Friedrich 2003 service manual System Cools When Heating is Desired, Yes

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Troubleshooting Chart — Heating

REFRIGERANT SYSTEM

DIAGNOSIS – HEATING

Low Suction Pressure			High Suction Pressure			Low Head Pressure			High Head Pressure


Low Airflow			Outdoor Ambient Too High			Refrigerant System			Outdoor Ambient Too High
Low Airflow			for Operation in Heating			Refrigerant System			For Operation In Heating
Across Outdoor Coil			for Operation in Heating			Restriction




Refrigerant System			Reversing Valve not			Reversing Valve not			Low Airflow Across
Restriction			Fully Seated			Fully Seated			Indoor Coil


Undercharged			Overcharged			Undercharged			Overcharged


Moisture in System			Defective Compressor			Defective Compressor			Noncondensables (air) in
Moisture in System			Defective Compressor			Defective Compressor			System
									System

Electrical Troubleshooting Chart

(Heat Pump)

HEAT PUMP

SYSTEM COOLS WHEN

HEATING IS DESIRED.



	Is Line Voltage						Is the Selector Switch
	Present at the Solenoid			NO			Set for Heat?
		YES

	Is the Solenoid Coil Good?						Replace the Solenoid Coil
	Is the Solenoid Coil Good?			NO			Replace the Solenoid Coil
		YES		NO



	Reversing Valve Stuck


	Replace the Reversing Valve

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Contents 2003 Table of Contents 1st Digit Function RAC Serial Number Identification Guide00001 Page Data Evaporator AIR Operating Electrical Breaker Pressures Ratings Refrig Fuse Performance Evaporator AIR Operating Electrical Breaker Data SS10J10AR-A TEMP. DEG. F Pressures Ratings SC06H10E HeatingWY09A33F-A WY12A33F-A Heating BtuhAmps Refrigeration System Sequence of Operation Fuse/Circuit Wire SizeBreaker GroundingThermal Overload External Winding TestChecking Compressor Efficiency Terminal Overload Internal Terminal Overload TestChecking the Internal Overload FAN MotorResistor System Control Panel KQ Models Only- See Figure System Control PanelEQ Model Only See Figure System Control Panel YQ Model Only System Control Switch Test System Control Switch WE & WY Models See FigureSystem Control Panel See Figure System Control Switch KS, SS, KM, SM, SL Models See FigureHeat Pump & Electric Heat Models See Figure System Control SwitchTo Adjust Temperature To SET Mode of OperationTo Adjust FAN Speed Smart Center Electronic Control CenterTesting the Electronic Control To SET the TimerTesting the Electronic Control Error Code Listings To SET Hour ClockThermostat SQ & KQ Models See Figure TestThermostat YQ Model Only See Figure Thermostat Models ES, YS, EM, YM, EL, YL See FigureThermostat Adjustment Defrost Thermostat Heat Pump Models OnlyThermostat Bulb Location Defrost Bulb Location Heat Pump Models Only CAPACITOR, RUN See FigureCapacitor Test Heat Pumps Reversing Valve See Figure Check Valve OperationTesting Reversing Valve Solenoid Coil Heat Pump Models Only See FigureTo Test Heating Element See Figure VALVE, Drain PAN See FigureSealed Refrigeration System Repairs Equipment RequiredSpecial Procedure in the Case Compressor Motor Burnout Hermetic Component ReplacementRotary Compressor Special Troubleshooting and Service Equipment Must be CapableMethod of Charging Undercharged Refrigerant SystemsOvercharged Refrigerant Systems Restricted Refrigerant System Routine Maintenance Troubleshooting Touch Test Chart To Service Reversing Valves Problem To Correct Troubleshooting CoolingProblem Possible Cause To Correct Cycles Problem Possible Cause To Correct Troubleshooting Heating Heat pumps Problem Possible Cause To Correct Off and the electric element is energized Troubleshooting Heating Cooling/Electric Models Troubleshooting Chart Cooling YES System Cools When Heating is DesiredModels SQ06J10B-B, SQ06J10B-A, SQ08J10C-A, SQ08J10D-A Models KQ08J10B-1, KQ08J10B-A, KQ08J10C-A Schematic YQ06J10B-A ModelModel SC06H10D 619-405-06 Alternate SL28J30B-A, SL35J30-A, SL35J30-BConductor Or Brown RED Blue To Capacitor Bracket Wiring Diagram YS12J33-A, YM18J34B-A, YL24J35C-A Model EQ08J11-A, EQ08J11-B IDT Ovld Neutral WE09A33E-B, WE12A33E-A, WE15A33-A WY09A33F-A, WY12A33G-A Checking Room Temperature Testing The Electronic Control XQ Boards & QME BoardsFriedrich AIR Conditioning CO