Carrier 52S manual Service Technician Guide, Contents

MONTHLY CLEANING SEASONAL CLEANING

CLEANING AND SAFETY

GENERAL CLEANING

SUMMARY OF DANGERS, WARNINGS, AND CAUTIONS

52S

SERIES

SERVICE TECHNICIAN GUIDE

PACKAGED TERMINAL AIR CONDITIONERS

AND HEAT PUMPS

CONTENTS

Page

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

. . . 2 GENERAL DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

TO DISCONNECT POWER FOR CORD-CONNECTED UNIT . . 4 TO DISCONNECT POWER FOR PERMANENTLY CONNECTED (HARDWIRED) UNITS . . . . . . . . . . . . . . . . . . . 4 TO OPEN THE CONTROL BOX . . . . . . . . . . . . . . . . . . . . . . . 4 TO REMOVE THE UNIT FROM THE WALL SLEEVE . . . . . . . . 4

TO REMOVE THE LATERAL DUCT EXTENSION, FOR UNITS EQUIPPED WITH THE LATERIAL DUCT ACCESSORY PACKAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

TO ACCESS INDOOR-AIR SECTION COMPONENTS . . . . . . . 6

TO ACCESS OUTDOOR-AIR SECTION COMPONENTS . . . . . . 8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-15

. . . . . . . . . . . . . . . . . . . . . . . . . . 10 TOOLS NEEDED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

. . . . . . . . . . . . . . . . . . . . . . . . . . . 13

COMPRESSOR	16-21
COMPRESSOR TROUBLESHOOTING	. . 17
BASIC HERMETIC COMPRESSOR ELECTRICAL
MEASUREMENTS	. . 17
COMPRESSOR REPLACEMENT	. . 19

	Page
HEATERS	22,23
COMMON CAUSES OF HEATER FAILURE	. . 22
HEATER REMOVAL	. . 22
OPERATING CONTROLS	24-31
DESCRIPTION OF SWITCH SETTINGS	. . 25
NON-USER ADJUSTABLE SWITCHES	. . 25
SEQUENCE OF OPERATION	. . 26
COMPONENT OPERATION AND TROUBLESHOOTING . .	. . 27
ELECTRICAL COMPONENTS REMOVAL AND
REPLACEMENT	. . 30
FAN MOTOR	32-34
FAN MOTOR TROUBLESHOOTING	. . 32
BASIC FAN MOTOR ELECTRICAL TESTS	. . 32
FAN MOTOR REPLACEMENT	. . 34
FIELD TEMPERATURE CHARTS	35-50
WIRING SCHEMATICS	51-55

MOST FREQUENT PTAC SERVICE QUESTIONS . . . . . . . . . . 56

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