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Post by Deleted on Aug 8, 2017 7:38:26 GMT
I think I have discovered the cause of my random current draw problem. I have temporarily disconnected the fridge, which we only run on gas, from the 12v supply. I could fix the problem temporarily just by switching off that circuit and back on again.
The domestic batteries are holding their charge much better now too. What I don't understand is what could have been causing the random voltage drop in the fridge. The 12v supply is only used for the internal light, control board and spark ignition. We never run the fridge on 12v.
Any ideas? I don't really want to buy a new fridge as this once works well on gas. Anyone know how many watts is used just for the control and ignition circuit? I did remove the light to eliminate that as a.cause with no effect.
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Post by Telemachus on Aug 8, 2017 7:48:28 GMT
I don't think they use much. My caravan fridge is a modern 3 way thing. The control board does hold the gas valve open (small current) and continuously passes a very small current through the flame (flame rectification detection) but I would have though in total, only a few 10s of milliamperes, maybe 0.1A max. My fridge is controlled by push buttons and I have on occasion found that it's switched to another mode, either mains (in which case it's not working) or 12v (in which case it's also not working since it's wired up to only run on 12v from the car supply) but I've never been sure why it's done that, maybe I've learnt on the button by accident (but it takes 2 presses in fairly quick succession to change mode)
Anyway, are you sure it is always in gas mode? Maybe you should see if you can disconnect the 12v heating element.
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Post by Deleted on Aug 8, 2017 9:14:05 GMT
I don't think they use much. My caravan fridge is a modern 3 way thing. The control board does hold the gas valve open (small current) and continuously passes a very small current through the flame (flame rectification detection) but I would have though in total, only a few 10s of milliamperes, maybe 0.1A max. My fridge is controlled by push buttons and I have on occasion found that it's switched to another mode, either mains (in which case it's not working) or 12v (in which case it's also not working since it's wired up to only run on 12v from the car supply) but I've never been sure why it's done that, maybe I've learnt on the button by accident (but it takes 2 presses in fairly quick succession to change mode) Anyway, are you sure it is always in gas mode? Maybe you should see if you can disconnect the 12v heating element. Yes, I'm going to see how it's wired up later. There are two 12v circuits as you say so it may have been wired up wrong all along. I've never understood why the batteries get depleted so quickly on this boat and I've had 2 sets of batteries in 5 years. Thanks Nick. |
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Post by naughtyfox on Aug 8, 2017 12:52:26 GMT
We manage perfectly well without a fridge. Ours is on only for special occasions. Long life milk is quite OK.
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Post by Telemachus on Aug 8, 2017 12:58:52 GMT
We manage perfectly well without a fridge. Ours is on only for special occasions. Long life milk is quite OK. How do you chill your champagne? |
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Post by Deleted on Aug 8, 2017 13:04:17 GMT
For the 12v cooling function on our fridge I added a relay switched on by the ignition switch - this means it can only be on 12v with the engine running.
Only slight drawback is having to remember to turn the gas off before cranking the engine into life along with remembering to relight the gas when the engine is shut down. If we are not cruising far I may well turn the 12v switch off on the fridge and leave it on gas anyway.
Our fridge is too old to have any interlocks between 12/240 and gas, meaning it can get two heat sources, you know if you have left the gas on as there is a distinctive hot smell that comes out of the enclosure.
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Post by naughtyfox on Aug 8, 2017 13:12:35 GMT
I care not for champagne. Un-chillfiltered single malts at hand-heat temperature, thank you. Tullibardine at present.
Fresh milk on cratch floor (cold steel above water tank) is good for a day - in Winter meat in cratch good for a couple of days.
I mean, it was minus 6 C last Christmas in Llangollen.
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