24 | RT Series True Online UPS
7. Troubleshooting
When the system works in fault mode, the LCD displays as below:
25% 50% 75% 100%
25% 50% 75% 100%
Fault icon
Fault code
fault
Problem Possible Cause Solution
Fault icon display, audible
buzzer alarm continually,
the fault code is 00-14
Bus bar voltage
fault
Test the bus bar voltage
or contact the supplier
Fault icon display, audible
buzzer alarm continually,
the fault code is 15-24
Soft start fault
Check the soft start circuit,
especially the soft start resistance
or contact the supplier directly
Fault icon display, audible
buzzer alarm continually,
the fault code is 25-39
Inverter voltage
fault
Contact the supplier
Fault icon display, audible
buzzer alarm continually,
the fault code is 40-44
Over temperature
inside
overloaded, and the fan vent is not
obstructed, as well as the indoor
temperature is not high. Leave alone the
UPS 10 minutes for cooling, and restart
it. If the problem persists, contact the
supplier
Fault icon display, audible
buzzer alarm continually,
the fault code is 45-49
Output short-circuit
Turn off the UPS and disconnect all
the loads. Be sure there is no any
fault or internal short circuit of the
loads.
And then restart the UPS. If the
problem persists, contact the
supplier.
Fault icon display, audible
buzzer alarm continually,
thefault code is 50-54
Overload
Check the load level and disconnect the
non-critical equipments, recount the
total capacity of your load and reduce the
load to the UPS. Check whether the load
equipments has fault or not.
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