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Thread: Heat Pump Freezing Up
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06-02-2017, 02:42 PM #1
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Heat Pump Freezing Up
I'm having problems with my heat pump freezing up. I was alerted to this one day by a strange knocking noise. Upon investigation, the fan was scraping against a thick build up of ice. I defrosted this manually using salt and warm water.
The heatpump place suggested that there was a blockage stopping moisture getting out.
This keeps happening. The exit hole for the moisture appears to be behind what i call the grill.
I am thinking of drilling another hole in the bottom. Would this work?
I took some photos last night and you can see the ice building up inside.
Possibly a seperate issue....
Going through the photos, i noticed what appears to be a worn wire. It's the photo with the arrow on it. Any thoughts?
Annoying that my stuff always breaks. I have a 2kw electric heater that lasted a year before it broke. Now this. 20170206_010924.jpg20170206_010932.jpg20170206_010937.jpg20170206_010853l.jpg20170206_010905.jpg20170206_010900.jpg
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06-02-2017, 03:22 PM #2
drilling a couple of extra exit holes in the bottom cant hurt anything and it should help.
do you have a drip tray heater kit fitted ?
never seen anything like that on mine tbh.
David
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Andre Asagi Thanked / Liked this Post
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06-02-2017, 03:26 PM #3
Heat pumps have been used for heating swimming pools for donkey's years because they are so efficient in summer when pools are used. Naturally, they are now being promoted for koi ponds where they are also excellent in summer.
However, we mainly need them in winter when they have reduced efficiency and a tendency to ice up if the air is cold and especially if it's damp. If you take heat out of cold, damp air you cause it to drop below freezing point so the moisture in it forms ice on the first cold surface it touches. There isn't anything you can do to reduce icing up in cold, damp weather apart from install an electric defrost device which is a small electric heater and which obviously adds to the running cost.Last edited by Manky Sanke; 06-02-2017 at 03:29 PM.
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Andre Asagi, dc197 Thanked / Liked this Post
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06-02-2017, 04:50 PM #4
I haven't seen anything like this on my heat pump. Can't you alter the defrost setting so it does more defrost cycles? There's quite a few settings on my Duratect. I'm not sure what make and model you have but here is my manual. The pencil values are for winter use
2017-01-23 14.16.36.jpg2017-01-23 14.16.20.jpgLast edited by AdamKoi78; 06-02-2017 at 04:52 PM.
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familyman, Andre Asagi Thanked / Liked this Post
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06-02-2017, 06:19 PM #5
My pump freezes up on the fins at the back the same as yours Andre then it goes into defrost mode that soon melts it.
i don't seem to get the build up of ice in the bottom tray like you do, it seems to drain away ok,maybe the drain hole on yours could be blocked..
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Andre Asagi Thanked / Liked this Post
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06-02-2017, 08:04 PM #6
Hi if it helps- I have around a 10mm drain hole in the bottom of mine, plus I retrofitted the defrost kit here:
Heat Pump Drip Tray Heater Kit [Heat Pump Drip Tray Heater Kit] - £139.95 : HeatPumps4Pools
mine is not a ASHP from above, but worked fine.simple to fit...it keeps the bottom completely clear of ice. But it draws around 70w when on (below 5 deg)
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Andre Asagi Thanked / Liked this Post
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06-02-2017, 11:09 PM #7
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I don't have a drip tray. It just drips out onto the area underneath. To be honest i had never noticed any moisture underneath.
However, the first time it froze, when i heard the clunking noise, there was like a glacier underneath it. In fact i'm sure it left behind some roche moutonee after it melted.
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RJW2012 Thanked / Liked this Post
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06-02-2017, 11:12 PM #8
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06-02-2017, 11:15 PM #9
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06-02-2017, 11:18 PM #10
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06-02-2017, 11:21 PM #11
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I think it must be. Thats what Mr. CrystalClear suggested. However, i can't actually get at it to see or make sure it's unblocked.
To be honest, mine is poorly positioned but that's currently the only space i have for it.
I think a new, easily accessible hole might help. Or maybe even 2 holes.
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06-02-2017, 11:26 PM #12
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Ignore that question. I have just clicked the link so i understand now.
Interestingly, the bottom picture in the link, shows a wire very similar to the one i was concerned about in my images.
I wonder if there is already such a device in mine? But that the wire has "gone"?
Hmmmm.
Might have to dig that manual out !
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07-02-2017, 03:20 AM #13
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Some images from the manual. Can anyone suggest the settings i need for each please?
Screenshot_2017-02-06-23-11m1.jpgScreenshot_2017-02-06-23-13m2.jpgScreenshot_2017-02-06-23-13m3.jpgScreenshot_2017-02-06-23m3a.jpgScreenshot_2017-02-06-23-17m4.jpg
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07-02-2017, 03:23 AM #14
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I took some more photos of that thing on the back too and other bits.You can see where it's situated too. It IS the reccommendex 30cm from the fence with the ivy on.
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07-02-2017, 03:28 AM #15
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Here are the photos....
20170206_234314.jpg20170206_234349.jpg20170206_23453.jpg
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06-01-2019, 09:45 AM #16
Last edited by Stickleback; 06-01-2019 at 09:47 AM. Reason: grammer
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06-01-2019, 01:54 PM #17
hi guys sorry to here this , things always goes wrong when you need them the most , this is why i went gas in the filter house . i had my break down a few weeks back .boiler parts are easy to get . good luck
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06-01-2019, 07:49 PM #18
First thing is clear the ice, then check the drainage hole/holes.
Drip tray heater, worthwhile having.
I suspect it is de-icing ok, that’s why you have the build up of ice, it is thawing out and not clearing the ASHP.
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08-01-2019, 09:13 PM #19
set Perameter 4 to -5 and extend the cleaning time to 4 minutes if you have it wired into a correct electrical feed it’s just when I had mine it started blowing fuses in Euro plug adaptor if cleaning time set any longer until I got a sparky to change the feed to sockets supplying the heat pump socket with a different breaker and he put me an outside Euro socket on wall so ididnt need adaptor
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09-01-2019, 09:42 AM #20
Best plants to remove Nitrate
pug has a very impressive veg filter on his pond, have a look at some of his his youtube videos....