Hayward Omnilogic Errors

[fnelsen]

I have a Hayward Omni logic system. It has been working great with some adjustments/repairs along the way for the last2 years (when we bought the home, Ibelieve it was new in 2015). I am getting errors
1. Chlorinator 1, T-cell sensor short
2. Chlorinator1 CHLOR Relay K1 Stuck Open
3. Chlorinator1 CHLOR Relay K2 Stuck Open

Chlorinator diagnostics says the following
cell temp 89.7
average salt 2900 ppm
cell current 0.00 A
Cell Type T-Cell-9
Relay polarity OFF
Cell voltage 29.88

there are no visable connection issues.
I have replaced all 4 of the fuses on the board, the salt level is 3200 (tested using Taylor K1766 salt test kit). The filter is new. I cleaned the cell. I had the salt cell tested locally and it is good (only a year old Hayward).

Any help would be greatly appreciated

 

[ajw22]

I know you said you replaced the fuses but that is usually the cause of the errors.

Do you have a multimeter?

Have you checked the new fuses are still good using the multiumeter?

 

[fnelsen]

thanks for your reply. I found the issue. the part that contains the femail plug for the salt cell is burnt at the motheboard. I never thought to look but on much closer inspection I found the issue. Part number G1-015155-1T is the part I need to replace. I will have to solder in a new piece for sure

 

[ajw22]

We have seen that part burn.

I think the connector header on the pcb is Molex 00015246101, Digi-Key Part# WM7188-ND. EBay "15-24-6106 MOLEX CONN HEADER 10 POSITION 4.2mm VERT TIN" has been a source for it. It's an exact fitment except it's off white. It is also reported to be Mini-Fit BMI 42385

 

[fnelsen]

thank you very much for this info

 

[fnelsen]

the part on the motherboard is male do you happen to know the part number?

 

[ajw22]

Browsing Digikey it looks like this is what you need...

https://www.digikey.com/en/products/detail/molex/0444721054/300086

or

https://www.digikey.com/en/products/detail/molex/0444721053/2405211

Difference seems to just be the materials...

 

[fnelsen]

Thank you

 

[fnelsen]

Any thoughts on why this happened? Any way to prevent it in the future? Florida is the lightning state and I wonder if lightning could have been the cause

 

[ajw22]

Any thoughts on why this happened?

Hayward boards seem to burn up components.

Poor high resistance connections combined with high salt levels which cause high amps which cause heat which overheat and burn components.

Any way to prevent it in the future? Florida is the lightning state and I wonder if lightning could have been the cause

Run your salt level at the low end of the range for Hayward SWGs to keep amps low and component heat low.

Lightning has nothing to do with the failure.

Hayward Aquarite SWG - Further Reading

www.troublefreepool.com

 

[fnelsen]

You have been more than helpful and I cannot express how grateful I am for your knowledge and your help. Unfortunately where I live near Orlando Fl. there are Hayward recommended tech that are not very competent. Thank you very much

 

[ajw22]

Unfortunately where I live near Orlando Fl. there are Hayward recommended tech that are not very competent.

That is not unique to the Orlando area.

 

[frazzzled]

Will you please let us know if replacing the plug on the motherboard fixes the issue? We are having the same issue and our Hayward service people just want to start replacing things at a very expensive cost and I want to know that the problem will be fixed if I am spending that much money.

 

[fnelsen]

I will post my results after installing the new part. I do not trust my local "Recommended Techs" because each of the 3 that I had come to look at the system when I bought the house 2 years ago either told me some really stupid advice or just said don't worry about it.

 

[fnelsen]

I received the new circuit board ($125) and the install was a bit of a challenge because the short from the old one had welded contacts to the motherboard. I used a self contained desolder sucker/iron and that was the best tool for me. I did however have to address two holes that were just burnt to both side of the board. If you are not proficient at soldering I suggest you watch some of the many videos on youtube.

After getting the old board plug out, the install of the new connector was easy enough. Make certain you have some good flux. After this I plugged in the new circuit board and put the system back together. I had my fingers crossed and it all is working fine now. Actually it is working much better than before and my readings are excellent. My system is an older model that came with the house I bought 2 years ago.

FYI I did not remove the motherboard before working on the removal and replacement of the new connector. There were just too many wires to disconnect and reconnect. Instead I opted to work on the board while still connected (system off and breakers off as well). I did place a towel beneath the board for some support and I used some blue painters tape for additional support.

 

[PoolDirector]

Always trust your gut. Same experience w Orlando and Hayward ‘support’. The kid on phone did not inspire confidence, and they said it was going to be $139 just to come out. lol. Got a small fuse and fixed it myself.

 

[SoDel]

Any thoughts on why this happened? Any way to prevent it in the future? Florida is the lightning state and I wonder if lightning could have been the cause

As another preventative measure, slather some anti-corrosion gel in the connector every year or two. I also use the stuff for buried landscape lighting connectors, connectors on the boat, etc. It does what it says — no corrosion so less chance of resistance building up in the contact which will overheat it. I bought a tub of this stuff about 20 years ago and still have it. Doesn’t take much but makes a world of difference for contacts.

Super Lube 14.1 oz. (400 g) Anti-Corrosion Canister Gel 82016 - The Home Depot

Super Lube Anti-Corrosion and Connector Gel is a specially formulated high molecular weight connector gel used as a dielectric compound and as a corrosion inhibitor. It will provide much better protection

www.homedepot.com

 

[suzook]

Seems like a common issue on these units? Caused by a short in the cell? You would think there would be a fast blow fuse for it.