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Old 05-07-2021, 09:11 PM   #1
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2021 22' Caravel
Bozeman , Montana
Join Date: Sep 2020
Posts: 15
2-way refrigerator/microwave not working on battery

Hi,


Just picked up a '21 Caravel a couple weeks ago and heading out for a trip tomorrow. I've just discovered that the 2-way refrigerator and microwave are not working on battery power. They both work fine when plugged into shore power. I've flipped all the breakers to no avail.



Does anybody have any ideas what might be wrong?


Thanks for any help.


Brian.
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Old 05-07-2021, 09:54 PM   #2
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The microwave will only work while plugged in; battery is not an option.

Did you "turn on" the battery with the Use/Store switch while attempting to run the fridge?
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Old 05-07-2021, 09:57 PM   #3
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2006 28' Safari SE
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Are you new to RV type systems? I don't know everything about new models but is your 2 way fridge 110v and propane? If so its not going to run on battery power, needs propane when not plugged in. Also, my '06 microwave didn't come wired to run off the inverter/converter. (open to suggestions for a work around, PM me if someone has done this)
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Old 05-07-2021, 10:40 PM   #4
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Is your microwave and fridge connected to your inverter? That would not be common.
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Old 05-08-2021, 08:37 AM   #5
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it's a 2-way fridge

I understand that the microwave will only work on AC. But the fridge is 2-way and should work both on AC and DC. I assume that when I disconnect shore power that it should automatically switch to battery.
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Old 05-08-2021, 08:41 AM   #6
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Do your overhead lights work, if so that tells you you have 12 volt power and the battery disconnect switch is on. Your fridge may or may not automatically switch to 12 volt, find the manufacturers instructions in your owners packet of information. --Frank
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Old 05-08-2021, 09:13 AM   #7
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Like mentioned. A 2 way fridge is propane and AC only. There are some 3 way fridge's but one has to be very careful not to kill their batteries. Yours is propane and AC only
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Old 05-08-2021, 09:13 AM   #8
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2021 33FB Classic
Green Valley , Arizona
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So I have a new 33 classic. I had all the same questions while it was being built. What is going on is your refrigerator is a 2 way which means 110 or propane. I was very confused at first but in the end you, I and many others were mixed up on what that means. What in the end I was thinking was a three way refrigerator. This is 12 volt, 110 and propane. In the end I put in a large dolor bank of batteries 4 and they required the convection oven and refrigerator so they will work off the inverter. But as I found the refrigerator is a power hog and with 4 lithium batteries I can only run the refrigerator for about 4 hours. We did this so we can keep the refrigerator on going down the road. I hope this helps
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Old 05-08-2021, 09:20 AM   #9
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2017 30' Classic
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Hi

No stock AS (motor home or trailer) will run the microwave off the battery. The inverter simply will not put out that much power. If you *had* a bigger inverter, then the stock batteries in most (but not all) AS RV's would not do a good job.

"Two way" on a fridge can mean multiple things:

1) It will run on propane and 120V

2) It will run on 12V and 120V

Yes, this is confusing. The terms "absorption" and "compressor" are a whole lot better for working out what you have. If you have an absorption fridge, you will need to have propane hooked up and the lines purged for it to fire up. If you have a compressor fridge and it does not run on 12V, then there is a fuse or wire issue somewhere.

Bob
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Old 05-08-2021, 09:49 AM   #10
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Usually 2way means shore power or Propane.
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Old 05-08-2021, 10:34 AM   #11
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From the 2021 Caravel owners manual online:

"Your Caravel is equipped with Nova Kool 2-Way (12V,
120V) refrigerator. Review all refrigerator literature
supplied in your owner’s packet or stored in the
refrigerator prior to operating

Operation
The refrigerator operates on 12-volt current from the
battery or on 120V shore power"

Any other DC circuits not operating?

And from the fridge mfgr, https://www.novakool.com/guides-and-manuals lots of online docs and troubleshooting.

Gary
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Old 05-08-2021, 06:50 PM   #12
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To follow up. With my major solar upgrade I added a 3000 watt inverter with four Lithium batteries. Your fridge does need 12v to operate the propane system. But it will Not run on 12 v unless you do an upgrade and they wired the convection oven and the refrigerator to the inverter. So both items will work on the inverter. Without the inverter it is propane with the assistance of 12 volt or shore power. So again I just picked up my Airstream a month ago. You can call Tampa Airstream and they will confirm this.
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Old 05-08-2021, 06:59 PM   #13
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Exclamation

Amazing the diversity of opinions here, without really knowing the specifics of the OP’s trailer!

Good move Gary . . . thanks.


Quote:
Originally Posted by GCinSC2 View Post
From the 2021 Caravel owners manual online:

"Your Caravel is equipped with Nova Kool 2-Way (12V,
120V) refrigerator. Review all refrigerator literature
supplied in your owner’s packet or stored in the
refrigerator prior to operating

Operation
The refrigerator operates on 12-volt current from the
battery or on 120V shore power"

Any other DC circuits not operating?

And from the fridge mfgr, https://www.novakool.com/guides-and-manuals lots of online docs and troubleshooting.

