Servicing The Main Evaporator And Heater Coil; Removing The Condenser Assembly; Servicing The Condenser Coil; Servicing The Condenser Motor - Carrier 68G5-105 Series Operation & Service Manual

4.20 SERVICING THE MAIN EVAPORATOR AND
HEATER COIL
a. Drain engine coolant from the heater coil.
b. Pump down low side of the HVAC system. (Refer to
paragraph 4.4.1.)
c. Remove remaining refrigerant. (Refer to paragraph
4.4.)
d. Remove the evaporator motor by following paragraph
4.17 steps a. thru f.
e. Disconnect all remaining electrical connections,
move wires out of the way.
f. Remove the evaporator electrical panel assembly.
g. Remove the liquid line (3 connection points) and the
discharge line (2 connection points) that pass thru the
evaporator and connect to the evaporator.
h. Disconnect and remove the suction line.
i. Disconnect and remove the heater hoses.
j. Remove the door frame surrounding the evaporator
enclosure.
k. Remove the four bolts that secure the coil bracket to
the drain pan. Leave the coil bracket bolted to the
evaporator coil until the coil has been removed from
the coach.
WARNING
WHEN MOVING THE COIL CARE MUST
BE TAKEN TO AVOID PERSONAL INJURY
BECAUSE OF THE WEIGHT OF THE COIL.
l. Brace the top of the coil hold it in position.
m.Remove the four bolts that secure the top of the coil to
the evaporator housing.
n. Rotate the top of the coil till the coil is horizontal and
slide out of the evaporator housing.
o. Re-install by performing the above procedure in
reverse.

4.21 REMOVING THE CONDENSER ASSEMBLY

a. Remove two side access panels from rear of the last
baggage bay.
b. Remove and reclaim the entire refrigerant charge.
(Refer to paragraph 4.4.2.)
c. Turn main battery disconnect switch to OFF position
and lock.
d. Disconnect all electrical leads to the module.
e. Disconnect refrigerant lines to the module.
f. Remove the door latch stud to the right side of the
condenser compartment.
g. Remove the front panel and the eight screws
fastening the condenser to the coach.
h. Remove the stabilizing bracket on the top of the
condenser.
i. Remove the eight screws securing the condenser
door hinges to the frame.
j. Remove condenser module by sliding out on
mounting rails.

4.22 SERVICING THE CONDENSER COIL

a. Remove the condenser assembly from the coach.
(Refer to paragraph 4.21)
b. Remove side panel (with control box).
c. Remove front shroud and panel assemblies.
d. Unbraze coil/tubing connections and roll front module
assembly forward to provide clearance for coil
removal.
e. Remove condenser coil.
f. Repair or replace the condenser coil.
g. Re-install by performing the above procedure in
reverse.

4.23 SERVICING THE CONDENSER MOTOR

a. Turn main battery disconnect switch to OFF position
and lock.
b. Remove appropriate front condenser grill.
c. Remove fan blade, secure the shaft key to the motor
shaft or fan hub slot.
d. Disconnect the wires to the motor.
e. Remove the four motor base mounting screws.
f. Remove the motor and place on workbench.
g. Repair or replace defective component(s), as
required.
h. For brush inspection/replacement refer to paragraph
4.19.
i. Re-install by performing the above procedure in
reverse.

4.24 SERVICING THE DRIVER CONTROL BOX

The driver control box is located behind the return air
panel below the passenger side dash and under the
right headlight. (See Figure 4-10.) Remove the return
air panel by removing the eight screws holding the panel
in place. Remove and service the control box by
performing the following procedure:
HEADLIGHT
DRIVER
CONTROL
BOX
Figure 4-10. Removing Driver Control Box
a. Turn main battery disconnect switch to OFF position
and lock.
4-13 T-312