LG Therma V ZHBW056A0 Service Manual page 98

Air-to-water heat pump

Table of Contents

Display

Title

code

D-pipe sensor (Inverter)

Air sensor

Condenser Mid pipe sen-

sor

Suction Pipe sensor

Const-D-Pipe Sensor Error

114

Injection In Sensor Error

115

Injection Out Sensor Error

n Error Diagnosis and Countermeasure Flow Chart

Is sensor connected to

PCB(Inverter) correctly?

Yes

Is sensor value correct?*

Yes

Replace corresponding

PCB(Inverter)

Cause of error

• Open / Short

• Soldered poorly

• Internal circuit error

• Open / Short

• Soldered poorly

• Internal circuit error

• Open / Short

• Soldered poorly

• Internal circuit error

• Open / Short

• Soldered poorly

• Internal circuit error

• Open / Short

• Soldered poorly

• Internal circuit error

• Open / Short

• Soldered poorly

• Internal circuit error

• Open / Short

• Soldered poorly

• Internal circuit error

Connect sensor to PCB(Inverter)

correctly

Replace sensor

Check Point

1. Estimate the resistance of each sensor.(Unplugged)

2. Check the value of the resistor of thermistor.

D-pipe sensor (Inverter)

Air sensor

Cond. Mid-pipe sensor

Suction pipe sensor

Condenser Out-pipe sensor : Normal Value of the resistor is 5kΩ at 25℃

Check point & Normal condition

1. Bad connection of thermistor connector

2. Defect of thermistor connector (Open/Short)