Руководство по эксплуатации Toyota Climate Control — Обучение (EN)

AIR CONDITIONING & CLIMATE CONTROL Course 752 Handbook © 2016 Toyota Motor Sales, U.S.A., Inc. TOYOTA Technical Training All rights reserved. This book may not be reproduced or copied, in whole or in part by any means, without the written permission of Toyota Motor Sales, U.S.A., Inc. Revision Date: August 22, 2016

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Table of Contents 752 Air Conditioning and Climate Control Objectives Final Student Performances .................................................................. a Air Conditioning Course Menu ........................................................................................ 2 and Climate Control Section 1: Preparation Section 1 Topics ................................................................................... 3 Safety Precautions ............................................................................... 4 Compressed Gases ..............................................................................

4 Compressor Oil ..................................................................................... 5 Electrical Circuits .................................................................................. 5 SRS Circuits ......................................................................................... 6 Warning Hybrid High-Voltage Circuits .................................................. 6 Certifications ......................................................................................... 7 Resources & Tools ............................................................................... 8 Section 2:

Section 2 Topics ................................................................................... 9 Heating System Components ............................................................. 10 PTC Heater ......................................................................................... 11 Heat Ranges ....................................................................................... 11 A/C System ......................................................................................... 12 Refrigerant Control Cycle ................................................................... 13 Expansion and Evaporation ................................................................

14 Compression and Condensation ........................................................ 14 Hot & Cold .......................................................................................... 15 Temperature Determines State .......................................................... 16 Three States of Matter ........................................................................ 16 Sensible Heat ..................................................................................... 17 Latent Heat ......................................................................................... 17 Pressure & Temperature ....................................................................

18 Low Pressure ....................................................................................... 18 High Pressure ...................................................................................... 18 Humidity & Effectiveness .................................................................... 19 Sources of Heat .................................................................................. 20 High and Low – Pressure Sides ......................................................... 21 System Flow ....................................................................................... 21 Basic A/C System – Refrigerant Flow .................................................

22 Automotive Refrigerants ..................................................................... 23 Refrigerants ........................................................................................ 24 Aftermarket R-1234yf Refrigerant ........................................................ 26 Precautions & Safety .......................................................................... 27 New Compressor Oil .......................................................................... 29 Heating & Cooling Basics Technical Training i

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Table of Contents 752 Air Conditioning and Climate Control Section 3: A/C System Components Section 3 Topics ................................................................................. 31 Compressor Types ............................................................................. 32 Compressor Function ......................................................................... 32 Sliding Vanes ...................................................................................... 33 Sludging Valve .................................................................................... 33 Scroll-type Compressor ......................................................................

34 Circular Motion ............................................................................... 34 Suction ............................................................................................ 35 Compression .................................................................................. 35 Discharge ....................................................................................... 35 Swash Plate Compressor ................................................................... 36 Hollow Shaft Swash Plate Compressor ............................................... 37 Variable Capacity Compressor ...........................................................

38 Solenoid Control Valve .................................................................... 38 Solenoid Closed ............................................................................. 38 Solenoid Open ................................................................................ 39 Continually Adjusting ...................................................................... 40 Increasing Demand ........................................................................ 40 Decreasing Demand ....................................................................... 40 Magnetic Clutch ...............................................................................

41 DL Pulley ........................................................................................ 41 Magnetic Clutch .................................................................................. 42 Compressor Clutch Replacement ....................................................... 43 Compressor Clutch Circuit .................................................................. 44 ECM-Controlled Clutch ....................................................................... 45 Damper Limiter Pulley ........................................................................ 46 Diagnosis ............................................................................................

46 Compressor Lock Sensor ................................................................... 47 Sub-Cool Condenser with Modulator ............................................... 48 Modulator Desiccant Bag & Filter ................................................... 49 Receiver/Dryer ................................................................................ 50 Expansion Valve Operation ................................................................ 51 Traditional Design ............................................................................... 51 Block-type Design ...............................................................................

51 Expansion Valve Foam Insulation ....................................................... 52 Evaporator .......................................................................................... 53 Dehumidification ................................................................................. 53 Ejector Cycle System (ECS) Evaporator ............................................ 54 Two Sensing Methods ........................................................................ 56 Pressure-Sensing Circuits .................................................................. 56 Multi-Pressure Switch in the EWD ......................................................

57 Pressure Sensor ................................................................................. 58 Air Conditioning Mass Flow Sensor ..................................................... 59 Gaskets & O-rings .............................................................................. 60 Tightening Fittings .............................................................................. 60 Quick Disconnect Fittings ................................................................... 61 ii Technical Training

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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

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