Table of Contents |
|
Unit Identification | 3 |
Unit Specifications | 4 |
Unit Performance | |
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 | |
Thermostats (Indoor) | |
Thermostats (Defrost) | |
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 | |
Refrigerant Charging | |
Undercharged Refrigerant Systems | |
Overcharged Refrigerant Systems | 32 |
Restricted Refrigerant System | 33 |
Routine Maintenance | 34 |
Troubleshooting | |
Wiring Diagrams |
|
"RS", "RM", ................................................... 46 | |
"SQ" | 47 |
"KQ" | |
"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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