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Refrigerator Replacement or Service
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Author:  txvista [ Tue Nov 29, 2016 11:38 am ]
Post subject:  Refrigerator Replacement or Service
This past year I have been having issues with my cabin refrigerator. Some weekends it was on, and other is was off. Now it is not cool at all either DC or AC. I do not have any experience trouble shooting refrigerators, but it doesn't seem like getting any power at the moment. Has anyone taken theirs out to have serviced? I'm not sure if it has to do with the inverter or not. The outlet has power. Am I missing something simple?

Also, has anyone just replaced their unit. I have a Nova Kool R3800 PS110. It looks like i can buy the same unit for about $900.
Author:  TheDanceII [ Tue Nov 29, 2016 2:55 pm ]
Post subject:  Re: Refrigerator Replacement or Service
Does the light come on in the fridge?
If yes, you have power.
Can you hear the compressor try to engage?
If yes but it cuts right back off or runs for a few seconds and then cuts off, you have an inverter or wiring or low voltage issue.
Author:  txvista [ Tue Nov 29, 2016 4:26 pm ]
Post subject:  Re: Refrigerator Replacement or Service
If I remember correctly, I don't think I have a light in that model. I don't hear the compressor kick on either. But I plug my phone into the outlet, it charges. I'll probably pull it out again in a couple of weeks to verify.
Author:  Thalasso [ Tue Nov 29, 2016 8:50 pm ]
Post subject:  Re: Refrigerator Replacement or Service
txvista wrote:
This past year I have been having issues with my cabin refrigerator. Some weekends it was on, and other is was off. Now it is not cool at all either DC or AC. I do not have any experience trouble shooting refrigerators, but it doesn't seem like getting any power at the moment. Has anyone taken theirs out to have serviced? I'm not sure if it has to do with the inverter or not. The outlet has power. Am I missing something simple?

Also, has anyone just replaced their unit. I have a Nova Kool R3800 PS110. It looks like i can buy the same unit for about $900.


INSTALLATION AND TROUBLE SHOOTING MANUAL for ... - Nova Kool
www.novakool.com/support/documents/manu ... 007PDF.pdf
INSTALLATION AND TROUBLE SHOOTING. MANUAL for all Models of Nova Kool. AC/DC and DC
Author:  chris268 [ Wed Nov 30, 2016 6:42 am ]
Post subject:  Re: Refrigerator Replacement or Service
Thalasso wrote:
txvista wrote:
This past year I have been having issues with my cabin refrigerator. Some weekends it was on, and other is was off. Now it is not cool at all either DC or AC. I do not have any experience trouble shooting refrigerators, but it doesn't seem like getting any power at the moment. Has anyone taken theirs out to have serviced? I'm not sure if it has to do with the inverter or not. The outlet has power. Am I missing something simple?

Also, has anyone just replaced their unit. I have a Nova Kool R3800 PS110. It looks like i can buy the same unit for about $900.


INSTALLATION AND TROUBLE SHOOTING MANUAL for ... - Nova Kool
http://www.novakool.com/support/documen ... 007PDF.pdf
INSTALLATION AND TROUBLE SHOOTING. MANUAL for all Models of Nova Kool. AC/DC and DC


Great info if you need to troubleshoot the refrigerator, thanks for sharing. I do find it interesting that they list #12 as good for either a max of 8' or 13' ( not sure why there is 2 different sizes), so for four Winns to run 16 is a crock IMO
Author:  298VISTA2000 [ Sat Dec 03, 2016 6:01 pm ]
Post subject:  Re: Refrigerator Replacement or Service
txvista wrote:
This past year I have been having issues with my cabin refrigerator. Some weekends it was on, and other is was off. Now it is not cool at all either DC or AC. I do not have any experience trouble shooting refrigerators, but it doesn't seem like getting any power at the moment. Has anyone taken theirs out to have serviced? I'm not sure if it has to do with the inverter or not. The outlet has power. Am I missing something simple?

Also, has anyone just replaced their unit. I have a Nova Kool R3800 PS110. It looks like i can buy the same unit for about $900.

Mine died and I now use it as a pantry. I have a big cooler on the back of my swim platform and a fridge at our slip to keep things cool and a cockpit freezer so not going to replace it. However, it might be that your cooling plate has a leak (which was part of my problem).
Author:  rweeb [ Sun Mar 05, 2017 5:49 pm ]
Post subject:  Re: Refrigerator Replacement or Service
FWIW,
Had a problem with my Waeco last year on a 2007 278 Vista. Fridge would not get very get cold but compressor appeared to be running on AC or DC only. (in reality compressor would toggle off but fan was still running). The hotter it was outside the worse the refrigerator performed.

The refrigerator uses a 12 volt compressor. There is a power supply or "brick" with both 120vac and ship 12vdc input and 12-24v output. This output goes to a control box on the back of the fridge that supplies power to the compressor. The supply or "brick" will switch to ship DC in order to power the compressor in the absence of 120VAC into the supply. It turned out that the "brick" 120 volt power supply was faulty.

In my case the power supply was toggling back and forth from ship AC to ship DC as the source power. Its output DC voltage would slowly drop under load below a threshold, probably a faulty voltage regulator. When this occurred the compressor would shut down. The supply would switch over to ship DC as the input source of power. Under no load the DC provided by the power supply would go back up and the supply would toggle off of ship DC as the source back to the supply DC and the cycle would repeat. It appeared the higher the air temperature the more consistent the toggling became and the lesser the refrigerator cooled. The control unit prevents the compressor from immediately restarting for a set amount of time 1-2 min everytime voltage was interrupted. The compressor would not run very long.

Can be hard to troubleshoot as the protection timing involved in the control unit wasn't obvious at first. I read somewhere else that the original MP-35 supply was borderline as far as being strong enough for that compressor, which probably led to it's early death. I went to a larger capacity power supply, MPS-50, $75 fix. Had to mount the brick in a different location as it was slightly larger than the original MPS-35. A lot cheaper than a new Fridge that might not of been an exact replacement fit. The fridge worked great rest of the year, think this cycling issue had been going on for a while appearing as poor performance in higher temps and just kept getting worse until it would no longer keep the compressor running long enough to cool.
https://www.google.com/search?q=MPS-50&ie=utf-8&oe=utf-8

(Update - lasted two years, seems I sprung a leak between compressor and cooling plate as there is a some oil residue in the freezer. Trying to find someone to repair, otherwise $800? Closest replacement I can find but seems discontinued is Dometic CRX-1065 or Norcold NRB 751BB)
Author:  Decision [ Thu Mar 09, 2017 11:18 am ]
Post subject:  Re: Refrigerator Replacement or Service
My cockpit fridge/freezer unit stopped working on AC. I pulled the fridge out enough to determine the invertor unit on the back of the fridge was not working. This fridge will work if I just leave it on DC, it just won't work on AC.

For the time being I just turn the fridge on when we are at the boat, then turn the fridge off when we leave. Normally just use cockpit fridge for drinks and galley fridge for everything else. At the age of the cockpit fridge I don't feel like investing the money for a new inverter for a fridge this age.
Author:  deafwish [ Thu Mar 09, 2017 3:01 pm ]
Post subject:  Re: Refrigerator Replacement or Service
Have you bridged out the thermostat to confirm it hasn't failed?
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