Well the blackout appears to have rolled our way. It went out around 7 and the text notification from PSO says estimated to be back on at 9.
It’s -9 out right now and down to 63 in the house (I normally keep it at 68. Sent from my iPhone > On Feb 15, 2021, at 11:38 PM, OK Don via Mercedes <mercedes@okiebenz.com> > wrote: > > As Allen said, when there's no heat in the air, it can't pump any, and is > probably smart enough not to try. If the aux heat strips are working, then > it's doing what it's supposed to do. Leave it alone and get some sleep (if > the power stays on). > OG&E is threatening rolling two hour blackouts if demand doesn't go down. > With the temp dropping below -12°F tonight, I don't see that happening. > >> On Mon, Feb 15, 2021 at 10:44 PM Allan Streib via Mercedes < >> mercedes@okiebenz.com> wrote: >> >> I think you're below the temps where a ambient-air heat pump really does >> anything at all. But as I said earlier I'm not speaking from experience. >> >> I'd fire up the wood stove if it were me. >> >> Allan >> >> >> Kaleb Striplin via Mercedes <mercedes@okiebenz.com> writes: >> >>> Just noticed outside unit was shut off again. Coils had no frost on them >> at all but it was in low pressure lockout. Reset it and forced a defrost >> away way. It’s down to -4 at the moment. I wonder if it’s just too damn >> cold for it and pressure is dropping, or if it really is low on charge. If >> so, can these things even be charged in the winter? Or do they have to be >> done during the warmer months? Btw supposed to get down to -14 tonight. >>> >>> Sent from my iPhone >>> >>>> On Feb 15, 2021, at 5:23 PM, Kaleb Striplin <ka...@striplin.net> wrote: >>>> >>>> Checked it a little while ago and the coils are clear. >>>> >>>>> On 2/15/2021 3:22 PM, Kaleb Striplin wrote: >>>>> It’s been running all day without issue. I can’t say I have noticed if >> it’s ran a defrost cycle or not. I think here shortly I will go out and >> look at the coils and see if they are clear or have started frosting up >> again. >>>>> >>>>> Sent from my iPhone >>>>> >>>>>>> On Feb 15, 2021, at 2:17 PM, Scott Ritchey via Mercedes < >> mercedes@okiebenz.com> wrote: >>>>>> >>>>>> Probably, given the outside temps and state of charge, the gas >> pressure going into the compressor gets too low if ice prevents the coils >> from absorbing enough heat to raise the pressure (from that very cold air). >>>>>> >>>>>> -----Original Message----- >>>>>> From: Mercedes On Behalf Of Kaleb Striplin via Mercedes >>>>>> Sent: Monday, February 15, 2021 10:31 AM >>>>>> To: mercedes@okiebenz.com >>>>>> Cc: Kaleb Striplin <ka...@striplin.net> >>>>>> Subject: Re: [MBZ] Heat pump question >>>>>> >>>>>> Well I went out and checked it. When I looked at in there was no >> frost on the coils that I could see in the center part. I pulled the cover >> and sure enough it was blinking a low pressure lockout. With the side cover >> off I could see some frost on the outside of the coils, not a whole lot >> though. I shorted the test pins to reset it and it kicked back on. I >> shorted them again to force a defrost. Defrost ran for about 5-10 minutes >> and once frost was clear it kicked back into heat mode. >>>>>> >>>>>> Since replacing the defrost board with attached sensor last year, I >> have not had a problem sense. Why the heck did it happen again? I know it >> has a temp sensor for the coils. Do these work by going into a defrost >> cycle on a timed basis if the temp sensor is below a certain temp? Or do >> they sense the coils are freezing up and enter defrost when needed (not on >> a timed scheduled). >>>>>> >>>>>> From what I recall, some old systems did not have a temp sensor and >> just went into defrost every so often. I think some systems sense when it >> needs to be done. Others I think are still timed but only do it when temp >> is below a certain point. This is a 2008 Rheem running on 410 so I am not >> sure. If mine runs on a timer only when temp gets low maybe it is so cold >> that it simply did not reach its run time to defrost soon enough before it >> started frosting up, or perhaps it is sucking in blowing snow which caused >> it to frost up faster? >>>>>> >>>>>>> On 2/15/2021 9:03 AM, Kaleb Striplin via Mercedes wrote: >>>>>>> It is now -3 outside, not sure how low it got last night. Anyway, >> heat >>>>>>> pump has been running pretty much non stop for the last few days with >>>>>>> the aux heat kicking on occasionally. Yesterday afternoon aux heat >> was >>>>>>> on quite a bit as it never got over 4 yesterday. This morning when I >>>>>>> woke up outside unit was running as normal. A little while later I >>>>>>> happen to look out and it is shut down. Normally when it goes into >>>>>>> defrost it will shut down for a moment then fire back up pretty >> quick. >>>>>>> It did not appear to be in a defrost cycle. I had issues before >> where >>>>>>> the temp sensor on the coils was evidentially bad because when it got >>>>>>> below freezing it would seemingly randomly never enter defrost cycle >>>>>>> and would frost over, which would then put it in a low pressure >>>>>>> lockout. I would have to jump the pins on the board to reset it and >>>>>>> force a defrost then it would be fine again for a while. Last year I >>>>>>> replaced the defrost board which has the temp sensor hard wired on >> it. >>>>>>> Never had a problem since. >>>>>>> >>>>>>> Anyway I was about to throw on a coat and go outside and pull the >>>>>>> cover and see if the board was flashing an error code and it started >>>>>>> back up. It is now about an hour later and I notice the outside unit >>>>>>> is not running again. I am not sure how long it has not been running >>>>>>> but I know its probably be at least 10-15 minutes. Is there some >> sort >>>>>>> of reason at these low temps that the outside unit would shut itself >>>>>>> down for a period of time then fire back up? Does the system >>>>>>> determine that it is so cold outside that the outside unit is not >>>>>>> producing any heat anyway and shuts itself down for a while? I will >>>>>>> wait a little bit longer and see what happens then go out in the >>>>>>> blowing snow to pull the cover and check the board to see if its >>>>>>> blinking any codes. >> >> _______________________________________ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> >> > > -- > OK Don > > "Whenever you find yourself on the side of the majority, it is time to > pause and reflect." Mark Twain > > “Basic research is what I’m doing when I don’t know what I am doing.” Wernher > Von Braun > 2013 F150, 18 mpg > 2017 Subaru Legacy, 30 mpg > 1957 C182A, 12 mpg - but at 150 mph! > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
