Friedrich 2007 service manual Introduction, Typical Unit Components

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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).

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

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).

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Contents 2007 Table of Contents Typical Unit Components IntroductionRoom AIR Conditioners Limited Warranty Routine Maintenance Unit Identification 08 L 1Performancedata Receptacle Electrical DataElectronic Controls Functional Component DefinitionsTesting the Electronic Control Error Code Listings Testing the Electronic Control XQ/WS Boards & QME BoardsSealed Refrigeration System Repairs Refrigeration System Sequence of OperationEquipment Required Hermetic Component ReplacementSpecialprocedureinthecaseofcompressor Motor Burnout Rotarycompressorspecialtroubleshooting and ServiceMethod of Charging Refrigerant ChargingOvercharged Refrigerant Systems Undercharged Refrigerant SystemsRestricted Refrigerant System Malfunction of Valve Normal Function of ValveProblem Possible Cause Action Cooling only Room AIR Conditioners Troubleshooting TipsReplace fuse, reset breaker. If repeats, check To equalize before attempting to restart. Instruct Vents on applicable models are in the closed Heat / Cool Room AIR Conditioners Troubleshooting Tips Refrigerant System Diagnosis Heating Troubleshooting Chart CoolingYES Troubleshooting Chart HeatingElectrical Troubleshooting Chart Heat Pump System Cools When Heating is DesiredModels RM18L30-A, KM18L30-A, KM21L30-A, RM24L30-A, KM24L30-A SS16L30-A/B, SM18L30-A/B, SM21L30-A/B, SM24L30-A/B Model SL28L30-A SL36L30-B EQ08L11-A ES12L33-A, ES16L33-A, EM18L34-A, EM24L35-A EL36L35-A YS09L10-A, YS09L10-B YS13L33-A, YM18L34-A YL24L35-A RAC-Svc-07