I"/"ON"
Check if the alarm continues
BATT C. OPEN alarm is
present
(A difference between
battery & DC bus voltage is
present )
Battery circuit breaker (F5) is
probably open ("0"/"OFF")
Make sure that the battery circuit breaker is
"I"/"ON". If not do the following:
-Check the rectifier preference and enable the
rectifier.
-Make sure that the input mains voltage is in
specified limits.
-Make sure that the UPS has switched to
normal mode and close the battery circuit
breaker.
The battery circuit breaker of the
external battery cabinet is open
("0"/"OFF")
Make sure that the battery circuit breaker of the
external battery cabinet is "I"/"ON". If not do
the following:
-Check the rectifier preference and enable the
rectifier.
-Make sure that the input mains voltage is in
specified limits.
-Make sure that the UPS has switched to
normal mode and close the battery circuit
breaker.
Battery fuses of the battery circuit
breaker (F5) or the external battery
cabinet may have blown
Check if the battery fuses are blown. Replace if
necessary (see maintenance section)
There is no battery in the system
Batteries shall be supplemented. Consult
technical service
