Car air conditioning system Land Rover Discovery 1
Air conditioning system
Location of system components 1 - compressor, 2 - condenser, 3 - receiver-dryer, 4 - evaporator, 5 - high-pressure service connection, 6 - low-pressure service connection, 7 - dual pressure switch, 8...
Location of system components 1 - compressor, 2 - condenser, 3 - receiver-dryer, 4 - evaporator, 5 - high-pressure service connection, 6 - low-pressure service connection, 7 - dual pressure switch, 8...
Air conditioning system — description
The air conditioning system is designed to supply cooled and dehumidified air to the passenger compartment, taken from inside or outside the vehicle. The flow rate of cooled air is changed by...
The air conditioning system is designed to supply cooled and dehumidified air to the passenger compartment, taken from inside or outside the vehicle. The flow rate of cooled air is changed by...
Air conditioning system control
The air conditioning control system contains a relay, thermostat, pressure switch and control panel. The pressure switch stops power supply to the compressor clutch when the refrigerant pressure...
The air conditioning control system contains a relay, thermostat, pressure switch and control panel. The pressure switch stops power supply to the compressor clutch when the refrigerant pressure...
Air conditioning system malfunctions
Malfunction Cause Elimination A. The heater fan does not work or the fan speed is low. 1. Low supply voltage. 2. The fuse or relay is faulty. 3. Poor electrical contact. 4. The switch is faulty. 5....
Malfunction Cause Elimination A. The heater fan does not work or the fan speed is low. 1. Low supply voltage. 2. The fuse or relay is faulty. 3. Poor electrical contact. 4. The switch is faulty. 5....
General instructions
The air conditioning system uses R134a refrigerant. Attention: 1. Wear protective clothing when working with the air conditioning system. Do not smoke or carry out welding work. 2. Refrigerant R134a...
The air conditioning system uses R134a refrigerant. Attention: 1. Wear protective clothing when working with the air conditioning system. Do not smoke or carry out welding work. 2. Refrigerant R134a...
System maintenance
Please exercise caution when working with the system. Do not suspend system components by tubes, capillaries or wires. It is prohibited to twist or pinch the system hoses. When tightening tubes and...
Please exercise caution when working with the system. Do not suspend system components by tubes, capillaries or wires. It is prohibited to twist or pinch the system hoses. When tightening tubes and...
Replacing the refrigerant
1 - high pressure service nipple, 2 - low pressure service nipple. 1. Connect the filling station to the service fittings of the vehicle's air conditioning system. 2. Carry out refrigerant removal...
1 - high pressure service nipple, 2 - low pressure service nipple. 1. Connect the filling station to the service fittings of the vehicle's air conditioning system. 2. Carry out refrigerant removal...
Leak testing
Checking the system for leaks (hose and tube connection points, compressor seal, condenser and evaporator tubes, etc.) carried out using an electronic leak detector for R143a refrigerant. Caution:...
Checking the system for leaks (hose and tube connection points, compressor seal, condenser and evaporator tubes, etc.) carried out using an electronic leak detector for R143a refrigerant. Caution:...
Checking functionality
Open the hood and doors of the car. Turn on the air conditioner. Set the temperature control to the maximum cooling position, the heater fan speed is at maximum. Change the air intake location to...
Open the hood and doors of the car. Turn on the air conditioner. Set the temperature control to the maximum cooling position, the heater fan speed is at maximum. Change the air intake location to...
Receiver-dryer
Caution: Remove the plugs from the new dehumidifier immediately before connecting the air conditioning system hoses. The maximum time that the receiver fittings remain open is 15 minutes. 1....
Caution: Remove the plugs from the new dehumidifier immediately before connecting the air conditioning system hoses. The maximum time that the receiver fittings remain open is 15 minutes. 1....
Air conditioner switch
1. Remove the center ventilation grille from the front panel. 2. Disconnect the switch connector. 3. Pull the switch out of the panel. 4. Installation is carried out in reverse order.
1. Remove the center ventilation grille from the front panel. 2. Disconnect the switch connector. 3. Pull the switch out of the panel. 4. Installation is carried out in reverse order.
Double pressure switch
1. Disconnect the battery. 2. Discharge the air conditioning system. 3. Disconnect the switch connector. 4. Turn the switch out, hold the switch adapter with the second key. 5. Remove the sealing...
1. Disconnect the battery. 2. Discharge the air conditioning system. 3. Disconnect the switch connector. 4. Turn the switch out, hold the switch adapter with the second key. 5. Remove the sealing...
Compressor — removal and installation
1. Disconnect the battery. 2. Discharge the air conditioning system. 3. Loosen the screws securing the central part of the fan diffuser. 4. Remove the central part of the diffuser. The V8i engine is...
1. Disconnect the battery. 2. Discharge the air conditioning system. 3. Loosen the screws securing the central part of the fan diffuser. 4. Remove the central part of the diffuser. The V8i engine is...
