Carrier 52C, P manual Service Technician Guide, Contents

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52C,P

SERIES

SERVICE TECHNICIAN GUIDE

PACKAGED TERMINAL AIR CONDITIONERS

AND HEAT PUMPS

CONTENTS

Page

INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,3

SUMMARY OF DANGERS, WARNINGS,

AND CAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

UNIT DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,4 TOOLS NEEDED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 REMOVE FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . 3

DISCONNECT POWER FOR CORD-CONNECTED UNIT . . . . . . . . . . . . . . . . . . . . . 3

DISCONNECT POWER FOR PERMANENTLY CONNECTED (HARDWIRED) UNITS . . . . . . . . . . . . 3 OPEN THE CONTROL BOX . . . . . . . . . . . . . . . . . . . . . 4

REMOVE THE UNIT FROM THE WALL SLEEVE . . 4

ACCESSING UNIT COMPONENTS . . . . . . . . . . . . . .5-8

ACCESSING INDOOR-AIR SECTION COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

ACCESSING OUTDOOR-AIR SECTION COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 REINSTALL FRONT PANEL . . . . . . . . . . . . . . . . . . . . . 8

GENERAL CLEANING . . . . . . . . . . . . . . . . . . . . . . . . .9-12 CLEANING AND SAFETY . . . . . . . . . . . . . . . . . . . . . . 9 TOOLS NEEDED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 MONTHLY CLEANING. . . . . . . . . . . . . . . . . . . . . . . . 10 SEASONAL CLEANING . . . . . . . . . . . . . . . . . . . . . . . 11

COMPRESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-17 COMPRESSOR TROUBLESHOOTING . . . . . . . . . . . 14

BASIC HERMETIC COMPRESSOR

ELECTRICAL MEASUREMENTS . . . . . . . . . . . . . . . 14 COMPRESSOR REPLACEMENT . . . . . . . . . . . . . . . . 15

Page

HEATERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18,19 COMMON CAUSES OF HEATER FAILURE. . . . . . . 18 HEATER REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

OPERATING CONTROLS. . . . . . . . . . . . . . . . . . . . . 20-28 UNIT-MOUNTED CONTROLS . . . . . . . . . . . . . . . . . . 20

WALL-MOUNTED THERMOSTAT CONTROLS . . . 21 REMOTE THERMOSTAT TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . 21

DESCRIPTION OF SELECTOR

SWITCH SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 NON-USER ADJUSTABLE CONTROLS . . . . . . . . . . 23 SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . 24

COMPONENT OPERATION AND TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . 24

ELECTRICAL COMPONENTS REMOVAL

AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . 27

FAN MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-31 FAN MOTOR TROUBLESHOOTING. . . . . . . . . . . . . 29 BASIC FAN MOTOR ELECTRICAL TESTS . . . . . . . . 29 FAN MOTOR REPLACEMENT . . . . . . . . . . . . . . . . . . 31

FIELD TEMPERATURE CHARTS . . . . . . . . . . . . . . 32-40

WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . 41-45

MOST FREQUENT PTAC SERVICE

QUESTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 ACCESSORIES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

52C PERFORMANCE AND PHYSICAL DATA. . . . . . 48 52P PERFORMANCE AND PHYSICAL DATA . . . . . . 49

PTAC Customer Support Center

1•800•894•6449

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Contents Contents Service Technician GuideSummary of DANGERS, WARNINGS, and Cautions IntroductionDisconnect Power for CORD-CONNECTED Unit Unit DisassemblyDisconnect Power for Permanently Connected Hardwired Units Tools NeededRemove the Unit from the Wall Sleeve Open the Control BOXAccessing INDOOR-AIR Section Components Accessing Unit ComponentsAccessing OUTDOOR-AIR Section Components Remove the Discharge Deck AssemblyRemove the AIR Discharge Grille Ptac Unit with Lateral Duct Accessory InstalledGusset Removal Location of Screws on Discharge Grille Reinstall Front PanelCleaning and Safety General CleaningComponent Cleaning Schedule Cleaning the Outdoor AIR Vent Filter Monthly CleaningCleaning the Indoor and Outdoor Coils Seasonal CleaningAccess and Clean Indoor FAN and FAN Scroll Ptac Exterior Surfaces Rotary Compressor Components CompressorDisconnect ALL Power to the Unit Compressor TroubleshootingBasic Hermetic Compressor Electrical Measurements Basic Compressor Troubleshooting Guide Compressor ReplacementSHORTED/OPEN Windings Test Strainer Capillary Tube Location Common Causes Heater Failure HeatersHeater Removal Acceptable Heater Resistance Values Disconnect ALL Power to UnitUNIT-MOUNTED Controls Operating ControlsWALL-MOUNTED Thermostat Controls Remote Thermostat TroubleshootingDo not daisy chain R 24 VAC NON-USER Adjustable Controls Description of Selector Switch Settings FigureSequence of Operation Component Operation and TroubleshootingTools Needed Indoor Thermostat IT CONTACTS, ALL 52CE, PE Models Indoor Thermostat IT CONTACTS, ALL 52CQ, PQ Models Capacitor Test 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 MotorsLocation of Wiring Schematic On Front Panel of Control BOX FAN Motor ReplacementField Temperature Charts 100 110 120 130 52P 12,000 BTU Unit Field Temperature Chart High Cool 50% RH Indoor Series Indoor 52C,P Series Page 000 Btu 52P-12,000 Btu 52C-12,000 Btu 15,000 Btu Refer to Figures 68-72 for Typical Wiring Schematics Wiring DiagramsComponent Legend CAP Component Connection Marked Fan Motor Page Most Frequent Ptac Service Questions Accessory Form Number Part Number Description AccessoriesAmps 52C Performance and Physical Data52PE-512---3 52P Performance and Physical DataPage Page Copyright 2002 Carrier Corporation
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