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Bunn ULTRA-2A User Manual

Bunn ULTRA-2A
73 pages
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ULTRA-1
ULTRA-2
SERVICE & REPAIR MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
41084.0000F 08/16 ©2009 Bunn-O-Matic Corporation
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Bunn ULTRA-2A Specifications

General IconGeneral
BrandBunn
ModelULTRA-2A
CategoryDispenser
LanguageEnglish

Summary

Commercial Product Warranty

User Notices

Site Preparation

Introduction to the Dispenser

Safety First

Essential safety precautions to take before servicing the equipment.

Basic Maintenance

Information on maintaining shaft seals and bushings for optimal operation.

Fault Codes

Explanation of fault codes incorporated into the display for troubleshooting.

Temp & Torque Screen

Operating Controls ULTRA-1

Control Panel Overview

Description of the three main switches for operating the dispenser.

Operating Controls ULTRA-2

Control Panel Overview

Description of the five main switches for operating the dispenser.

Auto-fill Cleaning Instructions

Materials Required

List of materials needed for the auto-fill cleaning procedure.

Sanitizing Procedure

Step-by-step guide for sanitizing the auto-fill system.

Preventive Maintenance

Causes of False Readings

Identifying common issues that lead to inaccurate torque sensor readings.

Required Regular Maintenance

Maintenance Kit Contents

Inventory of parts included in the semi-annual preventive maintenance kit.

Maintenance Instructions

Step-by-step guide for performing semi-annual preventive maintenance.

Troubleshooting - No Power

Troubleshooting - Chills But Won't Freeze

Troubleshooting - No Cooling

Troubleshooting - Freezing Issues

No Hood Lamps

Steps to diagnose and fix issues with the hopper hood lighting.

Troubleshooting - Operational Issues

Noise Issues

Diagnosing and resolving unusual noises from the dispenser's operation.

Auger Won't Turn

Troubleshooting guide for when the auger motor fails to rotate.

Troubleshooting - Sensor Errors

Torque Sensor Error

Diagnosing and resolving errors related to the torque sensor system.

Troubleshooting - Sensor Errors

Temperature Sensor Error

Troubleshooting steps for temperature sensor faults and readings.

Troubleshooting - Filter Messages

Service

Component Access Panels

Information on accessing internal dispenser components by removing panels.

Auger Motors

Location and Testing

Identifying auger motor location and performing basic operational tests.

Removal and Replacement

Detailed steps for removing and replacing auger motors.

Auger Motor Capacitor

Location and Testing

Finding the auger motor capacitor and procedures for testing its function.

Removal and Replacement

Steps for safely removing and installing the auger motor capacitor.

Auger Shaft Assembly

Location and Removal

Identifying the auger shaft assembly location and initial removal steps.

Installation and Lubrication

Procedures for installing the auger shaft assembly with lubrication.

Circuit Breaker

Location and Testing

Finding the circuit breaker and performing continuity and reset tests.

Removal and Replacement

Detailed steps for removing and replacing the circuit breaker unit.

Compressor (Americold)

Location and Test Procedures

Finding the compressor and outlining test procedures for its components.

Compressor (Embraco)

Location and Test Procedures

Finding the compressor and outlining test procedures for its components.

Compressor (Embraco) Safeguards

Important Safeguards

Crucial safety guidelines for servicing refrigeration systems and compressors.

Compressor (Embraco) Testing

Windings and Component Testing

Procedures for testing compressor windings and related electrical components.

Compressor (Embraco) Components

External Thermal Protector

Testing and replacement of the external thermal protector for the compressor.

Start Relay Mounting Position

Checking the correct mounting position and continuity of the start relay.

Compressor (Appliances)

Location and Test Procedures

Finding the compressor and outlining test procedures for its components.

Compressor (Danfoss)

Location and Test Procedures

Finding the compressor and outlining test procedures for its components.

Relay (or Contactor)

Location and Testing

Finding the relay/contactor and performing voltage and continuity tests.

Removal and Replacement

Steps for removing and replacing the relay or contactor unit.

