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Model reference

Daikin CTXG12QVJUS

Air Conditioner

1 document50 error codes18 service modes

Available documentation

Service Manual

  • Service Manual Multi-Split Type Air Conditioners RMXS-L Series299 pg
    Covers this model
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Error codes (50)

CodeMeaning
A1Indoor unit PCB abnormalityA3Drain level control system abnormalityA5Freeze-up protection control or heating peak-cut control activated due to…A6Indoor fan motor or related abnormalityA9Electronic expansion valve abnormality in BP unitAFHumidifier or related abnormalityC4Indoor heat exchanger thermistor 1 (liquid pipe) or related abnormalityC5Indoor heat exchanger thermistor 2 or related abnormalityC7Front panel open/close fault on CTXG series.C9Room temperature thermistor or related abnormalityCEPresence sensor or floor sensor abnormalityCJRemote controller thermistor abnormalityE1Outdoor unit PCB abnormalityE2Branch provider (BP) unit PCB abnormalityE3Actuation of high pressure switchE4Actuation of low pressure sensorE5Compressor motor lockE7Outdoor fan motor abnormalityE9Moving part of electronic expansion valve (Y1E or Y3E) abnormalityF3Discharge pipe temperature abnormalityF6Refrigerant overchargedH9Outdoor temperature thermistor (R1T) abnormalityJ0Branch provider (BP) liquid or gas pipe thermistor abnormalityJ3Discharge pipe thermistor (R2T) abnormalityJ5Suction pipe thermistor (R3T or R5T) abnormalityJ6Outdoor heat exchanger thermistor (R4T) abnormalityJ7Outdoor liquid pipe thermistor (R7T) abnormalityJ9Subcooling heat exchanger gas pipe thermistor (R6T) abnormalityJAHigh pressure sensor abnormalityJCLow pressure sensor abnormality
View all 50 error codes
L1Outdoor unit PCB abnormalityL4Radiation fin temperature riseL5Inverter compressor abnormalityL8Inverter current abnormalityL9Compressor start-up errorP1High voltage of capacitor in main inverter circuitP4Radiation fin thermistor abnormalityU0Low pressure drop due to refrigerant shortage or electronic expansion valve…U2Power supply insufficient or instantaneous failureU3Check operation has not been conductedU4Signal transmission error between indoor unit and branch provider (BP) unit.U5Signal transmission error between indoor unit and remote controller.U8Signal transmission error between MAIN remote controller and SUB remote…U9Signal transmission error between indoor unit and outdoor unit in the same…UAExcessive number of indoor units or mismatching refrigerant type between indoor…UCAddress duplication of central remote controller.UETransmission error between centralized remote controller and indoor unit.UFSystem is not set yetUHSystem abnormality, refrigerant system address undefinedUJTransmission error between outdoor unit and branch provider (BP) unit

Service modes (18)

  • Check Operation (Outdoor Unit)["Press and hold TEST (BS4) button on outdoor unit service PCB for 5 seconds","Test operation…
  • Field Setting Mode (FFQ - Wireless Remote)["From normal mode, hold INSPECTION/TEST button for at least 4 seconds to enter Field Set…
  • Monitor Mode (Outdoor Unit)["From Setting Mode 1, press MODE (BS1) button once","H1P LED blinks","Press SET (BS2) button to…
  • Power Transistor Check Mode (Outdoor Unit)["In Setting Mode 2, select item No
  • Refrigerant Additional Charging Operation["Turn ON power of indoor and outdoor units","Completely open gas-side and liquid-side stop…
  • Refrigerant Recovery Mode["In Setting Mode 2 with units stopped, set item No
  • Service Diagnosis (ARC452 - Method 1)["Hold TIMER CANCEL button for 5 seconds (00 appears on temperature display)","Press TIMER CANCEL…
  • Service Diagnosis (ARC452 - Method 2)["Press TEMP▲, TEMP▼, and MODE buttons simultaneously to enter diagnosis mode","Left-side number…
  • Service Diagnosis (ARC466 - Method 1)["Hold Timer Cancel button for 5 seconds (00 appears on temperature display)","Press Timer Cancel…
  • Service Diagnosis (ARC466 - Method 2)["Press center of Temp button and Mode button simultaneously","5C is displayed; select 5C with…
  • Service Diagnosis (FFQ - Wireless Remote)["Press INSPECTION/TEST OPERATION button to enter inspection mode (0 blinks on UNIT No…
  • Setting Mode 1 (Outdoor Unit)["This is the initial/default mode (H1P LED off)","If in another mode, press MODE (BS1) button once…
  • Setting Mode 2 (Outdoor Unit)["From Setting Mode 1, press and hold MODE (BS1) button for more than 5 seconds","H1P LED lights…
  • Test Operation (CTXG, CTXS, FTXS, CDXS, FDXS, FVXS - ARC452 Remote)["Press ON/OFF button to turn on the system","Press both TEMP buttons and MODE button at the same…
  • Test Operation (CTXG, CTXS, FTXS, CDXS, FDXS, FVXS - ARC466 Remote)["Press On/Off button to turn on the system","Press the center of Temp button and Mode button at…
  • Test Operation (FFQ - Wired Remote BRC1E73)["Set to COOL or HEAT operation using the remote controller","Press and hold Cancel button for 4…
  • Test Operation (FFQ - Wireless Remote BRC082A41W/BRC082A42W(S))["Press MODE button and select COOL or HEAT operation","Press INSPECTION/TEST button twice (TEST is…
  • Vacuuming Mode["In Setting Mode 2 with units stopped, set item No

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