Hello, folks. This is my first post here. I'm having trouble getting my geothermal system started on generator power. Below are some of the particulars on the equipment:
Total run hours: est. 50
Fuel source: LP:
Length of fuel run: 150 ft
Diameter of fuel pipe: 3/8"
Last maintenance date: 7-2019
Last valve adjustment date: 2017
Last battery replacement date: 2016
Error Code: N/A
Climatemaster Geothermal Unit
Install Date: 2006
Blower Mtr: FLA 7.0
Hyper Engineering Soft Start for Geo System
Install Date: 2016
I bought the generator used and installed it in early 2016 for selected circuits using a 0E7970 transfer switch. I was concerned that the geo system would be hard to start, so I installed the Hyper Engineering Sure Start soft start right from the beginning.
This system seemed to perform well enough. The generator could start the geo system and run it. You could hear the generator pull down some for a few seconds during the start, but that seemed reasonable to me.
The last couple of months I noticed that the generator won't start the geo system. I went through and looked at all the connections without any improvement. I'm getting a low voltage error from the Surestart unit, which, according to the manufacturer, occurs at 195VAC. It works just fine on utility power.
I attempted some measurements today. With only some lighting loads of 2-3Amps, the generator output was 247V and 61.5Hz. Each leg to neutral was pretty much even. I then powered the geo unit. Before starting the compressor, it ramps up the fan. The compressor failed to start and tripped on low voltage. I recorded it with a Fluke 189 meter and saw a minimum voltage of about 140. I don't know duration, but it was a fraction of a second.
The fan continues to run while the starter waits 3 minutes to make the next start attempt. During this time the fan continues.
After the failed start attempt, I noticed that the voltage had climbed to 276V. I didn't check each leg individually as I was concerned about damage. I turned off the geo breaker and my voltage returned to the 245-247 range.
I know that's a lot of info and there are surely some things that I missed. Does this point to anything in particular that I should be looking for? I appreciate any guidance.