2 PB
Table of Contents
INTRODUCTION 3
Important Safety Information 3
Personal Injury Or Death Hazards 4
Personal Injury Or Death Hazards 5
New Wallmaster Control Options 6
Model and Serial Number Location 7
Model Number Reference Guide 8
Serial Number Reference Guide 9
SPECIFICATIONS 10
Refrigeration Systems Performance Data 10
Electrical Data 12
OPERATION 14
Airow Adjustment 14
User Interface 15
Control Panel 27
OPERATION 28
Remote Control 28
Unit 29
Unit Cooling Mode 30
General Knowledge Sequence Of Refrigeration 34
ROUTINE MAINTENANCE 35
Remove And Install The Front Cover and Filter 35
REMOVE AND INSTALL THE CHASSIS 37
TROUBLESHOOTING 38
Cooling Sizing Guide 38
Diagnostic Codes 39
Troubleshooting Tips 40
COMPONENT TESTING 48
Capillary Tube and Check Valve Assy (Heat Pump Units) 48
Capillary Tube Assy (Cool Only Units) 49
Reversing Valve Description And Operation 50
Testing The Reversing Valve Solenoid Coil 51
Checking The Reversing Valve 52
Touch Test Chart : To Service Reversing Valves 53
Compressor Checks 54
Fan Motor 56
Capacitors 56
Heating Element 57
Drain Pan Valve 57
Testing the User Interface and Electronic Control Board 58
Thermistors Description 58
Electronic Control Board Identication 59
Replace the Electronic Control Board 60
Replace the User Interface 60
R-410A SEALED SYSTEM REPAIR 61
Refrigerant Charging 62
Undercharged Refrigerant Systems 63
Overcharged Refrigerant Systems 64
Restricted Refrigerant System 65
Sealed System Method of Charging/ Repairs 66
Compressor Replacement 67
Compressor Replacement -Special Procedure in Case of Compressor Burnout 68
Replace The Reversing Valve 69
WIRING DIAGRAMS 70
INTERACTIVE PARTS VIEWER 73
Available Accessories 74
APPENDIX 75
Appendix 1-Thermistor Resistence Values (This Table Applies to All Thermistors) 75
FRIEDRICH AUTHORIZED PARTS DEPOTS 77
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