Friedrich 2003 service manual Cycles

Page 38

PROBLEM

POSSIBLE CAUSE

TO CORRECT

 

 

 

 

Poorly installed unit.

Refer to Installation Instructions for proper

 

 

installation.

 

Fan blade striking chassis.

Reposition - adjust motor mount.

Noisy operation.

Compressor vibrating.

Check that compressor grommets have not

deteriorated. Check that compressor mounting

 

 

 

parts are not missing, and that shipping blocks

 

 

have been removed.

 

Improperly mounted or loose cabinet

Check assembly and parts for looseness,

 

parts.

rubbing and rattling.

 

 

 

PROBLEM

POSSIBLE CAUSE

TO CORRECT

 

 

 

 

Evaporator drain pan overflowing.

Clean obstructed drain trough.

 

Condensation forming on base pan.

Evaporator drain pan broken or cracked. Reseal or

Water leaks into room.

 

replace.

 

Poor installation resulting in rain

Check Installation Instructions. Reseal as required.

 

entering room.

 

 

Condensation on discharge grilles.

Dirty evaporator coil - clean.

 

 

Very high humidity level.

 

 

 

PROBLEM

POSSIBLE CAUSE

TO CORRECT

 

 

 

 

Thermostat differential too narrow.

Replace thermostat.

Thermostat short

Plenum gasket not sealing, allowing

Check gasket. Reposition or replace.

discharge air to short cycle thermostat.

 

cycles.

 

 

Restricted coil or dirty filter.

Clean and advise customer of periodic cleaning of

 

 

filter.

 

Tubular insulation missing from top of

Replace tubular insulation on bulb.

 

thermostat bulb.

(Applicable models.)

 

Thermostat bulb touching thermostat

Adjust bulb bracket.

 

bulb support bracket.

(Applicable models.)

 

 

 

PROBLEM

POSSIBLE CAUSE

TO CORRECT

 

 

 

 

 

 

 

 

 

Anticipator (resistor) wire disconnected

Refer to appropriate wiring diagram.

 

 

at thermostat or system switch.

 

 

 

 

 

 

Anticipator (resister shorted or open).

Disconnect plug from outlet. Remove resistor from

 

 

Prolonged off-cycles.

(Applicable models.)

bracket. Insert plug and depress "Cool" and "Fan -

 

Auto (MoneySaver)” buttons. Place thermostat to

(automatic operation)

 

 

warmest setting. Feel resistor for temperature.

 

 

 

 

 

 

If no heat, replace resistor.

 

 

Partial loss of charge in thermostat

Replace thermostat.

 

 

 

bulb causing a wide differential.

 

 

 

 

 

 

 

 

 

 

 

PROBLEM

POSSIBLE CAUSE

TO CORRECT

 

 

 

 

Switches from

Thermostat sticking.

Change room thermostat.

cooling to heating.

Incorrect wiring.

Refer to appropriate wiring diagram.

 

 

 

 

 

38

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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 Breaker Wire SizeFuse/Circuit GroundingChecking Compressor Efficiency Thermal Overload ExternalWinding Test Checking the Internal Overload Terminal Overload TestTerminal Overload Internal 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 Adjust FAN Speed To SET Mode of OperationTo Adjust Temperature Smart Center Electronic Control CenterTesting the Electronic Control Error Code Listings To SET the TimerTesting the Electronic Control To SET Hour ClockThermostat YQ Model Only See Figure TestThermostat SQ & KQ Models 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 Sealed Refrigeration System Repairs VALVE, Drain PAN See FigureHeating Element See Figure Equipment RequiredRotary Compressor Special Troubleshooting and Service Hermetic Component ReplacementSpecial Procedure in the Case Compressor Motor Burnout 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
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