Fault Identification And Rectification - ABB DPA UPScale ST40 User Manual

9.2.3 Fault identification and rectification

The major alarm conditions that will be encountered are:
ALARM CONDITION
MAINS RECT. FAULT
MAINS BYP FAULT
OUTPUT SHORT
OVERLOAD
TEMPERATURE HIGH
INV. PHASE FAULT
SYNCHRON. FAULT
BATTERY IN DISCHARGE
MANUAL BYP IS CLOSED
In case of alarms not included in the list above, please contact the nearest certified service center for
assistance.
Modifications reserved
Page 75/79
MEANING
Mains power supply is
outside prescribed tolerance.
Mains power supply is
outside prescribed tolerance.
There is a short circuit at the
output of the UPS (on the
load side).
Load exceeds the UPS rated
power.
UPS temperature has
exceeded the allowed value.
Inverter is faulty.
The inverter and mains are
not synchronized.
Battery is near end of
autonomy.
Maintenance bypass closed.
Load supplied by mains.
SUGGESTED SOLUTION
The input power to the UPS is
too low or missing.
If site power appears to be
OK, check the input circuit
breakers, etc. supplying the
UPS.
The input power to the UPS is
too low or missing.
If site power appears to be
OK, check the input circuit
breakers, etc. supplying the
UPS.
Check all output connections
and repair as required.
Identify which piece of
equipment is causing the
overload and remove it from
the UPS.
Do not connect laser printers,
photocopiers, electric heaters,
kettles, etc. to the UPS.
Check that the ambient
temperature of the UPS is less
than 40° C.
If the ambient temperature is
normal, call the certified
service center for assistance.
Call the certified service
center for assistance.
The frequency of the input
voltage to the UPS is outside
operational limits and the UPS
static bypass has been
temporarily disabled.
Shutdown load connected to
the UPS before the UPS
switches itself off to protect its
batteries.
This alarm is only displayed if
the UPS is on maintenance
bypass.