LG ARUB115BT2 Installation Manual - Page 75

ENGLISH Test Run Self-Diagnosis Function Error Indicator • This function indicates types of failure in self-diagnosis and occurrence of failure for air condition. • Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LED of outdoor unit control board as shown in the table. • If more than two troubles occur simultaneously, lower number of error code is first displayed. • After error occurrence, if error is released, error LED is also released simultaneously. Error Display 1st,2nd LED of 7-segment indicates error number, 3rd LED indicates unit number. Ex) 211 : No.21 error of master unit 213 : No.21 error of slave 011 ¡ 051 : No.105 error of master unit Indoor unit related error Display Title Cause of Error 0 1 - Air temperature sensor of indoor unit Air temperature sensor of indoor unit is open or short 0 2 - Inlet pipe temperature sensor of indoor unit Inlet pipe temperature sensor of indoor unit is open or short 0 3 - Communication error : wired remote controller ↔ indoor unit Failing to receive wired remote controller signal in indoor unit PCB 0 4 - Drain pump 0 5 - Communication error : outdoor unit ↔ indoor unit Malfunction of drain pump Failing to receive outdoor unit signal in indoor unit PCB 0 6 - Outlet pipe temperature sensor of indoor unit Outlet pipe temperature sensor of indoor unit is open or short 0 7 - Different operation mode Operation mode between indoor unit and outdoor unit is different 0 9 - Serial No. In case when the serial number marked on EEPROM of Indoor unit is 0 or FFFFFF 1 0 - Poor fan motor operation Disconnecting the fan motor connector/Failure of indoor fan motor lock 1 1 - Communication error: indoor unit When the addressing signal doesn't respond for 3mins. suddenly, ¡ main PCB of outdoor. while the indoor unit gets the calling signal from the outdoor unit, 1 Master Outdoor Unit Inverter 21 Compressor IPM Fault 2 slave Outdoor Unit Inverter Compressor IPM Fault Inverter Board Input Over 1 Current(RMS) of Master Outdoor 22 Unit Inverter Board Input Over 2 Current(RMS) of slave Outdoor Unit Master Outdoor Unit Inverter Compressor Drive IPM Fault slave Outdoor Unit Inverter Compressor Drive IPM Fault Master Outdoor Unit Inverter Board Input Current excess (RMS) slave Outdoor Unit Inverter Board Input Current excess (RMS) Outdoor unit related error 2 3 1 Master Outdoor Unit Inverter Compressor DC link Low Voltage DC charging is not performed at Master outdoor unit after starting relay turn on. 2 slave Outdoor Unit Inverter Compressor DC link Low Voltage DC charging is not performed at slave outdoor unit after starting relay turn on. 2 4 1 Master Outdoor Unit High Pressure Switch System is turned off by Master outdoor unit high pressure switch. 2 slave Outdoor Unit High Pressure Switch System is turned off by slave outdoor unit high pressure switch. Installation Manual 75