Tripp Lite SRCOOL33K, Service Manual

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Table of Contents
1. Specifications 3
2. Unit Dimensions 4
3. LCD Control Panel 5
4. Refrigerant Cycle Diagram 6
5. PCB and Wiring Diagrams 7
5.1 Circuit Diagram 7
5.2 PCBA Diagrams 8
5.2.1 Power PCBA 8
5.2.1.1 Power PCBA Schematic 8
5.2.1.2 Power PCBA Critical 9
Components Layout
5.2.1.3 Power PCBA Gerber Layout 10
5.2.2 Display and Control PCBA 11
5.2.2.1 Display and Control 11
PCBA Schematic
5.2.2.2 Display and Control 12
PCBA LCD and Buttons Layout
5.2.2.3 Display and Control 12
PCBA Gerber Layout
5.2.3 Translator PCBA 13
5.2.3.1 Translator PCBA Schematic 13
5.2.3.2 Translator PCBA Gerber Layout 14
6. Unit Disassembly 15
6.1 Removing Side Panels 15
6.2 Opening the Door 15
6.3 PCB Cover Removal 16
7. Exploded Diagram and BOM 17
8. Electronic Function 21
8.1. Main Features 21
8.2 General Controller Technical Specifications 21
8.3 Sensor Definitions 21
8.4 Main Control Functions 22
8.4.1 Energy Saving Mode 22
8.4.2 Normal Mode 23
8.5 Fan Speed Switching (Evaporator) 24
8.6 Other Controls (Self-Evaporating Motors 24
and Water Pumps)
8.7 Internal Timers 24
8.8 Protection Controls 24
8.8.1 Compressor Delay Protection 24
8.8.2 Defrost Protection 24
8.8.3 Other Protection Controls 24
8.9 Memory Function 25
8.10 UART/RS232 Communication 25
8.11 Factory Defaults 25
8.12 Unit Defaults During Power Up 25
After Power Loss
9. Basic Test Procedure 26
9.1 Defective Compressor 26
9.1.1 Compressor Wiring Test 26
9.1.2 Ground Test 26
9.1.3 Checking Compressor Efficiency 26
9.1.4 Compressor Thermal Overload (Internal) 27
9.1.5 Testing the Internal Overload for Failure 27
9.2 Sealed Refrigeration System Repairs 27
9.2.1 Equipment Required for 27
Refrigeration System Repairs
9.2.2 Equipment Requirements 27
9.2.3 Compressor Replacement 28
9.2.4 Special Procedure in the Event of 28
Compressor Motor Burnout
9.2.5 Refrigerant Charge 29
9.3 Fan Motor 29
9.3.1 Fan Motor Test 29
9.4 Capacitor 30
9.4.1 Capacitor Test 30
10. Temperature Sensor Table 31
11. Troubleshooting 32
11.1 Troubleshooting Table 32
11.2 Troubleshooting Flowcharts 34
11.2.1 General Troubleshooting Flowchart 34
11.2.2 Electrical System Troubleshooting 35
Flowchart
Español 36