Heating, air conditioner

Kapitelübersicht

• Technical data
  1
• 1 Safety information
  1
• 1.1 Safety precautions when working on air conditioning systems
  1
• 1.2 Safety measures when working on vehicles with a start/stop system
  1
• 1.4 Safety precautions when working on the cooling system
  2
• 1.5 Safety precautions when handling refrigerants
  2
• 1.6 Safety precautions for working on vehicles with auxiliary/supplementary heater
  3
• 1.7 Safety precautions when working on the SCR system
  4
• 2 General information
  6
• 2.1 Type plates
  6
• 3 Repair instructions
  7
• 3.1 Rules for cleanliness
  7
• 3.2 General information
  7
• 3.3 General repair instructions
  7
• 3.4 Contact corrosion
  8
• 3.5 Nuts and bolts
  8
• 3.6 Routing and attachment of lines
  8
• 3.7 Fitting radiators and condensers
  8
• 3.8 Checking cooling output
  9
• 3.9 Working on refrigerant circuit
  11
• 3.10 Refrigerant circuit seals
  11
• 4 Technical data
  13
• 4.1 Refrigerant capacity
  13
• 4.2 Refrigerant oil capacities
  13
• 4.3 Oil distribution
  13
• Heating
  14
• 1 Heater
  14
• 1.1 Assembly overview – heater unit
  14
• 1.2 Removing and installing fresh air blower V2
  15
• 1.3 Removing and installing fresh air blower series resistor with overheating fuse N24
  15
• 1.4 Removing and installing dust and pollen filter
  15
• 1.5 Removing and installing heat exchanger
  15
• 1.6 Removing and installing heater unit
  15
• 1.7 Dismantling and assembling heater unit
  20
• 2 Control motors
  21
• 2.1 Overview of fitting locations – front control motors, heating system
  21
• 2.2 Removing and installing fresh air and air recirculation flap control motor V154
  21
• 3 Air duct
  23
• 3.1 Removing and installing driver side footwell vents
  23
• 3.2 Checking forced ventilation for passenger compartment
  23
• 3.3 Removing and installing fresh air intake
  23
• 4 Operating and display unit
  24
• 4.1 Removing and installing operating and display unit
  24
• Air conditioning system
  26
• 1 Overview of fitting locations - air conditioning system
  26
• 1.1 Overview of fitting locations - components not located in passenger compartment
  26
• 2 Refrigerant circuit
  33
• 2.1 System overview - refrigerant circuit
  33
• 2.2 Removing and installing high-pressure sender G65
  37
• 2.3 Removing and installing expansion valve
  39
• 2.4 Removing and installing condenser
  42
• 2.5 Removing and installing desiccant bag or cartridge
  45
• 2.7 Commissioning air conditioning system after filling refrigerant circuit
  49
• 2.8 When is it necessary to purge the refrigerant circuit with refrigerant
  50
• 3 Air conditioner compressor
  52
• 3.1 Assembly overview – drive unit of air conditioner compressor
  52
• 3.2 Removing and installing air conditioner compressor
  53
• 3.3 Checking high-pressure safety valve on air conditioner compressor
  60
• 4 Control motors
  61
• 4.1 Overview of fitting locations – control motors at front
  61
• 4.2 Removing and installing temperature flap control motor V68
  64
• 4.3 Removing and installing defroster flap control motor V107
  66
• 4.4 Removing and installing air recirculation flap control motor V113
  67
• 4.5 Removing and installing left temperature flap control motor V158
  68
• 4.6 Removing and installing right temperature flap control motor V159
  70
• 4.7 Footwell flap control motor V261
  72
• 4.8 Removing and installing fresh air/air recirculation, air flow flap control motor V425
  74
• 4.9 Removing and installing air distribution flap control motor V428
  75
• 5 Front heater and air conditioning unit
  78
• 5.1 Assembly overview – heater and air conditioning unit
  78
• 5.2 Removing and installing evaporator
  81
• 5.3 Removing and installing heater and air conditioning unit
  82
• 5.4 Dismantling and assembling heater and air conditioning unit
  86
• 5.5 Removing and installing dust and pollen filter
  87
• 5.6 Removing and installing fresh air blower V2
  88
• 5.7 Removing and installing fresh air blower control unit J126
  90
• 5.8 Removing and installing heat exchanger
  91
• 5.9 Removing and installing evaporator temperature sensor G308
  96
• 5.10 Removing and installing condensation drain
  97
• 5.11 Checking condensation drain
  98
• 5.12 Removing and installing fresh air blower series resistor with overheating fuse N24
  98
• 6 Air duct
  100
• 6.1 Assembly overview – air duct and air distribution in passenger compartment
  100
• 6.2 Removing and installing driver side footwell vents
  101
• 6.3 Removing and installing rear footwell vent
  101
• 6.4 Removing and installing air ducts
  102
• 6.5 Checking forced ventilation for passenger compartment
  103
• 6.6 Removing and installing fresh air intake
  104
• 7 Operating and display unit
  106
• 7.1 Overview of operating and display unit
  106
• 7.2 Removing and installing operating and display unit
  111
• 8 Other controlling and regulating components
  113
• 8.1 Removing and installing sunlight penetration photosensor G107
  113
• 8.2 Working principles of air quality sensor G238
  114
• 8.3 Removing and installing air quality sensor G238
  115
• 8.4 Removing and installing ambient temperature sensor G17
  116
• 8.5 Removing and installing humidity sender for air conditioning system G260
  117
• 8.6 Removing and installing left vent temperature sender G150
  117
• 8.7 Removing and installing right vent temperature sender G151
  117
• 8.8 Removing and installing footwell vent temperature sender G192
  118
• 8.9 Removing and installing left footwell vent temperature sender G261
  118
• 8.10 Removing and installing right footwell vent temperature sender G262
  119