C450R User Manual
Page 28
Conditions
Possible cause
Action
Fan fault
Fan abnormal
Check if the fan is running normally
Site fault
Phase and neutral conductor
at input of UPS system are
reversed
Site Fault detection disabled by
default. It can still be enabled /
disabled from the LCD settings menu.
Reconnect all input wires.
Over temperature fault
Over temperature is too high,
UPS goes to bypass or
stopped.
Check the ventilation of the UPS and
check the ambient temperature.
Output short circuit
Output short circuit occurred.
Check the output of UPS and loads,
make sure the short circuit is removed
before turning on again.
APP cannot connect to
UPS
IoT is disabled
Enable IoT function in LCD
Your IT settings may block UPS
get cloud connected (NTP,
Proxy, etc.)
please refer to CertaUPs app help file
