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 handling refrigerants
  2
• 1.3 Safety measures when working on vehicles with start/stop system
  2
• 1.4 Safety precautions when working on high-voltage system
  2
• 1.5 Safety precautions when working in the vicinity of high-voltage components
  3
• 1.6 Safety precautions when working on the cooling system
  3
• 1.7 Safety precautions for working on vehicles with auxiliary/supplementary heater
  4
• 2 Identification
  6
• 2.1 Identification of heater and air conditioning unit
  6
• 3 General information
  8
• 3.1 Type plates
  8
• 4 Repair instructions
  11
• 4.1 Working on refrigerant circuit
  11
• 4.2 General repair instructions
  12
• 4.3 Refrigerant circuit seals
  12
• 4.4 Checking cooling output
  12
• 5 Technical data
  16
• 5.1 Refrigerant capacity
  16
• 5.2 Refrigerant oil
  16
• 5.3 Oil distribution
  17
• Heating
  18
• 1 Heating
  18
• Air conditioning system
  19
• 1 Overview of fitting locations - air conditioning system
  19
• 1.1 Overview of fitting locations - components not located in passenger compartment
  19
• 2 Refrigerant circuit
  24
• 2.1 System overview - refrigerant circuit
  24
• 2.2 Assembly overview - refrigerant lines
  26
• 2.3 Assembly overview – condenser
  30
• 2.4 Assembly overview - heat exchanger for high-voltage battery
  35
• 2.5 Removing and installing refrigerant circuit pressure sender G805
  36
• 2.6 Removing and installing expansion valve
  38
• 2.7 Removing and installing condenser
  46
• 2.8 Removing and installing desiccant bag or cartridge
  49
• 2.9 Removing and installing damper weight for refrigerant line, low-pressure side
  60
• 2.13 Removing and installing heat exchanger for high-voltage battery
  69
• 2.14 Removing and installing refrigerant line with internal heat exchanger
  74
• 2.18 Commissioning air conditioning system after filling refrigerant circuit
  97
• 3 Air conditioner compressor
  99
• 3.1 Assembly overview – drive unit of air conditioner compressor
  99
• 3.2 Assembly overview - pulley
  104
• 3.3 Removing air conditioning compressor from and installing on bracket
  108
• 3.4 Removing and installing air conditioner compressor
  112
• 3.5 Removing and installing high-voltage system fuse 3 S353
  119
• 3.6 Checking high-pressure safety valve on air conditioner compressor
  119
• 3.7 Removing and installing pulley
  120
• 4 Control motors
  126
• 4.1 Overview of fitting locations – control motors at front
  126
• 4.4 Removing and installing air recirculation flap control motor V113
  138
• 4.7 Removing and installing rear temperature flap control motor V137
  150
• 4.11 Removing and installing air distribution flap adjustment unit
  163
• 5 Front heater and air conditioning unit
  172
• 5.1 Assembly overview – heater and air conditioning unit
  172
• 5.3 Assembly overview – evaporator housing
  179
• 5.4 Assembly overview - flaps and partitions in air distribution housing
  180
• 5.5 Removing and installing heater and air conditioning unit
  183
• 5.6 Dismantling and assembling heater and air conditioning unit
  189
• 5.7 Removing and installing air distribution housing
  190
• 5.8 Removing and installing holder for heater and air conditioning unit
  191
• 5.9 Removing and installing evaporator
  193
• 5.10 Removing and installing fresh air blower control unit J126
  194
• 5.11 Removing and installing dust and pollen filter
  196
• 5.12 Removing and installing fresh air blower V2
  200
• 5.15 Removing and installing heat exchanger
  207
• 5.16 Removing and installing coolant pipes on heat exchanger
  228
• 5.17 Removing and installing evaporator temperature sensor G308
  232
• 5.18 Checking condensation drain
  234
• 5.19 Removing and installing condensation drain
  235
• 5.20 Removing and installing baffle plate
  237
• 6 Air duct
  238
• 6.1 Assembly overview – air duct and air distribution in passenger compartment
  238
• 6.2 Removing and installing fresh air intake
  239
• 6.3 Removing and installing air intake duct
  241
• 6.4 Removing and installing driver side footwell vents
  242
• 6.5 Removing and installing front passenger side footwell vents
  244
• 6.6 Removing and installing rear footwell vent
  246
• 6.7 Removing and installing air duct for rear vent
  247
• 6.8 Removing and installing air duct for rear centre console vent
  247
• 6.9 Checking forced ventilation for passenger compartment
  248
• 6.10 Removing and installing forced ventilation for passenger compartment
  248
• 6.11 Removing and installing air duct for defroster vent
  249
• 6.12 Removing and installing air duct for centre vent
  250
• 7 Coolant circuit
  251
• 7.1 Connection diagram - high-voltage heater
  251
• 7.2 Assembly overview - high-voltage heater (PTC) ZX17
  256
• 7.3 Removing and installing high voltage heater (PTC) ZX17
  257
• 7.4 Removing and installing coolant changeover valve 1 N632
  264
• 7.5 Removing and installing coolant valve for high-voltage battery N688
  264
• 7.6 Removing and installing coolant valve for high-voltage battery V590
  264
• 8 Operating and display unit
  265
• 8.1 Overview of operating and display unit
  265
• 8.2 Removing and installing operating and display unit
  272
• 9 Other controlling and regulating components
  275
• 9.1 Removing and installing sunlight penetration photosensor G107
  275
• 9.2 Removing and installing external air quality and humidity sensor G935
  276
• 9.3 Removing and installing ambient temperature sensor G17
  278
• 9.4 Removing and installing humidity sender for air conditioning system G260
  278
• 9.5 Removing and installing left vent temperature sender G150
  278
• 9.6 Removing and installing right vent temperature sender G151
  280
• 9.7 Removing and installing rear vent temperature sender G174
  281
• 9.8 Removing and installing footwell vent temperature sender G192
  282
• 9.9 Removing and installing heater and air conditioning system control unit J979
  283