Carrier 69NT40-489-100 Series, Руководство по эксплуатации и обслуживанию

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113
T-305
ber to the left. The user may then press the DOWN
ARROW to repeat the test, the UP ARROW to skip to
the next test or the PRE--TRIP key to terminate test-
ing. The unit will wait indefinitely, until the user manu-
ally enters a command.
c. TO RUN AN INDIVIDUAL TEST: Scroll through the
selections by pressing the UP ARROW or DOWN
ARROW keys to display an individual test code.
Pressing ENTER when the desired test code is dis-
played.
1. Individually selected tests, other than the LED/Dis-
play test, will perform the operations necessary to
verify the operation of the component. At the conclu-
sion, PASS or FAIL will be displayed. This message
will remain displayed for up to three minutes, during
which time a user may select another test. If the
three minute time period expires, the unit will termi-
nate pre-trip and return to control mode operation.
2. While the tests are being executed, the user may ter-
minate the pre-trip diagnostics by pressing and hold-
ing the PRE-TRIP key. The unit will then resume nor-
mal operation. If the user decides to terminate a test
but remain at the test selection menu, the user may
press the UP ARROW key. When this is done all test
outputs will be de-energized and the test selection
menu will be displayed.
d. Pre-Trip Test Results
At the end of the pre-trip test selection menu, the
message “P,” “rSLts” (pre--trip results) will be displayed.
Pressing the ENTER key will allow the user to see the
results for all subtests (i.e., 1-0, 1-1, etc). The results will
be displayed as “PASS” or “FAIL” for all the tests run to
completion since power up. If a test has not been run
since power up, “
-- -- -- -- --
” will be displayed.
10.5 CONTROLLED ATMOSPHERE SET POINT
SELECTION
Press the DISPLAY FREEZE key when the O
2
or CO
2
set point is displayed. Press the UP/DOWN ARROW
keys until the left window displays the desired set point
value. This value will flash for five seconds. Press the
ENTER key within the five seconds to enter new set
point. If the ENTER key is not pressed, the set point will
remain at the previously entered value.
Oxygen and CO2 concentrations will alternate for
approximately 5 seconds each, with setpoint on the left
and concentration on the right. Other messages,
indicating improper system operation, are sometimes
alternated for a third 5 second period along with the
Oxygen and CO2 information. If any of the alarm
conditions are active, ’AL##’ is displayed on the left
display, where ’##’ indicates the most recent active
alarm.
When gas sensor values are not available for display,
’----------’ will be shown rather than the gas concentration.
The normal display will not show an O2 reading less
than 0.0 or higher than 20.9%, nor a CO2 reading less
than 0.0% or higher than 100.0%.
The five second rotations of the default display can be
overridden with the DISPLAY FREEZE key. Pressing
the DISPLAY FREEZE key will freeze the current
display for 1 minute. After pressing the display freeze
key again, the display will scroll to the next display and
resume alternating the displays (unfreeze).
10.6 CONTROLLED ATMOSPHERE SYSTEM OP-
ERATION
General operations for controlling the CO2 and O2
levels in are accomplished by the controller through the
following controller functions.
a.
STANDBY (LOCKOUT) The Temperature (refrig-
eration) Controller is preventing the CA Controller
from operating, due to pre-set requirements that are
not yet satisfied. Refer to section 10.2.a., page 111.
b. OXYGEN CONTROL STATE 1 The oxygen con-
centration level is less than set point.
c. OXYGEN CONTROL STATE 2 The oxygen con-
centration level is greater than set point.
d. CARBON DIOXIDE CONTROL STATE 1 The car-
bon dioxide concentration level is less than the CO
2
set point.
e. CARBON DIOXIDE CONTROL STATE 2 The car-
bon dioxide concentration level is greater than the
CO
2
set point.
f. O
2
AIR CAL (Auto. Trigger) An O
2
sensor span cal-
ibration is performed automatically 2 hours after start-
up and then once every 24 hours.
Other control variables are available to the user though
the controller keypad, refer to Table 20 page 98 for more
information.
10.7 CONTROLLED ATMOSPHERE (CA) SYSTEM
CONTAINER VENTING PROCEDURE
WARNING
Low oxygen levels inside container. Venti-
late container before entering. Stay away
from doors while venting.
Venting the container via the CA Controller
(Normal Operating Conditions, i.e., w/power)
1. Set the CAS switch and container ST switch to the
ON position (I).
2. On the keypad depress the VENT key, and then de-
press the ENTER key.
3. Display will show “OPEn Air”. Manually open the
fresh air makeup vent.
4. Turn the fresh air makeup vent to 100% (fully open),
and then depress the ENTER key on the keypad.
Avoid any direct breathing of the venting gases from
the air makeup vent.
5. Allow the refrigeration unit to run. This allows the
evaporator fans to exchange low-oxygen level air
with ambient air.
6. The door interlock system will open when O
2
reach-
es 20
±
2%.
7. Open both of the container rear doors and pull back
the curtain to facilitate the clearing of the hazardous
atmosphere. Step away from the container rear
doors. Continue refrigeration operation for five min-
utes prior to entry or unloading of the container. Do
not close doors. (Wait 45 minutes before climbing on
contents inside of the container.)