Heating, air conditioner

Chapter overview

• Technical data
  1
• 1 Safety information
  1
• 1.1 Safety precautions when working on air conditioning systems
  1
• 1.2 Safety precautions when working in the vicinity of high-voltage components
  2
• 1.3 Safety precautions when working on a high-voltage system
  2
• 1.4 Safety measures when working on vehicles with a start/stop system
  3
• 1.6 Safety precautions when working on the cooling system
  3
• 1.7 Safety precautions when handling refrigerants
  4
• 2 General information
  5
• 2.1 Type plates
  5
• 2.2 Notes concerning odours in air conditioned vehicles
  5
• 3 Repair notes
  7
• 3.1 Rules for cleanliness
  7
• 3.2 General repair instructions
  7
• 3.3 Contact corrosion
  8
• 3.4 Nuts and bolts
  8
• 3.5 Routing and attachment of lines
  8
• 3.6 Checking cooling output
  9
• 3.7 Working on refrigerant circuit
  10
• 3.8 Refrigerant circuit seals
  11
• 4 Technical data
  13
• 4.1 Refrigerant capacity
  13
• 4.2 Refrigerant oil capacities
  13
• 4.3 Oil distribution
  13
• 5 Hazard classification for the high-voltage system
  14
• Heating
  15
• 1 Heating
  15
• Air conditioning system
  16
• 1 Overview of fitting locations - air conditioning system
  16
• 1.1 Overview of fitting locations - components not located in passenger compartment
  16
• 2 Refrigerant circuit
  18
• 2.1 System overview - refrigerant circuit
  18
• 2.2 Overview of fitting locations - refrigerant pressure and temperature sender
  20
• 2.3 Assembly overview - refrigerant lines
  21
• 2.4 Assembly overview – condenser
  24
• 2.5 Assembly overview - heat condenser
  25
• 2.6 Removing and installing refrigerant pressure and temperature sender G395
  26
• 2.7 Removing and installing expansion valve
  29
• 2.8 Removing and installing condenser
  32
• 2.9 Removing and installing refrigerant pressure and temperature sender 3 G827
  34
• 2.10 Removing and installing refrigerant pressure and temperature sender 4 G828
  37
• 2.11 Removing and installing refrigerant pressure and temperature sender 5 G829
  40
• 2.12 Removing and installing heat exchanger for heating condenser
  43
• 2.13 Removing and installing heat condenser
  44
• 2.14 Separating and connecting refrigerant lines on condenser
  46
• 2.15 Removing and installing receiver
  49
• 2.17 Commissioning air conditioning system after filling refrigerant circuit
  56
• 2.18 Removing and installing refrigerant lines
  57
• 2.19 When is it necessary to purge the refrigerant circuit with refrigerant
  93
• 3 Valve unit of heat pump
  96
• 3.1 Overview of fitting locations - valve unit of heat pump
  96
• 3.2 Assembly overview – valve unit of heat pump
  97
• 3.3 Removing and installing refrigerant expansion valve 1 N636
  98
• 3.4 Removing and installing refrigerant expansion valve 2 N637
  100
• 3.5 Removing and installing refrigerant expansion valve 3 N638
  104
• 3.6 Removing and installing refrigerant shut-off valve 1 N696
  105
• 3.7 Removing and installing refrigerant shut-off valve 4 N642
  108
• 3.8 Removing and installing refrigerant shut-off valve 5 N643
  111
• 3.9 Removing and installing refrigerant pressure and temperature sender 2 G826
  114
• 4 Air conditioner compressor
  117
• 4.1 Assembly overview – drive unit of air conditioner compressor
  117
• 4.3 Removing and installing electrical air conditioner compressor V470
  120
• 4.4 Removing and installing air conditioner compressor fuse S355
  124
• 5 Control motors
  125
• 5.1 Overview of fitting locations – control motors at front
  125
• 5.2 Assembly overview - front control motors
  126
• 5.3 Removing and installing defroster flap control motor V107
  127
• 5.4 Removing and installing left temperature flap control motor V158
  129
• 5.5 Removing and installing right temperature flap control motor V159
  131
• 5.6 Removing and installing fresh air/air recirculation, air flow flap control motor V425
  132
• 5.7 Removing and installing front air distribution flap control motor V426
  135
• 6 Front heater and air conditioning unit
  137
• 6.1 Assembly overview – heater and air conditioning unit
  137
• 6.2 Assembly overview – evaporator housing
  139
• 6.3 Removing and installing evaporator
  140
• 6.4 Removing and installing heater and air conditioning unit
  140
• 6.5 Removing and installing holder for heater and air conditioning unit
  143
• 6.6 Dismantling and assembling heater and air conditioning unit
  144
• 6.7 Removing and installing air distribution housing
  145
• 6.8 Removing and installing dust and pollen filter
  146
• 6.9 Removing and installing fresh air blower V2
  148
• 6.10 Removing and installing fresh air blower control unit J126
  149
• 6.11 Removing and installing evaporator temperature sensor G308
  150
• 6.12 Removing and installing condensation drain
  151
• 6.13 Checking condensation drain
  152
• 7 Air duct
  153
• 7.2 Removing and installing driver side footwell vents
  156
• 7.3 Removing and installing front passenger side footwell vents
  157
• 7.4 Removing and installing air ducts
  158
• 7.5 Removing and installing forced ventilation for passenger compartment
  161
• 7.6 Checking forced ventilation for passenger compartment
  162
• 7.7 Removing and installing fresh air intake
  163
• 7.8 Removing and installing cover for fresh air intake
  165
• 7.9 Removing and installing air intake duct
  167
• 7.10 Removing and installing air duct for defroster vent
  168
• 7.11 Removing and installing air duct for centre dash panel vent
  168
• 7.12 Removing and installing components of glove compartment cooling
  169
• 8 Coolant circuit
  172
• 8.1 Overview of fitting locations – coolant circuit
  172
• 8.2 Connection diagram - high-voltage heater
  172
• 8.4 Removing and installing coolant pump V36
  177
• 8.5 Removing and installing coolant changeover valve 1 N632
  179
• 8.6 Removing and installing air conditioning system coolant temperature sender G110
  180
• 9 Operating and display unit
  184
• 9.1 Overview of operating and display unit
  184
• 9.2 Removing and installing operating and display unit
  186
• 10 Other controlling and regulating components
  188
• 10.1 Removing and installing sunlight penetration photosensor G107
  188
• 10.2 Removing and installing ambient temperature sensor G17
  189
• 10.3 Removing and installing humidity sender for air conditioning system G260
  189
• 10.4 Removing and installing footwell vent temperature sender G192
  189
• 10.5 Removing and installing chest vent temperature sensors at front G385/ G386
  190
• 10.6 Removing and installing thermal management control unit J1024
  192