Friedrich RAC-SVC-06 Troubleshooting Chart Heating, Electrical Troubleshooting Chart Heat Pump

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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

Across Outdoor Coil

for Operation in Heating

Restriction

For Operation In Heating

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)

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?

NO

Replace the Solenoid Coil

 

 

YES

 

 

Reversing Valve Stuck

 

 

Replace the Reversing Valve

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Contents 2006 Table of Contents IntroductionRoom AIR Conditioners Limited Warranty Routine Maintenance 08 L 1 Unit IdentificationPerformance Data ChassisElectrical Data ReceptacleFunctional Component Definitions Electronic ControlsTesting the Electronic Control XQ/WS Boards & QME Boards Testing the Electronic Control Error Code ListingsRefrigeration System Sequence of Operation Sealed Refrigeration System RepairsRotarycompressorspecialtroubleshooting and Service Hermetic Component ReplacementSpecialprocedureinthecaseofcompressor Motor Burnout Equipment RequiredRefrigerant Charging Method of ChargingUndercharged Refrigerant Systems Overcharged Refrigerant SystemsRestricted Refrigerant System Normal Function of Valve Malfunction of ValveCooling only Room AIR Conditioners Troubleshooting Tips Problem Possible Cause ActionReplace fuse, reset breaker. If repeats, check Problem Possible Cause Action Problem Possible Cause Action Heat / Cool Room AIR Conditioners Troubleshooting Tips Troubleshooting Chart Cooling Refrigerant System Diagnosis HeatingSystem Cools When Heating is Desired Troubleshooting Chart HeatingElectrical Troubleshooting Chart Heat Pump YESModel Models RM18L30-A, KM18L30-A, KM21L30-A, RM24L30-A, KM24L30-A SS16L30-A/B, SM18L30-A/B, SM21L30-A/B, SM24L30-A/B SL36L30-A 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-06