AEG PROTECT 1 LCD - Page 58

Problem Displayed
Problem DisplayedProblem Displayed
Problem Displayed Possible cause
Possible causePossible cause
Possible cause Remedy
RemedyRemedy
Remedy
Neg Charger Failure UPS internal fault
Consult Service
Bad Battery Count Unreasonable battery number
Check whether the actual
battery cell number is
consistent with the set value
Pos Bus Over Volt
UPS internal fault, the + DC
BUS voltage is too high
Consult Service
Neg Bus Over Volt
UPS internal fault, the -
DC BUS
voltage is too high
Consult Service
Pos Bus Under Volt
UPS internal fault, the + DC
BUS voltage is too low
Consult Service
Neg Bus Under Volt
UPS internal fault, the -
DC BUS
voltage is too low
Consult Service
Bus Unbalance
UPS internal fault, the voltage
difference between DC Bus+
and DC bus- is too large
Consult Service
Bus Short UPS internal fault Consult Service
Bus Soft Start Fail UPS internal fault Consult Service
Output Short circuit
abnormally low impedance
placed on its output and
considers it a 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
L1 Output Short circuit
L2 Output Short circuit
L3 Output Short circuit
Inverter Over Volt
UPS internal fault, the inverter
voltage is too high
Consult Service
Inverter Under Volt
UPS internal fault, the inverter
voltage is too low
Consult Service
Inverter Soft start Fail UPS internal fault Consult Service.
Inverter Overload Fault
Overload
Check the loads and remove
some noncritical loads;
Check if some loads are failed
Output Overload Fault
Byp Overload Fault
Inverter Capacity Open UPS internal fault Consult Service
Primary SPS Fail
UPS internal fault Consult Service
Assist SPS Fail
Emergency Off Perform emergency shutdown
Check the status of RPO
terminal
Internal Over Temp Fault
Inside temperature of UPS is
too high
Check the ventilation of UPS
and the ambient temperature
Byp SCR Over Temp
Charger Over Temp Fault
UPS Ambient Over Temp
The ambient temperature is
too high
Check the environment
ventilation
Fan Lock Fan abnormal Check if the fan is running