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21-05-2018, 13:46
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#1
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Registered User
Join Date: Dec 2010
Location: W Carib
Boat: Wildcat 35, Hobie 33
Posts: 13,480
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AC Issue
Despite years of little to no use, my good old 16K BTU Marine Air system started up and ran fine recently, but on a more recent start up it took an HPF error soon after start up. No problem, likely a water flow issue, so I cleaned out the water lines (not very dirty) and fired it up. Started fine, but I noticed this time that after a few minutes of operation the sea water pump stopped. Then of course predictably it HPF'ed again soon thereafter.
If I power down the unit and restart the same thing happens again (pump runs at start up and then stops), so the pump isnt dead, its just stopping for some reason, but runs again on reset.
Troubleshooting suggestions?
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21-05-2018, 13:57
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#2
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Registered User
Join Date: Jul 2005
Location: Bellingham
Boat: Outbound 44
Posts: 9,319
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Re: AC Issue
Have you tried bleeding air in the intake just post the pump?
__________________
Paul
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21-05-2018, 14:03
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#3
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Registered User
Join Date: Sep 2009
Location: Houston
Boat: ‘01 Catana 401
Posts: 9,626
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Re: AC Issue
What flavor of controls do you have?
Old rotary knobs?
Digital?
Have you measured the voltage at the pump to see if the pump is stopping or is being turned off?
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21-05-2018, 17:59
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#4
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Registered User
Join Date: Dec 2010
Location: W Carib
Boat: Wildcat 35, Hobie 33
Posts: 13,480
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Re: AC Issue
Quote:
Originally Posted by Sailmonkey
What flavor of controls do you have?
Old rotary knobs?
Digital?
Have you measured the voltage at the pump to see if the pump is stopping or is being turned off?
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Digital, Passport model. Like this: https://goo.gl/images/QHTHtv
Will check voltage.
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21-05-2018, 18:00
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#5
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Registered User
Join Date: Dec 2010
Location: W Carib
Boat: Wildcat 35, Hobie 33
Posts: 13,480
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Re: AC Issue
Quote:
Originally Posted by Paul L
Have you tried bleeding air in the intake just post the pump?
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Disconnected cooling water hose at pump discharge today and ran a snake up it. I could blow air all the way thru hose and water is flowing.
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22-05-2018, 02:58
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#6
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Senior Cruiser
Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 49,138
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Re: AC Issue
"The HPF is a High Freon Pressure error. It indicates that airflow around the condenser isn't happening like it should. This is sometimes caused by a dirty filter, an obstruction in front of the intake, a broken fan, or even just a blown fuse that prevents the fan from running."
Per ➥ http://www.cruisersforum.com/forums/...age-99091.html
__________________
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?"
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22-05-2018, 03:47
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#7
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Registered User
Join Date: Apr 2014
Location: Puerto Rico
Boat: Cape Dory 28
Posts: 144
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Re: AC Issue
Get yourself a cheap extension cord, cut the female end off and wire it directly to the water pump, bypassing the A/C control board. The pump should obviously run without stopping. If it stops, you have a pump problem. If not, you fire up the A/C and run it while the pump is receiving bypass power. If it runs fine, you have a control board problem. BTW, keep the cut extension cord – you will be surprised what else you may need it for!
Ed
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22-05-2018, 04:12
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#8
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Marine Service Provider
Join Date: Jun 2010
Location: Northern Caribbean
Boat: Cheoy Lee, 44 Cutter. Dolce Far Niente
Posts: 564
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Re: AC Issue
If you have a March pump they are water cooled and can overheat and shut down. There are two metal cooling tubes which the sea water passes through to cool the pump, take it apart and run some muriatic acid through, and clean any obstructions in the tubes with a small piece of wire. If you leave the system shut down for a long time with sea water in the lines it can clog with growth..
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22-05-2018, 04:45
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#9
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Registered User
Join Date: Dec 2010
Location: W Carib
Boat: Wildcat 35, Hobie 33
Posts: 13,480
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Re: AC Issue
Quote:
Originally Posted by GordMay
"The HPF is a High Freon Pressure error. It indicates that airflow around the condenser isn't happening like it should. This is sometimes caused by a dirty filter, an obstruction in front of the intake, a broken fan, or even just a blown fuse that prevents the fan from running."
Per ➥ http://www.cruisersforum.com/forums/...age-99091.html
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Fan is running fine, air flow around unit is good. HPF also happens, and most commonly in my experience, when cooling water gets compromised.
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22-05-2018, 04:47
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#10
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Registered User
Join Date: Dec 2010
Location: W Carib
Boat: Wildcat 35, Hobie 33
Posts: 13,480
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Re: AC Issue
Quote:
Originally Posted by rourkeh
If you have a March pump they are water cooled and can overheat and shut down. There are two metal cooling tubes which the sea water passes through to cool the pump, take it apart and run some muriatic acid through, and clean any obstructions in the tubes with a small piece of wire. If you leave the system shut down for a long time with sea water in the lines it can clog with growth..
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I was just thinking that, pump has neen unused for a long time so those little tubes could be clogged. Another option to try.
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22-05-2018, 04:48
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#11
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Registered User
Join Date: Dec 2010
Location: W Carib
Boat: Wildcat 35, Hobie 33
Posts: 13,480
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Re: AC Issue
Quote:
Originally Posted by edmundsteele
Get yourself a cheap extension cord, cut the female end off and wire it directly to the water pump, bypassing the A/C control board. The pump should obviously run without stopping. If it stops, you have a pump problem. If not, you fire up the A/C and run it while the pump is receiving bypass power. If it runs fine, you have a control board problem. BTW, keep the cut extension cord – you will be surprised what else you may need it for!
Ed
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Yes, a good diagnostic I think, will isolate which component has the problem.
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