62-11640 3–8
3.6 PRETRIP
Pretrip is a set of tests run by the control system to
check unit operation. It is recommended that a Pretrip
is run prior to loading the refrigerated compartment. It
will indicate a failure if one is detected.
TIP
A Pretrip can be started at any box tempera-
ture. If Pretrip is started while the unit is in a
Start-Stop off cycle the unit will start during
the course of the test. If the unit is running
when Pretrip is started, it will shutdown for
the first three tests.
TIP
If “CAN NOT START PRETRIP” is displayed
in the MessageCenter, check to see if the
unit is in PC Mode (Refer to Section 5.3.2)
or Defrost mode, or check the alarm list
(Section 3.15) for active shutdown alarms.
NOTE
Pretrip will run until completed, unless an
alarm occurs that causes Pretrip to be
aborted. Only alarms that will result in other
erroneous alarms or will affect future Pretrip
tests will abort Pretrip.
Once Pretrip is started: If the unit is running, the control
system will shut the unit down for the initial tests, then
start it again as it proceeds through the tests.
NOTE
Before completing Pretrip, the control sys-
tem looks at the status of alarms and if cer-
tain alarms are active (for example: Low
Fuel Warning, Check Engine Oil Level,
Check Coolant Temperature), Pretrip will
display “FAILED”, indicating that the unit is
not ready to be sent out for a load, but that
the alarm list should be checked and all
present alarm situations corrected.
1. With the system powered up (START/RUN-OFF switch in the START/RUN position), press the MENU key
until PRETRIP is displayed.
2. Press the PRETRIP soft key to display the Pretrip Menu screen. The Pretrip Menu screen will display with a
15 second timeout.
3. Use the ▲ or ▼ key to select “Start Pretrip” then press the “=” Key.
4. If “Start Pretrip” is selected, Pretrip will begin and the Pretrip Status screen will be displayed.
At any time during Pretrip, the UNIT DATA soft key may be pressed to allow the user to view the unit data
screen (refer to Section 3.14). To return to Pretrip from the unit data screen, press the BACK soft key.
NOTE
During Pretrip the ALARM light will illuminate to indicate there is no temperature control. Immediately
following Pretrip OR if “View Results of Last Pretrip” is selected the Pretrip Summary Screen will be
displayed.
CONTINUOUS
START/STOP
MENU
ALARM
COOLDIESELSTART/STOP
INTELLISET
Viewing Menu Soft Key
Selections
Press Menu Key to Scroll
PRETRIP HOUR
METERS
UNIT
DATA
DEFROST
1
2
PRETRIP MENU
BACK EXIT
Start Pretrip
View Results of Last Pretrip
3
PRETRIP STATUS
Pretrip Type: Cool - Ambient 75 F
Test 2 of 10 - Current Test
LIV
Current Draw - 2 Amps
23%
UNIT
DATA
TEST
RESULTS
STOP
PRETRIP
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