Manuals / Carrier / Kitchen Appliance / Refrigerator

Carrier 69NT40-511-199, 69NT40-521 manual Power Autotransformer Malfunction

Models: 69NT40-521 69NT40-511-1 69NT40-511-199

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			REMEDY/
	CONDITION	POSSIBLE CAUSE	REFERENCE
			SECTION
	5.11 THERMOSTATIC EXPANSION VALVE MALFUNCTION

		Low refrigerant charge	6.4/6.6
		External equalizer line plugged	Open
		Wax, oil or dirt plugging valve or orifice Ice formation at	6.26
	Low suction pressure with high	valve seat
	Low suction pressure with high	Superheat too high	6.4/6.6
	superheat	Superheat too high	6.4/6.6
	superheat	Power assembly failure	6.26.c
		Power assembly failure	6.26.c
		Loss of element/bulb charge	6.26
		Broken capillary	6.26
		Foreign material in valve	6.26
	High suction pressure with low	Superheat setting too low	6.26.c
	High suction pressure with low	External equalizer line plugged Ice holding valve open	Open
	superheat	External equalizer line plugged Ice holding valve open	Open
	superheat	Foreign material in valve	6.4/6.5 6.26
		Foreign material in valve	6.4/6.5 6.26

	Liquid slugging in compressor	Pin and seat of expansion valve eroded or held open by	6.26
	Liquid slugging in compressor	foreign material
		foreign material
	Fluctuating suction pressure	Improper bulb location or installation	6.26
	Fluctuating suction pressure	Low superheat setting	6.26.c
		Low superheat setting	6.26.c
	5.12 POWER AUTOTRANSFORMER MALFUNCTION

		Circuit breaker (CB-1 or CB-2) tripped	Check
	Unit will not start	Power transformer defective	6.22
	Unit will not start	Power source not turned ON	Check
		Power source not turned ON	Check
		460 VAC power plug is not inserted into the receptacle	2.4

	5.13 WATER-COOLED CONDENSER OR WATER PRESSURE SWITCH

	High discharge pressure	Dirty coil	6.28
	High discharge pressure	Noncondensibles
		Noncondensibles
	Condenser fan starts and stops	Water pressure switch malfunction	Check
	Condenser fan starts and stops	Water supply interruption
		Water supply interruption

T-268-07

5-4

Image 94

Carrier 69NT40-511-199, 69NT40-521 Power Autotransformer Malfunction, WATER-COOLED Condenser or Water Pressure Switch

