Carrier manual Wiring Schematic 52SQ Ð 208/230 V and 265 V AA and CP Units

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52S

SERIES

CAP	Ð Capacitor
COMP	Ð Compressor
FCS	Ð Fan Cycle Switch
FM	Ð Fan Motor
HTR	Ð Heater
IT	Ð Indoor Thermostat

LÐ Power Supply Line

OL	Ð Overload
PL	Ð Plug
PLS	Ð Primary Limit Switch
RVS	Ð Reversing Valve Solenoid
SLS	Ð Secondary Limit Switch

LEGEND

ST Ð Start Thermistor

SW Ð Switch

Component Connection (Marked)

Component Connection (Unmarked)

Accessory or Optional Wiring Factory Wiring

To Indicate Common Potential Only. Not to Represent Wire

SWITCH		CONTACTS MADE
POSITION		CONTACTS MADE
POSITION
OFF	NONE
FAN	L1	TO LO*
LO HEAT	L1	TO IT1, FCS TO LO, L2 TO HTR
HI HEAT	L1	TO IT1, FCS TO HI, L2 TO HTR
LO COOL	L1	TO IT3, FCS TO LO
HI COOL	L1	TO IT3, FCS TO HI

*L1 to MED, some models.

NOTES:

1.Recommended for use on grounded power supply only.

2.Compressor and fan motor thermally protected.

3.Use copper conductors only.

4.All wiring must conform with NEC (National Electrical Code) and local codes.

5.Dashed lines indicate components when used.

FIGURE 86 Ð WIRING SCHEMATIC; 52SQ Ð 208/230 V AND 265 V AA AND CP UNITS

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Contents Service Technician Guide ContentsIntroduction Summary of DANGERS, WARNINGS, and CautionsModel Number Nomenclature To Open the Control BOX General DisassemblyTo Disconnect Power for CORD- Connected Unit To Remove the Unit from the Wall SleeveDuct Extension Screws To Access INDOOR-AIR Section Components Removing the AIR BaffleTo Remove the AIR Discharge Grille To Remove the TOP Cover Ð Remove the screwTo Access OUTDOOR-AIR Section Components To Remove the Discharge DeckTo Remove the Gusset Removing Stator Component Cleaning Schedule General CleaningCleaning and Safety Consider the following safety issues before beginningReplacing the Indoor AIR Filter Ð Access Monthly CleaningCleaning the Indoor AIR Filter Ð Remove Tools NeededCleaning the Vent AIR Filter Replacing the Vent AIR FilterChassis Seasonal Cleaning Accessing the Indoor and OutdoorDisconnect ALL Power to Unit Coils section Cleaning the Indoor and Outdoor CoilsAccessing the Indoor FAN and Indoor Section Components onCleaning the Indoor FAN and FAN Disconnect ALL Power to the UnitCleaning the Heater Assembly Ð Once Compressor Rotary Compressor ComponentsCompressor Troubleshooting Basic Hermetic Compressor Electrical MeasurementsBasic Compressor Troubleshooting Guide Compressor Replacement SHORTED/OPEN Windings TestDisconnect all power to unit Removing the Compressor Ð Follow the stepsInstalled Filter Drier Refrigerant Charging Ð Every mechanicalHeaters Common Causes Heater FailureHeater Removal Removing Heater Screws Operating Controls Typical 52S Unit Operating ControlsHigh Heat or High Cool Ð Push button Description of Switch SettingsNON-USER Adjustable Switches Outside or Vent AIR Ð Push the FAN onlyCooling only Units Figure Sequence of OperationHEAT/COOL Units Figure Heat Pump Units FigureComponent Operation and Troubleshooting Tools NeededIndoor Thermostat Heat Pump Units Indoor Thermostat IT CONTACTS, ALL 52SQ AA and CP Models Outdoor Frost Thermostat Heat Pump UnitsLocked OUT Capacitor TestElectrical Components Removal and Replacement Outdoor Frost Thermostat ScrewsComponent Locations Open Control BOX FAN Motor Troubleshooting FAN MotorBasic FAN Motor Electrical Tests FAN Motor Troubleshooting Chart Typical 208/230 Volt Motors Typical 265 Volt MotorsFAN Motor Replacement RemovalField 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 Schematics Wiring Schematic 52SC Ð 208/230 V and 265 V AA and CP UnitsWiring 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