Heat Controller FP1 lockout (low temperature)
Last Post 19 Jun 2011 07:10 PM by joe.ami. 25 Replies.
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jfuerstUser is Offline
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29 May 2011 11:53 AM
You guys are AWESOME it is nice to get good information from people that can say something other than "it has to be your flow". thank you!!

So I got out the soldering iron and soldered the jumper back together and verified it with the ohm meter.
System still locks out with the run cycle in the picture below. (with only one pump at ~4psi drop = ~14-15 gpm). The cutout happens at the point that is being measured, so the temp readings accross the board are at that point in time. ALSO the fantastic hot air that it is producing is actually from the 10kw backup strip NOT the unit itself.
I will have the service guy perform the suggested checks and definitely feel confident enough to stand my ground with the tech to see to it that this thing starts acting appropriately

Bad Geo Unit.. No cookie for you!!
Anyhow thank you again for the fantastic support. I'll update the results of the tech visit when he makes it out here.
I wish I had had my system monitor installed when the system was working so I could just reference back to then and know how it used to function.


docjenserUser is Offline
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29 May 2011 04:18 PM
Your flow was always fine, as I said, 17 gpm does not cause a lockout. Just to confirm, you soldered JW2-JP2 (the lower of the 2 jumpers), correct? So after fixing that, the unit still does not take heat out of the source, and does not put out heat when running -> refrigerant circuit.
As Bergy said, the key is to have the basic components measured, especially the heat extraction. But you already know, assuming your measurements are correct, that your flow is OK but your delta T is way too low, so your heat extraction is off. Keep us posted.


www.buffalogeothermalheating.com
jfuerstUser is Offline
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15 Jun 2011 11:03 PM
I've been out of town for a few weeks but finally had the technician out on Monday. He added ~2.5lbs of refrigerant and the system magically started working like I remember it! Says he will have to come back in a month or so when the busy season eases up to actually fix the leak.

How difficult is it to find a leak on a system like this? Is it safe to assume that it has always had a leak right from the factory, or do units develop leaks over time (~2 years or so) (using to guess how long the 2.5lbs will last before we die again).

Again, you guys rock!


docjenserUser is Offline
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16 Jun 2011 12:39 AM
Refrigerant circuit!!! I recall that Heatcontroller had a 6 year warranty on the HTV models. Call them and ask them to honor their warranty. A leak should be a material failure.


www.buffalogeothermalheating.com
acwizardUser is Offline
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16 Jun 2011 05:09 PM
Units are shipped factory charged . It is possible to have a small leak do to shipping and handling . Leaks can occur do to vibration, poor workmanship, metal fatigue, joints not cleaned prior to brazing, just to name a few.


joe.amiUser is Offline
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19 Jun 2011 07:10 PM
Posted By jfuerst on 15 Jun 2011 11:03 PM
I've been out of town for a few weeks but finally had the technician out on Monday. He added ~2.5lbs of refrigerant and the system magically started working like I remember it! Says he will have to come back in a month or so when the busy season eases up to actually fix the leak.

How difficult is it to find a leak on a system like this? Is it safe to assume that it has always had a leak right from the factory, or do units develop leaks over time (~2 years or so) (using to guess how long the 2.5lbs will last before we die again).

Again, you guys rock!


2.5 pounds is a lot (possibly 50% of the original charge). Not likely a slow leak.
Do not know what the warranty was but it may well only cover parts not labor and refrigerant. This is going to cost a couple bucks.
Installing contractor will hopefully discount repair for you.
j


Joe Hardin
www.amicontracting.com
We Dig Comfort!
www.doityourselfgeothermal.com
Dig Your Own Comfort!
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