LG Electronics LG3ZMSS316 Owners Guide

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Part 5. Trouble Shooting

- 76 -

Only for training and service purposes

LGE Internal Use Only

Check Point

1. Check the Input Voltage (L1~L2 ‘ 230V±10%)

2. Check Input Voltage Sensor output voltage (2.5Vdc±10%)

Is Inverter PCB Normal?

Replace inverter PCB assembly

Is input voltage normal ?

Check L1~L2 Voltage is 230V±15%

Yes

Recheck power and

installation condition

Yes

< Input Power Source Check Point >

n Error Diagnosis and Countermeasure Flow Chart

C/T

Sensor Error

• Initial current error

•

Malfunction of current detection circuit.

(Open / Short)

•

Check CT Sensor output voltage :

2.5Vdc ±5%

Display

code

Title Cause of error Check point & Normal condition

WARNING

Before checking PCB or each outdoor electric parts, wait for 3 minutes after the power is off. When measuring at standby state

of power supply, after checking the measurement mode of the meter, be careful of the short-circuits with other parts.

n Error Diagnosis and Countermeasure Flow Chart

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LG Electronics LG3ZMSS316 Quad Zone Mini Split System with 30,000 BTU, Integrated Base Pan Heater, Auto