Independent technical reference
Daikin
222 published entries
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Equipment covered
Documented codes
Air-to-water heat pump 31
U8-01Daikin Altherma 4 H F U8-01: Connection with LAN adapter lostHigh· Heat pumpsU8-02Daikin Altherma 4 H F U8-02: Connection with room thermostat lostHigh· Heat pumpsU8-03Daikin Altherma 4 H F U8-03: No connection with room thermostatHigh· Heat pumpsU8-07Daikin Altherma 4 H F U8-07: P1P2 communication errorHigh· Heat pumpsU8-11Daikin Altherma 4 H F U8-11: Connection with the Wireless gateway lostHigh· Heat pumpsU8-26Daikin Altherma 4 H F U8-26: Room thermostat software version compatibility errorHigh· Heat pumpsU8-27Daikin Altherma 4 H F U8-27: Connection with multistep backup heater PCB lostHigh· Heat pumpsUA05Daikin Altherma 4 H F UA-05: Indoor/outdoor combination abnormalityHigh· Heat pumpsUA07Daikin Altherma 4 H F UA-07: Indoor/outdoor combination abnormalityHigh· Heat pumpsUA09Daikin Altherma 4 H F UA-09: Indoor/outdoor combination abnormalityHigh· Heat pumpsUF01Daikin Altherma 4 H F UF-01: Indoor/outdoor miswiring detectionHigh· Heat pumpsUF02Daikin Altherma 4 H F UF-02: Reversed piping or bad communication wiring detectionHigh· Heat pumpsUH17Daikin Altherma 4 H F UH-17: Indoor unit locked (R290)High· Heat pumpsUH18Daikin Altherma 4 H F UH-18: Outdoor unit locked (R290)High· Heat pumps7H-12Daikin Altherma 4 H F 7H-12: Main zone pump blocked abnormalityMedium· Heat pumps7H-13Daikin Altherma 4 H F 7H-13: Main zone pump electrical fault abnormalityMedium· Heat pumps7H-14Daikin Altherma 4 H F 7H-14: Add. zone pump communication errorMedium· Heat pumps7H-15Daikin Altherma 4 H F 7H-15: Add. zone pump blocked abnormalityMedium· Heat pumps7H-16Daikin Altherma 4 H F 7H-16: Add. zone pump electrical fault abnormalityMedium· Heat pumps7H-17Daikin Altherma 4 H F 7H-17: Main zone pump communication errorMedium· Heat pumps7H-18Daikin Altherma 4 H F 7H-18: Water flow requirement problem at space cooling requestMedium· Heat pumps7H-19Daikin Altherma 4 H F 7H-19: Water flow requirement problem at tank heat-up requestMedium· Heat pumps7H-20Daikin Altherma 4 H F 7H-20: Water flow requirement problem on emitter hydraulic circuitMedium· Heat pumps7H-21Daikin Altherma 4 H F 7H-21: Water flow requirement problem on tank hydraulic circuitMedium· Heat pumps7H-22Daikin Altherma 4 H F 7H-22: Water flow requirement problem at space heating requestMedium· Heat pumps80-03Daikin Altherma 4 H F 80-03: main zone water sensor faultMedium· Heat pumps80-04Daikin Altherma 4 H F 80-04: Entering water temperature thermistor add. zone abnormalityMedium· Heat pumps81-06Daikin Altherma 4 H F 81-06: indoor R1T water sensor faultMedium· Heat pumps81-07Daikin Altherma 4 H F 81-07: tank valve water sensor faultMedium· Heat pumps8C-03Daikin Altherma 4 H F 8C-03: Undercooling of the space cooling water circuitMedium· Heat pumps8C-04Daikin Altherma 4 H F 8C-04: Undercooling of the main zone water circuitMedium· Heat pumps
Air conditioner 17
A1Daikin room AC A1: indoor control-board abnormalityHigh· HVACA3Daikin room AC A3: drain-level control abnormalityHigh· HVACA5Daikin room AC A5: high-pressure peak or freeze-protection eventHigh· HVACA6Daikin room AC A6: indoor fan-motor abnormalityHigh· HVACC4Daikin room AC C4: heat-exchanger temperature-sensor problemHigh· HVACC9Daikin room AC C9: room-temperature thermistor abnormalityHigh· HVACE1Daikin room AC E1: outdoor control-board defectHigh· HVACE3Daikin E3 on an air conditioner: high pressure switch trippedHigh· HVACE5Daikin room AC E5: inverter-compressor motor overheatHigh· HVACE6Daikin room AC E6: compressor startup defectHigh· HVACE7Daikin room AC E7: outdoor fan-motor malfunctionHigh· HVACF3Daikin room AC F3: discharge-pipe temperature malfunctionHigh· HVACL4Daikin room AC L4: inverter heat-sink temperature riseHigh· HVACL5Daikin room AC L5: inverter instantaneous overcurrentHigh· HVACU0Daikin room AC U0: outdoor-unit refrigerant shortageHigh· HVACU2Daikin room AC U2: outdoor-unit supply-voltage defectHigh· HVACU4Daikin room AC U4: indoor/outdoor communication problemHigh· HVAC