Operation

FunctionofOutdoor Unit

Outdoor Unit

Two Comp algorithm

Inverter Comp is first priority and then Constant Comp is turning on responding to load condtion.

Operating Step

Compressor step varies considering condition such as room temp,outdoor temp, operating room number,Temp gap between room temp and set temp and so on.

LEV Control

LEV pulse is modulated to keep constant superheat or subcooling.

Out door Fan Control

Outdoor fan operates at High or Off to respond to the load condition.

R/Valve Control(Heating Model Only)

Convert R/Valve to change cooling to heating, heating to cooling.

Defrost Function

After 45 min heating operation, check the defrost condition and if outdoor pipe temp is below -

5°C(23°F) and released from deice operation in case outdoor pipe temp is over 12°C(53.6°F) or 9 min cooing mode.

To deice outdoor heat exchanger in low temp condtion, convert operating mode from heating to

Oil Return System

In single(one) comp operation duration, another comp will operate for 30 seconds every 1 hours.

Comp Overload Protection

To protect comp from being overload, protector will turn off the comp.

High Pressure Protction

If cycle pressure is too high(around 36.7 kgf/cm2), it will turn off comp A

Service Manual 47

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LG Electronics A2UH243FA0(LMU240HE), AMNH123APM0(LMAN120HNS), A2UC243FA0 (LMU240CE) service manual Function of Outdoor Unit

AMNC093APM0(LMAN090CNS), AMNH123DEA0 (LMN120HE), A2UC243FA0 (LMU240CE), AMNH123APM0(LMAN120HNS), A2UH243FA0(LMU240HE) specifications

LG Electronics has established a prominent position in the HVAC (heating, ventilation, and air conditioning) market with its diverse range of air conditioning units, including models AMNH123APM0 (LMAN120HNS), AMNH123DEA0 (LMN120HE), AMNC123DEA0 (LMN120CE), A2UH243FA0 (LMU240HE), and A2UC243FA0 (LMU240CE). Each of these models is designed to provide efficient cooling and heating solutions, boasting advanced technologies and user-friendly features.

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