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Carrier
52S manual
Models:
52S
1
37
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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 37
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FIGURE 69 Ð 52S 7,000 BTU UNIT FIELD TEMPERATURE CHART, LOW HEAT MODE (47 F OUTDOOR TEMPERATURE)
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Image 37
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Contents
52S SERIES
CONTENTS
SERVICE TECHNICIAN GUIDE
PACKAGED TERMINAL AIR CONDITIONERS AND HEAT PUMPS
SUMMARY OF DANGERS, WARNINGS, AND CAUTIONS
INTRODUCTION
FIGURE 1 Ð REMOVING FRONT PANEL
52S SERIES
FIGURE 3 Ð SAMPLE DATA INFORMATION PLATE
FIGURE 2 Ð MODEL NUMBER NOMENCLATURE
TO DISCONNECT POWER FOR CORD- CONNECTED UNIT
GENERAL DISASSEMBLY
TO OPEN THE CONTROL BOX
TO REMOVE THE UNIT FROM THE WALL SLEEVE
TO REMOVE THE LATERAL DUCT
WITH THE LATERAL DUCT ACCESSORY PACKAGE
EXTENSION, FOR UNITS EQUIPPED
FIGURE 7 Ð DUCT EXTENSION SCREWS
LATERAL DUCT ACCESSORY PACKAGE
TO ACCESS INDOOR-AIRSECTION COMPONENTS
FIGURE 11 Ð DISCHARGE PLENUM ASSEMBLY
DISASSEMBLING THE LATERAL DUCT
FIGURE 14 Ð REMOVING AIR DISCHARGE GRILLE
TO REMOVE THE AIR DISCHARGE GRILLE
TO REMOVE THE ALUMINUM TOP PANEL
FIGURE 15 Ð ALUMINUM TOP PANEL
TO REMOVE THE DISCHARGE DECK
TO ACCESS OUTDOOR-AIRSECTION COMPONENTS
TO REMOVE THE GUSSET
FIGURE 17 Ð DISCHARGE DECK REMOVAL
STATOR CONDENSER ORIFICE CONDENSER COIL
FIGURE 20 Ð REMOVING STATOR
CLEANING AND SAFETY
GENERAL CLEANING
COMPONENT CLEANING SCHEDULE
FIGURE 21 Ð FRONT PANEL, CHASSIS, AND SLEEVE
CLEANING THE INDOOR AIR FILTER Ð Remove
MONTHLY CLEANING
REPLACING THE INDOOR AIR FILTER Ð Access
TOOLS NEEDED
FIGURE 23 Ð ACCESSING VENT AIR FILTER
CLEANING THE VENT AIR FILTER
REPLACING THE VENT AIR FILTER
CHASSIS
ACCESSING THE INDOOR AND OUTDOOR
SEASONAL CLEANING
1.DISCONNECT ALL POWER TO UNIT
FIGURE 25 Ð SIDE ANGLE SCREWS
Coils section ACCESSING THE INDOOR FAN AND INDOOR
CLEANING THE INDOOR AND OUTDOOR COILS
FIGURE 28 Ð CLEANING THE COILS
Section Components on page
ACCESSING THE HEATER ASSEMBLY Ð To access
CLEANING THE INDOOR FAN AND FAN
1.DISCONNECT ALL POWER TO THE UNIT
CLEANING THE HEATER ASSEMBLY Ð Once the
FIGURE 32 Ð ROTARY COMPRESSOR COMPONENTS
COMPRESSOR
52S SERIES
BASIC HERMETIC COMPRESSOR ELECTRICAL MEASUREMENTS
COMPRESSOR TROUBLESHOOTING
FIGURE 33 Ð ROTARY COMPRESSOR COMPRESSION PROCESS
1.DISCONNECT ALL POWER TO THE UNIT
52S SERIES
SYMPTOM
FIGURE 35 Ð SHORTED/OPEN WINDINGS TEST
COMPRESSOR REPLACEMENT
FIGURE 36 Ð GROUNDED WINDINGS TEST
REMOVING THE COMPRESSOR Ð Follow the steps
1.Disconnect all power to unit
FIGURE 37 Ð STRAINER AND LIQUID TUBE
FIGURE 38 Ð TUBE INSERTED STRAINER
REFRIGERANT CHARGING Ð Every mechanical
FIGURE 39 Ð INSTALLED FILTER DRIER
FIGURE 40 Ð SUCTION LINE FILTER DRIER
Power
Consider the following safety issues
Assembly 1.DISCONNECT ALL POWER TO UNIT
FIGURE 41 Ð LIMIT SWITCH LOCATION
FIGURE 43 Ð HEATER REMOVED
FIGURE 42 Ð REMOVING HEATER SCREWS
FIGURE 44 Ð ACCEPTABLE HEATER RESISTANCE VALUES
FIGURE 45 Ð TYPICAL 52S UNIT OPERATING CONTROLS
OPERATING CONTROLS
FIGURE 46 Ð MANUAL THERMOSTAT
FIGURE 47 Ð PROGRAMMABLE THERMOSTAT
NON-USERADJUSTABLE SWITCHES
DESCRIPTION OF SWITCH SETTINGS
HIGH HEAT OR HIGH COOL Ð Push button and
OUTSIDE OR VENT AIR Ð Push the FAN ONLY
FIGURE 51 Ð SELECTOR SWITCH CONTACTS
FIGURE 50 Ð SELECTOR SWITCH CONTACTS
FIGURE 52 Ð SELECTOR SWITCH CONTACTS
SEQUENCE OF OPERATION
TOOLS NEEDED
COMPONENT OPERATION AND TROUBLESHOOTING
INDOOR THERMOSTAT Heat Pump Units
Consider the following safety issues
FIGURE 55 Ð OUTDOOR FROST THERMOSTAT OFT
OUTDOOR FROST THERMOSTAT Heat Pump Units
CONTACTS, ALL 52SQ AA AND CP MODELS
LEGEND Figures
LOCKED OUT
FIGURE 57 Ð FAN CYCLE SWITCH 3 Terminal
FIGURE 56 Ð CAPACITOR TEST
FIGURE 59 Ð TEMPERATURE LIMITER
ELECTRICAL COMPONENTS REMOVAL AND REPLACEMENT
FIGURE 60 Ð OUTDOOR FROST THERMOSTAT SCREWS
FIGURE 58 Ð ESCUTCHEON REMOVAL
IN OPEN CONTROL BOX
FIGURE 61 Ð COMPONENT LOCATIONS
FAN MOTOR
FAN MOTOR TROUBLESHOOTING
BASIC FAN MOTOR ELECTRICAL TESTS
FIGURE 62 Ð TWO-SPEED,PERMANENT
TYPICAL 208/230 VOLT MOTORS
FIGURE 63 Ð FAN MOTOR TROUBLESHOOTING CHART
TYPICAL 265 VOLT MOTORS
FIGURE 64 Ð TYPICAL 52S FAN MOTORS
Removal
FAN MOTOR REPLACEMENT
FIGURE 65 Ð SPRING CLIP
FIGURE 66 Ð REMOVING OUTDOOR FAN FROM MOTOR SHAFT
See Figures 67 - 82 for eld temperature data
FIELD TEMPERATURE CHARTS
52S SERIES
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located next to the unit control box
WIRING SCHEMATICS
Ð Capacitor
52S SERIES
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Ð Capacitor
52S SERIES
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No, only for use on remote control RC models
MOST FREQUENT PTAC SERVICE QUESTIONS
By using a slinger ring to evaporate the water on
the outdoor coil, and by using an optional acces
