Question about LG LS-L1210CL Mini Split Air Conditioner

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What happens when i use a one horsepower for the indoor and a 1.5horsepower for the outdoor of my split unit..cos i'm presently in this situation after my 1.5hp indoor unit got spolit i had to use 1hp instead and since then my a.c has been malfuntioning i want to know if the mix affects the system(a.c) operation. thanks

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Maybe if you combined this unit the problem may be occuring is possible icing of your indoor unit but it can contol your thermostat but try to see what happen i think it will work.

Posted on Mar 19, 2011

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Posted on Jan 02, 2017

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This fault code indicates a communication error between the indoor and outdoor units; this is usually caused
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Testing
• Check Outdoor and Indoor Power Supply Voltages ( 230V ±10% ) and correct as necessary.
• Check for any mis-wiring or loose connections and correct as required.
• Check the resistance between communication line and GND. (Normal: Over 2M).
• If one Indoor unit operates normally Outdoor PCB is generally normal.
Turn on the power and start the indoor unit in cooling, set the temperature to 18ºC; the serial communication
signal will only be present for the first 3 mins of operation.
Set your meter to DC Volts, Test between terminals 5 (Red probe) and 2 or Earth (Black probe) of the outdoor
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If the Voltage is not present disconnect the terminal 5 cable, test the Voltage between this wire (Red probe)
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1 Answer

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You need five wires(two #10 and three #12) to the outdoor unit, leaving your house, and thee wires(#10) coming from the breaker to your indoor unit inside your house.

This ypical arrangment(all of them use three wires fro the breaker), yet there are other units which may require 6-7 wires connected to the the outdoor unit depends on the added features to the unit.

Regards,

Gulftecheng

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