Alarms and Events
990-4034
User Guide APC Silcon 10-40kW 208V/480V UPS 25
11. Inverter current limiter active Inverter overload Reduce UPS output load
12. Overload. Load exceeding
100%
UPS overload Reduce UPS output load
13. Second power supply fault UPS fault
(only systems > 160kW)
Call for assistance
14. Internal power supply fault UPS fault. Only bypass operation
possible
Call for assistance
15. Battery MCCB is off Battery MCCB/fuse not closed or
released
Close MCCB / insert new fuse. If
released again -
call for assistance.
16. **Q004 off** Output switch position for UPS in
parallel
–
17. **Q003 off** External bypass switch position –
18. **Q002 off** UPS output switch position –
19. **Q001 off** UPS input switch position –
20. High temperature of isolation
transformer
Temperature of isolation input/
output transformer, too high
Check fan, check for airflow
obstructions, check for overload
21. High temperature of main
static switch
Temperature of static input
switch, too high
Check fan, check for airflow
obstructions, check for overload
22. High temperature of bypass
static switch
Temperature of static bypass
switch, too high
Check fan, check for airflow
obstructions, check for overload
23. Main inverter failure Temperature of main inverter, too
high or inverter fuse blown
Check fan, check for airflow
obstructions, check for overload,
check fuse
24. High temperature of delta
inverter
Temperature of delta inverter, too
high
Check fan, check for airflow
obstructions, check for overload
25. Low DC shutdown Battery discharged to minimum
permissible level
Ensure battery recharging
26. Low DC warning Battery nearly discharged Save your data now
27. Mains momentarily outside
tolerance
Short disturbances on mains
supply (1 ms transients)
–
28. Mains outside tolerance Mains input voltage R.M.S. value
outside tolerance
–
29. Mains frequency outside
tolerance
Mains input frequency outside
tolerance
–
30. Bypass momentarily outside
tolerance
Short disturbances on bypass
voltage
–
31. Bypass outside tolerance Bypass input voltage outside
tolerance
–
32. Bypass frequency outside
tolerance
Bypass input frequency outside
tolerance
–
33. Output momentarily outside
tolerance
Short disturbance on output
voltage (inrush current)
If message reappears -
call for assistance