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Chiller
GBF-15
Service manual
desmon GBF-15 Service Manual
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
1 Basic Service Diagnostic (Standard Controller)
Alarm/Failure List
Failure Code Details
Service Menu - Configuration Parameter
Parameter List (Factory Setting)
Temperature Probes Display
2 Basic Service Diagnostic (Touch Screen Controller)
Alarm/Failure List
Failure Code Details
Service Menu - Configuration Parameters
Entering the Configuration Parameter
Parameter List (Factory Settings)
Temperature Probes Display
3 Troubleshooting
Probes
Checking the Probes
NTC (10Kohms@25°C/77°F) Diagram
NTC (10Kohms@25°C/77°F) Chart Table
Pt1000 (1Kohms@0°C/32°F) Diagram
Pt1000 (1Kohms@0°C/32°F) Chart Table
Door Switch
Checking the Door Switch
Pressure Switch
Pressure Switch Working Principles - Alarm Connection
Pressure Switch Working Principles - Pump down
Pressure Switch Factory Setting
Door Frame Heater
Heater Cable Features
Main Board - Standard Controller
Checking Relay Outputs
Keypad - Standard Controller
Keypad Troubleshooting
Main Board - Touch Screen Controller
Checking Relay Outputs
Display - Touch Screen Version
Touch Screen Display Troubleshooting
Refrigerant Pressures Checks
4 Service and Repair
Remove the Front Panel
Units from 5 to 18 Shelves
GBF-GN2/3 (Smallest Self-Contained Unit)
Latest Version of Self-Contained (5 to 18 Pans) Effective June 2014
Reversing the Door Swing (Only Non Touch Screen)
Accessing the Condensing Unit
Unit from 5 to 18 Shelves
Shelves Units
GBF-3GN2/3 (Smallest Self-Contained Unit)
Remote Units, Units GBF20GN2/1, GBF40GN2/1,GBF20GN1/1
How to Access Evaporator Assembly
Evaporator Assembly Description
Accessing the Evaporator
Replacing the Temperature Sensing Probes
Replacing the Evaporator Fan
Replacing the Door Switch
GBF-3GN2/3 (Smallest Self-Contained Unit)
Units from 5 up to 18 Shelves
Replacing the Pressure Switch
Replacing the Door Frame Heater
Replacing the Relay Board
Replacing the Keypad
5 Vacuum and Charge Procedure
Vacuum and Charging Instruction
Self Contained Models
Remote Models
Vacuum and Charging Recommendations
6 Schematics
Scheme of Components
Airflow Requirements
Self Contained - Airflow Requirements
Remote - Airflow Requirements
Connection of Remote Cabinet to "Non-Desmon" Condensing Unit
Connection with Existing Refrigerant Lines
Hook the Electrical Power to the Unit
How to Read the Model Number
Data Chart Table
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Basic Service Diagnostic (Standard Controller)
2
Alarm/Failure List
3
Service Menu - Configuration Parameter
4
Alarm/Failure List
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Table of Contents
Troubleshooting
TROUBLESHOOTING
47
KEYPAD - STANDARD CONTROLLER
58
DISPLAY - TOUCH SCREEN VERSION
62
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Summarization of Contents
Safety Precautions
General Safety Warnings
Covers critical safety instructions including electrical, installation, and general handling precautions.
Electrical LOCKOUT/TAGOUT Procedure
Procedure for safely disconnecting and tagging electrical circuits before service.
Repair Work Safety
Ensures repair work is performed by authorized personnel to prevent hazards.
Service Diagnostics
Standard Controller Diagnostics
Alarms, failure codes, service menu, and parameters for standard controllers.
Standard Controller Parameters
Details on accessing and modifying unit configuration settings for standard controllers.
Touch Screen Controller Diagnostics
Alarms, failure codes, service menu, and parameters for touch screen controllers.
Touch Screen Controller Parameters
Guide to accessing and adjusting settings on the touch screen controller.
HACCP Printer Functions
How to print alarm lists and cycle data using the HACCP printer.
Troubleshooting
Probe Issues
Information and troubleshooting for temperature sensing probes.
Switch and Heater Issues
Diagnosing and replacing door switches, pressure switches, and door frame heaters.
Board, Keypad, and Display Issues
Troubleshooting main boards, keypads, and touch screen displays.
Refrigerant Pressure Checks
Guidance on checking refrigerant pressures and related factors.
Service and Repair Procedures
Panel and Door Access
Procedures for removing front panels and reversing door swings.
Condensing and Evaporator Assembly Access
Steps to access the condensing unit and evaporator assembly.
Component Replacement
Detailed steps for replacing fans, probes, switches, heaters, boards, and keypads.
Vacuum and Charge Procedure
Steps for performing vacuum and charging procedures for refrigeration systems.
Schematics and Specifications
Schematics
Diagram illustrating the main components of the refrigeration system.
Airflow Requirements
Required clearances for proper airflow around units and condenser boxes.
Model Number and Data Chart
Guide to understanding model numbers and technical specifications.
Table of Contents
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