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

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

Warning: Ensure the device is unplugged before starting the procedure

All wires removed from the electronic control board terminals

Six 6-32 screws removed from the electronic control board

Temperature sensor, overflow tube temperature sensor, and indicator wires disconnected from the electronic control board

Temperature sensor, overflow tube temperature sensor, and indicator wires attached to the new electronic control assembly

New electronic control board fastened to its bracket

Upload a photo of the reconnected wires as per Fig 2

Review the initial set-up procedures on page 6

Sign off on the electronic control replacement

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

Voltage across terminals 3 & 4 of the electronic control circuit board

Voltage across the tank heater terminals

Was voltage present as described?

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

Replace the electronic control board

Voltage across the tank heater terminals after replacing the electronic control board