Daikin EKHVWQ002AAV3 Installation Manual

Also see for EKHHS200AA1V3: Operation manual

Contents

Installation manual26 EKHVWQ002AAV3 + EKHHS200+260AA1V3Domestic hot water heat pump4PW65342-1A – 10.2010Symptom 4: The water pressure relief valve leaksSymptom 5: Dirty waterSymptom 6: The user interface displays "n" when pressingcertain buttonsSymptom 7: No water flow from hot tapsSymptom 8: Water from hot taps is coldSymptom 9: Intermittent water discharge13.4. Error codesWhen a safety device is activated, the user interface LED will beflashing, and an error code will be displayed.A list of all errors and corrective actions can be found in the tablebelow.Reset the safety by pushing the Y button.In case this procedure for resetting the safety is not successful,contact your local dealer.POSSIBLE CAUSES C ORRECTIVE ACTIONCold water inlet pressure. Check the pressure reducing valve.The field installed pressure reliefvalve is not functioning properly.Check for correct operation of thepressure relief valve by turning thered knob on the valve counterclockwise:• If you do not hear a clacking sound,contact your local dealer.• In case the water keeps running outof the unit, close both the water inletand outlet shut-off valves first andthen contact your local dealer.Dirt is blocking the water pressurerelief valve outlet.Check for correct operation of thepressure relief valve by turning thered knob on the valve counterclockwise:• If you do not hear a clacking sound,contact your local dealer.• In case the water keeps running outof the unit, close both the water inletand outlet shut-off valves first andthen contact your local dealer.POSSIBLE CAUSES C ORRECTIVE ACTIONDirty water Flush or clean the domestic hotwater tank after periods of standstill.It could occur that particles in thewater deposit on the bottom of thetank. If this deposit layer becomesthick enough it could enter the hotwater outlet and contaminate the hotwater.POSSIBLE CAUSES C ORRECTIVE ACTIONThe current permission level is set toa level that prevents using thepressed button.Change the "user permission level"field setting [0-00], see "Fieldsettings" in the operation manual.POSSIBLE CAUSES C ORRECTIVE ACTIONThe main water supply is off. Check that all shut off valves of thewater circuit are completely open.The strainer is blocked (eg. stainer ofhot water tap).Turn off the water supply, removeand clean the strainer.The field installed cold water inletpressure reducing valve is not fittedproperly.Check and refit as required.POSSIBLE CAUSES C ORRECTIVE ACTIONThe thermal cut-out located in thedomestic hot water tank module hasoperated• Check and find the cause of trippingand then reset button.• Check if the thermistor is correctlyinstalled in the thermistor socket ofthe heat pump module.Procedure: remove front panel andinsulation, replace or fix the sensor.The heat pump is not operating. Check the heat pump moduleoperation. Refer to the manualdelivered with the unit.If any faults are suspected, contactyour local dealer.POSSIBLE CAUSES C ORRECTIVE ACTIONThermal control failure (water will behot).Contact your local dealer.The field installed expansion vesselis broken.Replace the expansion vessel.Errorcode Failure cause Corrective action80 Inlet water temperaturethermistor failure (inlet waterthermistor broken)Contact your local dealer.81 Outlet water temperaturethermistor failure (outlet watertemperature sensor broken)Contact your local dealer.7E Scale accumulating error This is a first indication thatdescaling the unit will berequired. The unit however willcontinue to provide hot water.Contact your local dealer.7H Flow failure (water flow too lowor no water flow at all, minimumrequired water flow is 1 l/min)• Check that the unit is operatingwithin its operating range (referto "Disposal requirements" onpage 27).• Also refer to "Charging water" onpage 11.• Make sure there is no air in thesystem (purge air).• Check on the manometer thatthere is sufficient water pressure.The water pressure must be>1 bar (water is cold).• Make sure that the expansionvessel is not broken.• Check that the pump fuse (FU2)and PCB fuse (FU1) are notblown.• Descale the system.Contact your local dealer.• Check if pump speed selection isat position III.A1 PCB defective (A1P) Contact your local dealer.A5 Too high refrigerant temperature(measured by R4T)Contact your local dealer.AC Booster heater thermal protectoris openReset the thermal protector(refer to 5.2. "Overview of thedomestic hot water tank module"on page 4 for the location of thethermal protector).C4 Heat exchanger thermistorfailure (heat exchangertemperature sensor broken)Contact your local dealer.E1 PCB defective (A3P, A4P) Contact your local dealer.E5 Overload activation ofcompressorCheck that the unit is operatingwithin its operating range (referto "Disposal requirements" onpage 27).Contact your local dealer.E6 Compressor start up error Check that the unit is operatingwithin its operating range (referto "Disposal requirements" onpage 27).Contact your local dealer.E7 Fan lock failure (fan is locked) Check if the fan is not obstructedby dirt. If the fan is notobstructed, contact your localdealer.E8 Too high input current error Contact your local dealer.EC Domestic hot water temperaturetoo high (>80°C)• Check that the contactor of theelectric booster heater is notshort circuited.• Check that the domestic hotwater thermistor is giving thecorrect read out.F3 Too high discharge temperature Contact your local dealer.H0 Compressor system sensorabnormalityContact your local dealer.H6 Position sensor abnormality Contact your local dealer.

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