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Friedrich racservmn Troubleshooting Chart — Heating, Electrical Troubleshooting Chart Heat Pump

Models: racservmn

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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

Page 45

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Friedrich racservmn service manual Troubleshooting Chart — Heating, Electrical Troubleshooting Chart Heat Pump

Contents

Room Air Conditioners Service Manual2003 Table of Contents Typical Unit ComponentsIntroduction 2nd Digit S S 08 J 1 0 R3rd and 4th Digit - Approximate BTU/HR Cooling 8th Digit – EngineeringPage EQ PERFORMANCE DATA RS-RMPERFORMANCE DATA PERFORMANCE SS PERFORMANCE DATA WS PERFORMANCE DATA YS09J10B-A PERFORMANCE DATAYS12J33-A YM18J34A-ABTUH Evaporator Air Temperature Rise@70F Inside 62F Outside 9700Refrigeration System Sequence of Operation Electric shock hazard Electrical Rating TablesInstallation Notes Wire SizeCOMPRESSORS COMPONENTS OPERATION & TESTINGTHERMAL OVERLOAD External WINDING TESTTERMINAL OVERLOAD Internal TERMINAL OVERLOAD - TESTCHECKING THE INTERNAL OVERLOAD FAN MOTOR1.Off Position - no continuity between terminals SYSTEM CONTROL PANEL EQ Model Only See Figure SYSTEM CONTROL PANEL KQ Models Only- See FigureSYSTEM CONTROL PANEL YQ Model Only SYSTEM CONTROL SWITCH WE & WY Models See Figure SYSTEM CONTROL SWITCH - TESTSYSTEM CONTROL PANEL SYSTEM CONTROL PANEL See Figure SYSTEM CONTROL SWITCH See Figure SYSTEM CONTROL SWITCH - TESTSYSTEM CONTROL SWITCH Heat Pump & Electric Heat ModelsTO ADJUST FAN SPEED TO ADJUST TEMPERATURESmart Center Electronic Control Center TO SET MODE OF OPERATIONTESTING THE ELECTRONIC CONTROL TO SET THE TIMERTESTING THE ELECTRONIC CONTROL ERROR CODE LISTINGSTHERMOSTAT SQ & KQ Models - See Figure TESTTEST THERMOSTAT YQ Model Only See FigureTEST THERMOSTAT ADJUSTMENTDEFROST THERMOSTAT Heat Pump Models Only THERMOSTAT BULB LOCATIONRetainer DEFROST BULB LOCATION Heat Pump Models OnlyRESISTOR: Heat Anticipator See Figure CAPACITOR, RUN See FigureHEAT PUMPS: REVERSING VALVE See Figure CHECK VALVE OPERATIONTESTING REVERSING VALVE SOLENOID COIL Heat Pump Models Only See FigureTO TEST VALVE, DRAIN PAN See Figure NOTE: Always replace with the exact replacementHEATING ELEMENT See Figure SEALED REFRIGERATION SYSTEM REPAIRSHERMETIC COMPONENT REPLACEMENT REFRIGERANT CHARGINGSPECIAL PROCEDURE IN THE CASE OF TROUBLESHOOTING AND SERVICEMETHOD OF CHARGING Undercharged Refrigerant SystemsNOTE: Heat pump refrigeration drawing Overcharged Refrigerant SystemsRestricted Refrigerant System Routine Maintenance not shift from cool to heat Valve will not shift from cool to heat Valve willStarts to shift but does not complete reversal Apparent leap in heatingPROBLEM Troubleshooting: CoolingPROBLEM PROBLEMPROBLEM PROBLEMPROBLEM POSSIBLE CAUSEPoorly installed unit Evaporator drain pan cracked or PROBLEM Troubleshooting: Heating Heat pumpsPROBLEM PROBLEMOutdoor thermostat does not cut off PROBLEM PROBLEMPOSSIBLE CAUSE TO CORRECTPROBLEM Troubleshooting: Heating Cooling/Electric ModelsPROBLEM PROBLEMREFRIGERANT SYSTEM DIAGNOSIS COOLING Troubleshooting Chart — CoolingPROBLEM POSSIBLE CAUSEElectrical Troubleshooting Chart Heat Pump Troubleshooting Chart — HeatingREFRIGERANT SYSTEM DIAGNOSIS – HEATING SYSTEM COOLS WHEN HEATING IS DESIREDWIRING DIAGRAM SCHEMATICMODELS SCHEMATIC WIRING DIAGRAMMODELS SQ06J10B-B, SQ06J10B-A, SQ08J10C-A, SQ08J10D-ASCHEMATIC WIRING DIAGRAMMODELS SEE DETAIL AWIRING DIAGRAM KQ08J10B-1, KQ08J10B-A, KQ08J10C-ASCHEMATIC SYSTEM SWITCHSCHEMATIC MODELSWIRING DIAGRAM PTCR WIRING DIAGRAM SCHEMATICMODEL YQ06J10B-A MODEL: SC06H10D SS12J10AR-B, SS14J10R-A, SS12J30D-A, SS16J30A-A SS08J10R-B, SS08J10R-A, SS09J10C-A, SS10J10AR-ASS18J30R-A, SM20J30-A, SM24J30-A SCHEMATICSCHEMATIC WIRING DIAGRAMMODELS SL28J30B-A, SL35J30-A, SL35J30-B WIRING DIAGRAM SCHEMATICMODELS KS12J30B-A, KS18J30-A, KM20J30-A, KM24J30-AWIRING DIAGRAM SCHEMATICMODELS WIRING DIAGRAM YS12J33-A, YM18J34B-A, YL24J35C-ASCHEMATIC MODELSYS09J10B-A MODELWIRING DIAGRAM SCHEMATICWIRING DIAGRAM EQ08J11-A, EQ08J11-BSCHEMATIC MODELSSCHEMATIC WIRING DIAGRAMMODELS WS07A10E-B, WS07A10E-C, WS10A10-A, WS12A10E-AWIRING DIAGRAM WE09A33E-B, WE12A33E-A, WE15A33-ASCHEMATIC MODELSWIRING DIAGRAM WY09A33F-A, WY12A33G-ASCHEMATIC MODELSTesting The Electronic Control Checking Room Temperature2001 XQ Boards & QME Boards Post Office Box 1540 · San Antonio, Texas FRIEDRICH AIR CONDITIONING CO4200 N. Pan Am Expressway · San Antonio, Texas Printed in the U.S.A