Table Of Contents - Friedrich KUHL R-410A Service Manual

Table Of Contents

Important Safety Information ..................................................................................................................................... 2-4
Introduction ................................................................................................................................................................... 5
Model and Serial Number Location .............................................................................................................................. 5
Unit Identifi cation .......................................................................................................................................................... 6
Performance Data and Specifi cations .......................................................................................................................... 7
Installation Information/Sleeve Dimensions/Circuit Rating ........................................................................................... 8
Electrical Data ............................................................................................................................................................... 9
Before Operating the Unit ............................................................................................................................................10
Control Panel Operation ..............................................................................................................................................11
Alerts ......................................................................................................................................................................12-14
Remote Control Operation ......................................................................................................................................15-16
Electronic Control System Maintenance Operation .................................................................................................17-20
Unit Operation .............................................................................................................................................................. 21
Cool-Heat Set Points .................................................................................................................................................. 22
Electronic Control Sequence of Operation ............................................................................................................ 23-29
Unit Operation with a Wall-Stat ................................................................................................................................... 29
Removing the Front Cover and Unit Chassis ................................................................................................................ 30
Replacing the ID Coil Thermistor ................................................................................................................................ 31
Replacing the Control Board ....................................................................................................................................... 31
Low Voltage Interface Connector ................................................................................................................................ 32
Replacing the ID Coil Thermistor ................................................................................................................................ 31
Remote Wall Thermostat ....................................................................................................................................... 32-33
Airfl ow Selection and Adjustment ............................................................................................................................... 33
Components Testing .............................................................................................................................................. 34-35
Refrigeration Sequence of Operation .................................................................................................................... 36-37
Sealed Refrigeration System Repairs ................................................................................................................... 38-41
Hermetics Components Check ................................................................................................................................... 42
Reversing Valve Description/Operation ...................................................................................................................... 43
Testing the Coil ........................................................................................................................................................... 44
Checking the Reversing Valve ............................................................................................................................... 44-45
Compressor Checks .............................................................................................................................................. 46-47
Compressor Replacement ..................................................................................................................................... 48-49
Routine Maintenance / Battery Check / Change ...................................................................................................... 50-53
Service and Assistance ............................................................................................................................................... 54
Performance Test Data Sheet and Sizing Guide .......................................................................................................... 55
Error Codes and Alarm Status .................................................................................................................................... 56
Troubleshooting ..................................................................................................................................................... 57-66
Electronic Control Board Components Identifi cation ................................................................................................... 67
Wiring Diagrams .................................................................................................................................................... 68-75
Thermistors' Resistance Values .................................................................................................................................. 76
Remote Control Replacement Instructions ........................................................................................................... 77-78
User Interface Service Kit ........................................................................................................................................... 79
Instructions for Using Cooling Load Estimate Form ................................................................................................... 80
Cooling Load Estimate Form ...................................................................................................................................... 81
Heat Load Form .................................................................................................................................................... 82-83
Warranty ..................................................................................................................................................................... 84
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