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Marine-AC Topics
Troubleshooting
Cruisair Split System (One fan not working)

Cruisair Split System (One fan not working)
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Member

CaptainYAH

Waretown, NJ Hot summers

posts 14

1:09 pm October 14, 2011
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Steve,

 

How do I place an order with you?

 

Bob
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Steve Pooler

posts 1127

12:24 pm October 17, 2011
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New motor shipped today  Cool

 

Let us know how it goes when you get back from Mexico Bob…Hope the fishin's Great !!!

 

Steve~
Member

CaptainYAH

Waretown, NJ Hot summers

posts 14

10:29 am November 3, 2011
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Hi Steve,

 

We installed the fan motor into the unit yesterday and will put the unit back in the boat today. The system is a Cruisair 24K BTU (split system) with 2 ESS12 cooling units with a SMX II control in a 46' 2007 Ocean. Do you have the charging chart for this unit or do you know where I can get it?

With your help, this has been a much easier project than expected. Thanks!

 

Regards,

 

Bob
Admin

Steve Pooler

posts 1127

11:02 am November 3, 2011
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Hi Bob~

Glad you got thru it…It's really is not that bad once you do the first one…  Cool

You can find the charging info in this PDF manual:  http://www.dometic.com/FileOrg…..ration.pdf

 

Charging info starts on page 14…Curve chart for R-22 on page 38…

Let me know if you have any questions or issues…

 

Steve~ 
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davidwigler

Knoxville, TN

posts 17

6:48 am November 11, 2011
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I'm really sorry I didn't see this post earlier.  I had the exact same problem.  One of the fans on a 24K split unit was intermittent. Once it starts it runs fine, and it's 34 years old!

I raised the HI fan speed to its maximum setting on the SMX-II and the problem is solved for now.  The fan wasn't getting enough voltage to start. 

1977 Hatteras 58' Motoryacht, galley up model with 4 staterooms

5 reverse cycle Cruisair compressors in the starboard engine room with SMXII controllers.  One self contained unit for the enclosed aft deck.  Total 87K btu
Admin

Steve Pooler

posts 1127

6:57 am November 11, 2011
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Hi David~

Your issue is likely the LOW fan setting in the SMX II programming is set too low…

 

The High fan setting should be calibrated to where the motor Just Starts to slow (or hum a bit) then raise it up 3 reference numbers above that point….This will assure you are getting max voltage on high….Yet also insure that when you drop speeds that you get a 20% drop with each light…If you set to maximum you may drop 2 or 3 lights before you notice a speed change…

 

Steve~
Member

davidwigler

Knoxville, TN

posts 17

8:25 pm November 17, 2011
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Steve, thanks so much for your help.  You were correct as usual.  Raising the slow fan speed stopped the problem.

1977 Hatteras 58' Motoryacht, galley up model with 4 staterooms

5 reverse cycle Cruisair compressors in the starboard engine room with SMXII controllers.  One self contained unit for the enclosed aft deck.  Total 87K btu
Admin

Steve Pooler

posts 1127

9:34 am November 18, 2011
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Thanks for the report back David & glad we were able to help…  Smile

Did you calibrate high speed as I described too ?

 

Steve~
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