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Automatic On/Off Problem?

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( 2 Votes )
This problem can be cause by a couple of possibilities (Ranked in Priority)
  1. A faulty miniature aircon On/Off switch, Easiest & Cheapest To Repair
  2. A faulty aircon remote controller that keeps sending signal repeatedly
  3. A faulty aircon PCB (printed circuit board), indoor unit
  4. A faulty aircon PCB (printed circuit board), outdoor unit.
    * If it is an Inverter system, which is not common yet the most expensive to repair.
ac-switch

This is the image of a miniature aircon switch found behind the cover of the ON/OFF switch button. If the switch had gotten wet by leaking water from the fan coil unit, it will turn faulty as it behaves like you had pressed the switch, thus turning ON/OFF by itself. The simplest thing and most economical way to do is to remove the faulty switch because most people do not use it at all.

A faulty aircon remote controller that keeps sending signal repeatedly.
If your aircon remote controller is faulty, it may keep sending out signals repeatedly even when you are not pressing the button. Bring it to another air conditioner that operates using the same remote controller (if there is any) to see if the problem migrates. If it does, discard the faulty remote controller and buy a new one.

A faulty aircon PCB (printed circuit board, the electronics board), indoor unit.
If yours is an obsolete aircon model, fear not, it can be modified using another brand's remote controller equipped with a new remote controller.

A faulty aircon PCB (printed circuit board, the electronics board), outdoor unit; if it is an Inverter system.
  • * If it is an Inverter system, which is not common yet the most expensive to repair.
This only happens when it is an Inverter type of air conditioner. An inverter air conditioner is a dynamic system whereby the indoor unit and outdoor unit communicates in a 2-way manner. Some models are equipped with a condenser "test run" function. Thus, if the outdoor PCB gives trouble, it can turn on the indoor system. As mentioned before, we normally check the miniature switch first (outdoor unit).

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how to check air con outdoor units in PCB(many kinds)
written by stunomatic, June 05, 2010
can you tell how to troubleshooting in outdoor unit PCB?Daikin, Mitsubishi, fujisu, etc...

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Automatic On/Off Pro
can you tell how to troubleshooting in outdoor un
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loads of copy and paste craps
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thanks for this information.i will request for dra
About 家和 Aircon Serv
was kinda skeptical reading comments as such, alwa
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Thanks a lot! CHeers!

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