Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 18-11-2019, 07:45   #1
Registered User

Join Date: Nov 2019
Posts: 2
Marine AC Issue

Hi, I have a recently acquired 84 Trojan F-36 with factory Cruisair in Cortez, FL. One of the units unexpectedly stuck in reverse cycle and is producing heat but I have not been able to locate a reverse cycle switch. Any ideas? Thanks.
__________________

TClark-FL is offline   Reply With Quote
Old 18-11-2019, 08:17   #2
Registered User

Join Date: Jun 2019
Posts: 115
Re: Marine AC Issue

Will it go into cool, but not cool?
What type of display/tstat do you have?
Have you set it to heat only in the programming?
Have you lowered the setpoint below ambient?
The reversing valve is on the condensing unit itself, it is a solenoid style, it has a coil with 2 wires which slides over the valve plunger, when it is energized it actuates the plunger which in turn switched the flow of refrigerant, effectively turning the seawater condenser into an evaporator.
Look for the coil and a big tube with 3 other tubes coming out.

It may be stuck, you can tap it (the big part) lightly to try and free it up, but be careful.
There many other things that cause this, but try and get us answers to the questions above and we can figure it out.
__________________

Coolerking is offline   Reply With Quote
Old 18-11-2019, 09:27   #3
Sponsoring Vendor

Community Sponsor
Cruisers Forum Supporter

Join Date: Apr 2006
Location: Vancouver Island, BC Canada
Boat: Uniflite 31, 1973
Posts: 210
Images: 1
Re: Marine AC Issue

The rev cycle is switch is part of the thermostat and is controlled by the temperature dial. It is fairly common for the reversing valve to stick from disuse. It usually can be freed by cycling the temp dial from lowest to highest setting several times with the unit running. Note, the room temp must be within range for both heat and cool settings for this to work. Also check the connections at the reversing valve. This is a piece in the refrigerant plumbing that looks like a tree with 4 copper tubes coming into it and an electric coil on the end.
__________________
Experience develops good judgment; bad judgement develops experience.
EngNate is offline   Reply With Quote
Old 18-11-2019, 09:54   #4
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 30,033
Marine AC Issue

You can actually wack one pretty good with the handle of a plastic screwdriver, just donít use a sharp edged metal tool.
If it operates, youíll hear an unmistakable Whoosh as the gas changes paths.
Before you do anything though, find it and have someone actuate the thermostat full range and wait for say 1 min at each full range, at one of those you should hear a click, thatís telling you the solenoid is getting power and the solenoid is stuck if you donít hear that Whoosh.
If it doesnít click at all, then you may have an electrical problem, if it clicks but no whoosh, the reversing valve may be stuck.
I believe itís usual for the no power condition to be cooling and it takes power to cause one to go to heat.
Stuck reversing valves are pretty common as they can sit for long periods and eventually get stuck, very often a percussion adjustment gets them working again.

Personally for some reason, Iíve not heard of one getting stuck in the heat mode, not sure why though, but they always seem to stick in the cooling mode. Maybe thatís because when not operating they return to the cooling position as thatís where the solenoid goes when power is off, at least for the ones Iíve had.
a64pilot is online now   Reply With Quote
Old 18-11-2019, 12:44   #5
Senior Cruiser
 
GordMay's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 38,198
Images: 241
Re: Marine AC Issue

Greetings and welcome aboard the CF, TClark.
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 20-11-2019, 12:21   #6
Registered User

Join Date: Nov 2019
Posts: 2
Re: Marine AC Issue

I located the reversing valve and tried tapping but it does not change the behavior. I tried cycling the temp control also with no luck. Also, I noticed cycling the temp control causes a whooshing noise from pump/condenser unit. I did notice one very strange behavior when cycling the temp control - when set to coldest, it is hot and when set to warmest it is room temp. I have attached an image of control panel. Thanks for all the info.
Attached Thumbnails
Click image for larger version

Name:	ac2.jpg
Views:	18
Size:	407.7 KB
ID:	203473  
TClark-FL is offline   Reply With Quote
Old 20-11-2019, 12:47   #7
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 30,033
Marine AC Issue

That whoosh noise is the reversing valve doing its thing.
That control panel looks very close to my old one, I replaced the thermostat for a stupid price once I found it once and eventually replaced the whole unit.

But if you heard the whoosh, Iím pretty sure the reversing valve works, and your problem is elsewhere.
__________________

a64pilot is online now   Reply With Quote
Reply

Tags
marine

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Ray marine a78 issue davefromoregon Marine Electronics 1 16-12-2017 19:13
Marine Radio Issue Beanctr Marine Electronics 12 13-09-2016 13:08
Data Marine Wind Instrument Issue? Richfef Marine Electronics 0 30-05-2016 18:04
Blackline Marine or West Bay Marine for spring haulout Jd1 Construction, Maintenance & Refit 0 08-03-2013 18:08

Advertise Here


All times are GMT -7. The time now is 18:01.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.