Manuals / Friedrich / Household Appliance / Air Conditioner

Friedrich 2008 Troubleshooting Chart - Heatpump, Refrigerant System Diagnosis - Cooling Cycle

Models: 2009 2008

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Problem

HEAT / COOL ROOM AIR CONDITIONERS: TROUBLE SHOOTING TIPS

	Problem	Possible Cause	Action
		Incorrect wiring	Refer to applicable wiring diagram
		Defective solenoid coil	Check for continuity of coil
	Unit cools when		Block condenser coil & switch unit to cooling.
	Unit cools when		Allow pressure to build up in system, then
	heat is called for	Reversing valve fails to shift	Allow pressure to build up in system, then
	heat is called for	Reversing valve fails to shift	switch to heating. If valve fails to shift, replace
			switch to heating. If valve fails to shift, replace
			valve.
		Inoperative system switch	Check for continuity of system switch

	Problem	Possible Cause	Action

		Heating capillary tube partially	Check for partially starved outer coil. Replace
		restricted	heating capillary tube
			Switch unit several times from heating to
	Cooling adequate,	Check valve leaking internally	cooling. Check temperature rise across
	but heating	Check valve leaking internally	coil. Refer to speciﬁcation sheet for correct
	but heating		coil. Refer to speciﬁcation sheet for correct
	insufﬁcient		temperature rise
		Reversing valve failing to shift	Deenergize solenoid coil, raise head pressure,
		Reversing valve failing to shift	energize solenoid to break loose. If valve fails
		completely; bypassing hot gas	energize solenoid to break loose. If valve fails
		completely; bypassing hot gas	to make complete shift, replace valve.
			to make complete shift, replace valve.

TROUBLESHOOTING CHART — HEATPUMP

REFRIGERANT SYSTEM DIAGNOSIS - COOLING CYCLE

LOW SUCTION PRESSURE			HIGH SUCTION PRESSURE			LOW HEAD PRESSURE

HIGH HEAD PRESSURE

Low Load Conditions

Low Air Flow Across

Indoor Coil

Refrigerant System

Restriction

Undercharged

Moisture in System

High Load Conditions

High Air Flow Across

Indoor Coil

Reversing Valve not

Fully Seated

Overcharged

Defective Compressor

Low Load Conditions

Refrigerant System

Restriction

Reversing Valve not

Fully Seated

Undercharged

in System

Defective Compressor

High Load Conditions

Low Air Flow Across

Outdoor Coil

Overcharged

Noncondensables (air)

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Image 48

Friedrich 2008 Troubleshooting Chart - Heatpump, Refrigerant System Diagnosis - Cooling Cycle, Problem, Possible Cause

