Bunn DV, H5X, H5E manual SERVICE cont Electronic Controls cont, J4 BLK & WHI to Temperature Sensor

SERVICE (cont.)

Electronic Controls (cont.)

If voltage was present as described, the temperature control of the system is operating properly.

If voltage was not present as described, contact Bunn-O-Matic to order an electronic control board and temperature sensor for evaluation and proceed to #9.

6.Replace the electronic control board.

7.Check the voltage across the tank heater terminals 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

8.Disconnect the dispenser from the power source.

If voltage was present as described, the temperature control of the system is operating properly. Return the new electronic control board or temperature sensor to Bunn-O-Matic for credit.

BLU to Tank

Heater

WHI/VIO to

Terminal Block

J3 PNK & GRY to

Heater Indicator

Refill Indicator

Power Indicator

Ready Indicator

T5 PNK to Liquid

Level Probe

T4 WHI or RED to

Terminal Block

T3 BLK to Overflow Safety Switch

T2 GRN or GRN/YEL to Chassis Ground

T1 WHI/BLU to

Solenoid

J5 GRY & GRY toTherm- istor (H5X only)

J4 BLK & WHI to

Temperature Sensor

Electronic Controls Removal and Replacement

1.Remove all wires from the electronic control board terminals.

2.Remove the six 6-32 screws holding the electronic control board to the component bracket.

3.Disconnect the temperature sensor, overflow tube temperature sensor, and indicator wires from the electronic control board.

4.Attach the temperature sensor, overflow tube temperature sensor, and indicator wires to the electronic control assembly.

5.Fasten the new electronic control board to its bracket.

6.Refer to Fig 2 when reconnecting the wires.

7.Review the initial set-up procedures on page 6.

FIG. 11a WIRING CONNECTIONS

Adjustments

The H5X/H10X dispensers hold the water tempera- ture at the threshold of boiling. It is not adjustable by the user.

The H5E dispenser is factory calibrated for the temperature specified on the data plate. If adjustment is required, use the following procedure:

1.Fill the dispenser according to the steps in the Initial Set-up.

2.Take the temperature of the stream of water im- mediately below the faucet as it flows from the dispenser with an accurate thermometer. Do not take the temperature of water collected in a con- tainer.

3.If any adjustment is required, refer to LEVEL 1 PROGRAMMING in the Operating Manual.

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