Problem Possible Cause To Correct | Friedrich 2003 specification

PROBLEM		POSSIBLE CAUSE	TO CORRECT

		Dirty filter.	Clean as recommended in Owner’s Manual.
Evaporator coil		Restricted air flow.	Check for dirty or obstructed coil - clean as re-
Evaporator coil			quired.
freezes up.		Inoperative thermostat.	Test for shorted thermostat or stuck contacts.
		Short of refrigerant.	De-ice coil and check for leak.
		Inoperative fan motor.	Test fan motor and replace if inoperative.
		Partially restricted capillary.	De-ice coil. Check temperature differential across
			coil. Touch test coil return bends for same tempera-
			ture. Test for low running current.

PROBLEM		POSSIBLE CAUSE	TO CORRECT:

		Excessive heat load.	Unit undersized. Test cooling performance of unit.
Compressor runs			Replace with larger unit.
Compressor runs		Restriction in line.	Check for partially iced coil. Check temperature split
continually.		Restriction in line.	Check for partially iced coil. Check temperature split
continually.			across coil.
			across coil.
		Refrigerant leak.	Check for oil at silver soldered connections. Check
Does not cycle off.			for partially iced coil. Check split across coil. Check
Does not cycle off.			for low running amperage.
		Thermostat contacts stuck	Check operation of thermostat. Replace if contacts
			remain closed.
		Thermostat incorrectly wired.	Refer to appropriate wiring diagram.

PROBLEM	POSSIBLE CAUSE	TO CORRECT:

	Thermostat contacts stuck.	Replace thermostat.
Thermostat does not	Thermostat set at coldest point.	Turn to higher temperature setting to see if the unit
turn unit off.		cycles off.
	Incorrect wiring.	Refer to appropriate wiring diagram.
	Unit undersized for area to be cooled.	Refer to Sizing Chart.

PROBLEM	POSSIBLE CAUSE	TO CORRECT

	Overload inoperative. Opens too soon.	Check operation of unit. Replace overload if
		system operation is satisfactory.
	Compressor attempts to start before	Allow a minimum of two (2) minutes for pressures
	system pressures are equalized.	to equalize before attempting to restart. Instruct
		customer of waiting period.
Compressor attempts	Low or fluctuating voltage.	Check voltage with unit operating. Check for other
Compressor attempts		appliances on circuit. Air conditioner should be on
to start, or runs for		separate circuit for proper voltage, and be fused
short periods only.		separately.
Cycles on overload.	Incorrect wiring.	Refer to appropriate wiring diagram.
	Shorted or incorrect capacitor.	Check by substituting a known good capacitor of
		correct rating.
	Restricted or low air flow through	Check for proper fan speed or blocked condenser.
	condenser coil.	Check for kinked discharge line or restricted condenser.
	Compressor running abnormally hot.	Check amperage.

PROBLEM	POSSIBLE CAUSE	TO CORRECT

Thermostat does not	Loss of charge in thermostat bulb.	Place jumper across thermostat terminals to check
Thermostat does not		if unit operates. If unit operates, replace thermostat.
turn unit on.

	Loose or broken parts in thermostat.	Check as above.
	Incorrect wiring.	Refer to appropriate wiring diagram.

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Image 37

Friedrich 2003 service manual Problem Possible Cause To Correct

Contents

2003 Table of Contents RAC Serial Number Identification Guide 1st Digit Function00001 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 SC06H10E Heating Btuh WY09A33F-A WY12A33F-A HeatingAmps Refrigeration System Sequence of Operation Fuse/Circuit Wire SizeBreaker Grounding Winding Test Thermal Overload ExternalChecking Compressor Efficiency Terminal Overload Internal Terminal Overload TestChecking the Internal Overload FAN Motor Resistor System Control Panel System Control Panel KQ Models Only- See FigureEQ Model Only See Figure System Control Panel YQ Model Only System Control Switch Test System Control Switch WE & WY Models See Figure System Control Panel See Figure System Control Switch KS, SS, KM, SM, SL Models See Figure Heat Pump & Electric Heat Models See Figure System Control Switch To Adjust Temperature To SET Mode of OperationTo Adjust FAN Speed Smart Center Electronic Control Center Testing the Electronic Control To SET the TimerTesting the Electronic Control Error Code Listings To SET Hour Clock Thermostat SQ & KQ Models See Figure TestThermostat YQ Model Only See Figure Thermostat Models ES, YS, EM, YM, EL, YL See Figure Defrost Thermostat Heat Pump Models Only Thermostat AdjustmentThermostat Bulb Location CAPACITOR, RUN See Figure Defrost Bulb Location Heat Pump Models OnlyCapacitor Test Heat Pumps Reversing Valve See Figure Check Valve Operation Solenoid Coil Heat Pump Models Only See Figure Testing Reversing ValveTo Test Heating Element See Figure VALVE, Drain PAN See FigureSealed Refrigeration System Repairs Equipment Required Special Procedure in the Case Compressor Motor Burnout Hermetic Component ReplacementRotary Compressor Special Troubleshooting and Service Equipment Must be Capable Method of Charging Undercharged Refrigerant Systems Overcharged Refrigerant Systems Restricted Refrigerant System Routine Maintenance Troubleshooting Touch Test Chart To Service Reversing Valves Problem To Correct Troubleshooting Cooling Problem 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 YES System Cools When Heating is Desired Models SQ06J10B-B, SQ06J10B-A, SQ08J10C-A, SQ08J10D-A Models KQ08J10B-1, KQ08J10B-A, KQ08J10C-A Schematic YQ06J10B-A Model Model SC06H10D 619-405-06 Alternate SL28J30B-A, SL35J30-A, SL35J30-B Conductor 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 Checking Room Temperature Testing The Electronic Control XQ Boards & QME Boards Friedrich AIR Conditioning CO