Friedrich WS10B10 service manual Problem Possible Cause Possible Action

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COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS

Problem	Possible Cause	Possible Solution
	Sublimation:	Ensure that foam gaskets are installed in
	When unconditioned saturated,	between window panes & in between the
	outside air mixes with conditioned	unit & the sleeve. Also, ensure that fresh
	air, condensation forms on the	air/exhaust vents (on applicable models) are in
Water “spitting”	cooler surfaces	the closed position & are in tact
into room	Downward pitch of installation is	Follow installation instructions to ensure that
	Downward pitch of installation is	downward pitch of installed unit is no less than
	too steep towards back of unit	downward pitch of installed unit is no less than
	too steep towards back of unit	1/4” & no more than 3/8”
		1/4” & no more than 3/8”
	Restricted coil or dirty ﬁlter	Clean & advise customer of periodic cleaning
	Restricted coil or dirty ﬁlter	& maintenance needs of entire unit
		& maintenance needs of entire unit

	Problem	Possible Cause	Possible Solution
		Insufﬁcient air circulation thru area	Adjust louvers for best possible air circulation
		to be air conditioned
	Excessive
		Oversized unit	Operate in “MoneySaver” position
	moisture
		Inadequate vapor barrier in building	Advise customer

		structure, particularly ﬂoors

	Problem	Possible Cause	Possible Solution
		Defective thermistor	Replace thermistor or electronic control board
		Unit oversized	See sizing chart.
	Unit short cycles	Chassis seal gasket not sealing or	Check gasket. Reposition or replace as
	Unit short cycles	absent causing unit to short cycle	needed
		absent causing unit to short cycle	needed

		Restricted coil or dirty ﬁlter	Clean & advise customer of periodic cleaning
		Restricted coil or dirty ﬁlter	& maintenance needs of entire unit
			& maintenance needs of entire unit

	Problem	Possible Cause	Possible Action
	Prolonged off	Defective indoor ambient air thermistor	Replace thermistor or electronic control board
	cycles	Defective indoor ambient air thermistor	Replace thermistor or electronic control board
	cycles

	Problem	Possible Cause	Possible Solution
		Evaporator drain pan cracked or	Repair, clean or replace as required
		obstructed	Repair, clean or replace as required
		obstructed
		Water in compressor area	Detach shroud from pan & coil. Clean &
	Outside water	Water in compressor area	remove old sealer. Reseal, reinstall & check
	Outside water		remove old sealer. Reseal, reinstall & check
	leaks	Obstructed condenser coil	Use pressure wash or biodegradable cleaning
		Obstructed condenser coil	agent to clean
			agent to clean
		Fan blade/slinger ring improperly	Adjust fan blade to 1/2” of condenser coil ﬁn
		positioned	pack

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Contents Thru-the-wall Table Of Contents Your safety and the safety of others are very important Important Safety InformationRefrigeration System Hazards Property Damage Hazards IntroductionFriedrich wallmaster Model Number Code Performance Data Sleeve / Chassis DimensionsPlug/Outlet/Circuit Rating Electrical DataElectric Shock Hazard Fire HazardElectronic Control Operation To adjust fan speedTo activate Smart FanWS cool-only models To activate Smart FanWY/WE heat-cool modelsChecking Room Temperature To set the timerTo Activate Money Saver WY/WE models To adjust temperature To set mode of operationTo start unit Testing the Electronic Control Error Code ModeElectronic Control Panel Automatic component protectionError Codes Listing for WE/WY Models Error Codes Listing for WS ModelsReboot the Control Panel E7 Motor Operation E9 Heat Pump FailureCoil Sensors Components TestingFAN Motor FAN Motor TestHeating Element CapacitorsDrain PAN Valve Capacitor Check with Capacitor AnalyzerRefrigeration System Sequence of Operation Refrigeration system under high pressure 410A Sealed System Repair ConsiderationsEquipment Required 410A Sealed Refrigeration System RepairsEquipment Must be Capable Risk of Electric ShockBurn Hazard Method Of Charging / RepairsFreeze Hazard Overcharged Refrigerant Systems Undercharged Refrigerant SystemsRestricted Refrigerant System Metering Device Hermetic Components CheckCheck Valve Capillary Tube SystemsPOSITION, 4 Port Reversing Valve Reversing Valve DESCRIPTION/OPERATIONChecking the Reversing Valve Testing the CoilTouch Test in Heating/Cooling Cycle Procedure For Changing Reversing ValveExplosion Hazard Compressor Checks Ground Test Single Phase Resistance TestRecommended procedure for compressor replacement Compressor ReplacementHigh Temperatures Rotary Compressor Special Troubleshooting and Service Routine Maintenance Front Cover Sleeve / DrainClearances Date Model Serial Room AIR Conditioner Unit Performance Test Data SheetGeneral Troubleshooting Tips General Troubleshooting Tips Cooling only Room AIR Conditioners Troubleshooting Tips Possible Cause Possible Solution Problem Possible Cause Possible Action HEAT/COOL only Room AIR Conditioners Troubleshooting Tips Heat Pump Troubleshooting Troubleshooting Chart Heating Heat Pump Troubleshooting Chart CoolingProblem System Cools When Heating is Desired Electrical Troubleshooting Chart Heat PumpYES Malfunction of Valve Normal Function of ValvePage Page Page Installation Accessories Wall Preparation Mounting Hardware ProvidedDescription QTY MECHANICALCUT/SEVER Hazardhazard Installation RequirementsMECHANICALCUT/SEVER Hazard Installation Instructions for Baffle Adapter KIT BAKCUT/SEVER WallMaster Thru-the-WallMechanical Hazard MECHANICALCUT/SEVER Hazard Installation InstructionsAssembly & Installation Instructions Installation Instructions Subbase for WS, WE & WY Models Installation Instructions Architectural Grille Model AG MECHANICALCUT/SEVER Hazard WALLMASTER≤ THRU-THE-WALL AIR Conditioners Limited Warranty Technical Support Contact Information Page Page Friedrich AIR Conditioning CO