Do you have a question about the Bunn ULTRA-2A and is the answer not in the manual?
Essential safety precautions to take before servicing the equipment.
Information on maintaining shaft seals and bushings for optimal operation.
Explanation of fault codes incorporated into the display for troubleshooting.
Description of the three main switches for operating the dispenser.
Description of the five main switches for operating the dispenser.
List of materials needed for the auto-fill cleaning procedure.
Step-by-step guide for sanitizing the auto-fill system.
Identifying common issues that lead to inaccurate torque sensor readings.
Inventory of parts included in the semi-annual preventive maintenance kit.
Step-by-step guide for performing semi-annual preventive maintenance.
Steps to diagnose and fix issues with the hopper hood lighting.
Diagnosing and resolving unusual noises from the dispenser's operation.
Troubleshooting guide for when the auger motor fails to rotate.
Diagnosing and resolving errors related to the torque sensor system.
Troubleshooting steps for temperature sensor faults and readings.
Information on accessing internal dispenser components by removing panels.
Identifying auger motor location and performing basic operational tests.
Detailed steps for removing and replacing auger motors.
Finding the auger motor capacitor and procedures for testing its function.
Steps for safely removing and installing the auger motor capacitor.
Identifying the auger shaft assembly location and initial removal steps.
Procedures for installing the auger shaft assembly with lubrication.
Finding the circuit breaker and performing continuity and reset tests.
Detailed steps for removing and replacing the circuit breaker unit.
Finding the compressor and outlining test procedures for its components.
Finding the compressor and outlining test procedures for its components.
Crucial safety guidelines for servicing refrigeration systems and compressors.
Procedures for testing compressor windings and related electrical components.
Testing and replacement of the external thermal protector for the compressor.
Checking the correct mounting position and continuity of the start relay.
Finding the compressor and outlining test procedures for its components.
Finding the compressor and outlining test procedures for its components.
Finding the relay/contactor and performing voltage and continuity tests.
Steps for removing and replacing the relay or contactor unit.
Finding the control board and testing its supply voltage and operation.
Procedures for removing and installing a new control board.
Using shipping supports to verify and adjust cooling drum alignment.
Finding the fan and performing voltage and continuity tests.
Detailed steps for removing and replacing the fan assembly.
Finding the fan and performing voltage and continuity tests.
Detailed steps for removing and replacing the fan assembly.
Finding the sensor and testing its voltage and resistance.
Performing an alternative resistance test on the hot gas temperature sensor.
Steps for removing and installing a new hot gas temperature sensor.
Finding the lamp cord assembly and testing its continuity.
Steps for removing and replacing the lamp cord assembly.
Finding the connector and testing for voltage and continuity.
Steps for removing and installing a new lamp cord connector.
Finding the assembly and testing lamp voltage and continuity.
Steps for removing and replacing the lamp holder/socket assembly.
Finding the LED lamps and testing voltage and continuity.
Steps for removing and replacing the LED circuit board assembly.
Testing the lamp relay coil for proper voltage and continuity.
Testing the lamp relay contacts for continuity in different modes.
Finding the switch and testing switch continuity using common pin.
Steps for removing and installing a new membrane switch on the panel.
Finding the switch and testing switch continuity using common pin.
Steps for removing and installing a new membrane switch on the panel.
Finding solenoids and testing voltage and coil continuity.
Steps for removing and installing solenoids, including refrigerant handling.
Finding the sensor and testing voltage and resistance readings.
Performing an alternative resistance test on the temperature sensor.
Steps for removing and installing a new temperature sensor.
Finding the board and testing its LED and phototransistor function.
Steps for removing and installing a new torque sensor circuit board.
Finding the transformer and testing output voltages.
Steps for removing and installing a new transformer unit.
Finding autofill valves and testing for proper voltage at solenoids.
Steps for removing and replacing autofill solenoid valves.
Finding autofill components and guidelines for proper Brix pump placement.
Testing solenoid valves for correct voltage output for water and syrup.
Steps for removing and replacing autofill solenoid valves.
Mapping of TRIACs and their control functions for the ULTRA-1 model.
Mapping of TRIACs and their control functions for the ULTRA-2 model.
Mapping of TRIACs controlling the liquid auto-fill system.