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Carrier
manual 52S SERIES
Models:
52S
1
44
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Troubleshooting
Install
Field Temperature Charts
Compressor Replacement
Symptom
General Disassembly
Non-Useradjustable Switches
General Cleaning
Ð Temperature Limiter
No, only for use on remote control RC models
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Image 44
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52S SERIES
FIGURE 76 Ð 52S 12,000 BTU UNIT FIELD TEMPERATURE CHART Ð HIGH COOL Ð 50% RH
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Contents
CONTENTS
52S SERIES
SERVICE TECHNICIAN GUIDE
PACKAGED TERMINAL AIR CONDITIONERS AND HEAT PUMPS
INTRODUCTION
SUMMARY OF DANGERS, WARNINGS, AND CAUTIONS
FIGURE 1 Ð REMOVING FRONT PANEL
52S SERIES
FIGURE 2 Ð MODEL NUMBER NOMENCLATURE
FIGURE 3 Ð SAMPLE DATA INFORMATION PLATE
GENERAL DISASSEMBLY
TO DISCONNECT POWER FOR CORD- CONNECTED UNIT
TO OPEN THE CONTROL BOX
TO REMOVE THE UNIT FROM THE WALL SLEEVE
WITH THE LATERAL DUCT ACCESSORY PACKAGE
TO REMOVE THE LATERAL DUCT
EXTENSION, FOR UNITS EQUIPPED
FIGURE 7 Ð DUCT EXTENSION SCREWS
TO ACCESS INDOOR-AIRSECTION COMPONENTS
LATERAL DUCT ACCESSORY PACKAGE
FIGURE 11 Ð DISCHARGE PLENUM ASSEMBLY
DISASSEMBLING THE LATERAL DUCT
TO REMOVE THE AIR DISCHARGE GRILLE
FIGURE 14 Ð REMOVING AIR DISCHARGE GRILLE
TO REMOVE THE ALUMINUM TOP PANEL
FIGURE 15 Ð ALUMINUM TOP PANEL
TO ACCESS OUTDOOR-AIRSECTION COMPONENTS
TO REMOVE THE DISCHARGE DECK
TO REMOVE THE GUSSET
FIGURE 17 Ð DISCHARGE DECK REMOVAL
FIGURE 20 Ð REMOVING STATOR
STATOR CONDENSER ORIFICE CONDENSER COIL
GENERAL CLEANING
CLEANING AND SAFETY
COMPONENT CLEANING SCHEDULE
FIGURE 21 Ð FRONT PANEL, CHASSIS, AND SLEEVE
MONTHLY CLEANING
CLEANING THE INDOOR AIR FILTER Ð Remove
REPLACING THE INDOOR AIR FILTER Ð Access
TOOLS NEEDED
CLEANING THE VENT AIR FILTER
FIGURE 23 Ð ACCESSING VENT AIR FILTER
REPLACING THE VENT AIR FILTER
CHASSIS
SEASONAL CLEANING
ACCESSING THE INDOOR AND OUTDOOR
1.DISCONNECT ALL POWER TO UNIT
FIGURE 25 Ð SIDE ANGLE SCREWS
CLEANING THE INDOOR AND OUTDOOR COILS
Coils section ACCESSING THE INDOOR FAN AND INDOOR
FIGURE 28 Ð CLEANING THE COILS
Section Components on page
CLEANING THE INDOOR FAN AND FAN
ACCESSING THE HEATER ASSEMBLY Ð To access
1.DISCONNECT ALL POWER TO THE UNIT
CLEANING THE HEATER ASSEMBLY Ð Once the
52S SERIES
COMPRESSOR
FIGURE 32 Ð ROTARY COMPRESSOR COMPONENTS
COMPRESSOR TROUBLESHOOTING
BASIC HERMETIC COMPRESSOR ELECTRICAL MEASUREMENTS
