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How to do a freon recharge on roof top rv airconditioner

Posted by Anonymous on

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  • Coleman Master
  • 1,363 Answers

There are no access ports to add freon you would have to put a line tap valve on it.

Posted on Aug 10, 2015

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 127 Answers

SOURCE: Coleman roof top rv air no cool,warm compressor

No Cooling.
Turn the selector switch to “Cool” and the
thermostat to a low temperature (below room temperature).
The fan runs OK, but the unit does not cool. When the unit
housing is removed, we observe that the compressor does not
run; however, it periodically hums for 15 to 30 seconds.

Possible Causes- Check all of this before buying a new unit, that may not be the solution.

“The voltage could be low – ”
a) Check the voltage between #1 on the
overload switch and the “R” terminal of the
compressor while it is not humming. This
voltage must be 115 volts domestic USA
models or 240 volts export/overseas models.
No less than minus 10% is allowable.
b) Check the voltage from “C” or “R” of the
compressor while it is humming (trying to
start). The latter reading will probably be
lower, but it still must be 103.5 volts
minimum domestic USA or 216 volts
minimum export/overseas models.
If the first reading is above 103.5V domestic USA and
the second is under 103.5V domestic USA, there is
too much voltage drop in the lines - a situation which
must be corrected for the air conditioner to perform
safely and satisfactorily.
2. “A capacitor could be shorted, weak or open.”
Turn the power off.
Caution – There is always a chance that a capacitor is
holding a residual charge, so before touching a
terminal, discharge the capacitor as explained earlier
in this booklet.
Remove capacitors, visually examine them and test
them per instructions given in earlier section on
capacitor testing (See page 9).
If the capacitors test OK, replace them and carefully
reconnect the wires. Be sure the wires are connected
to the right terminals.
3. “Start relay contacts could be open – ” if so equipped.
Turn off all power, then check for continuity with
ohm meter between terminals 1 & 2.
4. “Compressor start winding could be open or
grounded.”
Check compressor windings per instructions. See the
section on the compressors (See page 8).
5. “Compressor could be mechanically stuck.”
This very rarely occurs and when it does, it is usually
after a lengthy shutdown. This should be considered
only after all the above possible causes have been
positively eliminated. To free a stuck compressor, use
your hermetic analyzer according to the
manufacturers instructions.

Posted on Jun 29, 2009

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1 Answer

Noisy roof top airconditioner


pull shroud and isolate where noise coming from.

Feb 17, 2013 | Dometic Rooftop RV Air Conditioner

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What is the expected air temp on a Duo Therm Roof Unit? Also can they be recharged? Thanks!


Hi,
They should run 50 -55 F or about 20 degrees less then the indoor air temp... and yes they can be recharged.....

How to add Freon to a Air Conditioner or Refrigeration System
http://www.fixya.com/support/r5638346-add_freon_air_conditioner_or

heatman101

Aug 23, 2010 | Dometic Rooftop RV Air Conditioner

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Dometic roof top rv airconditioner is not pulling any water out of the air based on condensate run-off. Is this a sign of low coolant? If so - are these types of air conditioners equiped to be re-charged...


The system is not equipped to be recharged. However there are several options to add a service port to the system. If you are staying cool there is probably no need to add refrigerant.

Jul 10, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

I have a Dometic Duo Therm rv Roof Air Conditioner Model# 59516.531.The fan is blowing and the compressor is kicking on but it is not blowing out cold air. Someone said it must be out of freon. Why would...


These are a closed system.(meaning that there is no fill valves for recharging) But a heating & cooling technician can solder them on and re-charge the system. Only problem there is to get an estimate up front, and compare it to buying a new roof unit which also comes with a new warranty, as well as keep in mind that the freon went somewhere, so there is an obvious leak that will need to be addressed as well. Most times it's wiser and cheaper in long run just to buy a new roof unit.
Are you sure that the compressor is kicking in? Did anyone remove cover on roof and check lines from compressor to see if any cooling is occurring?
These don't often leak, that's why I'm asking. Any idea how old the unit is?
Perhaps in fairly new, it's a warranty issue.

Jun 25, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

I need t recharge the freon. It takes R22. Where do I charge this system? I pulled the roof cap off and cannot find and caps to recharge the system


AC's routinely are sold/installed without charging valves.

So, unless your unit has been worked on/serviced in the past it will not have any place to charge with freon.

Note: unless you've developed a 'leak,' it is unlikely that you've lost any freon, and in the event that you have - it will take a Service Tech to install valves and charge your unit correctly.

I would call a Service Tech to assist.

hope this helps.

Jun 07, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

Installing rv roof airconditioner heat strip


I see what you see also in the manual. The difference is the Heat Strip package that part is optional and the 600212-001 with the optional heat strips becomes the new 600315-001 I talked to Dometic Duo-Therm and the models are the same but they both are not heat pumps but the new heat strip package comes on when told to go into heat mode when you change the thermostat to heat. The part you purchased will fit both model numbers you listed for your roof top air conditioner. Thanks, Sea Breeze

May 09, 2010 | Heating & Cooling

1 Answer

How do you recharge a roof top ac unit


you will need to install access valves for charging.a set of gauges and r-22 . to by freon r-22 you need to be EPA certified. Tom

Jun 13, 2009 | Dometic Rooftop RV Air Conditioner

2 Answers

Is an old unit worth fixing?


I recommend going with a new one. Both the coleman and the carrier are excellent and a whole lot more efficient that the 16 year old dometic.

May 01, 2009 | Dometic Rooftop RV Air Conditioner

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