Operating Instructions
51
•
If the unit is in Sleep Mode.
•
If the unit is in Service Test Mode, Output
Test Mode or Evacuation Mode.
Pretrip Test Sequence
Pretrip tests proceed in the order shown below. A
Full Pretrip Test includes all tests. A Running
Pretrip Test is started with the engine or motor
running and does not include the Amp Checks or
Engine Start Check.
Amp Checks
- Each electrical control component
is energized and the current drawn is confirmed as
within specification.
Engine Start
- The Engine will start
automatically.
Defrost
- If the coil temperature is below 45 F
(7 C), a defrost cycle is initiated.
RPM Check
- The engine RPM in high and low
speed is checked during the Cool Check.
Cool Check
- The ability of the unit to cool in low
speed is checked.
Heat Check
- The ability of the unit to heat in low
speed is checked.
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.
•
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,
these 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 76).
Figure 76: Menu Key
The Main Menu will appear. Press the UP or
DOWN Key as required to choose the Pretrip
Menu. When the Pretrip Menu is shown press the
SELECT Key to start a Pretrip Test (Figure 77).
Figure 77: Select Key
The display will briefly show PROGRAMMING
PRETRIP MODE (Figure 78). If the unit is not
running a Full Pretrip Test will be initiated. If the
unit is running in either diesel or electric mode a
Running Pretrip Test will be performed.
MENU
35
°F
35
SET
SENSORS
GAUGES
POINT
.8
ON
OFF
ON
OFF
MAIN MENU
DOWN
EXIT
SELECT
UP
PRETRIP
LANGUAGE
ALARMS
GAUGES
