Andrews Fastflo WHC56 Wartungshandbuch

Working towards a cleaner futureFASTflo WHC56Service Manual March 2010

– 9 –• When a high temperature is set, the readout on the right isshown.• Please check the temperature displayed before using any hotwater.Be especial

– 10 –SequenceWater heatingOperationNOSafety device triggeredFlow is adjusted than settingoutlet water temp. less(1μA or more)abnormality Flame rod ci

– 11 –Total water flow (L/min.)Approx. 1.6 x 25K >+ water inlet temperature (°C)Set temperatureKIf the inlet temp is less than 50°C58°CSet temp + 1

– 13 –– 12 –Wiring Diagram and Inspection FlowchartFRDUDGND<CN1>BK BL2930COLOR CODINGBKWIGNITERWWWWIGFMTHERMAL FUSELSSMSMLSRR(VCC)BR(Vs)R(Vcc)BL

– 14 –Error Codes and CheckpointsDescriptionIgnition Failure(Initial Flame Faultdetection)Flame Rod Does NotDetect Flame (SecondaryFlame Fault Detecti

– 15 –Error Descriptions and How to ResetClosed circuit (no open or short)Connector No.CN-89 1Normal ValueNormal ValueClosed circuitDC14 – 16VDC14 –

– 16 –10kHz – 100kHzDC0.5µA or less BL-Burner caseBL-Electrode 11Normal ValueAC90V – 110VDC80V – 100VDC80V – 100VDC0.3V – 15V 2774 W-BKW-BLBK-BLR-BL 5

– 17 –Normal ValueDC7V – 48VDC10V – 14V150Hz – 400Hz(4 pulse/rev.) 222 BR-BLR-BLY-BL4135. Fan does not begin rotating, or the fan rotation is abnormal

– 18 –Main Remote Control(RC-7508M) Displaying the Maintenance MonitorDisplaySet ButtonSpeakerPower On/Off Button / LampSelection ButtonThe Pow

– 19 –Maintenance Monitor List10 times1 hourX 114151820*2*1 Heat Exchanger Flow Rate X 0.1L/min.0.1 L/min.0.1 L/min.L/min.X 0.1Number of Ignition Time

March 2010WHC56Service Manual•This manual must be read by Service personnel re-pairing the above appliance models.•Ta ke this manual

– 20 –Circuit Board Replacement[ RC-7508M ]It is necessary to transfer data when replacing a circuit board. Vital information about the water heater

– 21 –Drain Trap ReplacementPin clipRearDangerReplace the Drain trap following the procedures below.1. Disconnect electrical power to the unit. 2. Dra

– 22 –Themal Fuse ReplacementFan Motor ReplacementBACCircuit Board SettingsCircuit BoardUPWhen changing the fan motor.When Bell-mouth(B) is installed

– 23 –Anti Frost Heater Replacement Attention in after-sale servicePlease check the original position and re-install to this position.The anti-frost h

– 24 –Manifold Gas Pressure AdjustmentMaximum and Minimum Burner Setting PressureModel NamePlease check the Gas Category on the Data Label, before set

– 25 –2. Is the current leakage safety device normal?1. Is the current leakage safety device activated?A. Unit does not work at all (operation lamp do

– 26 –5. Remote control error.6. Circuit board error.Check the voltage of the remote control terminalblock.(1) Measure the voltage of the terminal blo

– 27 –1. Water flow sensor error.Check the water flow sensor.•Check using maintenance information monitor no. 15.Test when hot-water supply valve is f

– 28 –(2) Measure the voltage between Red 1 and Blue7 of connector 75 on the circuit board.3. Water inlet thermistor error.(1) Measure the resistance

– 29 –6. Igniter error.If error display 11 appears and there is no continuouselectrical discharge, then check the igniter.(1) Open the hot-water suppl

– 2 –Cold waterCold waterGasGasHot waterHot waterCondensateCombustion gasAbout 200°CAbout 200°CExhaust ExhaustAbout 50°CConventional type Condensing G

– 30 –If error display 61 appears and the fan is rotating,then check the fan speed sensor.(1) Measure the pulses between Yellow 3 and Red 4 of con

– 31 –(2) Measure the current between flame rod (or Blue1 of connector 78) and electrode.NormalDC 1µA or higher (during flamedetection)YesCheck for co

– 32 –2. Water outlet thermistor error.Check the water outlet thermistor.• Check to see whether the actual hot-watertemperature and displayed data of

– 33 –4. Gas solenoid valve error.Check the gas solenoid valves.(1) Measure the voltage using connector 10 on thecircuit board.NormalHot water is not

– 34 –6. Bypass flow control valve error.Check the bypass flow control valve.(1) Measure the following voltages usingconnector 38 on the circuit board

– 35 –(2) Disassembly of each part(2) Remove the quick fastener (A) in the rightfigure and pull the bypass servo (B).BA(3) Unscrew two fixing screws (

– 36 –2. How to remove the board(1) Unscrew two screws (A and B) that fix theboard and the earth screw (C) and removethe board.ABC3. How to remove the

– 37 –InstallationFilling the drain trap unit with waterThe drain trap unit can be filled before connecting the vent pipe.Filling the drain trap unit

– 38 –SpecificationsItemGasConsumption (NET)Hot Water CapacityCapacity RangeTemperature Settings12H13P25°C Rise50°C Rise32 L/min. 16 L/min.2.5 - 42

– 39 –WHC56 < mm >204455GAS INLET56232150464615AIR INLET1307824010586450(POWER CORD)GAS INLET130794066536701001401703670100140170

– 3 –Structural Cross-section of Operation Unit< WHC56, LWHC56>Flue collarAir inletIgnition electrodePCBGas inletFlame rodIgniterFrost sensing s

Baxi Commercial DivisionWood Lane, Erdington, Birmingham B24 9QP Email: [email protected]:0845 070 1056Technical

– 4 –Principle of OperationPCBImpellerGasAir SupplyFlame RodIgnition ElectrodeIgniterHigh-Limit SwitchHigh-Limit SwitchExhaustAnti-Frost HeaterFrost S

– 5 – Explanation of operation1.Using hot water(1) Turn the ON/OFF button on the remote controller to ON.(The ON/OFF button willturn on the light.)

– 6 –Main Remote Controller (RC-7508M) Part number B285DisplaySet ButtonSpeakerPower On/Off Button / LampSelection ButtonOperation Pan

– 7 –Before the first use of your water heater, make the following preparations.Follow steps 1 through 4.1Open the water supply valve.Open a hot water

– 8 –Setting Hot Water TemperatureOn this Display Operation Description12Use the buttonsto adjust thetemperature.Press theON/OFF buttonto turn it