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I/O rocker switch markings, what are they?

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I have a pair of switches on my TT fridge labeled- I/O,

What does the I/O stand for?



Is it. . Incomplete and On or is the O for off?

Short of taking it apart to test I can't tell just by operating the

switch because there is no indicator and its simply a mode switch

where you won't notice a visual or auditable change. I knew at one time I think but can't remember if I knew or not! :-laf



I do know what each switch is for just not what is on or off.



edit. . ok I did confirm O is for "off", but I have no idea what the I is suppose to represent. At least part of the mystery is solved.
 
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"Wherever practical, markings should use internationally recognized symbols, so that their function can be understood without the use of a specific language. An example is the use of O and | as markings on primary power switches. A source of such symbols is the standard IEC 417. Note that using the words 'ON/OFF' for the mains switch would mean that the product does not comply with the standard in non-English speaking countries. "
 
It's a Climate Control Switch. "I" is off, "O" in on. It says in my book that it's for summer months and heats to evaporate the water droplets between the freezer and the fresh food compartment. It also mentions that it's 12V and you need to be close to a battery charger if you use it.
 
There are two states to a digital bit in computers. There is O or off and 1 or on. Think of a light bulb. Its either on or off. Hence, the international symbols of on-off.
 
hcole has it, O is a zero and I is a one. A zero means no power, a one means power.

As Blu-Meanie said, this turns on the heater on the front of the shelf between the ice box and the refreg. It stops condinsation from forming on the outside of this shelf. it runs on 12v and does draw an amp or 2 so if your dry camping (running on your batteries) it will use some power.
 
Well, that shows ya what can happen in the 70 feet from the trailer to the computer. Need to be re-trained in that distance. Instructions for me are only guaranteed for 50 feet or 50 seconds. 0 - off I - on. I have never used it.
 
Guess it was good I posted cuz there is some confusion on a circuit that does not have an obvious on/off appearance. In the future it will be more easy to remember now that I think in terms of binary, Thanks!
 
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