Search FAQs

What are the basic troubleshooting steps for the Universal Transfer Switch model UTS6 / UTS6BI?

Issue:

What are the basic troubleshooting steps for the Universal Transfer Switch model UTS6 / UTS6BI?

Product Line:

APC Universal Transfer Switch

Environment:

UTS6 / UTS6BI, All Serial Numbers

Cause:

During normal operation, you may find your UTS not functioning as expected. This may be due to a malfunction, configuration issue, or the install environment.
This document will assist you with basic troubleshooting steps.

Resolution:

Problem and Possible Cause	Solution

Problem: The UTS conduit is too long or too short
Cause: The UTS was not installed at the recommended one foot distance from the building circuit breaker panel.	Conduit too long: have a licensed electrician cut the conduit to shorten the length.Conduit too short: have a licensed electrician add conduit to the existing conduit utilizing the proper use of wire nuts and junction boxes. Adhere to all national and local electrical codes.

Problem: The amperage of a circuit must be changed to accommodate the connected load
Cause: A 15 A fuse is installed in the circuit, but the connected load requires the use of a 20 A fuse. Cause: A 20 A fuse is installed in the circuit, but the connected load requires the use of a 15 A fuse.	Remove the UTS cover and replace the existing fuse with a fuse of correct amperage. Use the Circuit Setup button to reset the affected circuit. Failure to reset the amperage for the affected circuit will cause nuisance circuit tripping, or a UTS overload condition.

Problem: The UTS does not turn on
Cause: Incorrect wiring to circuits.	UTS6/UTS6H - Utilizing all of the UTS circuits is not necessary. However, Circuits 5 and 6 must be connected to the building circuit panel and must receive power from opposite phases for the UTS6 to function (UTS6H is 120vac Input ONLY). UTS6BI/UTS10BI - Utilizing all of the UTS circuits is not necessary. However, the dedicated 240 Vac circuits must be connected to the building circuit panel and must receive power for the UTS to function.

Problem: The UTS does not receive power from the generator
Cause: The generator has been incorrectly connected to the UTS.	Check to be sure the correct wiring configuration has been used.
Cause: The generator output is not 120 Vac/240 Vac single phase. This is not applicable to the UTS6H as it is 120vac Input ONLY.	Check the specifications of the generator. Only 120 Vac/240 Vac single phase generators can be used with the UTS.

Problem: The UTS does not receive power from the UPS
Cause: The UPS is overloaded and has shutdown.	Disconnect the circuits set as uninterruptible one at a time until the UPS begins operating.

Problem: The load does not receive power during a power outage
Cause: A UTS configuration error is present.	Check the UTS system and circuit configurations and correct any errors. Common errors include: •Circuits set as uninterruptible when there is no UPS connected to the UTS. •ALM is enabled and the settings are out of specified range. Refer to the Operation Manual for details on ALM settings.

Problem: UTS configuration errors are found
Cause: Initial UTS configuration is found to be incorrect.	•Reset the UTS to the factory defaults and begin the setup process again.Use the System Setup button to scroll through the system setup options. Stop at RESET TO FACTORY DEFAULTS. Use the down/up arrow keys to start the Setup Wizard.

Problem: A circuit is mislabeled while using the Setup Wizard
Cause: An error is made while configuring the UTS circuits.	•Reset the UTS to the factory defaults and begin the setup process again.Use the System Setup button to scroll through the system setup options. Stop at RESET TO FACTORY DEFAULTS. Use the down/up arrow keys to start the Setup Wizard. •Change the circuit labels. Refer to Circuit Configuration and Setup in the Operation Manual for details.

Problem: The circuit switches click on and off as power is supplied intermittently to some loads
Cause: The neutral wire is missing or configured incorrectly.	Connect the neutral wire correctly.

Problem: There is no power to some loads while operating on utility power, and the overload warning appears on the LCD
Cause: The current going through the UTS exceeds the maximum rated specifications.	Reduce the load.