Wrong attitude, it takes time for the stove to get warm, it takes time
to warm up the house. The time to start the fire is immediately after
the power goes out. If it comes back on quickly then fine, let the
fire go out. If you wait until you're cold you're going to be very
cold before the fire gets things warmed back up.
-Curt
On Tuesday, February 16, 2021, 9:23:26 AM EST, Kaleb Striplin via
Mercedes <mercedes@okiebenz.com> wrote:
Good idea, I will see if I can find one. At the current moment it is
irrelevant anyway as the power has been off for an hour. Supposedly
will be restored by 9am. If it comes back in then, fine. If it goes
past that I will have to fire up the fireplace.
Sent from my iPhone
> On Feb 15, 2021, at 11:06 PM, Scott Ritchey via Mercedes
<mercedes@okiebenz.com <mailto:mercedes@okiebenz.com>> wrote:
>
> When all else fails, read the instructions? The basic setup is the
same for most heat pump systems except for details like TXV vs
piston/orifice. But the control electronics (typically on a defrost
control board) can do anything, like totally shut down below some
temp. Might be worth downloading and browsing the owners' manual (or
might not; some are much worse than others).
>
> -----Original Message-----
> From: Mercedes On Behalf Of Kaleb Striplin via Mercedes
> Sent: Monday, February 15, 2021 11:52 PM
> To: Kaleb Striplin via Mercedes <mercedes@okiebenz.com
<mailto:mercedes@okiebenz.com>>
> Cc: Kaleb Striplin <ka...@striplin.net <mailto:ka...@striplin.net>>
> Subject: Re: [MBZ] Heat pump question
>
> Sounds like the unit just kicked back on. Guess we shall see how the
night goes.
>
> Sent from my iPhone
>
>> On Feb 15, 2021, at 10:44 PM, Kaleb Striplin via Mercedes
<mercedes@okiebenz.com <mailto:mercedes@okiebenz.com>> wrote:
>>
>> I will be damned if it isn’t shut off again. Can say for sure
about last time but this time code is for low pressure switch open,
not the same low pressure lockout as before. Don’t see any loose or
damaged wires to any pressure switches. Jumping the pins didn’t reset
it either. Guess it will be expensive aux heat tonight.
>>
>> Sent from my iPhone
>>
>>>> On Feb 15, 2021, at 10:23 PM, Kaleb Striplin <ka...@striplin.net
<mailto:ka...@striplin.net>> wrote:
>>>
>>> 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
<mailto: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 <mailto: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 <mailto:mercedes@okiebenz.com>
>>>>>> Cc: Kaleb Striplin <ka...@striplin.net <mailto: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.
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________
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