Carrier VECTOR 1550 Series Operation & Service Manual page 230

g. Rotate the compressor to gain access to the power
plug. Remove the power plug retaining clip (see
Figure 8-11) by pulling out gently on the left side (to
clear the shorter left locking tab and rotate the right
locking tab) and then slide up and off the plug. Pull
the plug out and away from the compressor to re-
move.
STEP 1
Figure 8-12. Compressor Plug Retaining Clip
Inspect the power plug terminals to ensure
they are not deformed or have any signs of
heat or arcing. If any damage is noted, replace
the power cable.
h. Remove (slide out) the old compressor from the unit
and slide the new compressor into the unit. Refer to
Figure 8-10.
DO NOT add any oil to the replacement com-
pressor. Replacement compressor is shipped
with full oil charge of 60 oz.
i.. Install the "D" ring into the square groove of the
power plug
j. Inject a small amount of Dupont Krytox Performance
Lubricant into each of the pin connections in the
power plug. For ease of installation and to prevent
the "D" ring from rolling, use a small amount of the
lubricant to lubricate the outside radius of the "D"
ring.
k. Align the power plug with the cutout in the terminal
fence. Insert the power plug at a slight angle allow-
ing the "D" ring to start at the lower portion of the
terminal fence. Apply even pressure on the back of
the power plug until the flat surface of the plug seats
against the outer face of the terminal fence.
l. Reinstall the plug retaining bracket or molded plug
retainer as required.
m. Install the four base-mounting bolts loosely.
n. Place new Teflon seals at the compressor suction
and discharge ports. Lubricate the O-ring, back side
of sleeves and coupling nut and put in place at the
economizer line connection port. Hand tighten all
three connections.
o. Torque the four base-mounting screws to 126 Nm
(93 ft-lbs.).
62-61753-21
STEP 2
NOTE
NOTE
p. Using a backup wrench, torque the compressor
connections as follows:
Service Valve / Connection
Suction and Discharge
Rotalocks
Economizer Connection
q. Connect the new compressor discharge tempera-
ture sensor (CDT) connector. Wire-tie any loose wir-
ing as appropriate.
r. Backseat the suction and discharge service valves.
Leak check, evacuate the unit and charge in ac-
cordance with sections 8.5.2, 8.5.3 & 8.5.4.
The scroll compressor achieves low suc-
tion pressure very quickly. Do not use the
compressor to evacuate the system below
0 psig. Never operate the compressor with
the suction or discharge service valves
closed (frontseated). Internal damage will
result from operating the compressor in a
deep vacuum.
s. Following installation of a replacement compressor,
the oil level in the unit may be above the required
level. Adjust the oil level in accordance with the in-
structions packaged with the replacement compres-
sor.
8.6.2 Evaporator Coil
Cleaning
The use of recycled cardboard cartons is increasing
across the country. The recycled cardboard cartons
create much more fiber dust during transport than
"new" cartons. The fiber dust and particles are drawn
into the evaporator where they lodge between the
evaporator fins. If the coil is not cleaned on a regular
basis, sometimes as often as after each trip, the ac-
cumulation can be great enough to restrict air flow,
cause coil icing, repetitive defrosts and loss of unit
capacity. Due to the "washing" action of normal defrost
the fiber dust and particles may not be visible on the
face of the coil but may accumulate deep within.
It is recommended that the evaporator coil be cleaned
on a regular basis, not only to remove cardboard dust,
but to remove any grease or oil film which may coat
the fins and prevent water from draining into the drain
pan.
Cardboard fiber particles after being wetted and dried
several times can be very hard to remove. Therefore,
several washings may be necessary.
a. Remove rubber check valves (Kazoo) from drain
lines on front of trailer.
b. Spray coil with a mild detergent solution (such as
Oakite 202) or any good commercial grade automat-
ic dish washer detergent such as Electrosol or Cas-
cade, let the solution stand for a few minutes and
8-18
Torque Value
109 to 136 Nm
(80 to 100 ft-lbs.)
32 to 36 Nm
(24 to 27 ft-lbs.)
CAUTION