Defender 90 NAS. Manual — part 92
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
2. Release securing screw and remove relay from
side of evaporator casing.
Refit
3. Fit screw and securing relay to side of casing.
4. Connect multiplug to relay.
5. Carry out system test.
See Adjustment,
System test
FASCIA DUCT BEZEL
Service repair no - 82.20.79
Remove
1. Lever under each bottom corner and remove
cold air vents from bezel.
2. Remove screw securing underside of bezel to
panel.
3. Remove 3 screws securing inside of bezel to
panel.
4. Lift bezel away from evaporator casing.
5. Withdraw capillary tube from evaporator fins.
6. Disconnect multiplug from fan interlock relay.
7. Remove 2 screws securing cover to rear of
bezel.
82
AIR 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 Lucars to temperature control switch.
19. Position capillary tube to RH side of bezel.
20. Fit screws securing cover to rear of bezel.
21. Connect multiplug to fan interlock relay.
22. Position bezel assembly and insert capillary tube
60 mm, 2.5 in into evaporator fins
23. Fit bezel assembly to panel and above
evaporator casing, secure with screws.
24. Fit cold air vents.
25. Carry out system test.
See Adjustment,
System test
AIR CONDITIONING
9
REPAIR
EXPANSION VALVE
Service repair no - 82.25.01
Remove
1. Remove evaporator.
See evaporator
2. Using a backing spanner, loosen union nut and
remove high pressure pipe.
3. Discard ’O’ ring.
4. Pull insulation away from capillary tube coil and
low pressure pipe.
5. Loosen clip and withdraw capillary tube coil from
low pressure pipe.
6. Loosen capillary tube union and disconnect
union from low pressure pipe. Discard ’O’ ring.
7. Using a backing spanner, loosen union nut and
remove expansion valve from pipe. Discard ’O’
ring.
Refit
8. Lubricate NEW ’O’ rings with refrigerant oil and
fit to pipe ends.
9. Fit expansion valve to pipe, DO NOT tighten
union nut.
10. Connect capillary tube and tighten union nut.
11. Position capillary tube coil on low pressure pipe
and secure with clip.
12. Wrap capillary coil and union with ’Prestite’ tape.
13. Connect high pressure pipe to expansion valve,
carefully align with low pressure pipe and tighten
union nut.
14. Tighten expansion valve union nut.
15. Fit evaporator.
See evaporator; Refit
16. Carry out system test.
See Adjustment,
System test
BLOWER MOTOR ASSEMBLY
Service repair no - 82.25.14
Remove
1. Remove evaporator.
See evaporator
2. Move passenger seat fully rearward.
3. Position evaporator unit above centre console
and seat panel.
4. Disconnect Lucars (B and O wires) from blower
motor.
5. Remove screws securing blower units to casing.
6. Release blower unit flanges from casing, sealed
with sealant.
7. Disconnect Lucars from resistor unit.
NOTE: Wire positions: G, U and R wires.
8. Remove blower motor unit.
Do not carry out further dismantling if component
is removed for access only.
9. Remove screws securing resistor unit to blower
motor. Note alignment of resistor unit.
10. Remove resistor unit and bracket.
11. Fit resistor unit to blower motor.
82
AIR CONDITIONING
10
REPAIR
Refit
12. Clean sealant from blower flanges.
13. Apply a bead of Silicone Sealant around each
blower flange.
14. Connect Lucars to resistor unit in correct order.
15. Position blower flanges on evaporator casing
and secure with screws.
16. Connect Lucars (B and O wires) to blower motor.
17. Fit evaporator.
See evaporator
18. Carry out system test.
See Adjustment,
System test
EVAPORATOR
Service repair no - 82.25.20
Remove
1. Disconnect battery negative lead.
2. Recovery refrigerant from air conditioning
system.
See Adjustment, Refrigerant
recovery recycling recharging
3. Remove fascia duct bezel.
See fascia duct
bezel
4. Remove 3 nuts securing evaporator casing to
mounting bracket.
5. Disconnect drain tube from drain pipe on LH side
of casing.
6. Position 2 heater hoses to side of air intake tube.
WARNING: Wear eye and hand protection
when disconnecting components
containing refrigerant.
7. Using a backing spanner, loosen union nut from
evaporator return pipe and disconnect. Discard
’O’ ring.
8. Using a backing spanner, loosen union nut from
evaporator feed pipe and disconnect. Discard ’O’
ring.
CAUTION: Plug the connections.
9. Ease 2 evaporator studs from their rubber
bushes, release grommet from bulkhead,
withdraw pipes from aperture and position
evaporator unit on floor.
10. Remove screw securing harness ’P’ clip to rear
of casing.
11. Disconnect Lucar (B wire) from motor.
12. Disconnect Lucars (G, U, and R wires) from
resistor unit.
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