Land Rover Defender 90 Workshop 2nd Edition Nas Rover Manual

AIR CONDITIONING
5
ADJUSTMENT AIR CONDITIONING SYSTEM - PERFORMANCE
TEST
WARNING: R134a is hazardousSee
Repair, General Precautions
.
Carry out this test with bonnet and doors or windows
open, air conditioning switched on, temperature
control set to cold and blower at maximum speed. Set
the air supply control to supply fresh air.
1.Close low pressure valve on refrigerant station.
2.Close high pressure valve on refrigerant station.
3.Connect a Refrigerant Station to the high and
low pressure servicing...

82AIR CONDITIONING
6
ADJUSTMENT SYSTEM TEST
1.Place the vehicle in a ventilated, shaded area
free from excessive draught, with the doors and
windows open.
2.Check that the surface of the condenser is not
restricted with dirt, leaves, flies, etc. Do not
neglect to check the surface between the
condenser and the radiator. Clean as necessary.
3.Switch on the ignition and the air conditioner air
flow control. Check that the blower is operating
efficiently at low, medium and high speeds.
Switch off the blower...

AIR CONDITIONING
1
REPAIR COMPRESSOR
Service repair no - 82.10.20
Remove
1.Disconnect battery negative lead.
2.Recover refrigerant from system.
See
Adjustment, refrigerant recovery recycling
recharging
3.Remove 2 bolts securing hose flanges to
compressor.
WARNING: Wear eye and hand protection
when disconnecting components
containing refrigerant. Plug all exposed
connections immediately.
4.Disconnect high pressure pipe from compressor.
5.Disconnect low pressure pipe from compressor.
6.Remove O ring from...

82AIR CONDITIONING
2
REPAIR CONDENSER
Service repair no - 82.15.07
Remove
1.Disconnect battery negative lead.
2.Recover refrigerant from system.
See
Adjustment, refrigerant recovery recycling
recharging
3.Remove condenser fan.See condenser fan
4.Remove 4 bolts securing cross-braces to top
panel and chassis brackets.
5.Remove 2 cross-braces.
6.Using a backing spanner, loosen union nut
securing inlet pipe to condenser and disconnect.
7.Using a backing spanner, loosen union nut
securing outlet pipe to...

AIR CONDITIONING
3
REPAIR RECEIVER DRIER
Service repair no - 82.17.01
Remove
CAUTION: If receiver drier is to be refitted,
the ports must be blanked off immediately
on disconnection. Exposed life of unit is
15 minutes.
1.Disconnect battery negative lead.
2.Recover refrigerant from system.
See
Adjustment, refrigerant recovery recycling
recharging
WARNING: Wear eye and hand protection
when disconnecting components
containing refrigerant.
3.Clean area around receiver drier connections.
4.Disconnect...

82AIR CONDITIONING
4
REPAIR TRINARY PRESSURE SWITCH
Service repair no - 82.20.04
Remove
1.Disconnect battery negative lead.
2.Recover refrigerant from system.
See
Adjustment, refrigerant recovery, recycling,
recharging
3.Access below front RH of vehicle: Disconnect
multiplug from switch.
4.Remove switch from adaptor.
WARNING: Wear eye and hand protection
when disconnecting components
containing refrigerant.
5.Remove O ring from switch and discard.
Refit
6.Lubricate NEW O ring with refrigerant oil and...

AIR CONDITIONING
5
REPAIR
4.Lift bezel away from evaporator casing
5.Withdraw capillary tube from evaporator fins.
6.Disconnect multiplug from fan interlock relay.
7.Remove securing screw and remove relay from
rear of bezel.
Refit
8.Fit screw and secure relay to rear of bezel.
9.Connect multiplug to fan interlock relay.
10.Position bezel assembly and insert capillary tube
60 mm, 2.5 in into evaporator fins.
11.Fit bezel assembly to panel and above
evaporator casing, secure with screws.
12.Fit cold air...

82AIR CONDITIONING
6
REPAIR CONTROL SWITCHES
Service repair no - 82.20.10 - Temperature Control
Switch
Service repair no - 82.20.11 - Fan Switch
Remove
1.Remove fascia duct bezel.
See fascia duct
bezel
2.Pull control knobs from switches.
3.Remove switch panel.
4.Remove nut securing switch to bezel.
5.Remove switch.
NOTE: Fan switch to left.
Refit
6.Fit temperature control switch. Position capillary
tube inside duct to RH side.
7.Fit and tighten nut securing switch to bezel.
8.Fit switch panel.
9.Fit...

AIR CONDITIONING
7
REPAIR RELAY - EVAPORATOR BLOWER
Service repair no - 82.20.27
Remove
1.Disconnect multiplug from relay.
NOTE: Connector wiring: B, G, N, S/P
2.Release securing screw and remove relay from
side of evaporator casing.
Refit
3.Fit screw and secure relay to side of casing.
4.Connect multiplug to relay.
5.Carry out system test.
See Adjustment,
System test
RELAY - COMPRESSOR
Service repair no - 82.20.51
Remove
1.Disconnect multiplug from relay.
NOTE: Connector wiring: G, B/W, N/R, N/W...

82AIR CONDITIONING
8
REPAIR
8.Disconnect 2 Lucars from temperature control
switch.
9.Disconnect multiplug from fan switch.
10.Remove bezel assembly.
Do not carry out further dismantling if component
is removed for access only.
11.Pull control knobs from switches.
12.Remove switch panel.
13.Remove nuts securing switches to bezel.
14.Remove temperature control switch.
15.Remove fan switch.
16.Transfer components to new panel.Refit
17.Position bezel assembly and connect multiplug
to fan switch.
18.Connect...