Introduction
While ATS systems are highly reliable, they may face issues due to improper installation, poor maintenance, or aging components. Here’s how to troubleshoot common problems.
1. ATS Doesn’t Switch Automatically
Cause: Voltage sensing failure or delay setting too long
Solution: Check sensors and controller settings
2. Generator Fails to Start
Cause: Battery dead or signal not sent by ATS
Solution: Inspect battery, test signal circuit
3. ATS Makes Clicking Noise but Doesn’t Switch
Cause: Relay or contactor issue
Solution: Replace worn relays or contactors
4. Load Doesn’t Return to Utility Power
Cause: ATS fails to detect power restoration
Solution: Check monitoring circuit and utility line voltage
5. ATS Requires Frequent Manual Reset
Cause: Faulty controller or poor grounding
Solution: Replace controller, inspect grounding system
Maintenance Tips
Regular inspections
Test transfer functions monthly
Clean contacts and terminals
Conclusion
Proper diagnosis and regular maintenance can prevent most ATS issues. Stay proactive to keep your backup system reliable.