Capacitor — removal and installation
1. Disconnect the battery. 2. Discharge the air conditioning system. 3. Remove the front radiator grille. 4. Remove the battery. 5. Remove the radiator and oil coolers. 6. Disconnect the high and low...
1. Disconnect the battery. 2. Discharge the air conditioning system. 3. Remove the front radiator grille. 4. Remove the battery. 5. Remove the radiator and oil coolers. 6. Disconnect the high and low...
Condenser fans
1. Remove the capacitor. 2. Unscrew the 4 fan diffuser mounting bolts. 3. Unscrew the 4 fan motor mounting bolts. 4. Remove the fan and motor assembly. 5. Unscrew the 3 screws securing the fan...
1. Remove the capacitor. 2. Unscrew the 4 fan diffuser mounting bolts. 3. Unscrew the 4 fan motor mounting bolts. 4. Remove the fan and motor assembly. 5. Unscrew the 3 screws securing the fan...
Heater-air conditioner unit
1. Disconnect the battery. 2. Drain the coolant. 3. Discharge the air conditioning system. 4. Remove the front panel. 5. Disconnect the heater hoses from the engine cooling system pipes. 6....
1. Disconnect the battery. 2. Drain the coolant. 3. Discharge the air conditioning system. 4. Remove the front panel. 5. Disconnect the heater hoses from the engine cooling system pipes. 6....
Evaporator and expansion valve
1. Remove the heater. 2. Disconnect the two wires from the thermostat. 3. Secure the wires to the side. 4. Unscrew the 2 screws securing the heater tube bracket and secure them to the side. 5....
1. Remove the heater. 2. Disconnect the two wires from the thermostat. 3. Secure the wires to the side. 4. Unscrew the 2 screws securing the heater tube bracket and secure them to the side. 5....
Thermostat — removal and installation
1. Remove the heater. 2. Remove the air conditioner evaporator. 3. Disconnect the clips securing the top cover of the evaporator. 4. Remove the top cover. 5. Remove the sensor (sensitive element)...
1. Remove the heater. 2. Remove the air conditioner evaporator. 3. Disconnect the clips securing the top cover of the evaporator. 4. Remove the top cover. 5. Remove the sensor (sensitive element)...
Rear evaporator and fan
1. Discharge the air conditioning system. 2. Remove the evaporator from the upper ceiling light duct. 3. Remove the rear left mudguard. 4. Remove any dirt from the air conditioning system tube...
1. Discharge the air conditioning system. 2. Remove the evaporator from the upper ceiling light duct. 3. Remove the rear left mudguard. 4. Remove any dirt from the air conditioning system tube...
Rear air conditioner fan
1. Remove the rear evaporator and fan. 2. Loosen the two screws securing the high pressure control solenoid valve to the fan housing. 3. Disconnect the fan motor connector. 4. Remove the fan motor...
1. Remove the rear evaporator and fan. 2. Loosen the two screws securing the high pressure control solenoid valve to the fan housing. 3. Disconnect the fan motor connector. 4. Remove the fan motor...
Rear air conditioning control unit
1. Remove the lower luggage compartment trim panel. 2. Disconnect the control unit connector. 3. Remove the control unit from the bracket. 4. Installation is carried out in reverse order.
1. Remove the lower luggage compartment trim panel. 2. Disconnect the control unit connector. 3. Remove the control unit from the bracket. 4. Installation is carried out in reverse order.
High pressure control solenoid valve
1. Remove the rear evaporator. 2. Release the valve connector from the bracket clip. 3. Disconnect the valve connector. 4. Loosen the nuts securing the tubes to the valve and hold the valve with a...
1. Remove the rear evaporator. 2. Release the valve connector from the bracket clip. 3. Disconnect the valve connector. 4. Loosen the nuts securing the tubes to the valve and hold the valve with a...
Rear air conditioner expansion valve
1. Remove the evaporator with fan. 2. Remove the expansion valve insulator and sensing element. 3. Disconnect the clip securing the sensitive element. 4. Loosen the nut securing the tubes to the...
1. Remove the evaporator with fan. 2. Remove the expansion valve insulator and sensing element. 3. Disconnect the clip securing the sensitive element. 4. Loosen the nut securing the tubes to the...
Rear air conditioner evaporator
1. Remove the rear evaporator wiring. 2. Remove the upper ceiling light and evaporator air duct flange seal. 3. Unscrew the screw securing the clip of the discharge tube "P" to the body. 4. Unscrew...
1. Remove the rear evaporator wiring. 2. Remove the upper ceiling light and evaporator air duct flange seal. 3. Unscrew the screw securing the clip of the discharge tube "P" to the body. 4. Unscrew...
Rear air conditioner thermostat
1. Remove the rear evaporator wiring. 2. Remove the upper ceiling light and evaporator air duct flange seal. 3. Unscrew the 2 screws securing the relay bracket and secure the relay to the side. 4....
