Bunn Hot Water Dispencer H5E-40-240

Warning: Disconnect the dispenser from the power source before starting the test

Disconnected the dispenser from the power source

Remove the black wire at the limit thermostat coming from the terminal block

Black wire removed from the limit thermostat

Voltage across the black wire and the white or red wire of the terminal block

If voltage was not present as described, check the dispenser wiring harness

Voltage was present as described

Reconnect the black wire and proceed to next step

Disconnect the dispenser from the power source

Remove the top cover (3 screws) and front shroud assembly (4 screws)

Remove the top 2 screws and loosen 2 lower screws securing control panel to shroud

Disconnect switch wires from the CBA

Remove the large nut securing the switch

Installation in the reverse order

Sign off on the switch replacement

Warning: Disconnect the dispenser from the power source before starting the test

Voltage across the black wire on the thermostat and the white or red wire at the terminal block checked

If voltage is not as described, refer to the Wiring Schematics and check the dispenser wiring harness

Voltage across the blue/black wire on the thermostat and the white or red wire at the terminal block checked when the thermostat is turned 'ON'

Voltage not indicated when the thermostat is turned 'OFF'

If voltage is not as described, replace the thermostat

Sign off on the thermostat test

Check the valve for coil action

If no sound is heard, proceed to next step

Check for blockage in the valve

Connect voltmeter leads to the coil terminals

If voltage is present but no coil action is observed, valve is defective

Check the dispenser wiring harness

Check the control board for proper operation

Disconnect the dispenser from the power source and allow to cool

Warning: Disconnect the dispenser from the power source before starting the test

Disconnect the black wire from the contactor coil to the limit thermostat and black wire from the red wire on the main harness on two wire 240V models

Voltage across the red wire and black wire

If voltage is not as described, check the wiring harness

Check for continuity between the left and right terminals on the contactor coil

If continuity is not as described, replace the contactor

Voltage across the upper left terminal and the upper right terminal on the contactor