Carrier 50TCA04-A07 appendix Cooling Service Analysis, Problem Cause Remedy

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50TC

Table 1 – Cooling Service Analysis

PROBLEM

CAUSE

REMEDY

 

Power failure.

Call power company.

 

 

 

 

Fuse blown or circuit breaker tripped.

Replace fuse or reset circuit breaker.

 

 

 

Compressor and Condenser

Defective thermostat, contactor, transformer,

Replace component.

or control relay.

Fan Will Not Start.

 

 

 

Insufficient line voltage.

Determine cause and correct.

 

 

 

 

 

Incorrect or faulty wiring.

Check wiring diagram and rewire correctly.

 

 

 

 

Thermostat setting too high.

Lower thermostat setting below room temperature.

 

Faulty wiring or loose connections in compres-

Check wiring and repair or replace.

 

sor circuit.

 

 

 

 

 

 

Compressor motor burned out, seized, or

Determine cause. Replace compressor.

Compressor Will Not Start But

internal overload open.

 

Condenser Fan Runs.

 

 

Defective run/start capacitor, overload, start

Determine cause and replace.

 

relay.

 

 

 

 

 

 

One leg of three--- phase power dead.

Replace fuse or reset circuit breaker. Determine

 

cause.

 

 

 

 

 

 

Refrigerant overcharge or undercharge.

Recover refrigerant, evacuate system, and recharge

 

to nameplate.

 

 

 

 

 

 

Defective compressor.

Replace and determine cause.

 

 

 

Compressor Cycles (other

Insufficient line voltage.

Determine cause and correct.

 

 

Blocked condenser.

Determine cause and correct.

than normally satisfying ther-

 

 

Defective run/start capacitor, overload, or start

 

mostat).

Determine cause and replace.

relay.

 

 

 

 

 

 

Defective thermostat.

Replace thermostat.

 

 

 

 

Faulty condenser--- fan motor or capacitor.

Replace.

 

 

 

 

Restriction in refrigerant system.

Locate restriction and remove.

 

Dirty air filter.

Replace filter.

 

 

 

 

Unit undersized for load.

Decrease load or increase unit size.

 

 

 

Compressor Operates

Thermostat set too low.

Reset thermostat.

 

 

Low refrigerant charge.

Locate leak; repair and recharge.

Continuously.

 

 

Leaking valves in compressor.

Replace compressor.

 

 

Air in system.

Recover refrigerant, evacuate system, and recharge.

 

 

 

 

Condenser coil dirty or restricted.

Clean coil or remove restriction.

 

 

 

 

Dirty air filter.

Replace filter.

 

Dirty condenser coil.

Clean coil.

Excessive Head Pressure.

 

 

Refrigerant overcharged.

Recover excess refrigerant.

 

 

 

 

Air in system.

Recover refrigerant, evacuate system, and recharge.

 

Condenser air restricted or air short--- cycling.

Determine cause and correct.

 

 

 

 

Low refrigerant charge.

Check for leaks; repair and recharge.

Head Pressure Too Low.

 

 

Compressor valves leaking.

Replace compressor.

 

 

 

 

Restriction in liquid tube.

Remove restriction.

 

 

 

 

High head load.

Check for source and eliminate.

Excessive Suction Pressure.

 

 

Compressor valves leaking.

Replace compressor.

 

 

 

 

Refrigerant overcharged.

Recover excess refrigerant.

 

 

 

 

Dirty air filter.

Replace filter.

 

Low refrigerant charge.

Check for leaks; repair and recharge.

 

 

 

 

Metering device or low side restricted.

Remove source of restriction.

Suction Pressure Too Low.

 

 

Insufficient evaporator airflow.

Increase air quantity. Check filter and replace if

 

necessary.

 

 

 

 

 

 

Temperature too low in conditioned area.

Reset thermostat.

 

 

 

 

Outdoor ambient below 25˚F.

Install low--- ambient kit.

 

 

 

Evaporator Fan Will Not Shut

Time off delay not finished.

Wait for 30--- second off delay.

Off.

 

 

 

 

 

Compressor Makes Excessive

Compressor rotating in wrong direction.

Reverse the 3--- phase power leads.

Noise.

 

 

 

 

 

