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Old 06-12-2010, 08:26 PM   #1
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New Rheem Condenser RPQL-024JEZ Problems


I hope someone can help. I had two new Rheem heat pump unit intalled two months ago and now one is shutting down during the hotest time of the day. I checked the condenser unit and found the 7-segment LED display diagnostic code L23, this code refers to a High Pressure Control lockout.
Does any one know what could be causing a new system to do this? by any chance could a undersize liquid line cause this fault. the reason I ask this is that the contractor did not change the line servicing the old unit (in wall) he solder the new bigger diameter line to the existing one.
attached are several pictures of the installation perhaps a trainned eye could detect some error.
The indoor Air Handler is Rheem model - HM2417JA - 24,000 BTU/7.0 kw. Indoor CFM 800.
Line Size for 2 ton unit - connection size 3/8" - Line size allowed 1/4" upto 23', 5/16" & 3/8" upto 25' vertical separation

The line/tubing shown on the picture is 1/4" OD coming from the wall and 3/8" to the unit.
Question what will happend if their is bend on the line would this restrict the capacity of the fluid to the unit? and cause the High pressure shut down?

Regards

Attachment 21572

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New Rheem Condenser RPQL-024JEZ Problems-100_7142.jpg

New Rheem Condenser RPQL-024JEZ Problems-100_7143.jpg

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New Rheem Condenser RPQL-024JEZ Problems-100_7121.jpg  


Last edited by gxsalas; 06-13-2010 at 12:50 PM. Reason: additional Line size info.
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Old 06-12-2010, 09:03 PM   #2
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New Rheem Condenser RPQL-024JEZ Problems


What size is the smaller line.
And what is the model number of the new indoor coil.

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Old 06-12-2010, 09:09 PM   #3
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New Rheem Condenser RPQL-024JEZ Problems


What's the OD of the old liquid line? Looks like 1/4" and that will not work with 410A.
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Old 06-12-2010, 09:13 PM   #4
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New Rheem Condenser RPQL-024JEZ Problems


I think Rheem allows 1/4" on their 2 ton. 5/16 on their 2.5 ton.
But it could be that it needs min 5/16" on the 2 ton. Can't remember anymore.
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Old 06-13-2010, 09:38 AM   #5
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New Rheem Condenser RPQL-024JEZ Problems


Not really related to the problem at hand, but what's tapped off your A/C disconnect? That conduit coming out of the right-hand side. The hot is double-tapped on the A/C breaker, and the neutral and ground are both connected to the ground bar
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Old 06-13-2010, 11:05 AM   #6
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New Rheem Condenser RPQL-024JEZ Problems


Probably overcharged. Have the installer change the breaker to a 30 amp instead of that 40 amp while he's there and fix the wiring problem McSteve pointed out.
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Old 06-13-2010, 12:43 PM   #7
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New Rheem Condenser RPQL-024JEZ Problems


Previous owner riged the water sofner to the A/C disconnect, it is out now I am in the process of connecting a sub-panel to provide a proper connection for the water sofner and the additional lighting and recepticals I am in the process of adding.
Thank you very much for the advise.

I changed the braker to a 30 A switchable at the cut off box to protect the unit.
Thanks you
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Old 06-13-2010, 12:59 PM   #8
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New Rheem Condenser RPQL-024JEZ Problems


If you are in Florida and get brownouts/lightning storms etc you may want to investigate a whole home surge protector. A major brand like Siemens or Square D is worth looking into. I am not sure they work 100% but some research on the web may help and advice from electricians.
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Old 06-13-2010, 08:42 PM   #9
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New Rheem Condenser RPQL-024JEZ Problems


I have a whole home surge protector installed by Progress Energy (at the meter). The unit will shut down mid-day and will not restart untill late afternoon about 6:00 PM, by that time bedroom area has reached 82 degrees.
I changed the cut off switch to a fusable 30A, no luck the braker did not trip. The unit just won't start.
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Old 06-14-2010, 06:24 PM   #10
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New Rheem Condenser RPQL-024JEZ Problems


Looking at Rheem's Heat pump refrigerant line size info for the RPQL 2 ton. The maximum "Total Equivalent Length" for 1/4 inch line is 25 feet. That means you have to take into account elbows and other restrictions in the line. An elbow might be considered the equivalent of 2 feet of line. Not sure what it is. But if your line set is over 25 feet you need to go larger. 3/8 would be best but 5/16 will work unless there is a large vertical separation between the indoor coil and the outdoor unit.
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Old 08-10-2010, 10:21 PM   #11
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New Rheem Condenser RPQL-024JEZ Problems


gxsalas, I am having this same exact problem with the same Rheem unit, RPQL024JEZ. I also have 1/4'' in the house running out to the unit. I'm getting the L23 code as well.

Was wondering if you had found the cause of your problem. Really appreciate your time and everyone's previous replies to this thread.
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Old 07-21-2011, 07:32 PM   #12
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New Rheem Condenser RPQL-024JEZ Problems


I too am getting L23, very hot day, fan not turning.

curious what actual outer dimension is on 1/4 line to verify what I have.

also curious about comment regarding vertical height between indoor and outdoor unit. I have split system with same units at both locations. The one running now with no problem has about 50' lines with 40 of that being vertical to 3rd FL roof of rowhome.

did both guys get this fixed ?
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Old 07-21-2011, 07:36 PM   #13
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New Rheem Condenser RPQL-024JEZ Problems


Refrigeration, A/C copper dimension is the OD. So 1/4" measures 1/4" outside dimension.
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Old 07-21-2011, 07:50 PM   #14
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New Rheem Condenser RPQL-024JEZ Problems


http://natureaircorp.com/downloads/r...ifications.pdf

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