Thermo King UT-1280, Руководство оператора

Страница: 55 / 83

Unit Operation
53
Pretrip Test Considerations
When performing a Pretrip Test, the following issues should be
considered.
• Whenever possible, run the Pretrip Test with an empty
truck box.
• If running a Pretrip Test on a truck loaded with dry cargo,
insure that proper airflow can occur around the load. If the
load restricts airflow, false test results may occur. Also,
units have high refrigeration capacity which results in
rapid temperature change. Sensitive dry cargo may be
damaged as a result.
• If running a Pretrip Test on a truck that has just been
washed down, the extremely high humidity inside the
truck box may result in false test results.
• If running a Pretrip Test on a truck loaded with sensitive
cargo, monitor the load temperature during the test as
normal temperature control is suspended during pre-trip
operation.
• Always perform Pretrip Tests with the cargo doors closed
to prevent false test results.
Performing a Pretrip Test
Starting a 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 on the display, press and hold the
PRETRIP Key for 5 seconds.
Figure 41: Pretrip Test
• 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.