ABB Conceptpower DPA 500 - Common Faults and Solutions

Modifications reserved
Page 71/94
8.2 Fault identification and rectification
The major alarm conditions that will be encountered are:
Table 12: Troubleshooting
ALARM CONDITION
MEANING
SUGGESTED SOLUTION
MAINS RECT. FAULT
Mains power supply is outside
prescribed tolerance.
The input power to UPS is too
low or missing.
If site power appears to be
OK, check the input circuit
breakers etc. supplying the
UPS.
MAINS BYP FAULT
Mains power supply is outside
prescribed tolerance.
The input power to UPS is too
low or missing.
If site power appears to be
OK, check the input circuit
breakers etc. supplying the
UPS.
OUTPUT SHORT
There is a short circuit at the
output of UPS (on load side).
Check all output connections
and repair as required.
OVERLOAD
Load exceeds the UPS rated
power.
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.
TEMPERATURE HIGH
UPS temperature has
exceeded the allowed value.
Check that the ambient
temperature of the UPS is less
than 40° C.
If the ambient temperature is
normal call the authorised
service centre for assistance.
INV. PHASE FAULT Inverter is faulty.
Call the authorised service
centre for assistance.
SYNCHRON. FAULT
The inverter and mains are not
synchronised.
The frequency of the input
voltage to the UPS is outside
operational limits and the UPS
static bypass has been
temporarily disabled.
BATTERY IN DISCHARGE
Battery is near end of
autonomy.
Shutdown load connected to
UPS before the UPS switches
itself off to protect its batteries.
MANUAL BYP IS CLOSED
Maintenance Bypass closed.
Load supplied by mains.
This alarm is only displayed if
the UPS is on Maintenance
Bypass.
In case of alarms not included in the list above, please contact the nearest authorised service centre
for assistance