How to Troubleshoot a Voltage Regulator with a 9V Battery
We are coming into summer season when we see many voltage regulator failures due to extreme heat… Our own VP of Sales – David Vennie has a trick to save you money by quickly identifying if it’s a simple voltage regulator failure versus a major issue with your generator end.
This trick will help you determine if it is the voltage regulator or if it is something else major.
- Check the voltage on your main stator – ensure its reading at least residual voltage which is around 30V (>10V)
- Find your Voltage Regulator in the generator set (usually behind the control panel or in the generator end dog house)
- Locate your two exciter field wires usually labeled F1 & F2; F+ & F-; or + & –
- With the generator set running hook up your + & – to the 9V battery while still reading the voltage on your main stator with a mulitmeter
- We should see the voltage jump up to somewhere around your rated voltage (240V in this video). If it does, your voltage regulator is probably bad …
- If the voltage does not jump up, and you are sure you have the right exciter wires, you probably have a different problem in the generator end…