Having some issues with a Jandy AE-Ti inground pool heat pump.  Jandy (now Zodiac) helpfully identified the service network in this area, which as I found is not legally licensed to work on Jandy heat pumps.

 

So got hold of a good guy in town who is a true HVAC repairman (but not so much on pool equipment).  We identified that power was failing to several of the circuit board components, so I found them online and replaced them.

Everything works at startup now, but the compressor shuts itself down after about 5-10 seconds.  No error codes come up.  Best advice I can find on the interweb is 4 years old and suggests perhaps a blockage in the coil so the Freon won't flow, or perhaps a simple recharge is due (R22), although there is an error code for low refrigerant in the manual.

 

Before I call the guy to come back out, was wondering if anyone had experience in this area (he's $100 just to show up).

 

 

I don't have your brand but have had issues similar to your's which indicated low refrigerant, but that was a false flag.  What it turned out to be was the flow monitor sensor (actually a pressure switch) that is designed to insure that a some amount of pool water is actually flowing through the unit.  That switch seems to stick from time to time which lets the unit run for about 10 seconds and then it trips out.  You might try jumping out that switch and see if it fixes the problem to test if your switch might be bad.

I don't have your brand but have had issues similar to your's which indicated low refrigerant, but that was a false flag.  What it turned out to be was the flow monitor sensor (actually a pressure switch) that is designed to insure that a some amount of pool water is actually flowing through the unit.  That switch seems to stick from time to time which lets the unit run for about 10 seconds and then it trips out.  You might try jumping out that switch and see if it fixes the problem to test if your switch might be bad.

I'll try that.  What is involved in jumping out?  Just cross-connect the in and out wire?

Well on mine it was just a switch that closed a circuit, so a jumper wire across the terminals was good enough to prove that to be the problem.

Thermal expansion valve? If it has one. That will stop refrigerant flow if it malfunctions. That valve is a mechanical part, not electronic.