iiT -312
TABLE OF CONTENTS -- Continued
Section Page
2.3.15 Alarm Description 2-6............................................................
2.3.16 Hour Meters 2-6.................................................................
2.3.17 Communications (Driver Display - Controller) 2-6....................................
TROUBLESHOOTING 3-1....................................................................
3.3.1 System Will Not Cool 3-5.........................................................
3.3.2 System Runs But Has Insfficient Cooling 3-5........................................
3.3.3 Abnormal Pressures 3-5..........................................................
3.3.4 Abnormal Noises Or Vibrations 3-5.................................................
3.3.5 Control System Malfunction 3-6....................................................
3.3.6 No Evaporator Air Flow Or Restricted Air Flow 3-6...................................
3.3.7 Expansion Valve Malfunction 3-6...................................................
3.3.8 No Or Insufficient Heating 3-6.....................................................
SERVICE 4-1...............................................................................
4.1 MAINTENANCE SCHEDULE 4-1......................................................
4.2 SUCTION AND DISCHARGE SERVICE VALVES 4-1....................................
4.3 INST ALLING MANIFOLD GAUGES 4-2................................................
4.3.1 Installing R-134a Manifold Guage Set 4-2...........................................
4.4 PUMPI NG THE SYSTEM DOWN OR REMOVING THE REFRIGERANT CHARGE 4-2......
4.4.1 System Pumpdown 4-2...........................................................
4.4.2 Removing the Refrigerant Charge 4-3..............................................
4.4.3 Refrigerant Removal From An Inoperative Compressor. 4-3...........................
4.4.4 Pump Down An Operable Compressor For Repair 4-3................................
4.5 REFRIGERANT LEAK CHECK 4-4....................................................
4.6 EVACUATION AND DEHYDRATION 4-4...............................................
4.6.1 General 4-4.....................................................................
4.6.2 Preparation 4-4..................................................................
4.6.3 Procedure for Evacuation and Dehydrating System 4-4...............................
4.7 ADDING REFRIGERANT TO SYSTEM 4-6.............................................
4.7.1 Checking Refrigerant Charge 4-6..................................................
4.7.2 Checking Refrigerant Charge (Alternate Method) 4-6.................................
4.7.3 Adding Full Charge 4-6...........................................................
4.7.4 Adding Partial Charge 4-6........................................................
4.8 CHECKING FOR NONCONDENSIBLES 4-6...........................................
4.9 CHECKING AND REPLACING HIGH PRESSURE CUTOUT SWITCH 4-7..................
4.9.1 Replacing High Pressure Switch 4-7................................................
4.9.2 Checking High Pressure Switch 4-7................................................
4.10 FILTER-DRIER 4-7..................................................................
4.10.1. To Check Filter Drier 4-7..........................................................
4.10.2. To Replace Filter Drier 4-7........................................................
4.11 THERMOSTATIC EXPANSION VALVE 4-7.............................................
4.11.1 Replacing the Expansion Valve 4-7.................................................
4.11.2 To Check/Measure Superheat 4-8..................................................
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