Control Board

Location and Testing

Finding the control board and testing its supply voltage and operation.

Removal and Replacement

Procedures for removing and installing a new control board.

Cooling Drum Alignment

Alignment Check

Using shipping supports to verify and adjust cooling drum alignment.

Fan - ULTRA-2

Location and Testing

Finding the fan and performing voltage and continuity tests.

Removal and Replacement

Detailed steps for removing and replacing the fan assembly.

Fan - ULTRA-1

Location and Testing

Finding the fan and performing voltage and continuity tests.

Removal and Replacement

Detailed steps for removing and replacing the fan assembly.

Hot Gas Temperature Sensor

Location and Testing

Finding the sensor and testing its voltage and resistance.

Alternate Test

Performing an alternative resistance test on the hot gas temperature sensor.

Removal and Replacement

Steps for removing and installing a new hot gas temperature sensor.

Lamp Cord Assembly

Location and Testing

Finding the lamp cord assembly and testing its continuity.

Removal and Replacement

Steps for removing and replacing the lamp cord assembly.

Lamp Cord Connector

Location and Testing

Finding the connector and testing for voltage and continuity.

Removal and Replacement

Steps for removing and installing a new lamp cord connector.

Lamp Holder/Socket Assembly

Location and Testing

Finding the assembly and testing lamp voltage and continuity.

Removal and Replacement

Steps for removing and replacing the lamp holder/socket assembly.

LED Lamps

Location and Testing

Finding the LED lamps and testing voltage and continuity.

Removal and Replacement

Steps for removing and replacing the LED circuit board assembly.

Lamp Relay

Coil Testing

Testing the lamp relay coil for proper voltage and continuity.

Contact Testing

Testing the lamp relay contacts for continuity in different modes.

Membrane Switch (ULTRA-2)

Location and Testing

Finding the switch and testing switch continuity using common pin.

Removal and Replacement

Steps for removing and installing a new membrane switch on the panel.

Membrane Switch (ULTRA-1)

Location and Testing

Finding the switch and testing switch continuity using common pin.

Removal and Replacement

Steps for removing and installing a new membrane switch on the panel.

Solenoids

Location and Testing

Finding solenoids and testing voltage and coil continuity.

Removal and Replacement

Steps for removing and installing solenoids, including refrigerant handling.

Temperature Sensor

Location and Testing

Finding the sensor and testing voltage and resistance readings.

Alternate Test

Performing an alternative resistance test on the temperature sensor.

Removal and Replacement

Steps for removing and installing a new temperature sensor.

Torque Sensor Circuit Board

Location and Testing

Finding the board and testing its LED and phototransistor function.

Removal and Replacement

Steps for removing and installing a new torque sensor circuit board.

Transformer

Location and Testing

Finding the transformer and testing output voltages.

Removal and Replacement

Steps for removing and installing a new transformer unit.

Liquid Autofill System

Liquid Autofill System Details

Location and Testing

Finding autofill valves and testing for proper voltage at solenoids.

Removal and Replacement

Steps for removing and replacing autofill solenoid valves.

Liquid Autofill System Operations

Location and Installation

Finding autofill components and guidelines for proper Brix pump placement.

Test Procedure

Testing solenoid valves for correct voltage output for water and syrup.

Removal and Replacement

Steps for removing and replacing autofill solenoid valves.

Coolant Schematic ULTRA-1

Coolant Schematic ULTRA-2

Triac Map ULTRA-1

ULTRA-1 TRIACS

Mapping of TRIACs and their control functions for the ULTRA-1 model.

Triac Maps ULTRA-2

ULTRA-2 TRIACS

Mapping of TRIACs and their control functions for the ULTRA-2 model.

Liquid Auto-Fill TRIACS

Mapping of TRIACs controlling the liquid auto-fill system.

Input and Output Chart ULTRA-1

Schematic Wiring Diagram ULTRA-1

Input and Output Chart ULTRA-2

Schematic Wiring Diagram ULTRA-2 AF

Schematic Wiring Diagram ULTRA-2B AF

Schematic Wiring Diagram PAFP

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