Carrier 52S manual Component Locations Open Control BOX

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CAPACITOR Ð To remove the capacitor, perform the following steps:

1.Turn off unit power as described in GENERAL DISASSEMBLY section.

2.Open the control box (Figure 61) as detailed in the GENERAL DISASSEMBLY section of this manual.

3.Properly discharge the capacitor as described in the Capacitor section under Component Operation and Troubleshooting.

4.Remove the leads to the capacitor. Note the wire loca- tions to ease re-assembly.

5.Close the control box door and remove the screw hold- ing the capacitor.

6.Open the control box door and remove capacitor.

7.Reverse Steps 1 - 6 to reinstall.

FIGURE 61 Ð COMPONENT LOCATIONS

IN OPEN CONTROL BOX

FAN CYCLE SWITCH Ð The fan cycle switch is lo- cated on the right side of the control box. To remove the fan cycle switch, perform the following steps:

1.Turn off unit power as described in GENERAL DISASSEMBLY section.

2.Open the control box as described in GENERAL DISASSEMBLY section of this manual.

3.Remove the 3 wires from the fan cycle switch. See Figure 61 for location.

4.Push the snaps of the switch housing toward the switch with a pair of pliers or small screwdriver. Gently push the switch out of the housing.

5.Reverse Steps 1 - 4 to reinstall.

SELECTOR SWITCH Ð To remove the selector switch from the unit, perform the following steps:

1.Turn off unit power as described in GENERAL DISASSEMBLY section.

2.Remove thermostat knob and unit escutcheon. See Figure 58.

3.Open control box as described in the GENERAL DISASSEMBLY section of this manual.

4.Remove all the wires to the selector switch. Label wires to simplify re-assembly.

5.Remove the 2 screws mounting the switch and re- move switch. See Figure 61.

6.Reverse Steps 1 - 5 to reinstall.

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Contents Contents Service Technician GuideSummary of DANGERS, WARNINGS, and Cautions IntroductionModel Number Nomenclature To Remove the Unit from the Wall Sleeve General DisassemblyTo Disconnect Power for CORD- Connected Unit To Open the Control BOXDuct Extension Screws Removing the AIR Baffle To Access INDOOR-AIR Section ComponentsTo Remove the TOP Cover Ð Remove the screw To Remove the AIR Discharge GrilleTo Remove the Discharge Deck To Access OUTDOOR-AIR Section ComponentsTo Remove the Gusset Removing Stator Consider the following safety issues before beginning General CleaningCleaning and Safety Component Cleaning ScheduleTools Needed Monthly CleaningCleaning the Indoor AIR Filter Ð Remove Replacing the Indoor AIR Filter Ð AccessReplacing the Vent AIR Filter Cleaning the Vent AIR FilterChassis Accessing the Indoor and Outdoor Seasonal CleaningDisconnect ALL Power to Unit Section Components on Cleaning the Indoor and Outdoor CoilsAccessing the Indoor FAN and Indoor Coils sectionDisconnect ALL Power to the Unit Cleaning the Indoor FAN and FANCleaning the Heater Assembly Ð Once Rotary Compressor Components CompressorBasic Hermetic Compressor Electrical Measurements Compressor TroubleshootingBasic Compressor Troubleshooting Guide SHORTED/OPEN Windings Test Compressor ReplacementRemoving the Compressor Ð Follow the steps Disconnect all power to unitRefrigerant Charging Ð Every mechanical Installed Filter DrierCommon Causes Heater Failure HeatersHeater Removal Removing Heater Screws Typical 52S Unit Operating Controls Operating ControlsOutside or Vent AIR Ð Push the FAN only Description of Switch SettingsNON-USER Adjustable Switches High Heat or High Cool Ð Push buttonHeat Pump Units Figure Sequence of OperationHEAT/COOL Units Figure Cooling only Units FigureTools Needed Component Operation and TroubleshootingIndoor Thermostat Heat Pump Units Outdoor Frost Thermostat Heat Pump Units Indoor Thermostat IT CONTACTS, ALL 52SQ AA and CP ModelsCapacitor Test Locked OUTOutdoor Frost Thermostat Screws Electrical Components Removal and ReplacementComponent Locations Open Control BOX FAN Motor FAN Motor TroubleshootingBasic FAN Motor Electrical Tests Typical 265 Volt Motors FAN Motor Troubleshooting Chart Typical 208/230 Volt MotorsRemoval FAN Motor ReplacementField Temperature Charts 52S Series Page 52S Series Page 52S Series Page 52S Series Page 52S Series Page 52S Series Page 52S Series Page 52S Series Wiring Schematic 52SC Ð 208/230 V and 265 V AA and CP Units Wiring SchematicsWiring Schematic 52SE Ð 208/230 V and 265 V AA and CP Units Wiring Schematic 52SE Ð 208/230 V and 265 V RC Units Wiring Schematic 52SQ Ð 208/230 V and 265 V AA and CP Units Wiring Schematic 52SQ Ð 208/230 V and 265 V RC Units Most Frequent Ptac Service Questions