1. Remove the rear evaporator wiring. 2. Remove the upper ceiling light and evaporator air duct flange seal. 3. Unscrew the 2 screws securing the relay bracket and secure the relay to the side. 4....
Rear evaporator wiring
1. Remove the rear evaporator and fan. 2. Loosen the screws securing the wiring support clips to the body. 3. Remove the clips. 4. Disconnect the connectors of the four relays. 5. Disconnect the...
1. Remove the rear evaporator and fan. 2. Loosen the screws securing the wiring support clips to the body. 3. Remove the clips. 4. Disconnect the connectors of the four relays. 5. Disconnect the...
Rear air conditioner switch
1. Open the back door. 2. Remove the switch block from the ceiling panel. 3. Disconnect the wiring connectors from the switch block. 4. Remove the switch box from the vehicle. 5. Remove the fan...
1. Open the back door. 2. Remove the switch block from the ceiling panel. 3. Disconnect the wiring connectors from the switch block. 4. Remove the switch box from the vehicle. 5. Remove the fan...
Rear air conditioner fan switch
1. Open the back door. 2. Remove the switch block from the ceiling panel. 3. Disconnect the wiring connectors from the switch block. 4. Remove the switch box from the vehicle. 5. Remove the fan...
1. Open the back door. 2. Remove the switch block from the ceiling panel. 3. Disconnect the wiring connectors from the switch block. 4. Remove the switch box from the vehicle. 5. Remove the fan...
Air conditioner switch position indicator lamp
1. Remove the rear air conditioner switch. 2. Remove the switch bulb. 3. Installation is carried out in reverse order.
1. Remove the rear air conditioner switch. 2. Remove the switch bulb. 3. Installation is carried out in reverse order.
Rear air conditioner switch block illumination lamp
1. Remove the switch block. 2. Remove the lamp base from the switch block. 3. Remove the lamp. 4. Installation is carried out in reverse order.
1. Remove the switch block. 2. Remove the lamp base from the switch block. 3. Remove the lamp. 4. Installation is carried out in reverse order.
Center Air Vent (5-door models with rear air conditioning)
1. Remove the ceiling panel. 2. Disconnect the wire bundle from the air duct 3. Unscrew the 5 screws securing the air duct to the body. 4. Remove the air duct. 5. Installation is carried out in...
1. Remove the ceiling panel. 2. Disconnect the wire bundle from the air duct 3. Unscrew the 5 screws securing the air duct to the body. 4. Remove the air duct. 5. Installation is carried out in...
Upper rear door air vent
1. Remove the rear door upper trim panel. 2. Remove the two ventilation grilles from the trim panel. 3. Loosen the screw securing the air duct to the trim panel. 4. Remove the air duct. 5....
1. Remove the rear door upper trim panel. 2. Remove the two ventilation grilles from the trim panel. 3. Loosen the screw securing the air duct to the trim panel. 4. Remove the air duct. 5....
Upper ceiling light duct
1. Remove the evaporator from the upper ceiling light duct. 2. Remove the upper trim panel of the rear door. 3. Disconnect the clip securing the air duct to the body. 4. Loosen the air duct mounting...
1. Remove the evaporator from the upper ceiling light duct. 2. Remove the upper trim panel of the rear door. 3. Disconnect the clip securing the air duct to the body. 4. Loosen the air duct mounting...
Air duct from the evaporator to the upper ceiling duct
1. Remove the lower luggage compartment trim panel. 2. Disconnect the 4 clips securing the air duct to the body. 3. Disconnect the air duct from the evaporator. 4. Disconnect the evaporator duct from...
1. Remove the lower luggage compartment trim panel. 2. Disconnect the 4 clips securing the air duct to the body. 3. Disconnect the air duct from the evaporator. 4. Disconnect the evaporator duct from...
Rear A/C Blower Motor Resistor
1. Remove the rear evaporator and fan. 2. Disconnect the radiator connector. 3. Unscrew the 2 screws securing the resistor to the fan motor housing. 4. Remove the resistor. 5. Installation is carried...
1. Remove the rear evaporator and fan. 2. Disconnect the radiator connector. 3. Unscrew the 2 screws securing the resistor to the fan motor housing. 4. Remove the resistor. 5. Installation is carried...
Tightening torques for threaded connections (Nm)
Compressor flange bolts - 10 Receiver-drier hose bolts - 6 Double pressure switch - 11 Fitting nuts (M16) - 14 Fitting nuts (M20) - 22 Fitting nuts (M24) - 33
Compressor flange bolts - 10 Receiver-drier hose bolts - 6 Double pressure switch - 11 Fitting nuts (M16) - 14 Fitting nuts (M20) - 22 Fitting nuts (M24) - 33
Air conditioner filling tanks
Total amount of oil: 180 ml Total amount of refrigerant: 0.9 kg Total refrigerant capacity with rear air conditioner: 1.15 kg
Total amount of oil: 180 ml Total amount of refrigerant: 0.9 kg Total refrigerant capacity with rear air conditioner: 1.15 kg
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