APC UTS6H Troubleshooting, Problem and Possible Cause, Solution, Circuit Setup Delayable Circuits

Troubleshooting

Use this chart to solve minor UTS problems.

Refer to www.apc.com for assistance with complex UTS problems.

Problem and Possible Cause

Solution

Problem: While operating on utility power the UTS repeatedly drops some connected loads

Cause: One or more circuits may be in	Using the Circuit Setup button on the UTS, check to verify the status of
Security Mode.	Security Mode.
Cause: The LCD displays a message	Reduce the load on the affected circuits or have a qualified electrician
indicating that one or more circuits may	upgrade the circuit amp capacity.
be experiencing an overload condition.
Problem: While operating on backup power the UTS repeatedly drops some connected loads
Cause: ALM may be enabled.	• Disable ALM using the System Setup button.
	NOTE: When ALM is disabled overload conditions can occur causing a
	generator to stall, a circuit breaker to trip, or loads may experience
	severe low voltage conditions.
Cause: The circuit may be incorrectly	Use the Circuit Setup button to navigate to CKT DELAYABLE screen for
configured as delayable.	the circuit affected. Disable the circuit delayable option, (select NO). This
	disables ALM for that circuit. Repeat this process for all circuits affected.
Cause: The circuit may be incorrectly	Change the parameters for Maximum OFF and Minimum ON times, for
configured for MAX OFF and MIN	circuits supporting loads being adversely affected by drops.
ON.
Cause: The generator power rating is	Refer to System Setup: Backup1 Power Rating in this manual.
set too low.

Problem: While operating on backup power the generator stalls, shuts down or the circuit breaker trips repeatedly

Cause: The generator power rating is	Refer to System Setup: Backup1 Power Rating in this manual.
set too high causing an overload
condition.
Cause: The Generator Surge Overload	Refer to System Setup: Generator Surge Overload Delay Time in this
Delay Time is set too high.	manual.
Cause: ALM has been disabled	Enable ALM. Refer to these sections in this manual.
causing an overload condition for the	• System Setup: Load Shedding, and Time Management
generator.
	• Circuit Setup: Delayable Circuits

Operation Manual Universal Transfer Switch UTS6 UTS6H UTS6BI UTS10BI 13