Friedrich 2003 service manual Table of Contents, Typical Unit Components, Introduction

Table of Contents
Unit Identification	3
Unit Specifications	4
Unit Performance	5-11
Refrigeration Sequence of Operation	12
Electrical Rating Tables	13
Compressor	14
Thermal Overload (External)	14
Thermal Overload (Internal)	15
Fan Motor	15
System Switches/Controls	15-24
Thermostats (Indoor)	24-25
Thermostats (Defrost)	25-26
Resistor (Heat Anticipator)	26
Capacitor, Run	26
Check Valve	27
Heat Pump Reversing Valve	27
Solenoid Coil (Heat Pump Models)	28
Valve, Drain Pan	29
Heating Element	29
Sealed Refrigeration Repairs	29-30
Refrigerant Charging	30-31
Undercharged Refrigerant Systems	31-32
Overcharged Refrigerant Systems	32
Restricted Refrigerant System	33
Routine Maintenance	34
Troubleshooting	34-45
Wiring Diagrams
"RS", "RM", ................................................... 46
"SQ"	47
"KQ"	48-49
"XQ"	50
"YQ"	51
"SC"	52
"SS", "SM"	53
"SL"	54
"KS", "KM", "KL"	55
"ES", "EM", "EL", "EK"	56
"YS13", "YM", "YL"	57
"YS09"	58
"EQ"	59
"WS"	60
"WE"	61
"WY"	62
Testing XQ and QME Boards	63

Typical Unit Components

Fresh Air	Compressor
Capillary Tube	Liquid Filter Driers
Reversing Valve	Condenser Coil
(some models)
Front Cover	Discharge Air
System Switches	Outdoor Grille
Evaporator Coil	Sleeve
Return Air Grille/Filter
Blower Wheel
Blower Motor	Condenser Fan Blade
	Basepan

Introduction

This service manual is designed to be used in conjunction with the installation manuals provided with each air conditioning system component.

This service manual was written to assist the professional RAC service technician to quickly and accurately diagnose and repair malfunctions.

This manual will deal with subjects in a general nature. (i.e. all text will not pertain to all models).

IMPORTANT: It will be necessary for you to accurately identify the unit you are servicing, so you can be certain of a proper diagnosis and repair. (See Unit Identification.)

The information contained in this manual is intended for use by a qualified service technician who is familiar with the safety procedures required in installation and repair, and who is equipped with the proper tools and test instruments.

Installation or repairs made by unqualified persons can result in hazards subjecting the unqualified person making such repairs to the risk of injury or electrical shock which can be serious or even fatal not only to them, but also to persons being served by the equipment.

If you install or perform service on equipment, you must assume responsibility for any bodily injury or property damage which may result to you or others. Friedrich Air Conditioning Company will not be responsible for any injury or property damage arising from improper installation, service, and/or service procedures.

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