Product Manual A

6. Troubleshooting 11-2017
94 0962-0131 (Issue 6)Copyright © 2017 Cummins Inc.
TABLE 9. CONTROL PANEL LED INDICATORS
Indicator Definition
Utility (Normal) Power
Available
This indicator lights when the utility source voltage sensor has determined that Utility
power is available and is within acceptable voltage limits.
Utility (Normal) Power
Connected
1. Lights constantly when the transfer switch is connected to Utility Power.
2. Is off when the transfer switch is not connected to Utility Power.
3. Blinks twice per second when the transfer switch has failed to connect to or
disconnect from Utility Power when commanded.
Genset (Emergency) Power
Available
This indicator lights when the generator source voltage sensor has determined that
generator power is within acceptable voltage and frequency limits.
Genset (Emergency) Power
Connected
1. Lights constantly when the transfer switch is connected to Genset Power.
2. Is off when the transfer switch is not connected to Generator Power.
3. Blinks twice per second when the transfer switch has failed to connect to or
disconnect from Genset Power when commanded.
Exerciser Enabled The following describes the Exercise Enabled LED when an exercise is enabled.
1. Lights constantly when integrated repeat exercise periods have been set.
2. Blinks twice per second when the Set Exercise button is pressed and held to set
or cancel an integrated exercise period.
3. Blinks once per second when an integrated or external exercise period is active.
4. Is off when no integrated repeat exercise periods are set.
Active Test
1. This indicator blinks at two times per second rate during the two seconds that
the Test button is pressed to acknowledge that a test has been activated or
when the remote test input is grounded.
2. The indicator lights constantly during the test and goes out once the test is
completed or normal power has failed.
6.2 Troubleshooting
WARNING
Some ATS service procedures present hazards that can result in severe personal injury or death.
Only trained and experienced service personnel with knowledge of electricity and machinery
hazards should perform service. See Safety Precautions.
Diagnosis of problems involves observing system operation. If you cannot determine the problem, contact
Cummins/Onan Service.
WARNING
AC power within the cabinet and the rear side of the cabinet door presents a shock hazard that
can cause severe personal injury or death. Whenever the cabinet door is open, use extreme
caution to avoid touching electrical contacts with body, tools, jewelry, clothes, hair, etc.
Several of the steps listed on the following pages include checking on the control panel settings. To check
the control settings, open the transfer switch door and slide the selector switch on the back on the control
panel to the Configuration Mode position.