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 assembly with a voltmeter. Con- nect the dispenser to the power source. The indi- cation 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.

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 wir- ing harness.

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

Temperature Control Flow Charts

tronic control assembly.

5.Check the voltage across terminals 1 & 4 of the electronic control assembly with a voltmeter. Con- nect the dispenser to the power source. The indi- cation 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 after a delay of approximately 5 seconds.

6.Disconnect the dispenser from the power source.

If voltage was present as described, the liquid level control of the system is operating properly, proceed to #7.

If voltage was not present as described, replace the electronic control assembly and the temperature sen- sor in the tank lid.

NOTE - Each electronic control assembly is calibrated to a temperature sensor. Both components MUST be replaced as a set.

H5X THERMOSTAT

PROBLEM: Water Not Hot Enough

H5E THERMOSTAT

PROBLEM: Water Not Hot Enough

Jumper JP1

No

 

Reposition Jumper

In Boil Position

 

?

 

 

 

 

Yes

 

 

Red Light On

No

Constantly

 

?

 

Turn Temperature

Adjustment Screw

Clockwise Contiuously

Red Light On

No

Constantly

 

?

 

 

Yes

 

 

 

 

 

 

Measure Voltage

 

At Tank Heater

 

 

 

Yes

Voltage Present

?

 

Replace Steam Sensor

Red Light On

Yes

 

Constantly

 

 

 

 

?

 

 

 

 

 

 

Recheck Water Temperature

No

Replace Control Assembly

Replace Tank Heater

 

Yes

 

 

 

 

Measure Voltage

 

At Tank Heater

 

 

 

Yes

Voltage Present

?

 

 

No

 

 

 

 

 

 

Red Light On

 

Yes

?

 

 

 

 

 

 

 

 

 

 

Adjust For Correct

 

No

Water Temperature

 

 

 

 

 

Replace Control Assembly

Replace Tank Heater

Limit Thermostat OK

No

Replace Limit Thermostat

 

?

 

 

 

No

 

 

 

 

Limit Thermostat OK

No

 

 

Replace Limit Thermostat

 

 

 

?

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

Replace Control Assembly

 

 

 

 

 

 

 

 

 

 

Measure Voltage

 

 

 

 

At Tank Heater

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace Triac

Voltage Present

No

 

 

 

 

 

Check For Split Tank Heater

 

 

 

?

 

 

 

 

 

 

 

Reinstall Original

 

 

 

 

 

 

Yes

 

 

 

Control Assembly

 

 

 

 

 

 

 

 

 

 

 

Recheck Water Temperature

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

Replace Control Assembly

 

 

 

 

 

 

 

 

Measure Voltage

 

 

 

At Tank Heater

 

 

 

 

 

 

 

 

 

 

 

 

Replace Triac

Voltage Present

No

 

 

 

Check For Split Tank Heater

 

 

?

 

 

 

 

 

 

 

Reinstall Original

 

Yes

 

 

Control Assembly

 

 

 

 

 

 

 

 

 

Recheck Water Temperature

 

 

 

 

 

 

 

 

11

10420 011599

 

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Bunn H5E H5X service manual Service Electronic Controls, Liquid Level Control Test Procedure
Page 10 Page 12

H5E H5X specifications

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