Contents

Container Refrigeration Unit Operation Container Refrigeration Unit Models Maintenance Precautions General Safety NoticesOperating Precautions Safety-1 268-07Safety-2 Specific Warning and Caution StatementsTable of Contents Operation Section Service Iii 268-07List of Illustrations 27 Suction Solenoid Valve SSV -- Alco List of Tables Section Introduction IntroductionModel Chart ModelTransformer Humidity Sensor TransFresh PID 69NT40-511-58 69NT40-511-71 69NT40-511-95 69NT40-521-10 General Description Refrigeration Unit -- Front SectionEvaporator Section Refrigeration Unit -- Rear Panels Removed Compressor Section 1011Condenser Section Condenser Section 268-07Receiver Section 1716Water-Cooled Condenser Section Optional Units with Water-Cooled Condenser123 Control Box with a Single-Speed Compressor6 9 Control Box with a Two-Speed Compressor Optional Refrigeration System Data Electrical Data To Operate Unit on 380/460 vac Power Supply Power Autotransformer OptionalStep-Up Power Autotransformer To Operate Unit on 190/230 vac Power SupplyLower Fresh AIR Makeup Vent Optional Upper Fresh AIR Makeup VentFull Open or Closed Positions Air Sampling for Carbon Dioxide CO2 LevelRefrigeration Circuit with Receiver 10. Refrigeration Circuit with Receiver 268-07 Water-Cooled Condenser with Condenser Fan Switch CFS Water--Cooled Condenser with Water Pressure Switch WPWATER-COOLED Condenser Optional Section Suction Solenoid Override Suction Solenoid ValveOperation Remote Monitoring OptionalSafety and Protective Devices Safety and Protective DevicesUnsafe Condition Safety Device Device Setting MICRO-LINK 2i Controller Module Micro-Link 2i Controller/DataCORDER Module Brief DescriptionOperational Software Procedure for loading softwareConfiguration Software Controller Programming Memory CardsController Configuration Variables Configuration Title Default Option NumberGeneral Layout of the Controller Section KEY FunctionDisplay Module Code Title Description Controller Function CodesController Function Code Assignments Inapplicable Functions DisplayCPC Variable option 34 is set to F refer to Table Code Title Description Controller Alarms Model 69NT40-511-72 Controller Alarm IndicationsALL Models Check for recharging or replacing battery pack ERR Error DescriptionMicroprocessor Controller Temperature Control Condenser Pressure Control CPCSection Operation in the economy mode Code 34 set to on PRE-TRIP Diagnostics PRE-TRIP Selection Menu Pre-Trip Test Codes Pre-Trip ModeTitle Description Component Normal Logic Crel 3 minutes SecondsCrel Component Normal LogicSeconds Minutes Addition, this test is skipped if Addition, the test will fail ifFail Integrated Datacorder Optional DataCORDER Configuration ConfigurationSetting Factory Default DataCORDER Function Codes Code # Title DescriptionDataCORDER Alarms DataCORDER Alarm Indications DataCORDER Alarm Configurations Description Selection Access to DataCORDER FunctionsStandard Mode Generic ModeDataCorder Standard Configuration Description Tion Usda Recording USDA/ Message Trip CommentPre-Trip Data Recording Usda Cold Treatment Procedure DataCORDER Scrollback10. DataCORDER Pre-Trip Data Test # Title DataStandard Configuration Report Sample SET Point Falling Rising TemperatureCooling AIRStep YESCompressor Cycles OFF Operation PRE-TRIP Inspection Before StartingAfter Starting Inspection Units equipped with the integrated DataCORDERStarting and Stopping Instructions Unit OperationController Set Above --10C +14F, or --5C +23F optionally Defrost indicator will remain on throughout this periodProbe Check Cooling in High Speed with Two-Speed Compressor See Figure268-07 Control Transformer Cooling in High Speed with Two-Speed CompressorCooling in Low Speed with Two-Speed Compressor See Figure Cooling in Low Speed with Two-Speed Compressor 268-07 Cooling with Single-Speed Compressor See Figure Cooling with Single-Speed Compressor 268-07 Heating See Figure Heating Mode 268-07 Defrost Snap Freeze OptionArctic = 18 Volt Energized Circuit = De-energized Circuit Holding Zone Two-Speed CompressorHolding Zone Unit Runs but has Insufficient Cooling Unit Operates Long or Continuously in CoolingUnit will not Terminate Heating RemedyUnit will not Defrost Properly Abnormal Noise or Vibrations Temperature Controller MalfunctionNo Evaporator AIR Flow or Restricted AIR Flow Power Autotransformer Malfunction WATER-COOLED Condenser or Water Pressure SwitchOpened Manifold Gauge SETClosed Removing the Manifold Gauge Set Blue Hose To Discharge Service orPort Blue KnobPumping the Unit Down Suction and Discharge Service ValvesRefrigerant Leak Checking Evacuation and Dehydration Refrigerant Charge268-07 Vacuum Pump Connections Adding Refrigerant to System Partial Charge Adding Refrigerant to System Full ChargeCompressor -- Model 06DR Turn off valves on both hoses to pump Compressor Disassembly10 9 8 Jack here Exploded View of Valve PlateOil Pump and Bearing Head Low Profile Gear Oil Pump11. Crankshaft Assembly Compressor Reassembly Compression RingsCompressor OIL Level Adding Oil to Service Replacement CompressorIf compressor is without oil To Check the Oil Level in the CompressorTo Replace Filter-Drier High Pressure SwitchTo Check Filter-Drier FILTER-DRIERTo disassemble the Evaporator Fan Assembly To Replace the Evaporator Fan AssemblyTo Replace the Evaporator Coil Evaporator FAN Motor Capacitors To assemble the Evaporator Fan AssemblyWhen to check for a defective capacitor Removing the capacitorTo Replace Condenser Coil Condenser FAN and Motor AssemblyCapacitor analyzer Condenser CoilUnit Running OhmmeterUnit Off Saginomiya Recording Thermometer BatteryTo replace the recording thermometer element CalibrationSensor Checkout Procedure AMBS, DTS, RRS, RTS, SRS & STS Maintenance of Painted SurfacesPower Autotransformer Optional Replacing Sensor ProbeReplacing Sensor STS and SRS RTS or STSRRS or SRS OLD Style Probe HolderSensor Cable Heat Shrink Large Heat Shrink Tubing Sensor Mm 1-5/8 inches 35 mm 1/4 inchReplacing Sensor RRS and RTS Sensor 25.4 mm 1.0 inch Mounting Stud 35mm 1/4 inch Ambs or DTSReplacing Sensor Ambs or DTS Sensor Crimp Fitting Heat Shrink Crimp FittingTubingReplacing the Coil Coil Checkout ProcedureSuction Solenoid Valve SSV Replacing Valve Internal Parts -- Alco See FigureThermostatic Expansion Valve Ambient Temperature Cold CoilTo Replace Valve Removing Expansion Valve See FigureInstalling Expansion Valve To Measure SuperheatCONTROLLER/DATACORDER Removing and Installing the Controller/DataCORDER ModuleRemoval Handling of Controller/DataCORDERProcedure for loading Configuration Software InstallationProcedure for loading Operational Software Controller/DataCORDER Programming ProcedureSummary of Procedure What You Will NeedReturn Detailed ProcedurePump Fine mesh Support Screen What You Can Do For Further Help Partlow Bulb Temperature-Resistance ChartTemperature Resistance Ohms Ambs and DTSNonfree Spinning Locknuts ETC Recommended Bolt Torque ValuesBolt DIA Threads Torque MKG Free Spinning Wear Limits For CompressorsCompressor Torque Values Temperature Pressure 35F 1.7C Box 0F --17.8C Box35F 1.7C Box 0F --17.8C Box Ambient Air Temperature35 F 1.7 C Box 17.8 C Box Please Refer to File Diagrams For Schematics and Diagrams Index Index-1 268-07Index-2 Index-3 268-07 Index-4 Index-5 268-07 Index-6