6-22
T-294-01
CAUTION
Do not allow moisture to enter wire splice
area as this may affect the sensor resistance.
n. Position sensor in unit per Figure 6-21 and check
sensor resistance as detailed in section 6.23.1.
o. Reinstall the cover (if present) that was removed in
step (b.) over wiring and probe holder.
NOTE
The P5 Pre-Trip test must be run to inactivate
the alarm (refer to section 3.2.1).
6.23.3 Replacing Sensor (RRS and RTS)
a. Turn unit power OFF and disconnect power supply.
b. Cut cable 5 cm (6 inches) from shoulder of defective
sensor and discard the defective probe only.
c. Cut one wire of existing cable 41 mm (1-5/8 inches)
shorter than the other wire.
d. Cut one replacement sensor wire (opposite color)
back 41 mm (1-5/8 inches). (See Figure 6-22.)
e. Strip back insulation on all wires 6.35 mm (1/4
inch).
f. Slide a large piece of heat shrink tubing over the
unit cable, and place the two small pieces of heat
shrink tubing, one over each wire, before adding
crimp fittings as shown in Figure 6-23.
g. Slip crimp fittings over dressed wires (keeping wire
colors together). Make sure wires are pushed into
crimp fittings as far as possible and crimp with
crimping tool.
h. Solder spliced wires with a 60% tin and 40% lead
Rosincore solder.
i. Slide heat shrink tubing over splice so that both
ends of tubing cover both ends of crimp as shown in
Figure 6-23.
j. Heat tubing, preferably with a flameless heat gun. If
not available, a propane torch will work
(caution
should be taken not to burn the heat shrink tubing or
wire insulation
). Make sure all seams are sealed
tightly against the wiring to prevent moisture
seepage.
k. Slide large heat shrink tubing over both splices and
shrink tubing and heat as in step (j).
CAUTION
Do not allow moisture to enter wire splice
area as this may affect the sensor resistance.
l. Check sensor resistance as detailed in section
6.23.1.
m. Reinstall the return sensor as shown in Figure 6-24.
For proper placement of the return sensor, be sure to
position the enlarged positioning section of the
sensor against the the side of the mounting clamp.
NOTE
The P5 Pre-Trip test must be run to inactivate
the alarm (refer to section 3.2.1).
Evaporator Grille
Return Sensor
Mounting Clamp
Enlarged Positioning
(Plastic) Section
Figure 6-24. Return Sensor Positioning
6.23.4 Checking Sensor (AMBS or DTS)
a. Turn unit OFF and disconnect power supply.
b. Refer to section 6.27 for removal of the Controller
module.
AMBS or DTS:
Using the plug connector marked “EC” that is
connected to the Controller module. Locate the wires
marked AMBS or DTS, depending on which sensor
needs to be replaced. Follow that wire to the connector
and using the pins of the plug, measure the ohms
resistance. Readings are shown in Table 6-5.
6.23.5 Replacing Sensor (AMBS or DTS)
a. Turn unit power OFF and disconnect power supply.
b. Cut wires to 25.4 cm (10 inches) from the back of
the mounting stud of the defective sensor and
discard.
c. Cut one of the two wires from step b 25.4 mm (1.0
inch) shorter than the other wire.
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