APC SILCON 60-80KW 208/480V UPS - Manual (Page 25)

Alarms and Events
990-4035
User Guide APC Silcon 60-80kW 208V/480V UPS 25
5.3 Possible Alarms
NOTICE!
Please note mains = utility
Alarms Description Action
1. Peak current limiter active Peak current limiter activated and
UPS switched to bypass
operation.
System overload Check for blown fuses in
installation
2. Bypass power supply fault Fault in redundant PSU for
bypass. UPS still 100% able to
operate in all modes. Call for assistance
3. Delta current limiter active Input current limiter activated and
UPS switched to bypass
operation Check for overload.
If message is repetitive -
call for assistance
4. Faulty fan Blocked or faulty fan Remove blocking or replace fan
5. High DC warning Switching off big output load If alarm is repeated, reduce load
change
6. High DC shutdown UPS fault Call for assistance
7. Off-button activated Off button or emergency power
shut down activated –
8. Synchronization error UPS unable to synchronize with
input frequency Check if phase rotation of mains
input voltage is correct. If OK, call
for assistance
9. Inverter voltage error Inverter average voltage outside
limits (normal message during
system start-up/switch-off –
10. Parallel synchronization
error
Parallel UPS unable to
synchronize Check external parallel cables -
call for assistance
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 –