socomec ITYS - Overload and Short Circuit Faults; Power Supply and Indicator Status

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ITYS 1-10 kVA - Ref.: IOMITYTWXX05-GB 00
20. TROUBLESHOOTING
FAULT
Problem Displayed Possible cause Remedy
Inv Overload Fault Overload Check the loads and remove some non-
critical loads.
Check if some loads have failed.
Byp Overload Fault Overload
Check the loads and remove some non-
critical loads.
Check if some loads are failed.
Output Short Circuit Output short circuit Remove all the loads. Turn off the UPS.
Check if UPS output and loads have
short circuited
Ensure short circuit is removed before
turning on again.
Heatsink Over Temperature Fault Internal UPS temperature of UPS high Check UPS ventilation of UPS and am-
bient temperature.
Bus Over Voltage Internal UPS fault Consult dealer.
Bus Under Voltage Internal UPS fault Consult dealer.
Bus Unbalance Internal UPS fault Consult dealer.
Bus short Internal UPS fault Consult dealer.
Bus Softstart Fail Internal UPS fault Consult dealer.
Inv Over Voltage Internal UPS fault Consult dealer.
Inv Under Voltage Internal UPS fault Consult dealer.
Inv Softstart Fail Internal UPS fault Consult dealer.
Negative Power Fault
The load is pure inductive and capacitive Remove some non-critical loads.
Bypass supplies the load fi rst, ensure
there is no overload, then turn on UPS.
Fan lock fault Fan blocked or disconnected over time Check the fan status
Backfeed Output voltage has returned to input Consult dealer
OTHER CASES
Problem Displayed Possible cause Remedy
No indication, no warning tone even
though system is connected to mains
power supply
No input voltage
Check the building wiring and input cable.
Check if the input breaker is closed.
BYPASS LED lights up even though the
power supply is available
Inverter not switched on Press On-Switch “I” to turn on UPS.
BATTERY LED lights up, and alarm sounds
every 4 seconds
Input voltage and/or frequency are out of
tolerance
Check input power source.
Check the building wiring and input cable.
Check if the input breaker is closed.
Emergency supply period shorter than
nominal value
Batteries not fully charged / battery defect Charge the batteries for at least 12 hours
and then check capacity.