Gary
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Old 05-10-2021, 06:16 AM   #14
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Long Island , New York
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Quote:
Originally Posted by Brian R. View Post
I understand that the microwave will only work on AC. But the fridge is 2-way and should work both on AC and DC. I assume that when I disconnect shore power that it should automatically switch to battery.
Wondering if you [OP] have had any luck getting the fridge going, and whether your batteries were well-charged?

What is your monitor reporting for battery voltage? [after waiting an hour since disconnecting shore/generator/solar power]

FYI the Batteries etc. sub-forum might have some helpful threads IMO:

https://www.airforums.com/forums/f449/

Thanks,
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Old 05-10-2021, 06:55 AM   #15
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Rogers , Arkansas
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2-Way Here Does Not Mean Propane

Quote:
Originally Posted by GCinSC2 View Post
From the 2021 Caravel owners manual online:

"Your Caravel is equipped with Nova Kool 2-Way (12V,
120V) refrigerator. Review all refrigerator literature
supplied in your owner’s packet or stored in the
refrigerator prior to operating

Operation
The refrigerator operates on 12-volt current from the
battery or on 120V shore power"

Any other DC circuits not operating?

And from the fridge mfgr, https://www.novakool.com/guides-and-manuals lots of online docs and troubleshooting.

Gary
Brian R
I am hoping you have this figured out by now.

Most AS are AC/Propane. The newer AS do not have the propane option for the refrigerators. I'm not sure I would want this but I'm sure there arepeople that do like it this way.
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Old 05-12-2021, 10:10 AM   #16
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1968 26' Overlander
Miami , Florida
Join Date: Oct 2014
Posts: 25
Novacool 2 way

Quote:
Originally Posted by GCinSC2 View Post
From the 2021 Caravel owners manual online:

"Your Caravel is equipped with Nova Kool 2-Way (12V,
120V) refrigerator. Review all refrigerator literature
supplied in your owner’s packet or stored in the
refrigerator prior to operating

Operation
The refrigerator operates on 12-volt current from the
battery or on 120V shore power"

Any other DC circuits not operating?

And from the fridge mfgr, https://www.novakool.com/guides-and-manuals lots of online docs and troubleshooting.

Gary
I am not trying to hijack the OP thread, but I also have a nova cool two way fridge that I installed in a 68 overlander. The other day my wife told me that I did not need to defrost the fridge because it had taken care of itself. Turns out the 12 V breaker got bumped and tripped. But the trailer was still plugged in to shore power. What I'm wondering is if the in Nova Cool needs at least some 12 V power to run its circuitry and decide to switch back-and-forth between 12 V and 120 when available. A
Does anybody have a thought on that?
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Old 05-12-2021, 10:26 AM   #17
JEB
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2021 23' Globetrotter
Northern , Illinois
Join Date: Nov 2020
Posts: 86
Quote:
Originally Posted by Kawboy01 View Post
Usually 2way means shore power or Propane.
Why would you say that? If you have a ‘21 Globetrotter, then your refrigerator is a Nova Kool compressor-driven refrigerator, same as mine. It operates on 110v and 12v only. It does not operate on propane.
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Old 05-12-2021, 11:26 AM   #18
JEB
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2021 23' Globetrotter
Northern , Illinois
Join Date: Nov 2020
Posts: 86
Quote:
Originally Posted by Brian R. View Post
I understand that the microwave will only work on AC. But the fridge is 2-way and should work both on AC and DC. I assume that when I disconnect shore power that it should automatically switch to battery.
If you have a Nova Kool—and it sounds like you do—the switchover should be automatic. Have you checked the 12v fuses to make sure none is blown? Have you made sure the battery disconnect is in the on position?
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Old 05-12-2021, 03:32 PM   #19
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2018 30' Classic
Jacksonville , Florida
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Posts: 639
Two way refrigeration.

Refrigerator on propane uses 12v controls. That means you have to have both the propane and the battery on.

Think about it. It maintains a temperature. To do that the controls monitor temp and turn on the burner when it needs to cool down the unit. The 12v lights the burnet. It also gives you that temp reading indicator. When cold enough it turns off the burner.

On 110vac the 110 vac gives 12v power to run the controls. The "burner" is a 110vac resistance element.
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Old 05-12-2021, 05:18 PM   #20
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2014 20' Flying Cloud
Long Island , New York
Join Date: Jun 2015
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Exclamation

Quote:
Originally Posted by Overstreet View Post
Refrigerator on propane uses 12v controls. That means you have to have both the propane and the battery on.
. . .
Unless the OP's 2021 Caravel fridge does not use propane at all?

See Post #11:
Quote:
Originally Posted by GCinSC2 View Post
From the 2021 Caravel owners manual online:

"Your Caravel is equipped with Nova Kool 2-Way (12V,
120V) refrigerator. Review all refrigerator literature
supplied in your owner’s packet or stored in the
refrigerator prior to operating

Operation
The refrigerator operates on 12-volt current from the
battery or on 120V shore power"

Any other DC circuits not operating?

And from the fridge mfgr, https://www.novakool.com/guides-and-manuals lots of online docs and troubleshooting.

Gary
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