User manual

B-1
Appendix B
Troubleshooting
This appendix describes causes and recommended solutions for possible UTS problems.
While operating on utility power, some of the loads keep shutting off
Possible Cause: One of the circuits may be in Security mode.
Solution: Check the circuits to ensure none of them are in Security mode.
Possible Cause: One of the circuits may be overloaded, as indicated on the LCD.
Solution: Reduce the load, or if necessary, have an electrician upgrade the circuit to 20A.
While operating on backup power, some of the loads keep shutting off
Possible Cause: Adaptive load management (ALM) may be active.
Solution: Ensure that the generator’s power rating is set correctly and is appropriately rated (under System
Configuration in Appendix B).
Possible Cause: A circuit that should not be shutting off is shutting off.
Solution: Change the circuit’s load type, or set
CKT1 DELAYABLE to NO.
Solution: Disabling the ALM can also cause the generator to overload.
Note The LCD screen will display any faults or warning conditions that occur along with
informational messages. If you are ever in doubt as to what action to take, please
contact APC Technical Support:
Internet — www.apc.com/support/
Phone — 800-555-2725
Note In the following possible causes and recommended solutions local electrical codes
and the National Electrical Code (NEC) must be followed in all cases.
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