
31
TROUBLESHOOTING
PROBLEM
DISPLAYED
POSSIBLE CAUSE
SOLUTION
Output short
Output short circuit
Remove all the loads. Turn off the UPS.
Check if UPS output and loads is short
circuit. Ensure short circuit is removed
before turning on again.
Over load
Over load
Check the loads and remove some non-
critical loads.
Check if some loads are failed.
Neg power fail
The load is pure inductive
and capacitive
Remove some non-critical loads.Bypass
supplies the load first, ensure there is no
overload, then turn on UPS
Over temperature
Inside temperature of
UPS is too high
Check the ventilation of UPS and the
ambient temperature
Fan fail
Fan blocked or
disconnected over time
Check the fan status
Back feed
Output voltage is
returned to input
Consult dealer
DC short
Bus short
Consult dealer.
DC over
Bus over voltage
Consult dealer.
DC under
Bus under voltage
Consult dealer.
DC unbalance
Bus unbalance
Consult dealer.
DC soft fail
Bus soft start fail
Consult dealer.
Output soft fail
Output soft start fail
Consult dealer.
Output volt low
Output voltage low
Consult dealer.
Output volt high
Output voltage high
Consult dealer.
PROBLEM
DISPLAYED
POSSIBLE CAUSE
SOLUTION
Work Mode Differ
There are different power
strategies setting in
parallel system
The UPS with different power strategy
setting (Ex. one Line mode and one
Converter mode) are forbidden to
parallel.
Rate Power Differ
There are different UPS
in parallel System
The UPS with different capacity (Ex. one
XRT6-6000(L) and one XRT6-10000(L)
are forbidden to parallel.
ECO In Para
ECO function is enabled
in parallel system
ECO function is forbidden in parallel
system.
Fuse Open
Input fuse break
Check the input fuse status.
Fault Indication