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Old 02-08-2011, 05:13 PM   #1
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Rheem RBHC 240v ac/heat unit


T-stat is flashing, the only part of the unit that works is emergency fan it seems. I've checked voltages inside and out and transformer voltage is ok to. The float switch is operating OK , what low voltage item might be outside causing the problem ? Unless you have any other idea's , I appreciate the help

Phil


Last edited by PJMark; 02-08-2011 at 09:15 PM. Reason: edit for clarity
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Old 02-08-2011, 06:50 PM   #2
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Rheem RBHC 240v ac/heat unit


Could be a low of high pressure switch in the outside unit is doing its job.

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Old 02-08-2011, 09:10 PM   #3
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Rheem RBHC 240v ac/heat unit


I'll see if I can't jump 1 of them out in the morning with a lil daylight , not to brutally cold now thank goodness. Appreciate the comment , let you know tomorrow.
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Old 02-09-2011, 10:15 AM   #4
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Rheem RBHC 240v ac/heat unit


I brought 24v direct to the cont. coil leaving the yellow lead on , inside fan kicked in and OS cont. pulled in ok. ( yellow n red on one side of coil / brown on other ) Normally coil has just yellow n brown , not sure what that tells me ! lol

Seems the red lead is being broke by something b4 it heats up the yellow to pull in contacts , no schematic on the circuit board outside so I'm lost as to what it does .

Does the outside circuit board also control the inside contacts on heat strips ?

Also can't figure out what is causing the stat to blink , btw ... it still blinked with earlier jump I described.
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Old 02-09-2011, 12:15 PM   #5
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Seems to be a bad t-stat , now i gotta figure out how to hook-up a 5 wire Honeywell RTH221 to a 7 wire old hook-up. None of the letters on old stat seem to be on cross over directions.
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Old 02-09-2011, 01:01 PM   #6
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Doesn't seem to be a heat pump T-stat ...... back to get a 3100 , damn shame i bought it 6 months ago !
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Old 02-09-2011, 03:31 PM   #7
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Rheem RBHC 240v ac/heat unit


New thermostat is a Filtrete 3M22 I have 4 wires leftover .....

Blue- Was hooked to a 'b' terninal , directions say I don't need it but there is a 'b' on new stat

White- Was hooked to 'e' terminal , no 'e' on new stat

Yellow- Was hooked to 'y1' , new stat has 'y' and 'y2' places to hook-up, Used that on 'y' and that powered up comp. outside

Black- Wasn't used


I have the unit running but it sure don't seem to be heating up, still confused.


Edit to add info

Last edited by PJMark; 02-09-2011 at 03:56 PM.
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Old 02-09-2011, 06:57 PM   #8
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You got a Rheem heat pump, you need the blue wire connected to B and the wire on O removed.
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Old 02-09-2011, 07:03 PM   #9
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I'll try that now , it is putting heat the way it is now put taking it forever to heat up in here , thx beenhere .
Let ya know later ........
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Old 02-10-2011, 11:29 AM   #10
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Been , Heat worked the same at 1st ...... only powered the strips so low heat output till I off the emergency heat switch ( that finally kicked in the heat pump to and put out heat )
I'm wondering what will happen if I use both the orange on 'o' and the blue on 'b' but just gonna enjoy a lil heat b4 i do anymore experimenting !

I appreciate the comments .... the site is lucky to have ppl like you wondering thru the posts
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Old 02-10-2011, 12:02 PM   #11
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Rheem RBHC 240v ac/heat unit


The O and B terminals perform the same function but are opposites. One will energize the heatpump reversing valve in heat mode, but the other will energize the reversing valve in the air conditioning mode. Connecting the wire to both terminals would energize the valve in both mode. this is not a good idea
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Old 02-10-2011, 04:52 PM   #12
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In emergency heat, the heat pump can't run.
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Old 02-10-2011, 06:18 PM   #13
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Very informative , great info both of u ..... great lil website they put together here
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Old 02-10-2011, 06:21 PM   #14
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Quote:
Originally Posted by college A/C View Post
The O and B terminals perform the same function but are opposites. One will energize the heatpump reversing valve in heat mode, but the other will energize the reversing valve in the air conditioning mode. Connecting the wire to both terminals would energize the valve in both mode. this is not a good idea

This mean the wire needs to be switched over in the spring n summer ?
Now ya got me wonderin again ! I thought the valve only went into cooling with a 24v singnal

Last edited by PJMark; 02-10-2011 at 07:18 PM.
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Old 02-10-2011, 07:20 PM   #15
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No. You have a Rheem. It needs switched to heat only. DO NOT connect the orange wire to O. You don't know where its connected to. O is energized on other brands for cooling, not yours.

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