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SERVICE TECHNICIAN GUIDE
PACKAGED TERMINAL AIR CONDITIONERS
CONTENTS
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,3
SUMMARY OF DANGERS, WARNINGS,
AND CAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
UNIT DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,4
TOOLS NEEDED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
REMOVE FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . 3
CORD-CONNECTED UNIT . . . . . . . . . . . . . . . . . . . . . 3
CONNECTED (HARDWIRED) UNITS . . . . . . . . . . . . 3
OPEN THE CONTROL BOX . . . . . . . . . . . . . . . . . . . . . 4
ACCESSING UNIT COMPONENTS . . . . . . . . . . . . . .5-8
COMPONENTS (UNITS WITH LATERAL
DUCT ACCESSORY). . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
ACCESSING INDOOR-AIR SECTION
COMPONENTS (UNITS WITHOUT LATERAL
DUCT ACCESSORY) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
GENERAL CLEANING . . . . . . . . . . . . . . . . . . . . . . . . .9-12
CLEANING AND SAFETY . . . . . . . . . . . . . . . . . . . . . . 9
TOOLS NEEDED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
MONTHLY CLEANING. . . . . . . . . . . . . . . . . . . . . . . . 10
SEASONAL CLEANING . . . . . . . . . . . . . . . . . . . . . . . 11
52C,P
52C,P
SERIES
SERIES
AND HEAT PUMPS
Page
COMPRESSOR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-17
COMPRESSOR TROUBLESHOOTING . . . . . . . . . . . 14
ELECTRICAL MEASUREMENTS . . . . . . . . . . . . . . . . 14
COMPRESSOR REPLACEMENT . . . . . . . . . . . . . . . . 15
HEATERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18,19
HEATER REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
OPERATING CONTROLS. . . . . . . . . . . . . . . . . . . . . 20-27
NON-USER ADJUSTABLE CONTROLS . . . . . . . . . . 22
SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . 23
AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . 26
FAN MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-30
FAN MOTOR TROUBLESHOOTING. . . . . . . . . . . . . 28
FAN MOTOR REPLACEMENT . . . . . . . . . . . . . . . . . . 30
WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . 31-35
MOST FREQUENT PTAC SERVICE
QUESTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
ACCESSORIES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
PTAC Customer Support Center
1•800•894•6449
Page

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52ce series52cq series52pe series52pq series52pc series52pqa312301aa

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