Carrier 69NT40-541-300, Операция и обслуживание, Страница: 82 / 152

T − 318 4 − 6
4.9 PRE − TRIP DIAGNOSTICIS
CAUTION
Pre-trip inspection should not be per-
formed with critical temperature cargoes in
the container.
CAUTION
When Pre − Trip key is pressed, economy,
dehumidification and bulb mode will be
deactivated. At the completion of Pre − Trip
activity, economy, dehumidification and
bulb mode must be reactivated.
Pre-Trip diagnostics provides automatic testing of the
unit components using internal measurements and
comparison logic. The program will provide a “PASS” or
“FAIL” display to indicate test results.
The testing begins with access to a Pre-trip selection
menu. The user may have the option of selecting one of
three automatic tests.
These tests will automatically perform a series of
individual Pre-trip tests. The user may also scroll down
to select any of the individual tests.
When only the short sequence is configured, it will
appear as “AUtO” in the display. Otherwise “AUtO1” will
indicate the short sequence and “AUtO2” will indicate
the long sequence. The test short sequence will run
tests P0 through P6. The long test sequence will run
tests P0 through P10.
A detailed description of the Pre-trip test codes is listed
in Table 3-7, page 3 − 36. If no selection is made, the
Pre-trip menu selection process will terminate
automatically. However, dehumidification and bulb
mode must be reactivated manually if required.
Scrolling down to the “rSLts” code and pressing ENTER
will allow the user to scroll through the results of the last
pre-trip testing run. If no pre-testing has been run (or an
individual test has not been run) since the unit was
powered up, “ −−−− ” will be displayed.
To start a Pre-trip test, do the following:
NOTE
1. Prior to starting tests, verify that unit
voltage (Cd07) is within tolerance and unit
amperage draw (Cd04, Cd05, Cd06) is
within expected limits. Otherwise, tests
may fail incorrectly.
2. All alarms must be rectified and cleared
before starting tests.
3.
.
Pre − trip may also be initiated via
communications. The operation is the
same as for the keypad initiation described
below except that should a test fail, the
Pre − trip mode will automatically terminate.
When initiated via communications, a
Pre − trip test may not be interrupted with an
arrow key, but the Pre − trip test can be
terminated with the PRE − TRIP key.
a. Press the PRE − TRIP key to accesses the Pre − trip
test selection menu.
b. TO RUN AN AUTOMATIC TEST: Scroll through the
selections by pressing the UP ARROW or DOWN
ARROW keys to display AUTO, AUTO 2 or AUTO 3
as desired and then press the ENTER key.
1. The unit will execute the series of tests without any
need for direct user interface. These tests vary in
length, depending on the component under test.
2. While tests are running, “P#-#” will appear on the
left display, where the #’s indicate the test number
and sub-test. The right display will show a count-
down time in minutes and seconds, indicating the
amount of time remaining in the test.
CAUTION
When a failure occurs during automatic
testing the unit will suspend operation
awaiting operator intervention.
When an automatic test fails, it will be repeated once . A
repeated test failure will cause “FAIL” to be shown on
the right display, with the corresponding test number 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 testing. The unit will wait
indefinitely until the user manually enters a command.
CAUTION
When Pre-Trip test Auto2 runs to comple-
tion without being interrupted, the unit will
terminate pre-trip and display “Auto 2”
“end.” The unit will suspend operation until
the user depresses the ENTER key!
When an Auto test runs to completion without a failure,
the unit will exit the Pre-trip mode and return to normal
control operation.
If configuration variable CnF42 is set to IN, a
DataCORDER trip start will be entered. If CnF42 is set
to OUT, the trip start will not be entered. However,
dehumidification and bulb mode must be reactivated
manually if required.