LG MULTI V WATER IV ARWN120LAS4, Installation Manual, Page: 72 / 79

72 Outside Unit 72 Outside Unit
Test Run
Display Title Cause of Error
Outside Unit related Error
3 6 * Master Outside Unit Low Compression Ratio Limited Master Outside Unit stayed under low Compression limit for 3 minutes
3 9 *
Master Outside unit Communication error between
Master outside unit PFC and inverter board Master Outside unit inverter compressor current detection (CT) sen-
sor disconnection or short circuit
4 0 *
Master outside unit inverter compressor CT sen-
sor error Master outside unit inverter compressor current detection (CT) sensor
disconnection or short circuit
4 1 *
Master outside unit inverter compressor discharge
temperature sensor error Master outside unit inverter compressor discharge temperature sen-
sor disconnection or short circuit
4 2 * Master Outdoor Unit Low Pressure Sensor Fault Master Outdoor Unit Low Pressure Sensor open or short
4 3 * Master Outdoor Unit High Pressure Sensor Fault Master Outside Unit High Pressure Sensor open or short
4 4 * Master Outside unit air temperature sensor error Master Outside unit air temperature sensor disconnection or short circuit
4 6 * Master outside unit suction temperature sensor error
Master outside unit suction temperature sensor disconnection or
short circuit
4 9 * Master outside unit IGBT temperature sensor error
Master out side unit IGBT temperature sensor disconnection or short
circuit
5 0 * Master outside unit 3 phase power missing Master outside unit power line phase missing
5 1 *
Over-capacity (Indoor unit capacity sum is exces-
sive) connection Excessive connection of indoor unit connection display value
(Different from outside unit)
5 2 *
Communication error with master outside unit in-
verter controller
When the inverter controller signal is not received from the master
outside unit inverter controller
5 3 *
Communication error with master Outside unit
controller and indoor unit When the indoor unit control signal is not received from the master
Outside unit controller
5 7 *
Communication error between Master outside unit
inverter controller Failing to receive inverter contoroller signal at Master Outdoor Unit
controller
5 9 * Mixing Installation of Sub Outdoor Unit Mixing Installation of Old Sub Outdoor Unit and New Slave Outdoor Unit
6 0 * Master outside unit inverter PCB EEPROM error Master outside unit inverter PCB EEPROM ACCESS error
6 2 * Master outside unit inverter IGBT over-rise error Master outside unit inverter IGBT when the temperature rises above 110 ℃
6 5 *
Master outside unit inverter IGBT temperature
sensor error Master outside unit inverter IGBT temperature sensor disconnection
or short circuit
7 1 * PFC CT Sensor Error of Master Outdoor Unit Master Outdoor Unit PFC CT Sensor open or short
8 6 * Master outside unit master PCB EEPROM error
Communication error between master outside unit master MICOM and
EEPROM or EEPROM missing
8 8 * PFC PCB EEPROM error
Communication error between master outside unit master PFC and
EEPROM or EEPROM missing