T-365 5–8
The testing begins with access to a Pre−trip selection menu. The user may have the option of selecting one of two
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 4–4. 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 a Pre−trip test, verify that unit voltage (Cd07) is within tolerance and unit amper-
age draw (Cd04, Cd05, Cd06) are 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 termi-
nate. 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.
1. Press the PRE−TRIP key to accesses the Pre−trip test selection menu.
2. TO RUN AN AUTOMATIC TEST: Scroll through the selections by pressing the UP ARROW or DOWN
ARROW keys to display AUTO, AUTO 1, AUTO 2 or AUTO 3 as desired, then press ENTER.
a. 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.
b. While tests are running, “P#−#” will appear on the left display; 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.
When a failure occurs during automatic testing, the unit will suspend operation awaiting oper-
ator 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 or until the user manually enters a command.
When Pre−trip test Auto2 runs to completion 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 1 Pre−trip test runs to completion without a failure, the unit will exit Pre−trip mode and return to nor-
mal control operation. However, dehumidification and bulb mode must be reactivated manually if required.
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