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11-03-2013, 09:04 PM
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#1
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Guru
City: Solomons Island Md
Vessel Name: Fryedaze
Vessel Model: MC 42 (Overseas Co) Monk 42
Join Date: Sep 2011
Posts: 1,720
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AC Compressor reversing valve stuck
We have a 16000 BTU Marine Air Sytem Model C16H that will not blow much heat. It works great in the AC mode but not in heat. In heat the compressor gets hot and the suction side doesnt get hot like it should. I believe the reversing valve isnt shifting. I can here the pilot solinoid engaging but I dont thing the reversing valve spool is shifting.
My question is ... Has anyone fixed this problem and is it possible to cycle the reversing valve and agitate it to clear up the issue?
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11-04-2013, 03:24 PM
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#2
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Guru
City: Solomons Island Md
Vessel Name: Fryedaze
Vessel Model: MC 42 (Overseas Co) Monk 42
Join Date: Sep 2011
Posts: 1,720
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Follow up information:
My Marine Air System 16000 BTU unit, Serial#87K11967-11D is not producing full heat in the heat mode. It appears to be working in AC mode. The suction line temp is hot at 204F and the discharge is 60F. The seawater temp is 55F. The compressor is hot at 125F. I cycled the reversing valve many time thinking it may be hung up. I can hear the solenoid clicking and the sound of the reversing valve shifting.
When the unit runs in cooling mode the suction is 22.7F and the disch is 76.5F with the compressor at 110F.
I have another C16H on the boat and in heat it runs 145F suction, 60F disch and 47F compressor temps.
Any help would be appreciated.
Dave
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11-04-2013, 05:57 PM
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#3
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Valued Technical Contributor
City: Litchfield, Ct
Join Date: Aug 2012
Posts: 6,775
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Tap on the reversing valve with a hammer?
David
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11-05-2013, 05:36 AM
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#4
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Guru
Join Date: Oct 2007
Posts: 22,553
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Look first at the voltage supplied to the terminals IF its Ok , tap away.
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11-05-2013, 07:51 AM
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#5
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TF Site Team/Forum Founder
City: League City, Tx
Vessel Name: Floatsome & Jetsome
Vessel Model: Meridian 411
Join Date: Oct 2007
Posts: 7,332
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Replace reversing valve....
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11-05-2013, 01:05 PM
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#6
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Guru
Join Date: Oct 2007
Posts: 22,553
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Tap on the reversing valve with a hammer?
Lightly with the handle , you are just hoping its stuck a bit not crapped out.
Replacement is not DIY , unless you have gauges and a suction pump.
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11-05-2013, 01:15 PM
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#7
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Guru
City: Seabrook Texas
Vessel Name: TheVenture
Vessel Model: 1985 Bestway Labelle Sundeck 40ft
Join Date: May 2013
Posts: 560
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and can silver solder
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11-05-2013, 02:53 PM
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#8
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Senior Member
City: Foley, Alabama
Vessel Name: GITANA
Vessel Model: Sea Ranger 47 Pilothouse
Join Date: Mar 2012
Posts: 315
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Ditto on the tapping suggestion. I had the same problem last fall with a similar system. The technician I called tapped on the valve and voila! It worked, and has worked fine ever since. Good luck.
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11-06-2013, 09:41 AM
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#9
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TF Site Team/Forum Founder
City: League City, Tx
Vessel Name: Floatsome & Jetsome
Vessel Model: Meridian 411
Join Date: Oct 2007
Posts: 7,332
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I am dealing with this on one of my units. It did this in the Spring going from heat back to AC...and now it is doing it again going in the other direction. It may be a good idea to exercise these things mid season in the other direction.
__________________
Prairie 29...Perkins 4236...Sold
Mainship Pilot 30...Yanmar 4LHA-STP...Sold
Carver 356...T-Cummins 330B...Sold
Meridian 411...T-Cummins 450C
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