Contents

Models PowerTimer Warmer Power Money Saver Set HrTECHNICAL SUPPORT CONTACT INFORMATION FRIEDRICH AIR CONDITIONING COPost Office Box 1540 · San Antonio, Texas 4200 N. Pan Am Expressway · San Antonio, TexasTable Of Contents IMPORTANT SAFETY INFORMATION PERSONAL INJURY OR DEATH HAZARDSELECTRICAL HAZARDS REFRIGERATION SYSTEM HAZARDS MECHANICAL HAZARDSPROPERTY DAMAGE HAZARDS FIRE DAMAGE HAZARDSWATER DAMAGE HAZARDS Introduction TYPICAL UNIT COMPONENTSS S 08 L 1 0 E Unit Identification Model Number CodeRAC Serial Number Identification Guide 1st Digit - FunctionChassis Specifications for 2009, 2008 models Electrical Characteristics 60 HertzEER COP Modelinstallation information / sleeve dimensions Circuit Rating / BreakerWindow Mounting Kits MinimumPERFORMANCE DATA for 2009, 2008 models electrical DATA HACR Heating Air Conditioning and RefrigerationELECTRIC SHOCK HAZARD FIRE HAZARDMake sure the wiring is adequate for your unit Test the power cordKeep the filter clean Unit placementTo adjust fan speed To set the timerTo start unit To set mode of operationTo adjust temperature To set the hour clockTo set the timer To adjust fan speedTo adjust temperature To adjust fan speedTo set the timer To start unitHow to use the remote control XQ models To adjust temperature settingTo set the timer To adjust fan speedHow to operate the Friedrich room air conditioner Temperature controlMoney Saver switch QuietMaster / Twintemp modelsEQ08 models Function ControlChecking Room Temperature Function Control1.Activate Error Code Mode by pressing the “TIMER ON/ OFF” button on XQ models. LED for the “TIMER ON/ OFF” will flash 1 bps while Error Code Mode is active. Pressing the “TEMP/HR ” button will display 00. Consecutive presses will scroll through all error codes logged. Press the “TEMP/HR ” button to see the reverse order of all error codes logged. When the end of logged error codes is reached the temperature set point will appear TESTING THE ROTARY CONTROL SWITCHES ELECTRIC SHOCK HAZARDKS, KM, SL Models See Figure FUNCTIONAL COMPONENT DEFINITIONS “EQ08” SYSTEM CONTROL SWITCH - TESTMECHANICAL COMPONENTS ELECTRICAL COMPONENTSCOMPONENTS TESTING THERMOSTAT ADJUSTMENTTHERMOSTAT “EQ08” Models See Figure ELECTRIC SHOCK HAZARDCOMPONENTS TESTING Continued RESISTOR Heat Anticipator See FigureDEFROST THERMOSTAT Heat Pump Models Only ELECTRIC SHOCK HAZARDCAPACITORS Capacitor Check with Capacitor AnalyzerCapacitor Connections COMPONENTS TESTING ContinuedCOMPONENTS TESTING Continued TESTING THE HEATING ELEMENTHEATING ELEMENT See Figure HEATING ELEMENT Heat Pump ModelsOPERATING SEQUENCE / CHARACTERISTICS AND FEATURES Compressor Time Delay 180 secondsReturn Air Temperature Sensor Mode ControlREFRIGERATION SEQUENCE OF OPERATION SEALED REFRIGERATION SYSTEM REPAIRS Refrigerant ChargingEQUIPMENT REQUIRED EQUIPMENT MUST BE CAPABLE OFMethod Of Charging / Repairs BURN HAZARDFREEZE HAZARD BURN HAZARDUndercharged Refrigerant Systems Overcharged Refrigerant SystemsELECTRIC SHOCK HAZARD HIGH PRESSURE HAZARDRestricted Refrigerant System HERMETIC COMPONENTS CHECK METERING DEVICECHECK VALVE Capillary Tube SystemsREVERSING VALVE DESCRIPTION/OPERATION ELECTRIC SHOCK HAZARDTESTING THE COIL CHECKING THE REVERSING VALVEELECTRIC SHOCK HAZARD HIGH PRESSURE HAZARDProcedure For Changing Reversing Valve Touch Test in Heating/Cooling CycleBURN HAZARD HIGH PRESSURE HAZARDSingle Phase Connections Single Phase Running and L.R.A. TestCOMPRESSOR CHECKS Locked Rotor Voltage L.R.V. TestSingle Phase Resistance Test ELECTRIC SHOCK HAZARDGROUND TEST CHECKING COMPRESSOR EFFICIENCYCOMPRESSOR REPLACEMENT Recommended procedure for compressor replacementHIGH TEMPERATURES RISK OF ELECTRIC SHOCKELECTRIC SHOCK HAZARD HIGH PRESSURE HAZARDEXPLOSION HAZARD ROUTINE MAINTENANCE EXCESSIVE WEIGHT HAZARDBLOWER WHEEL / HOUSING / CONDENSER FAN / SHROUD ELECTRIC SHOCK HAZARDROUTINE MAINTENANCE Continued Problem ProblemProblem Possible CauseProblem ProblemProblem ProblemProblem ProblemProblem ProblemProblem ProblemProblem ProblemProblem ProblemProblem Possible CauseTROUBLESHOOTING CHART - HEATPUMP ProblemREFRIGERANT SYSTEM DIAGNOSIS - COOLING CYCLE Possible CauseELECTRICAL TROUBLESHOOTING CHART - HEAT PUMP REFRIGERANT SYSTEM DIAGNOSIS - HEATING CYCLEHEAT PUMP TROUBLESHOOTING CHART - HEATPUMPTEMPERATURE OF VALVE BODY POSSIBLE CAUSESCORRECTIONS NORMAL FUNCTION OF VALVEELECTRONIC CONTROL COOL ONLY MODELS XQ05L10A-C XQ06L10A-C XQ08L10A-B,A-EXQ10L10A-C XQ12L10A-B,A-C ELECTRONIC CONTROL COOL ONLY MODELS ELECTROMECHANICAL CONTROL COOL ONLY MODELS SL28L30-D,-E SL36L30A-D,A-E ELECTROMECHANICAL CONTROL COOL ONLY MODELSPage ELECTROMECHANICAL CONTROL COOL WITH ELECTRIC HEAT MODELSES12L33-D,-E ES16L33-C,-D EM18L34-C EM24L34-B COOL WITH ELECTRIC HEAT MODELS EL36L35A-D,A-E ELECTROMECHANICAL CONTROLELECTROMECHANICAL CONTROL HEAT PUMP ONLY MODELS YS09L10-F,-GHEAT PUMP WITH ELECTRIC HEAT MODELS YS13L33-D,-E YM18L34-D,-EELECTROMECHANICAL CONTROL HEAT PUMP WITH ELECTRIC HEAT MODELS YL24L35-E,-F ELECTROMECHANICAL CONTROLINSTRUCTIONS FOR USING COOLING LOAD ESTIMATE FORM FOR ROOM AIR CONDITIONERSAHAM PUB. NO. RAC-1 COOLING LOAD ESTIMATE FORM HEAT GAIN FROMQUANTITY FACTORSHEAT LOAD FORM Following is an example using the heat load formHEATING LOAD FORM FRIEDRICH ROOM UNIT HEAT PUMPS WINDOWS & DOORS Area, sq. ftINFILTRATION - WINDOWS & DOORS AVG ROOM AIR CONDITIONERS LIMITED WARRANTY FIRST YEARSECOND THROUGH FIFTH YEAR Page TECHNICAL SUPPORT CONTACT INFORMATION FRIEDRICH AIR CONDITIONING COPost Office Box 1540 · San Antonio, Texas 4200 N. Pan Am Expressway · San Antonio, TexasFRIEDRICH AIR CONDITIONING CO Post Office Box 1540 · San Antonio, TexasRAC-ServMan