Carrier 40 - Page 6

ii
62--10630
TABLE OF CONTENTS
PARAGRAPH NUMBER Page
3.2.6.2 Heating 3-4...................................................................
3.2.7 Abnormal Noise 3-4..................................................................
3.2.8 Cab Command Malfunction 3-4........................................................
3.2.9 No Evaporator Air Flow or Restricted Air Flow 3-4........................................
3.2.10 Expansion Valve 3-5...................................................................
3.2.11 Malfunction Hot Gas Solenoid or Condenser Pressure Regulating Valve 3-5...................
3.2.12 Standby Compressor Malfunction 3-5....................................................
SERVICE 4-1....................................................................................
4.1 PREVENTATIVE MAINTENANCE 4-1......................................................
4.2 BELT MAINTENANCE AND ADJUSTMENT 4-1..............................................
4.3 EVAPORATOR COIL CLEANING 4-2.......................................................
4.4 CONDENSER COIL CLEANING 4-2........................................................
4.5 CHECKING AND REPLACING FILTER-DRIER 4-2...........................................
4.6 CHECKING THE TXV ORIFICE STRAINER 4-2.............................................
4.7 REMOVING THE REFRIGERANT CHARGE 4-2.............................................
4.7.1 Removing Complete Charge 4-2........................................................
4.7.2 Pumping The Unit Down 4-2...........................................................
4.8 REFRIGERANT LEAK CHECKING 4-3.....................................................
4.9 EVACUATION AND DEHYDRATION 4-3....................................................
4.9.1 General 4-3..........................................................................
4.9.2 Preparation 4-3.......................................................................
4.9.3 Evacuation and Dehydration -- Complete System. 4-3.....................................
4.9.4 Evacuation and Dehydration -- Partial System. 4-4........................................
4.10 CHARGING THE REFRIG ERATION SYSTEM 4-4...........................................
4.10.1 Checking The Refrigerant Charge 4-4...................................................
4.10.2 Installing A Complete Charge 4-4.......................................................
4.10.3 Adding A Partial Charge 4-5............................................................
4.11 REPLACING THE COMPRESSOR 4-5.....................................................
4.12 HIGH PRESSURE OR CONDENSER PRESSURE SWITCH 4-5...............................
4.12.1 Removing Switch 4-5..................................................................
4.12.2 Checking Pressure Switch 4-5..........................................................
4.13 CHECKING AND REPLACING CONDENSER FAN MOTOR BRUSHES 4-6.....................
4.14 HOT GAS AND CONDENSER PRESSURE CONTROL SOLENOID VALVES 4-6.................
4.14.1 Replacing Solenoid Coil 4-6...........................................................
4.14.2 Replacing Valve Internal Parts 4-6.......................................................
4.15 ADJUSTING THE COMPRESSOR PRESSURE REG ULATI NG VALVE (CPR) 4-7................
4.16 THERMOSTATI C EXPANSION VALVE 4-7..................................................
4.16.1 Replacing expansion valve 4-7.........................................................
4.16.2 Measuring superheat 4-7..............................................................
4.17 MICROPROCESSOR 4-7.................................................................
SCHEMATIC DIAGRAMS 5-1......................................................................
5.1 INTRODUCTION 5-1.....................................................................