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Contents Table of Contents Safety ConsiderationsUnit Arrangement and Access Routine MaintenanceSeasonal Maintenance GeneralSupply FAN Blower Section Supply Fan Belt-DriveAdjustable-Pitch Pulley on Motor Supply-Fan Pulley Adjustment BearingsCondenser Coil Maintenance and Cleaning Recommendation CoolingCondenser Coil Cleaning Condenser Coil Two-Row CoilsRefrigerant System Pressure Access Ports Puronr R-410A RefrigerantEvaporator Coil Refrigerant ChargeTo Use Cooling Charging Charts CoreMax Access Port AssemblyCooling Charging Charts Cooling Charging ChartsCooling Charging Charts Troubleshooting Cooling System CompressorFilter Drier Condenser-Fan LocationCooling Service Analysis Problem Cause RemedyConvenience Outlets Smoke DetectorsSystem ControllerSensor Completing Installation of Return Air Smoke Sensor Smoke Detector LocationsFiop Smoke Detector Wiring and Response Return Air Sensor Operating PositionSensor and Controller Tests Sensor Alarm Test Controller Alarm TestDirty Controller Test Dirty Sensor TestDetector Cleaning Remote Test/Reset Station Dirty Sensor TestCleaning the Smoke Detector Changing the Dirt Sensor TestIndicators Alarm StateDetector Indicators Control or Indicator DescriptionTroubleshooting Protective DevicesElectric Heaters Relief DeviceControl Circuit Condenser Fan Motor ProtectionCompleting Heater Installation Typical Single Point InstallationPremierlinkt Control PremierLink ControllerPremierLink Wiring Schematic 55 Space Temperature Sensor Wiring Temp ResistanceTemperature Enthalpy Sensor PremierLink Sensor UsageOutdoor AIR Return AIR Space Sensor Mode Thermostat ModeField Connection Input Signal TB1 Terminal Field Connection Input SignalLctb Outside and Return Air Enthalpy Sensor Wiring Indoor CO2 Sensor 33ZCSENCO2 Connec TionsCCN BUS Wire CCN Plug PIN Color Number Recommended CablesColor Code Recommendations ManufacturerEconomizer Systems PremierLink CCN Bus ConnectionsInputs Outputs RUNSupply Air Temperature SAT Sensor EconoMi$erOutdoor Air Lockout Sensor EconoMi$er IV Control ModesDifferential Dry Bulb Control Outdoor Enthalpy ChangeoverEnthalpy Changeover Setpoints Indoor Air Quality IAQ Sensor InputExhaust Setpoint Adjustment Minimum Position ControlDamper Movement ThermostatsCO2 Sensor Configuration Demand Control Ventilation DCVEconoMi$er IV Sensor Usage DCV Demand Controlled Ventilation and Power Exhaust EconoMi$er IV PreparationDifferential Enthalpy Single EnthalpyWiring Diagrams EconoMi$er IV Troubleshooting CompletionPRE-START-UP START-UP, General START-UP, Premierlink ControlsMemory Reset Perform System Check-OutInitial Operation and Test Operating Sequence, Base Unit ControlsOperating Sequence, PremierLink Control 50TC Available Cooling Stages Number Stages EconomizerOAT ≤ SPT 50TC 50TC Loadshed Command Gas and Electric Heat Units Fastener Torque ValuesLinkage Modes 50TC Typical Unit Wiring diagram Power A06 Torque Values50TC Unit Wiring Diagram Control A06 Appendix I. Model Number Significance Model Number NomenclatureSerial Number Format Position Number Typical DesignatesAppendix II. Physical Data Physical Data Cooling TonsAppendix III. FAN Performance General Fan Performance NotesTon Horizontal Supply Ton Vertical SupplyCFM RPM BHP Standard Static Option 5541170 1165 12251215 120650TC**05 Phase Ton Horizontal Supply 724 765Phase Ton Horizontal Supply 822 927 1018 872 973 1061923 1019 974 1067Pulley Adjustment Unit MOTOR/DRIVE Motor Pulley Turns Open ComboAppendix IV. Electrical Data Appendix IV. Electrical Data FLAMCA/MOCP Determination no C.O. or Unpwrd C.O MCA/MOCP Determination no C.O. or Unpwrd C.O. 78/89152 159 Appendix V. Wiring Diagram List Wiring DiagramsAppendix VI. Motormaster Sensor Locations 50TC*A04 Outdoor CircuitingAppendix VI. cont Motormaster Sensor Locations Catalog No 50TC---1SM START-UP Checklist Pressures Cooling ModeRemove and Store in Job File

50TCA04-A07 specifications

The Carrier 50TCA04-A07 is a prominent model from Carrier, a leader in the heating, ventilation, and air conditioning (HVAC) industry. Designed for commercial applications, this unit exemplifies advanced technology and reliability, catering to a wide array of cooling needs.

One of the most notable features of the Carrier 50TCA04-A07 is its high efficiency. With a cooling capacity that suits various settings, it is engineered to provide excellent performance with minimal energy consumption. The unit achieves impressive Seasonal Energy Efficiency Ratio (SEER) ratings, which not only reduce operational costs but also lower the environmental impact.

The Carrier 50TCA04-A07 employs state-of-the-art inverter technology. This innovation allows the compressor to operate at varying speeds, adjusting its output according to the cooling demand. Consequently, the system can maintain optimal comfort levels while using less energy. Additionally, the inverter technology contributes to quieter operation, making it a suitable choice for environments where noise is a concern.

Durability is a hallmark of the Carrier 50TCA04-A07. Constructed with robust materials, this model is designed to withstand harsh conditions and ensure long-term reliability. The unit is equipped with corrosion-resistant components, extending its lifespan and maintaining performance quality over time.

Another significant characteristic of the Carrier 50TCA04-A07 is its advanced control system. The integrated control panel provides easy access to performance settings and monitoring capabilities. Users can effortlessly adjust temperatures and modes, ensuring a customizable climate. Furthermore, compatibility with smart building management systems enhances operational efficiency and real-time monitoring.

Regarding safety features, the Carrier 50TCA04-A07 is equipped with multiple sensors and automated responses to prevent overheating and ensure safe operation. These safety mechanisms not only protect the unit but also contribute to the overall safety of the installation environment.

In summary, the Carrier 50TCA04-A07 is a highly efficient, durable, and technologically advanced HVAC solution for commercial spaces. Its innovative features, including inverter technology, robust construction, and smart control systems, set it apart in the market, making it a reliable choice for businesses seeking to optimize their climate control needs while minimizing energy consumption and operational costs.
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