LG LAU095HV Svc Manual page 51

General wall mounted-inverter type

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Part 4 Trouble Shooting

Error code

Description

Heat-sink Temp. is over

95°C(203°F)

Heat-sink TH.

is open or short

Check flow

Heat-sink TH is connected to

outdoor PCB assembly?

- Connect to CN-TH2 in

outdoor PCB assembly

9k,12kBtu/h Model Heat-sink Thermistor resistans check

Only for training and service purposes

• Heat-sink TH. is damaged(short or open).

• Heat-sink Temp. is over 95°C(203°F)

• Damage or defect on the sensing circuit of outdoor pcb assembly.

(R01H, R02H, C01H)

YES

Heat-sink TH. in INV-IC is

Right ?

Check heat-sink TH.

- Measure resistance of TH.

(about 10kΩ at 25°C(77°F))

120

100

Ω

20 30 40 50 60 70 80 90 100110 120 130

- 50 -

Cause of error

YES

Sensing circuit of outdoor

pcb is right ?

- Check soldering state of

R01H, R02H, C01H

R-T Graph

Temperature[˚C]

LGE Internal Use Only