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Author Topic: Immersun Fan Fault  (Read 1345 times)
linesrg
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« on: July 12, 2018, 06:52:03 AM »

Good Morning All,

The cooling fan on my Immersun had been sounding increasingly rough of recent culminating in the unit going into a fault mode. The fault code was No. 13 and identified as 'Fan Fault'.

As there is only the one fan it isn't rocket science as to the culprit.

The fan is secured by two Torx headed screws to the heatsink.

Removing was straight forward and there was nothing obviously wrong mechanically. I blew all the dust off it and on the second restart the Immersun is now running again.

The fan is a 5V brushless 3 wire type and is identical in appearance to this eBay item (and I do mean identical even down to the label) - https://www.ebay.co.uk/itm/1Pcs-DC-Brushless-Cooling-PC-Computer-Fan-5V-5010-50x50x10mm-0-16A-3-Pin-Wire/142756538281?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

I've just ordered 2off, really I should have ordered more and just stuck them on the shelf. My own experience is that this fan has lasted about 15 months.

Regards

Richard
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dan_b
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« Reply #1 on: July 12, 2018, 08:50:59 AM »

Is yours a Mk1 or Mk2 ImmerSUN? 
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Westie
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« Reply #2 on: July 12, 2018, 08:53:13 AM »

I'd spend a little more and make sure it's has ball bearings. More of the cheapies that don't mention the bearing type usually have sleeve bearings which with continuous use seize up in a year or so.

https://www.ebay.co.uk/itm/1Pcs-50mm-x-10mm-5010B-DC-12V-0-1A-2-Pin-Brushless-Cooling-Fan-Ball-Bearing-B2/322974253057?hash=item4b32c40001:g:RD4AAOSwxzdaS5DG

« Last Edit: July 12, 2018, 08:55:21 AM by Westie » Logged

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Philip R
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« Reply #3 on: July 12, 2018, 09:35:43 AM »

£1.56 ea, if if is that cheap then there is a good reason why?
You should heed Westies advice an go for a fan with  ball bearings fitted. After all, you could be away on a job, and your immersun fails again for the same reason, and end up degrading components inside the immersun because it is running hotter than it needs to.
I was taught that an 8 degree increase in temperature, halves the life. Hence importance of cool running electronics, electrical machines etc.

Philip R
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TT
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« Reply #4 on: July 12, 2018, 10:07:40 AM »

The high temps of Aberdeen!
It's just as hot in Fife too, I may go and check the inverter in the loft as I don't have any monitoring equipment.
Export meter at the front door electricity cupboard
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linesrg
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« Reply #5 on: July 12, 2018, 11:14:32 AM »

Westie,

Presumably the S suffix stands for sleeve and B for bearing? I take your point but the current fan is 5V and your quoting a 12V replacement with only two wires. Currently trying to a find a 5V fan with a bearing and 3 wires.......... and struggling.

Regards

Richard
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« Reply #6 on: July 12, 2018, 02:22:33 PM »

Westie,

Presumably the S suffix stands for sleeve and B for bearing? I take your point but the current fan is 5V and your quoting a 12V replacement with only two wires. Currently trying to a find a 5V fan with a bearing and 3 wires.......... and struggling.

Regards

Richard

Yep, it can be an issue, try CPC.  I've had to go up or down in size to get the right fan but it's easy enough to bodgeneer it,  trhe point is you'll only have to do it once.

http://www.easyflip.co.uk/CPC_Digital_Catalogue/?page=3513
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« Reply #7 on: July 12, 2018, 03:21:41 PM »

Mine is also on its last legs, still works but occasionally makes a horrid rasping sound, then I give it a good whack and its ok again. fingers crossed!

I also agree about getting a ball bearing one, but I cannot find one with 3 wires either so two off the sleeve ones is ordered from China. facepalm

Mine has lasted about 3 years, although it has occasionally been making that orrid sound for over a year now. hysteria
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« Reply #8 on: July 12, 2018, 04:55:21 PM »

Don't know what the 3rd wire is for, but could you use a larger fan and use the existing 5volt supply to energise the coil of a suitable relay and switch a larger fan on/off via an external power supply
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Westie
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« Reply #9 on: July 12, 2018, 05:16:45 PM »

Don't know what the 3rd wire is for, but could you use a larger fan and use the existing 5volt supply to energise the coil of a suitable relay and switch a larger fan on/off via an external power supply

The third wire is the speed ref from a hall effect sensor, it outputs a signal at the rotation speed of the fan, if you use a two wire fan you'll get a fan failure warning.
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Antman
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« Reply #10 on: July 12, 2018, 07:25:42 PM »

Try http://uk.farnell.com/sepa/mfb50e05a-4-tray/fan-dc-axial-miniature-tc/dp/1217973?st=5V%20fan but only 14 left and discontinued line.

Antman
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knighty
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« Reply #11 on: July 12, 2018, 07:32:23 PM »

it's hard to find a high end 50mm fan - if it was 40mm there's be hundreds to pick from because they're used in computers

https://www.ebay.co.uk/itm/310763921175

this is the only brand I can see that I've heard of
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linesrg
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« Reply #12 on: July 12, 2018, 08:20:28 PM »

Antman,

Good find although not exactly cheap.

Difficult to bodge engineer there really isnít a great deal of room. Iíll provide a picture later.

I've ordered one as an existing trade customer (saving £3.95 + VAT on P&P) so the fan comes to £10.34 including VAT.

Regards

Richard


* IMG_0606.jpg (546.82 KB, 4032x3024 - viewed 171 times.)
« Last Edit: July 12, 2018, 11:05:20 PM by linesrg » Logged

16 BP380 on a Lorentz ETATRACK1000/SB1700, 16 Chinese 80W/SB1700, 16 BP380/SMA SB1700. CTC GSi12 + Ecosol + Flowbox 8010e/Gledhill ASL0085 EHS/3 Navitron 4720AL solar ET panels and Immersun T1060/ T1070/ T1090. 7 Tianwei 235W/ Aurora PVI 3.6kW/ Growatt SP2000 c/w 5kWhr battery and a Renault Zoe
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« Reply #13 on: July 17, 2018, 04:52:59 PM »

I may live to regret this! My mk 1 has been running for nearly 5 years and just passed the 10,000 kwh into the tank.
So far no strange noises.

Regen
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« Reply #14 on: July 17, 2018, 05:19:21 PM »

Don't think there is a fan in the mk1.
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