Operating Instructions
78
Pretrip Test Considerations
When performing a Pretrip Test, the following issues should be
considered.
•
If running a Pretrip Test on a trailer loaded with dry cargo,
insure that proper airflow can occur around the load. If the
load restricts airflow, false test results may occur. Also,
Precedent units have high refrigeration capacity which
results in rapid temperature changes. Sensitive dry cargo
may be damaged as a result.
•
If running a Pretrip Test on a trailer that has just been
washed down, the extremely high humidity inside the
trailer may result in false test results.
•
If running a Pretrip Test on a trailer 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 trailer cargo doors
closed to prevent false test failures.
Performing a Pretrip Test
If a Pretrip Test is initiated with the engine shut down a Full
Pretrip Test will be performed. If a Pretrip Test is initiated with
the engine or motor running a Running Pretrip Test is
performed.
•
Before initiating a Pretrip Test, clear all alarm codes.
•
To stop a Pretrip Test at any time turn the unit off.
Pretrip Tests are initiated using the Pretrip Menu. From the
Standard Display, press the MENU Key (Figure 80).
Figure 80: Menu Key
MENU
35
°F
35
SET
SENSORS
GAUGES
POINT
.8
ON
OFF
