Friedrich 2003 service manual Troubleshooting Chart Cooling

Page 44

PROBLEM	POSSIBLE CAUSE	TO CORRECT


Compressor will not	Outdoor thermostat.	Refer to the heating data on applicable models for
turn off and operate on	(Applicable models.)	the preselected temperature the compressor shuts
heating element only		off and the electric element is energized.
during low outside
ambients.

Troubleshooting Chart — Cooling

REFRIGERANT SYSTEM

DIAGNOSIS COOLING

Low Suction Pressure

High Suction Pressure

Low Head Pressure

High Head Pressure

Low Load Conditions

High Load Conditions

Low Load Conditions

High Load Conditions

Low Air Flow Across

High Air Flow Across

Refrigerant System

Low Air Flow Across

Indoor Coil

Indoor Coil

Restriction

Outdoor Coil

Refrigerant System

Reversing Valve not

Reversing Valve not

Overcharged

Restriction

Fully Seated

Fully Seated

Undercharged

Overcharged

Undercharged

Noncondensables (air)

in

System

Moisture in System

Defective Compressor

Defective Compressor

44

Image 44

Contents 2003 Table of Contents 00001 1st Digit FunctionRAC Serial Number Identification Guide 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 Heating SC06H10EAmps WY09A33F-A WY12A33F-A HeatingBtuh Refrigeration System Sequence of Operation Wire Size Fuse/CircuitBreaker GroundingChecking Compressor Efficiency Thermal Overload ExternalWinding Test Terminal Overload Test Terminal Overload InternalChecking the Internal Overload FAN MotorResistor EQ Model Only See Figure System Control Panel KQ Models Only- See FigureSystem Control Panel System Control Panel YQ Model Only System Control Switch WE & WY Models See Figure System Control Switch TestSystem Control Switch KS, SS, KM, SM, SL Models See Figure System Control Panel See FigureSystem Control Switch Heat Pump & Electric Heat Models See FigureTo SET Mode of Operation To Adjust TemperatureTo Adjust FAN Speed Smart Center Electronic Control CenterTo SET the Timer Testing the Electronic ControlTesting the Electronic Control Error Code Listings To SET Hour ClockTest Thermostat SQ & KQ Models See FigureThermostat YQ Model Only See Figure Thermostat Models ES, YS, EM, YM, EL, YL See FigureThermostat Bulb Location Thermostat AdjustmentDefrost Thermostat Heat Pump Models Only Capacitor Test Defrost Bulb Location Heat Pump Models OnlyCAPACITOR, RUN See Figure Check Valve Operation Heat Pumps Reversing Valve See FigureTo Test Testing Reversing ValveSolenoid Coil Heat Pump Models Only See Figure VALVE, Drain PAN See Figure Heating Element See FigureSealed Refrigeration System Repairs Equipment RequiredHermetic Component Replacement Special Procedure in the Case Compressor Motor BurnoutRotary Compressor Special Troubleshooting and Service Equipment Must be CapableUndercharged Refrigerant Systems Method of ChargingOvercharged Refrigerant Systems Restricted Refrigerant System Routine Maintenance Troubleshooting Touch Test Chart To Service Reversing Valves Troubleshooting Cooling Problem To CorrectProblem 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 System Cools When Heating is Desired YESModels SQ06J10B-B, SQ06J10B-A, SQ08J10C-A, SQ08J10D-A Models KQ08J10B-1, KQ08J10B-A, KQ08J10C-A Schematic Model YQ06J10B-AModel SC06H10D 619-405-06 SL28J30B-A, SL35J30-A, SL35J30-B AlternateConductor 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 Testing The Electronic Control XQ Boards & QME Boards Checking Room TemperatureFriedrich AIR Conditioning CO