Thanks for all the input...
The system is analog so just a relay and two capacitors. I looked on the schematic and see only a high pressure switch, no low pressure cut off. wfah 5-16c condensor
Would compressor cut out by itself for low freon without switch?
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Thread: Cruisair mystery cut off
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06-27-2020 10:52 AM #11Registered Member
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- May 2019
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Re: Cruisair mystery cut off
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Re: Cruisair mystery cut off
There should be low pressure switch in the system. Compressors also have a temperature cut off but I doubt that would kick in so quickly. Was the compressor hot?
Pascal
Miami, FL
1970 53 MY #325 Cummins 6CTAs
2014 26' gaff rigged sloop
2007 Sandbarhopper 13
12' Westphal Cat boat
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Re: Cruisair mystery cut off
The temperature switch is also an over current device. Pops from heat or current that also heats it up. Resets in about a minute or less. You can hear it click. If that’s what it is just get a good AC guy to diagnose. I spent way too much time and effort. They know what to check and in what order.
1966 34c
1982 46 HP
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06-27-2020 02:01 PM #14Registered Member
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- May 2019
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Re: Cruisair mystery cut off
So I did find what looks like a low pressure switch on the cap tube behind the control box. It is not on the schematic.
The unit is cold since it will not run more than 1 second.
Pattern is it tries to run> compressor starts for 1 second and stops. About 1 minute later same exact thing. it is a perfect loop trying to start every 50 seconds then stops.
Cannot get pressure reading running since it will not stay on for more than 1 second. Shows about 100psi equal for high and low not running
edit... That must be the reversing valve not LP switchLast edited by boozubay; 06-27-2020 at 02:26 PM.
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06-27-2020 02:05 PM #15
Re: Cruisair mystery cut off
Clixon on the compressor?
Scott
41C117 "Hattatude"
Port Canaveral Florida.
Marine Electronics and Electrical Products Distributor.
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Re: Cruisair mystery cut off
Could you send a pic of the switch and where the tube connects to the compressor.
Small tube from the compressor is high pressure, larger tube to the compressor is the low pressure.
Yes, when the compressor starts, it draws down the low side lower. If it's a low pressure switch, it will behave exactly as you have noted.
A bad run cap, bad contactor or bad/burnt wire theoretically could do this also.
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Re: Cruisair mystery cut off
Where are you hiding your boat? I can help if your close.
I'm in Satsuma, 32189.
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06-27-2020 04:21 PM #18Registered Member
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Re: Cruisair mystery cut off
We are in Tampa Bay... Dunedin to be exact
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06-29-2020 09:24 AM #19Registered Member
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- May 2019
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Re: Cruisair mystery cut off
I figured I would come back and post the answer for those that me be having a similar issue....
After swapping capacitors, relay, bypassing HP switch I found there is a thermal overload switch under the cap where the wires run into the compressor.. That was the culprit!
Bypassed to test and OMG it stayed on.... There was a little problem with too much gas in the compressor and in 30 seconds it did a death wobble and done! Compressor is destroyed from over pressure.
Expensive lesson to learn.... So the little $30 part could have saved me a ton of time.
A professional may have gone right to this or maybe not. So a new compressor will be in route and now I get to learn compressor replacement and evac. Learning from mistakes is a way to learn even if it can be expensive lol.
3 weeks waiting for an AC guy to come out is just insane.
We live aboard so had to make a run to Home Depot for a portable ac for the master so we can sleep in comfort. Any advice about compressor replacement is welcome too!
On a positive spin, I now feel I know these systems pretty intimately. They are pretty simple since no control boards, just a relay and to capacitors...
If anyone knows the correct tecumseh compressor for a WFAH16c that woulld help a lot. Going to call Flagship marine near us next for parts...
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06-29-2020 09:49 AM #20
Re: Cruisair mystery cut off
That's the clixon. It's there for a reason. My previous post evidently never mad the site.
Scott
41C117 "Hattatude"
Port Canaveral Florida.
Marine Electronics and Electrical Products Distributor.