LG General Wall Mounted-Inverter Type - Manual (Page 22)

22 Room Air Conditioner
Part 2 Functions & Controls
5.8.2 18,24,30kBtu/h Model
• Function
: Power module failure protection by checking the temperature of heat sink.
There is a temperature sensor for checking the heat sink temperature.
• Heat sink sensor failure error
Short Check : if temperature ≥130°C(266°F)
Open Check : if temperature < - 30°C(-22°F)
System will go in self diagnosis (Error code 65) is displayed and product stops.
• Heat sink temperature control
a) Heat sink temperature < T2 : No limitation on compressor frequency
b) T2 ≤ heat sink temperature < Toff : Compressor frequency down by 5 Hz
c) Heat sink temperature ≥ Toff : Compressor will be off.
System will stop if this situation occurs 5 times in 1 hour and error code will be generated also self diagnosis will
start.
If high temperature situation occurs 5 times in 1 hr system counts 1 error and after that 4 times if this situation
occurs system stops and give error code.
If the temperature reached Toff condition system will count 5 times after that and system will stop with error
code.
COMP
Hz
Toff=85 °C(185°F)
T2=75
°C(167°F)
OFF
Set
frequency
Set
frequency
Set
frequency
Heat Sink temp
5 Hz
Down
5 Hz
Down
T1=70
°C(158°F)