Bunn H5X, H5E, DV service manual Service Electronic Controls, Liquid Level Control Test Procedure

Page 9

SERVICE (cont.)

Electronic Controls (cont.)

Liquid Level Control Test Procedure

1.Disconnect the dispenser from the power source.

2.Check the voltage across terminals 3 & 4 of the electronic control board with a voltmeter. Connect the dispenser to the power source. The indication must be:

a.) 100 to 120 volts ac for 100 to 120 volt models or

b.) 200 to 240 volts ac for 200 to 240 volt models or

c.) 230 volts ac for 230 volt models.

3.Disconnect the dispenser from the power source. If voltage was present as described, proceed to #4. If voltage was not present as described, refer to the Wiring Diagrams and check the dispenser wiring harness.

Temperature Control Flow Charts

4.Remove the pink wire from terminal 5 of the elec- tronic control assembly.

5.Check the voltage across terminals 1 & 4 of the electronic control board with a voltmeter. Connect the dispenser to the power source. The indication must be:

a.) 100 to 120 volts ac for 100 to 120 voltmodels or

b.) 200 to 240 volts ac for 200 to 240 volt models or

c.) 230 volts ac for 230 volt models after a delay of approximately 5 seconds.

6.Disconnect the dispenser from the power source.

If voltage was present as described, the liquid level con- trol of the system is operating properly, proceed to #7. If voltage was not present as described, replace the electronic control board and the temperature sensor in the tank lid.

SERVICE (cont.)

9

42311 071310

 

Image 9 Contents
Phone 217 529-6601 FAX 217 H10X/H5X H5E/DV PC H5 ElementBUNN-O-MATIC Commercial Product Warranty Contents Problem Fault CodesFlashes Description of Failure Remedy Problem Probable Cause Remedy Noises Water supply Ready indicator will not light Water boils continuously Temperature controlLime build-up Deposits. Delime as requiredComponent Access H10X Component Access H5E/DV-PC/XLiquid Level Control Flow Charts ServiceElectronic Controls LocationService Electronic Controls Liquid Level Control Test ProcedureService H5X Thermostat Replace the electronic control board Location Limit thermostat is located on the tank lid Service Limit ThermostatSafety Overflow Wiring Service Safety Overflow SwitchIf voltage was present as described, proceed to #5 Service Solenoid Valve Late ModelsService Solenoid Valve Early Models Service Tank Heater Location Tank heater is located in the tank lidCheck for continuity across the tank heater termi- nals Thermistor Position Service Steam Sensor ThermistorTest Procedures Service Dispense Valve PC OnlyRemoval and Replacement Location Dispense Valve is located behind control panel120V AC 2 Wire + GND 120/208V AC 3 Wire + GND Early H5E, H5X, H10X Install jumper thru ver120/240V AC 3 Wire + GND Single PhaseSchematic Wiring Diagram H5E-PC 230V AC 2 Wire + GNDH5-PC Schematic Wiring DiagramWire + GND Schematic Wiring Diagram H5E/H5X Relay Schematic Wiring Diagram H5XA, H5EA CESingle Phase Schematic Wiring Diagram H5 Element
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