30 - 4
Section B
9803/3280
Section B
30 - 4
Issue 1
Air Conditioning
Blower Unit - Removal and Replacement
The blower
W
is located inside the HVAC/air conditioning
unit and can be removed without having to remove the HVAC
unit from the machine.
The only user-serviceable part is the resistor which
determines the blower motor speed. Other faults, excluding
wiring faults, necessitate the replacement of the blower unit
complete.
Resistor replacement requires the removal of the blower unit
as follows:
Removal
1
Disconnect the battery.
2
Gain access to the HVAC unit by removing the right
hand side console and remove the HVAC unit top cover,
refer to
HVAC/ Air Conditioning Unit - Removal and
Replacement
Steps 2 and 3.
3
Disconnect the electrical connections to the blower.
4
Remove the screws securing the blower unit to
the HVAC unit housing.
5
Carefully withdraw the blower from the HVAC unit.
6
To remove the resistor, disconnect the electrical
connections and unscrew the resistor.
Replacement is the reverse of the removal procedure.
Freeze Protection Thermostat
- Removal and Replacement
The Thermostat
V
monitors the external temperature of the
evaporator and is located inside the HVAC/air conditionig
unit.
Removal
1
Disconnect the battery.
2
Gain access to the HVAC unit by removing the right
hand side console and remove the HVAC unit top cover,
refer to
HVAC/ Air Conditioning Unit - Removal and
Replacement
Steps 2 and 3.
3
Unclip the sensor wire from the evaporator and
gently remove the wire from between the fins.
4
Disconnect the electrical connections to the thermostat.
5
Remove the screws securing the thermostat to
the HVAC unit housing.
Replacement is the reverse of the removal procedure.
Evaporator Matrix
- Removal and Replacement
Note: Before removing the Evaporator Matrix, discharge
the system. Refer to Service Procedures, Air
Conditioning - Refrigerant Charging and Discharging.
The evaporator matrix
S
is located inside the HVAC/air
conditioning unit and can be removed without having to
remove the HVAC unit from the machine.
Remova
l
Removal of the evaporator matrix will require the assistance
of a refrigeration engineer or suitably trained person since
the refrigerant needs to be drained from the system.
1
Disconnect the battery.
2
Gain access to the HVAC unit by removing the right
hand side console and remove the HVAC unit top
cover, refer to
HVAC/Air Conditioning Unit - Removal
and Replacement
Steps 2 and 3.
3
Unclip the thermostat sensor wire from the
evaporator and gently remove the wire from
between the fins.
!
WARNING
The air conditioning system is a closed loop system and
contains pressurised refrigerant. No part of the system
must be disconnected except by a refrigeration engineer
or suitably trained person. You can be severely
frostbitten or injured by escaping refrigerant
4-3-4-1/2
4
Drain the refrigerant from the unit and remove all
pipe work (refrigerant and air) which will prevent the
unit from being withdrawn from the machine. Check
around the top of unit, rear, bottom and right side.
5
Carefully lift the evaporator matrix complete with
expansion valve
T
from the housing, bearing in mind
that a certain amount of resistance will be met due to
the stiction from the sealing putty.
Replacement is the reverse of the removal procedure.
