
2 2
TABLE OF CONTENTS 2
INTRODUCTION 4
Important Safety Information 4
Personal Injury Or Death Hazards 6
Model Number Reference Guide 8
Serial Number Reference Guide 8
Model And Serial Number Location 9
Component Identification- Wallmaster 11
SPECIFICATIONS 12
Dimensions 13
Electrical Data 14
Electrical Data -Power Cord 15
OPERATION 16
Airflow Selection and Adjustment -Kuhl 16
Airflow Selection and Adjustment -Kuhl Q 17
Airflow Selection and Adjustment -Wallmaster 18
User Interface-Kuhl 19
User Interface - Kuhl Q 20
User Interface- Wallmaster 21
User Interface - All Models 22
Control Panel 33
Remote Control 34
Unit 35
Unit Cooling Mode 36
General Knowledge Sequence Of Refrigeration 40
Routine Maintenance 41
Remove and Install Front Cover -Kuhl 41
Remove and Install Front Cover -Kuhl Q 42
Remove and Install Front Cover -Wallmaster 43
Cord Routing Change-Kuhl 44
Cord Routing Change-Kuhl Q 46
Standard Filter Removal / Installation Instructions - Kuhl 49
Premium Carbon Filter Removal / Installation Instructions -Kuhl 50
Filter Removal / Installation Instructions - Kuhl Q 51
REMOVE AND INSTALL THE CHASSIS 52
Remove The Chassis - Kuhl 52
Install The Chassis -Kuhl 53
Kuhl Q 54
Wallmaster 55
DISASSEMBLY 56
Kuhl-Open Electrical Box (To access Power Cord and fixed orifice) 56
Replace the Main PCB (Kuhl) 57
Replace the User Interface 57
Replace the Main PCB (Kuhl Q) 58
Replace the User Interface (Kuhl Q) 58
Replace the Main PCB (Wallmaster) 59
Replace the User Interface (Wallmaster) 59
Replace the Electronic Control Board - Wallmaster 60
TROUBLESHOOTING 61
Room Air Conditioner Unit Performance Test Data Sheet 61
Cooling Sizing Guide 61
Diagnostic Codes 62
Diagnostic Codes-Inverter 64
Basic Troubleshooting 67
For loss of compressor motor control, compressor startup faults, and compressor phase overcurrent 70
Compressor Module Over Current 71
COMPONENT TESTING 72
Reversing Valve 72
Checking the Reversing Valve 72
Checking The Reversing Valve Solenoid 72
Compressor Checks 73
Fan Motor 74
Heating Element 75
Drain Pan Valve 75
Thermistors Description 76
R-32 SEALED SYSTEM REPAIR 77
General Information 77
Required Equipment 79
TABLE OF CONTENTS