RayPac 266 Heater Sensor Failure

[chuckles19]

Hi to all;

My RayPac 266 Pool Heater indicates Sensor Failure. I'll assume this not too difficult to fix.


Any help would be appreciated.


May thanks,

Gary R.

 

[ps0303]

Not at all difficult to replace. You'll remove the front door, the four screws holding the panel with the board, and the top side panel where the sensor is located. Unscrew the white nut holding sensor in and then go from there. Assuming it is the temp sensor.

 

[chuckles19]

OK, sounds easy but after backwashing the error went away. The pressure was at 25 rather than the usual 20. Not sure whether that is related or not.

We'll see if the issue comes back today.

Regards,

Gary R

 

[ps0303]

OK so it was the pressure sensor it was complaining about.

 

[skimmerswimmer]

There is a thumb wheel adjustment on the pressure/flow sensor that you can turn to make it more or less sensitive to system pressure changes.

 

[ps0303]

There is a thumb wheel adjustment on the pressure/flow sensor that you can turn to make it more or less sensitive to system pressure changes.

I have installed this brand heater for over 10 years and have never ever needed to mess with the pressure switch like this. I never recommend that this sensor be adjusted.

 

[skimmerswimmer]

I agree that it is probably not the issue in this case, but some systems don't have a bypass valve on their heater intake so if their systems flow and pressure is borderline, they may not have another easy option. I wouldn't recommend normal users make these adjustments without the advice of the manufacturer. Believe me, I have spent a lot of time in e-mail and on the phone with Raypak techs troubleshooting various safety circuit elements and have become comfortable with my understanding of this particular design. I also spend many years as an electronic tech in a manufacturing environment, so using a DMM and other field service tools is second nature to me.

 

[chuckles19]

OK, after backwashing and making sure the impeller is clear pressure is normal 20psi. I'm back to thinking it's the temperature sensor as the sensor failure message is back.


This is a RayPak 266a, I'm a little unclear what to do after I remove the four screws. Does the unit pull out to get to the sensor?


Thank you.


Gary R

 

[Pool Clown]

1. Check the wiring to the sensor(s). Rats/mice chew everything, causing what may look like a component failure, when actually it is the wiring to that particular component.
2. You should never need to adjust a pressure switch that has been previously operating "ok". If the system, has for some reason, reduced flow, tweaking the pressure switch is not the fix. Find the source of, or the reason for, the reduced flow, and correct it at that point.
3. An error of SNS will be the temp sensor, a PRS will be the pressure switch. There is some confusion as to what your true error is. If your error is SNS, the backwashing "fix" may just be a coincidence, and you might not be out of the woods yet.

After the four screws, the top of the bezel should rotate down toward you hinging at the bottom. You may have to give it a gentle tug. That is where the sensor plugs into the board. The sensor itself is located at the water connection side of the heater.

 

[chuckles19]

OK, got the sensor out, super simple. Wiring looked fine. It had a minor whitish build up on it, wiped it clean, reinstalled and so far no error message. If the error message returns I'll order the part and install.


Thanks to all for your assistance!!.


Best,


Gary R.