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128
T-305
12.8 AIR SAMPLE FILTER
WARNING
Low oxygen levels inside container. Venti-
late container before entering. Stay away
from doors while venting.
a. Removing the Air Sample Filter Element
When replacing the air sample filter element it can be
accessed in two ways: through the right-hand side
evaporator access panel (see Figure 56, page 89); or
through the inside of the container by lowering the upper
evaporator panel (see Figure 57, page 90).
WARNING
Make sure power to the unit is OFF and the
power plug is disconnected and tagged be-
fore servicing.
1. Follow container venting procedures before perform-
ing any maintenance on the air sample filter element.
2. By hand, unscrew and remove the filter cup from the
bottom of the air sample filter assembly (item 1,
Figure 80).
3. Remove the filter element from the filter assembly.
b. Replacing the Air Sample Filter Element
1. Install the air sample filter element by reversing the
above steps.
12.9 OXYGEN SENSOR
WARNING
Low oxygen levels inside container. Venti-
late container before entering. Stay away
from doors while venting.
a. Removing the Oxygen Sensor
When replacing the oxygen sensor it can be accessed in
two ways: through the right-hand side evaporator
access panel (see Figure 56, page 89); or through the
inside of the container by lowering the upper evaporator
panel (see Figure 57, page 90).
WARNING
Make sure power to the unit is OFF and the
power plug is disconnected and tagged be-
fore servicing.
1. Follow container venting procedures before perform-
ing any maintenance on the oxygen sensor (item 4,
Figure 80).
2. Remove the cushion clamp and screws (item 3) that
secure the oxygen sensor.
3. Cut the wire tie that secures the wiring to the oxygen
sensor body.
4. Unplug the wiring connector from the receptacle.
5. Remove the oxygen sensor from the oxygen sensor
housing (item 2).
b. Replacing the Oxygen Sensor
1. Install the oxygen sensor by reversing the above
steps.
2. Calibrate the oxygen sensor.
1
2
3
4
1. Air Sample Filter Assembly and Cup
2. Oxygen Sensor Housing
3. Cushion Clamp and Screws (
#10-24 x 1/2 lg
)
4. Oxygen Sensor
Figure 80. Solenoid Manifold Valve and Sensor
Assemblies
12.10 CARBON DIOXIDE SENSOR
WARNING
Low oxygen levels inside container. Venti-
late container before entering. Stay away
from doors while venting.
a. Removing the CO
2
Sensor
When replacing the CO
2
sensor it can be accessed in
two ways: through the right-hand side evaporator
access panel (see Figure 56, page 89); or through the
inside of the container by lowering the upper evaporator
panel (see Figure 57, page 90). Refer to Figure 81,
page 129 for the physical location of the CO
2
sensor.
WARNING
Make sure power to the unit is OFF and the
power plug is disconnected and tagged be-
fore servicing.
1. Follow container venting procedures before preform-
ing any maintenance on the CO
2
sensor.
2. Remove the electrical connector, and inlet and outlet
tubes from the body of the sensor (item 1, Figure 81,
page 129).
3. Loosen the screws (item ) which holds the CO
2
sen-
sor to the fan deck bracket.
4. Install replacement CO
2
sensor by reversing steps 3
thru 6.
5. Run Pre-Trip 6--0 to zero calibrate the new CO
2
sen-
sor.
Summary of Contents for 69NT40-489-100 Series
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Page 14: ...Safety 10 T 305...
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Page 50: ...26 T 305 Figure 12 Standard Configuration Report...
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Page 167: ...143 T 305 Based on drawings 62 10526 Rev and 62 10736 Rev Figure 90 Electrical Schematic CA...
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