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adi-n-chez
United Kingdom
1980 Posts |
 Posted - 09 Aug 2020 : 15:10:03
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Like many things in my life - The light is on but no ones home 
Obviously got power, but cannot hear any sign of a compressor working. Cabinet does not get colder at all.
Possible causes?
I am hoping a thermostat or some other low priced part 
I know DF did a bit of work on his 25 in the early days with Isotherm units.
Adi
Sewer Tubes ? I'd rather have a D**ncr*ft (Only Kidding) |
Edited by - adi-n-chez on 09 Aug 2020 15:22:04 |
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df
United Kingdom
5991 Posts |
Posted - 09 Aug 2020 : 20:56:41
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Chances are it's the control unit, prolly not gonna be cheap, I don't know of any tests as all mine have been fine so never looked into it.
We replaced our old compressor fridge a couple of years ago for a waeco to make batteries last longer, great plan as come lockdown the old one became the beer fridge at home on 240V and served us well, just had a week off and knowing pubs were going to be hit and miss for both beer and food we took the old fridge with us, good plan as we had a chilled beer cellar under the deck and had to raid a few times with the cabin fridge still sorting the food out, it was clipped to the engine battery while running and on 240v when shore power available.
One thing I really like about a bigger boat is the under deck shed, apparently it's a lazarrette in posher circles.....
NBAS--The communal colostomy bag of the boating community.
 Visit leomagill.co.uk |
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david67
United Kingdom
54 Posts |
Posted - 17 Aug 2020 : 19:39:43
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| I bought a 12v chiller / warmer , works on Peltier principle, no compressor etc. £80 from Argos, it's brilliant for cooling Vodka ! Says its not for perishable food but I've got cheese etc. in it no problem. |
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Mad Harold
United Kingdom
228 Posts |
Posted - 21 Aug 2020 : 11:16:02
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Could it be voltage drop?
May well work ok with a fully charged battery,but when the battery is partially discharged,there may not be enough leccy to operate the fridge.
There is a formula for calculating the diameter of the wire required for distance/max allowable voltage drop,but I have forgotten it.
(Old age and crushing penury) |
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cliveshep
Thailand
1324 Posts |
Posted - 23 Aug 2020 : 04:11:56
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It's easy:-
If sending end voltage and load PF are known.
Voltage drop EVD = IR cos#952; + IX sin#952; where abbreviations are as below
EVD – Voltage drop, line-to-neutral, volts
Es – Source voltage, line-to-neutral, volts
I – Line (Load) current, amperes
R – Circuit (branch, feeder) resistance, ohms
X – Circuit (branch, feeder) reactance, ohms
cos#952; – Power factor of load, decimal
sin#952; – Reactive factor of load, decimal
Of course, to any reasonable man that is total gibberish, there are two ways for a reasonable man to do it.
1. Wire up the load an switch on - if the wire smokes and burns out - it wasn't big enough.
2. Cheat, and go here: https://www.calculator.net/voltage-drop-calculator.html
Method 1 is quite effective but don't overdo the cable size for your 2nd attempt, 100 mm2 is probably a bit difficult to connect into a masthead LED light although adequate for an entire shopping mall.
Realistically most stuff on a boat would be quite happy with 0.75mm2 or 1.0mm2 for longer runs if the load at the other end is a couple of LED's. If the load at the other end is an anchor winch then you'd want something like battery cables to run the length of the boat, and in the middle range a fridge would probably function quite happily on 2.5mm2 but that's just me.
For 240 volt stuff - the same as your home assuming you didn't wire up the sockets with bell-wire or spare speaker cable!
Finally living the dream!
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adi-n-chez
United Kingdom
1980 Posts |
Posted - 23 Aug 2020 : 20:35:03
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Turns out it was a poor connection on the Thermostat
Initially I pulled the fridge & made a loop connection on the Thermostat connection - Bingo off she went.
Re-crimped the thermostat wires & all is fine !
Total cost about 20p
Now I have to educate Chez that the fridge is not for perishable food, its just for beer & wine............
She doesn't seem to understand that we managed for 15yrs with DF's old evaporation fridge with no issues,...
Adi
Sewer Tubes ? I'd rather have a D**ncr*ft (Only Kidding) |
Edited by - adi-n-chez on 23 Aug 2020 20:35:51 |
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df
United Kingdom
5991 Posts |
Posted - 23 Aug 2020 : 21:41:33
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You just gotta love fixes like that!
NBAS--The communal colostomy bag of the boating community.
Visit leomagill.co.uk |
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Topic |
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ISOTHERM / WAECO 12V FRIDGE
