Mike Dolt Enterprises
Mike Dolt Enterprises
User: Sam Moore, Location: SC
Asked on: Thursday, April 21, 2011 at 5:10 pm EDT
Answered on: Tuesday, May 14, 2024 at 4:30 am EDT
Question: Ok, I'm at wits end with an ATS that I'm trouble shooting...-Briggs and Stratton 200 Amp ATS with Service Disconnect and AC Control Moduleconnected to a 12 kw B & S Generator- Utility power fails and switchs to gen and all is well, problem is Utility returns and ATS will not switch back to Utility. Control board LEDs indicate that both utility and gen power is present. Once Utility is restored the only way it will transfer back is shut Gen breaker of and it will switch back to Utility, other wise it will run Gen until fuel runs outHistory- I got involved after a surge hit ATS and this started...I replaced control board and transfering mechanism (solenoids and all) due to obvious burn marks on both...only parts left were fuses and breakers and ct's...generator and 240 volt sensing circuit check out fineI also installed a surge suppressor to help prevent future attacks from mother nature and the pocoWhat am I missing???
Troubleshooting Steps
1. Verify Proper Wiring
Ensure all wiring connections are tight and in accordance with the manufacturer's instructions. Check the wiring diagram carefully.
2. Inspect Control Board
Even though you replaced the control board, re-inspect it for any signs of damage or faulty connections. Check all solder joints and components with a multimeter.
3. Test CTs
Verify that the current transformers (CTs) are properly installed and sensing the utility and generator currents accurately. Use a multimeter to measure the voltage across the CT terminals.
4. Check Breakers and Fuses
Ensure that all breakers and fuses in the system are functioning correctly. Replace any blown fuses or tripped breakers.
5. Inspect Transfer Mechanism
Re-inspect the transfer mechanism to ensure it is functioning properly. Check for any binding or obstructions that may prevent it from transferring.
6. Test Voltage Sensing Circuit
Verify that the 240-volt sensing circuit is operating correctly. Use a voltmeter to measure the voltage at the appropriate terminals on the control board.
7. Reset the Control Board
If all other troubleshooting steps fail, try resetting the control board by following the manufacturer's instructions. This may clear any internal faults or software glitches.
Additional Considerations
Generator Output
Ensure that the generator is producing the correct voltage and frequency.
Demand Loads
Check if there are any excessive demand loads on the system that may be causing the ATS to remain on generator power unnecessarily.
Auto/Manual Switch
Verify that the ATS is set to automatic mode and not manual.*
Local Utility
Contact your local utility to determine if there are any issues with the grid that may be affecting the ATS's operation.
If all else fails, contact Briggs and Stratton technical support for further assistance. Flag for review