Unit Description (Rev. 04/03)
9
5. BELTS. The belts must be in good condition and
adjusted to the proper tensions.
6. ELECTRICAL. The electrical connections should be
securely fastened. The wires and terminals should be
free of corrosion, cracks or moisture.
7. STRUCTURAL. Visually inspect the unit for leaks,
loose or broken parts and other damage. The condenser
and evaporator coils should be clean and free of debris.
Check the defrost drain hoses and fittings to be sure
they are open. The damper in the evaporator outlet
must move freely with no sticking or binding. Make
sure all the doors are latched securely.
Starting Unit (Full Unit Self Check)
The procedure is used for a complete checkout of the unit,
and unit control circuits. It should be used when first start-
ing the unit for a trip before the cargo is loaded. A full Unit
Self Check procedure may take up to 30 minutes and the
unit will run unattended.
1. Perform a Pre-trip Inspection.
2. Adjust the setpoint to the desired load temperature
(refer to the Operation Manual (TK) for detailed infor-
mation about adjusting the setpoint).
a. Change the setpoint display with the arrow keys.
b. Enter the new setpoint by pressing the ENTER key
within 5 seconds.
3. Initiate a Unit Self Check (refer to the Operation Man-
ual for detailed information about the Unit Self Check).
This procedure is automatic and can be performed on
the way to the loading area or while waiting to load.
a. Press the On button.
b. Clear any alarms.
c. Press and hold the T/K key for at least 3 seconds
until the Unit Self Check [USC] prompt screen
appears.
d. Press the ENTER key. The display will briefly
show Lod (load) and the unit will then start the
Unit Self Check.
4. When the PRE TRIP test is complete, PASS, CHECK,
or FAIL will appear on the display until any key on the
controller is pressed. Continue as follows:
PASS (Unit running, no alarms)
• Unit has passed the PRE TRIP, go to step 5.
CHECK (Unit running but Check Alarms have
been recorded)
or
FAIL (Unit has shut down and recorded Shut-
down Alarms)
a. View the Alarms with the SELECT key (refer to
the appropriate Operation and Diagnosis Manual
for detailed information about alarms).
b. Correct the alarm conditions.
c. Clear the alarms with the CLEAR key (refer to the
appropriate Operation and Diagnosis Manual for
detailed information about alarms).
d. Repeat the test until PASS appears (the unit passes
the unit self check).
5. Recheck the setpoint.
6. Complete the After Start Inspection.
Selection of Operating Modes on
CYCLE-SENTRY Equipped Units
The Thermo King CYCLE-SENTRY system is designed to
save refrigeration fuel costs. The savings vary with the com-
modity, ambient temperatures and trailer insulation. How-
ever, not all temperature controlled products can be properly
transported using CYCLE-SENTRY operation. Certain
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