Performing a Pretrip Test

Parent topic: Truck Standard Display HMI Control Panel

Starting a Full Pretrip Test

The Full Pretrip Test must be started with the unit not running. Turn the unit on and clear all alarm codes. Turn the unit off.

Turn the unit on and wait for the unit running time hourmeters to be shown on the display. When the unit running time hourmeters are shown, press and hold the PRETRIP Key for five seconds ( PRETRIP Key).

  • A flashing Pretrip LED indicates that the Pretrip Test is being initialized. When the Pretrip Test starts, the Pretrip LED will glow steady amber. The display will show the Standard Display.

  • The Amps Check Test will be performed and then the unit will start automatically. The balance of the tests will be completed.

  • The Pretrip Test will take about 20 - 30 minutes, depending on conditions.

    Important The box temperature will vary during the Pretrip Test. This is normal operation.

  • When the Pretrip Test is complete or if a Shutdown Alarm occurs, the amber Pretrip LED will turn off.

To stop a Pretrip Test at any time, press the POWER OFF Key to turn the unit off. This will generate Alarm Code 28 Pretrip Abort. Other alarm codes may also be generated. This is normal when the Pretrip Test is halted before completion.

PRETRIP Key

Starting an Engine Running Pretrip Test

The Engine Running Pretrip Test must be started with the unit running. Turn the unit on and clear all alarm codes. Allow the unit to start.

With the unit running, press and hold the PRETRIP Key for five seconds ( PRETRIP Key).

  • A flashing Pretrip LED indicates that the Pretrip Test is being initialized. When the Pretrip Test starts, the Pretrip LED will glow steady amber to indicate the test is in progress. The display will show the Standard Display.

  • The Pretrip Test will take about 20 - 25 minutes, depending on conditions.

    Important The box temperature will vary during the Pretrip Test. This is normal operation.

  • When the Pretrip Test is complete or if a Shutdown Alarm occurs, the amber Pretrip LED will turn off.

To stop a Pretrip Test at any time, press the POWER OFF Key to turn the unit off. This will generate Alarm Code 28 Pretrip Abort. Other alarm codes may also be generated. This is normal when the Pretrip Test is halted before completion.

PRETRIP Key

Pretrip Test Results

Pass Pretrip Test

  • If the unit passes the Pretrip Test, the amber Pretrip Test LED will turn off at the completion of the test and the unit will continue to run as required. This signifies that the unit passed the Pretrip Test.

Fail Pretrip Test with Check Alarms

  • If the unit fails the Pretrip Test with Check alarms, the Alarm Icon will appear when the alarm condition occurs. The Pretrip Test will continue to run unless a Shutdown Alarm occurs.

  • The amber Pretrip Test LED will turn off at the completion of the test, but the Alarm Icon will remain lit. This indicates that one or more Check Alarm conditions occurred during the Pretrip Test. More than one alarm may be present.

  • View and record the alarm(s), correct as necessary, clear the alarm(s) and repeat the Pretrip Test.

Fail Pretrip Test with Shutdown Alarms

  • If the unit fails the Pretrip Test with a Shutdown alarm, the Alarm Icon will appear when the alarm condition occurs, the unit will immediately shut down and the amber Pretrip Test LED will turn off.

  • The Pretrip Test will be aborted.

  • Alarm Code 28 Pretrip Abort will be set along with the Shutdown Alarm that was detected. This signifies that a Shutdown Alarm occurred during the Pretrip Test and that the test was aborted. Other alarms may also be present.

  • View and record the alarm(s), correct as necessary, clear the alarm(s) and repeat the Pretrip Test.