Table of Contents 752 Air Conditioning and Climate Control Break-away Connector ....................................................................... 62 A/C Condenser Fans .......................................................................... 63 Fluid Coupling ..................................................................................... 63 Electrically-driven Fans ...................................................................... 64 Refrigerant Cycle Review ................................................................... 65 Section 4: A/C Section 4 Topics .................................................................................
67 System Checks ................................................................................... 68 Checking Belt Tension ........................................................................ 69 Maintenance-Related Issues .............................................................. 72 A/C System Odors .............................................................................. 74 System Inspection and Service Introduction ..................................................................................... 74 General Procedure .........................................................................
74 A/C Pressure Gauge .......................................................................... 76 Static Charge Test .............................................................................. 76 Normal System Pressures .................................................................. 77 Robinair 11815-00008 RRR Machine for R-1234yf ............................. 78 Service Fittings .................................................................................... 79 Warranty Code ................................................................................... 80 Service Procedure Differences ...........................................................
81 Symptoms of Significant Undercharge ........................................... 83 Symptoms of Overcharge ............................................................... 84 Symptoms of Defective Compressor .............................................. 85 Symptoms of Expansion Valve Failure ........................................... 86 Leak Detection .................................................................................... 88 Visual Inspection ............................................................................ 88 Leak Detectors ...............................................................................
88 Leak Testing Dyes .......................................................................... 89 Sealants .......................................................................................... 89 Electronic Leak Detectors ................................................................... 90 Refrigerant Shortage Detection Control ............................................. 91 Cross-Contamination .......................................................................... 93 Identifying Refrigerant ........................................................................ 93 Refrigerant Recovery, Recycling and Recharging Station .................
95 Standards ....................................................................................... 95 Equipment Variations ..................................................................... 96 Recovery ........................................................................................ 97 Recycling ........................................................................................ 97 Non-Condensables ......................................................................... 98 Flushing Precautions ...................................................................... 98 Evacuation ..........................................................................................
99 The 30-30 Rule .................................................................................... 99 Lubrication Oil ................................................................................... 100 Oil Replacement ............................................................................... 100 Inline Filter Precautions .................................................................... 101 Technical Training iii