Carrier 69NT40-541-306, Операция и обслуживание

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5–5 T-354
5.8 PRE-TRIP DIAGNOSIS
CAUTION
!
Pre-trip inspection should not be per formed with critical temperature cargoes in the container.
CAUTION
!
When Pre-Trip key is pressed, dehumidification and bulb mode will be deactivated. At the com-
pletion of Pre-Trip activity, dehumidification and bulb mode must be reactivated.
Pre-Trip diagnosis provides automatic testing of the unit components using internal measurements and compari-
son 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 (depending on software revision installed).
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. The contents of the menus are as follows:
A detailed description of the pre-trip test codes is listed in Table 4–7 . If no selection is made, the pre-trip menu
selection process will terminate automatically. However, dehumidification and bulb mode must be reactivated man-
ually 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 pow-
ered up, “----” will be displayed.
To start a pre-trip test, do the following:
1. Prior to starting tests, verify that unit voltage (Function Code Cd 07) is within tolerance and unit amperage
draw (Function Codes 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 diagnosis may also be initiated via communications. The operation is the same as for the key pad
initiation described below except that should a test fail, the pre-trip mode will automatically terminate. When
initiated via communications, a test may not be interrupted with an arrow key, but the pre-trip mode can be
terminated with the PRE-TRIP key.
a. Press the PRE-TRIP key. This accesses a 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.
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.
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 countdown 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 opera-
tor intervention.
PRE-TRIP SELECTION MENU
Auto or Auto 1 Auto 2 Auto 3
P1, P2, P3, P4, P5, P6, rSLts P, P1, P2, P3, P4, P5, P6, P7, P8,
P9, P10, rSLts
P, P1, P2, P3, P4, P5, P6, P7, P8,
rSLts