Service manual

Safety--4T-318
CAUTION
The unit will remain in the full cooling mode
as long as the emergency bypass switch is
in the BYPASS position and the MODE
SWITCH is in the FULL COOL position. If
the cargo may be damaged by low tempera-
tures, the operator must monitor container
temperature and manually cycle operation
as required to maintain temperature within
required limits.
CAUTION
The unit will remain in the DEFROST mode
as long as the emergency defrost switch is
in the DEFROST position. To prevent cargo
damage, the operator must monitor con-
tainer temperature and manually cycle op-
eration as required to maintain temperature
within required limits.
CAUTION
To prevent trapping liquid refrigerant in the
manifold gauge set, be sure set is brought
to suction pressure before disconnecting.
WARNING
Before disassembly of any external com-
pressor component, make sure to relieve
possible internal pressure by loosening the
bolts and tapping the component with a
soft hammer to break the seal.
CAUTION
Removing the compressor motor press-fit
stator in the field is not recommended. The
rotor and stator are a matched pair and
should not be separated.
CAUTION
The copper tube that connects to the oil
suction strainer extends out the bottom
with the bottom plate removed. Take pre-
cautions to avoid bending or breaking it
while changing crankcase positions.
CAUTION
Ensure that the thrust washer does not fall
off dowel pins while installing oil pump.
CAUTION
The set screw on the crankshaft must be
removed for this type of oil pump. (See
Figure 6-9.)
CAUTION
Use only Carrier Transicold approved
Polyol Ester Oil (POE) -- Castrol-Icematic
SW20 compressor oil with R-134a. Buy in
quantities of one quart or smaller. When
using this hygroscopic oil, immediately
reseal. Do not leave container of oil open or
contamination will occur.
CAUTION
Take necessary steps (place plywood over
coil or use sling on motor) to prevent motor
from falling into condenser coil.
CAUTION
DO NOT disassemble piston from NEW suc-
tion modulating valve powerhead assem-
bly. Doing so may result in damage to pis-
ton.
CAUTION
Do not remove wire harnesses from con-
troller unless you are grounded to the unit
frame with a static safe wrist strap.
CAUTION
Unplug all controller connectors before
performing arc welding on any part of the
container.
CAUTION
The unit must be OFF whenever a program-
ming card is inserted or removed from the
controller programming port.