FIGURE 33 Ð ROTARY COMPRESSOR COMPRESSION PROCESS
1.DISCONNECT ALL POWER TO THE UNIT
SYMPTOM
52S SERIES
FIGURE 36 Ð GROUNDED WINDINGS TEST
COMPRESSOR REPLACEMENT
FIGURE 35 Ð SHORTED/OPEN WINDINGS TEST
1.Disconnect all power to unit
REMOVING THE COMPRESSOR Ð Follow the steps
FIGURE 37 Ð STRAINER AND LIQUID TUBE
FIGURE 38 Ð TUBE INSERTED STRAINER
FIGURE 40 Ð SUCTION LINE FILTER DRIER
FIGURE 39 Ð INSTALLED FILTER DRIER
REFRIGERANT CHARGING Ð Every mechanical
Consider the following safety issues
Power
Assembly 1.DISCONNECT ALL POWER TO UNIT
FIGURE 41 Ð LIMIT SWITCH LOCATION
FIGURE 44 Ð ACCEPTABLE HEATER RESISTANCE VALUES
FIGURE 42 Ð REMOVING HEATER SCREWS
FIGURE 43 Ð HEATER REMOVED
OPERATING CONTROLS
FIGURE 45 Ð TYPICAL 52S UNIT OPERATING CONTROLS
FIGURE 46 Ð MANUAL THERMOSTAT
FIGURE 47 Ð PROGRAMMABLE THERMOSTAT
DESCRIPTION OF SWITCH SETTINGS
NON-USERADJUSTABLE SWITCHES
HIGH HEAT OR HIGH COOL Ð Push button and
OUTSIDE OR VENT AIR Ð Push the FAN ONLY
FIGURE 50 Ð SELECTOR SWITCH CONTACTS
FIGURE 51 Ð SELECTOR SWITCH CONTACTS
FIGURE 52 Ð SELECTOR SWITCH CONTACTS
SEQUENCE OF OPERATION
COMPONENT OPERATION AND TROUBLESHOOTING
TOOLS NEEDED
INDOOR THERMOSTAT Heat Pump Units
Consider the following safety issues
OUTDOOR FROST THERMOSTAT Heat Pump Units
FIGURE 55 Ð OUTDOOR FROST THERMOSTAT OFT
CONTACTS, ALL 52SQ AA AND CP MODELS
LEGEND Figures
FIGURE 56 Ð CAPACITOR TEST
FIGURE 57 Ð FAN CYCLE SWITCH 3 Terminal
LOCKED OUT
ELECTRICAL COMPONENTS REMOVAL AND REPLACEMENT
FIGURE 59 Ð TEMPERATURE LIMITER
FIGURE 60 Ð OUTDOOR FROST THERMOSTAT SCREWS
FIGURE 58 Ð ESCUTCHEON REMOVAL
FIGURE 61 Ð COMPONENT LOCATIONS
IN OPEN CONTROL BOX
FAN MOTOR TROUBLESHOOTING
FAN MOTOR
BASIC FAN MOTOR ELECTRICAL TESTS
FIGURE 62 Ð TWO-SPEED,PERMANENT
FIGURE 63 Ð FAN MOTOR TROUBLESHOOTING CHART
TYPICAL 208/230 VOLT MOTORS
TYPICAL 265 VOLT MOTORS
FIGURE 64 Ð TYPICAL 52S FAN MOTORS
FAN MOTOR REPLACEMENT
Removal
FIGURE 65 Ð SPRING CLIP
FIGURE 66 Ð REMOVING OUTDOOR FAN FROM MOTOR SHAFT
FIELD TEMPERATURE CHARTS
See Figures 67 - 82 for eld temperature data
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WIRING SCHEMATICS
located next to the unit control box
52S SERIES
Ð Capacitor
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52S SERIES
Ð Capacitor
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MOST FREQUENT PTAC SERVICE QUESTIONS
No, only for use on remote control RC models
By using a slinger ring to evaporate the water on
the outdoor coil, and by using an optional acces
