Dometic CF50 issue

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Dometic CF50 issue

Postby cutieXpanda [OP] » May 22nd 2020, 11:48pm

Hi AstroSafari :)

Recently I took the dive and purchased a Dometic CF50 Fridge/Freezer from Rei because it was on sale..

It arrived today and I tried setting it up but it keeps shutting down and restarting on me.

I'm running a 12V battery, two 100W solar panels, and using a 30A charge controller. My inverter is a 600W Pure Sine Wave inverter. After connecting the 24V/12V port into the fridge I used my USB-to-cigarette lighter adapter to plug the fridge into my inverter.

The unit starts up, the fan blows for a few seconds, it turns off then repeats.

My first guess is that the USB-to-cigarette lighter adapter isn't sufficient.. so I plugged it into my vehicles cigarette lighter and it turns on, the display turns off.. then the power light blinks without the fans blowing.

Where do I go from here?
Should I charge it in my house until it reaches the desired temperature then place it in my build?
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Re: Dometic CF50 issue

Postby Sailing_Faith » May 23rd 2020, 1:38am

USB to cigarette lighter plug is your problem. Install a proper 12v jack... I like Marinco .
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Re: Dometic CF50 issue

Postby cutieXpanda [OP] » May 23rd 2020, 1:46am

I'm unfamiliar with Marinco and have no experience wiring 12v jacks. Is the process simple enough for me to do it in my van with basic hand tools?
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Re: Dometic CF50 issue

Postby Birdshake » May 25th 2020, 3:30pm

Does the cooler work fine when it’s plugged in at home to standard wall socket?
The dometic is supposed to be powered from 12v when in the van. Going through the inverter is a waste and it’s unable to give it the power it needs. You’ll need to install the fridge directly to the battery using the appropriate gauged wire and a fuse.
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Re: Dometic CF50 issue

Postby dchan51360 » May 25th 2020, 8:37pm

Sailing faith got it..

USB only puts out max 2.1 amps at 5 V so about 10 W (give or take)
The Dometic requires 7A at 12v so it's looking to draw 84W (or there abouts)

I would suggest you don't try that again. You may seriously damage the USB/Cigarette lighter device or even start a fire if you don't blow fuses first.

Even some Cigarette lighters/accessory outlets don't put out enough current to drive some of these heavier powered devices. Some of the inline fuses I've gotten with some of the accessory outlets I've gotten are only 5A.

Getting an outlet/jack designed to put out 10A and wiring it directly to your battery fuse box would be your best bet. Don't forget to put in the fuses with it.

As far as ease, If you want to do it right, you should solder all connections for something like this but at the bare minimum you want high quality crimps with calibrated crimpers to install these. Other than that, it's pretty straight forward. Red or Positive goes to Red/positive and Black goes to ground.

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