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TK 56702-1-OP-EN
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Engine Start - The engine will start automatically.
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Defrost - If the coil temperature is below 45°F (7°C), a defrost cycle is
initiated.
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RPM Check - The engine RPM in high and low speed is checked during
the Cool Check.
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Cool Check - The ability of the unit to cool in low speed is checked.
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Heat Check - The ability of the unit to heat in low speed is checked.
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Report Test Results - The test results are reported as PASS, CHECK, or
FAIL when the Pretrip Test is completed. If test results are CHECK or FAIL,
alarm codes will exist to direct the technician to the source of the
problem.
Pretrip Test Considerations
When performing a Pretrip Test, the following issues should be considered:
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If running a Pretrip Test on a truck loaded with dry cargo, verify proper
airflow can occur around the load. If the load restricts airflow, false test
results may occur. Also, SR-3 units have high refrigeration capacity
which results in rapid temperature changes. Sensitive dry cargo may be
damaged as a result.
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If running a Pretrip Test on a truck that has just been washed down, the
extremely high humidity inside the truck may result in false test results.
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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 a Pretrip Test.
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Always perform Pretrip Tests with the truck 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 electric motor
running, a Running Pretrip Test is performed.
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Before initiating a Pretrip Test, clear all alarm codes.
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To stop a Pretrip Test at any time, turn the unit off. Alarm Code 28 Pretrip
Abort will be set. Other alarms may also be set depending upon test in
progress when the test was terminated.
Pretrip Tests are initiated using the Pretrip Menu. From the Standard
Display, press the MENU key.
