Where is the eyepiece of a central mini air conditioner? - Page 4 - Consumerism - HWzone Forums
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Where is the eyepiece of a central mini air conditioner?


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If you check air conditioners in public places, you will see that a significant portion of them dismantled the original command and replaced it with a pathetic external command of meitav-tec

At the base where I served, I saw why this happens: the "power saving" sockets (a socket that cuts off the voltage after x hours) cause the air conditioner to suddenly disconnect from the voltage several times a day. When the compressor stops receiving voltage, it creates a voltage shock and reaches the electronic command. After the amount (large but final) of such blows he was burned

The original electronic command receives voltage from the air conditioner's voltage input, before the place where it disconnects the compressor. When the command is in control of the air conditioner, at the moment of disconnecting the circuit opens between the voltage (and command) and the compressor, so that the voltage from the compressor can not reach the command. When you disconnect the voltage from the outside, at the moment of disconnecting all the air conditioner is still connected together so the blow from the compressor comes to command

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Inside it is an electronic circuit that operates on very low voltage (usually no more than 12-24V). The 12V comes from such a supplier:


How such a circuit works:

The receiver has an impedance (think of it as resistance, but depends on the waveform) in the AC. It is selected so that in a clean sine wave it will transfer a few tens of mA meaning that it limits a stream as simple as a big counter in the way what 240

Later there is a rectifier that converts the voltage to DC

After me the straightener is connected simultaneously with Zener and the rest of the circle. The zener sets the voltage to 12V and the rest of the circuit is divided between them by the current coming from the receiver. The capacitor is chosen so that the current it transmits will always be larger than the current that the electronic circuit takes in Max 'so the circuit takes what it takes and the xenon absorbs the rest

The capacitor's resistance depends on the waveform. When there is a sudden jump of voltage in 240, the capacitor moves a high current jump respectively. This current passes through the capacitor, which aligns and flows and is significantly larger than what they are constructed to possess. Usually the blow is fast and not enough to happen from a single case but it happens damage accumulates

After that, enough damage is done (the capacitor, the rectifier, the xenon) and the circuit is burned (sometimes only the doubt, sometimes the entire circuit, for example, the buzzer is disconnected ...)

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  • 1 month later ...

Not like that. Look for a wireless relay module - a circuit that works on very low voltage and its outputs are relay contacts (that is, not electrically connected to the power source from which the circuit itself works)

There are those that have some relays, if your air conditioner has buttons too for temperature change etc. You can take advantage of it

You select one where the relay is in "1" only when you click on the remote control and not where 1 presses to "1" and 2 moves to "0"

It usually needs 5V or 12V and a stream of several tens of mA on each relay which is at that moment in "1"

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I did not find any.

And I did not understand how the temperature can be controlled (there is a temperature switch there).

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Note, there is also a temperature selector, both cold / heat and fan power ...

I thought of something just just cold / OFF

If you have an offer on how to make this panel all wireless I would be happy.

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I'm not sure the unit is on Contains all relays. In some of them, control is performed by the triac (right on the 240V)

The phase that reaches the panel of the air conditioner continues through it to the fan motors in the internal and external unit - they generate power surge surges and if the fire is done by the triac it can be destroyed

Look for a unit that is written with the certainty that it is based on relays.

If you also want to control the fan speeds of the internal unit (light, why not), look for a unit where at least some of the transmitters come from 3 ports (C NO NC) and do not get a phase from the input but rather a "dry touch" Other things not related to the phase)

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