Service manual
iv
T -318
TABLE OF CONTENTS -- Continued
PARAGRAPH NUMBER Page
5.2 UNIT OPERATES LONG OR CONTINUOUSLY IN COOLING 5--1..............................
5.3 UNIT RUNS BUT HAS INSUFFICIENT COOLING 5--2........................................
5.4 UNIT WILL NOT HEAT OR HAS INSUFFICIENT HEATING 5--2................................
5.5 UNIT WILL NOT TERMINATE HEATING 5--2................................................
5.6 UNIT WILL NOT DEFROST PROPERLY 5--2................................................
5.7 ABNORMAL PRESSURES (COOLING) 5--3.................................................
5.8 ABNORMAL NOISE OR VIBRATIONS 5--3..................................................
5.9 CONTROLLER MALFUNCTION 5--3........................................................
5.10 NO EVAPORATOR AIR FLOW OR RESTRICTED AI R FLOW 5--4..............................
5.11 THERMOSTATIC EXPANSION VALVE MALFUNCTION 5--4...................................
5.12 AUTOTRANSFORMER MALFUNCTION 5--4................................................
5.13 W ATER-COOLED CONDENSER OR WATER PRESSURE SWITCH 5--4........................
SERVICE 6--1....................................................................................
6.1 SECT ION LAYOUT 6-- 1...................................................................
6.2 SERVICE VALVES 6-- 1....................................................................
6.3 MANI FOLD GAUGE SET 6-- 1..............................................................
6.4 PUMPING THE UNIT DOWN 6--2..........................................................
6.5 REFRIGERANT LEAK CHECKING 6--3.....................................................
6.6 EVACUATION AND DEHYDRATION 6--3....................................................
6.6.1 General 6-- 3..........................................................................
6.6.2 Preparation 6--3.......................................................................
6.6.3 Procedure - Complete System 6--3......................................................
6.6.4 Procedure - Partial System 6--4.........................................................
6.7 REFRIGERANT CHARGE 6--4.............................................................
6.7.1 Checking the Refrigerant Charge 6--4....................................................
6.7.2 Adding Refrigerant to System (Full Charge) 6--4...........................................
6.7.3 Adding Refrigerant to System (Partial Charge) 6--4........................................
6.8 COM PRESSO R 6--5......................................................................
6.8.1 Removal and Replacement of Compressor 6--5...........................................
6.8.2 Compressor Disassembly 6--6..........................................................
6.8.3 Compressor Reassembly 6--8...........................................................
6.8.4 Preparation 6--8.......................................................................
6.8.5 Installing the Components 6--9..........................................................
6.8.6 Compressor Oil Level 6--9..............................................................
6.9 HIGH PRESSURE SWITCH 6--10...........................................................
6.9.1 Replacing High Pressure Switch 6--10.....................................................
6.9.2 Checking High Pressure Switch 6--10.....................................................
6.10 CONDENSER COIL 6--10..................................................................
6.11 CONDENSER FAN AND MOTOR ASSEMBLY 6--10...........................................
6.12 W ATER-COOLED CONDENSER CLEANING 6--11............................................
6.13 FILTER-DRIER 6-- 12.......................................................................
6.14 THERMOSTATIC EXPANSION VALVE 6--12..................................................
6.14.1 Checking Superheat 6-- 13...............................................................
6.14.2 Expansion Valve Replacement 6--13
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