Trouble Shooting According To Fault Indication - CyberPower OLS3S15KE User Manual

Bypass differ
Setting differ
ECO In Parallel

7.2. Trouble Shooting According to Fault Indication

Problem Displayed
Output short
Over load
Neg power fail
Over temperature
Fan fail
Back feed
DC short
DC over
The Main2 bypass input
of some UPS is
disconnected
different setting in
parallel system
ECO function is
enabled in parallel
system
Possible Cause
Output short circuit
Over load
The load is pure
inductive and capacitive
Inside temperature of
UPS is too high
Fan blocked or
disconnected over time
Output voltage is
returned to input
Bus short
Bus over voltage
Check the building wiring and input
cable. Check if the M2 breaker is
closed. Ensure the UPS are
connected to same input source
Check the setting
ECO function is forbidden in parallel
system
Remedy
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.
Check the loads and remove some
non-critical loads.
Check if some loads are failed.
Remove some non-critical loads.
Bypass supplies the load first, ensure
there is no overload, then turn on
UPS.
Check the ventilation of UPS and the
ambient temperature
Check the fan status
Consult dealer
Consult dealer.
Consult dealer.
32