LG ARNU Series User Manual

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Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Function
3.6 Pressure switch
■ Sub unit
- Sub PCB has pressure sensing switch in series between compressor and power relay.
- The state of pressure sensing switch is normally on. It has small electric current from 220V AC. Never touch
the connecting terminal with hand nor short two wires directly.
3.5 Phase detection
■ Main unit
- Inverter PCB has phase fault detection circuit. If a phase is missed or phases are reversed, error LED(red)
flickers once per second when power is on.
■ Sub unit
- Sub PCB has phase fault detection circuit. If a phase is missed or phases are reversed, phase fault error
occurs and LED 6 is on.
❇ Phase fault detection is enable only for 5 sec after power is on.

LG ARNU Series Specifications

General

Series	ARNU
Control	Remote Control
Cooling Capacity	9, 000 - 36, 000 BTU/h
Heating Capacity	9, 000 - 36, 000 BTU/h
Operating Temperature (Cooling)	18°C - 46°C
Power Supply	220-240V, 50Hz
Dimensions (Indoor Unit)	Varies by model
Dimensions (Outdoor Unit)	Varies by model
Weight (Indoor Unit)	Varies by model
Weight (Outdoor Unit)	Varies by model