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Model reference

Daikin RZQ18PVJU9

Air Conditioner

1 document48 error codes11 service modes

Available documentation

Service Manual

  • Service Manual RZR-P, RZQ-P(9) Series Cooling Only / Heat Pump R-410A 60Hz202 pg
    Covers this model
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Error codes (48)

CodeMeaning
A0Error of external protection deviceA1Indoor unit PCB abnormalityA3Drain water level system abnormalityA6Indoor unit fan motor abnormalityA7Swing flap motor abnormality/lockA8Abnormal power supply voltageA9Electronic expansion valve coil abnormalityAFDrain system abnormalityAJCapacity setting abnormalityC1Transmission error between indoor unit PCB and fan PCB (FBQ only).C4Heat exchanger (liquid pipe) thermistor abnormalityC5Heat exchanger (gas pipe) thermistor abnormalityC6Combination error between indoor unit PCB and fan PCBC9Suction air thermistor abnormalityCCHumidity sensor system abnormalityCJRoom temperature thermistor in remote controller abnormalityE1Outdoor unit PCB abnormalityE3High pressure abnormalityE4Actuation of low pressure sensorE5Inverter compressor motor lockE7Outdoor unit fan motor abnormalityE9Electronic expansion valve coil abnormality (outdoor)F3Discharge pipe temperature control errorF6Refrigerant overchargedH3High pressure switch system abnormalityH7Outdoor unit fan motor signal abnormalityH9Outdoor air thermistor abnormalityJ3Discharge pipe thermistor abnormalityJ5Suction pipe thermistor abnormalityJ6Outdoor unit heat exchanger thermistor abnormality
View all 48 error codes
JAHigh pressure sensor abnormalityJCLow pressure sensor abnormalityL1Outdoor unit PCB abnormalityL4Radiation fin temperature riseL5Momentary overcurrent of inverter compressorL8Electronic thermal (time lag)L9Inverter startup errorLCTransmission error between control and inverter PCBP4Radiation fin thermistor abnormalityU0Refrigerant shortageU2Power supply voltage abnormalityU3Check operation not executedU4Transmission error between indoor units and outdoor unitsU5Transmission error between remote controller and indoor unitU8Transmission error between main and sub remote controllersUETransmission error between centralized remote controller and indoor unit.UFSystem is not set yetUHSystem automatic address setting in progress after first power ON.

Service modes (11)

  • Check Operation (Outdoor Unit)["Press and hold the TEST button (BS4) on outdoor unit PCB for 5 seconds.","Test operation starts…
  • Field Setting Mode (BRC1D71)["From normal mode, press and hold the INSPECTION/TEST operation button for 4 seconds or…
  • Field Setting Mode (BRC1E71)["Press and hold Cancel button for 4 seconds or more during backlight lit to enter Service Settings…
  • Inspection Mode (BRC1D71)["Press the INSPECTION/TEST button once from normal mode.","Error code display blinks.","Press…
  • Outdoor Unit Monitor Mode["From Setting Mode 1, press MODE button (BS1) once.","H1P LED blinks.","Press SET button (BS2) to…
  • Outdoor Unit Setting Mode 1["Press MODE button (BS1) once from Setting Mode 2 or Monitor Mode to enter Setting Mode 1.","H1P…
  • Outdoor Unit Setting Mode 2["From Setting Mode 1, press and hold MODE button (BS1) for 5 seconds.","H1P LED turns ON.","Press…
  • Service Mode - Display Service Data (BRC1D71)["Enter Field Setting Mode by pressing INSPECTION/TEST button for 4 seconds or more.","Press…
  • Service Mode (BRC1E71 - Maintenance)["From basic screen, press Cancel button once.","Press and hold Cancel button for 4 seconds or more…
  • Service Setting Mode (BRC1D71)["Enter Field Setting Mode by pressing INSPECTION/TEST button for 4 seconds or more.","Press…
  • Wireless Remote Controller Field Setting["Press and hold the button for 4 seconds or more to enter field setting mode.","Select desired…

Full entry steps, exit procedures, and test sequences are available in Max.

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