Heating, air conditioner

Kapitelübersicht

• Technical data
  1
• 1 General information
  1
• 1.1 Notes concerning odours in air conditioned vehicles
  1
• 1.2 Notes for vehicles with a start/stop system
  1
• 1.3 Procedure when checking and adjusting components
  2
• 1.4 Distribution of oil in refrigerant circuit
  2
• 2 Safety information
  3
• 2.1 Safety precautions when working on air conditioning systems
  3
• 2.2 Safety measures when working on vehicles with a start/stop system
  3
• 3 Repair instructions
  5
• 3.1 Checking cooling output
  5
• 4 Technical data
  7
• 4.1 Refrigerant capacity
  7
• 4.2 Refrigerant oil capacities
  7
• 4.3 Oil distribution
  7
• Heating
  9
• 1 Heater
  9
• 1.1 Overview of fitting locations - heater unit
  9
• 1.2 Overview of fitting locations – heater unit for second heat exchanger
  11
• 1.5 Removing and installing heater for second heat exchanger
  13
• 1.6 Dismantling and assembling heater for second heat exchanger
  14
• 1.7 Removing and installing second heat exchanger
  15
• 1.10 Removing and installing fresh air blower V2
  18
• 1.11 Removing and installing fresh air blower series resistor with overheating fuse N24
  19
• 1.12 Removing and installing dust and pollen filter
  20
• 1.13 Dust and pollen filter with activated charcoal filter insert
  20
• 1.14 Removing and installing heater unit
  21
• 1.15 Dismantling and assembling heater unit
  23
• 1.16 Removing and installing heat exchanger
  24
• 1.17 Removing and installing auxiliary air heater element Z35
  25
• 2 Control motors/actuators
  27
• 2.1 Removing and installing temperature flap actuator
  27
• 2.2 Removing and installing fresh air/air recirculation flap control motor V154
  27
• 3 Air duct
  30
• 3.1 Overview of fitting locations of air ducting and vents
  30
• 3.2 Removing and installing driver side footwell vents
  31
• 3.3 Removing and installing front passenger side footwell vents
  32
• 3.4 Removing and installing rear footwell vent
  33
• 3.5 Checking forced ventilation
  35
• 3.6 Removing and installing air duct for defroster vent
  36
• 3.7 Removing and installing air duct for centre dash panel vent
  37
• 3.9 Removing and installing air duct for side window vents
  38
• 3.10 Removing and installing vent for second heat exchanger
  39
• 4 Operating and display unit
  41
• 4.1 Removing and installing operating and display unit for heater and fresh air system
  41
• Air conditioning system
  44
• 1 Overview of fitting locations - air conditioning system
  44
• 1.1 Overview of fitting locations - components not located in passenger compartment
  44
• 2 Refrigerant circuit
  49
• 2.1 System overview - refrigerant circuit
  49
• 2.2 Assembly overview - expansion valve
  50
• 2.3 Removing and installing high-pressure sender G65
  51
• 2.4 Removing and installing expansion valve
  53
• 2.5 Removing and installing condenser
  55
• 2.6 Removing and installing desiccant bag or cartridge
  58
• 2.8 Commissioning air conditioning system after filling refrigerant circuit
  62
• 2.9 When is it necessary to purge the refrigerant circuit with refrigerant
  63
• 3 Air conditioner compressor
  65
• 3.1 Assembly overview – drive unit of air conditioner compressor
  65
• 3.2 Assembly overview - pulley
  65
• 3.3 Removing and installing air conditioner compressor
  66
• 3.4 Notes on installing air conditioner compressor
  69
• 3.5 Checking high-pressure safety valve on air conditioner compressor
  71
• 3.6 Removing and installing pulley
  71
• 4 Control motors
  72
• 4.1 Removing and installing temperature flap control motor V68
  72
• 4.2 Removing and installing centre flap control motor V70
  73
• 4.3 Removing and installing air recirculation flap control motor V113
  73
• 5 Front heater and air conditioning unit
  75
• 5.1 Assembly overview – heater and air conditioning unit
  75
• 5.2 Removing and installing evaporator
  76
• 5.3 Removing and installing heater and air conditioning unit
  76
• 5.4 Checking condensation drain
  80
• 6 Air duct
  82
• 6.1 Removing and installing evaporator temperature sensor G308
  82
• 7 Operating and display unit
  83
• 7.2 Removing and installing air conditioning system control unit J301
  83
• 8 Other controlling and regulating components
  86
• 8.1 Removing and installing radiator fan housing
  86
• 8.2 Removing and installing radiator fan V7
  87
• 8.3 Removing and installing radiator fan relay J26
  87
• 8.4 Fresh air blower control unit J126
  88
• 8.5 Removing and installing radiator fan control unit J293
  88
• 9 Roof air conditioning system
  90
• 9.1 Assembly overview - roof air conditioning system
  90
• 9.2 Assembly overview - trim panels and roof air ducts
  92
• 9.3 Roof air conditioning system - way in which air is exchanged
  93
• 9.4 Removing and installing air conditioning system control unit J301
  93
• 9.6 Pin assignment on back of air conditioning system control unit J301
  95
• 9.7 Removing and installing fleece filter element
  97
• 9.8 Removing and installing front vent trim
  97
• 9.9 Removing and installing trim panel for heat exchanger housing
  99
• 9.10 Removing and installing centre vent trim
  102
• 9.11 Removing and installing rear vent trim
  104
• 9.12 Removing and installing front roof air duct
  106
• 9.13 Removing and installing rear roof air duct
  108
• 9.14 Removing and installing upper cover
  109
• 9.15 Removing and installing insulation and upper air duct
  110
• 9.16 Removing and installing rear evaporator blower V20
  111
• 9.17 Removing and installing evaporator blower control unit J349
  113
• 9.18 Removing and installing rear temperature flap control motor V137
  114
• 9.19 Removing and installing rear evaporator temperature sender G153
  115
• 10 Refrigerant circuit of roof air conditioning system
  118
• 10.1 Assembly overview - roof air conditioning system fitting locations
  118
• 10.2 Connection diagram of refrigerant circuit on vehicles with second evaporator
  120
• 10.3 Assembly overview - condensation drainage
  122
• 10.5 Removing and installing heat exchanger housing (complete)
  127