Thermo King SB-210, Manual

Page: 60 / 159

Operating Instructions
60
Pretrip Tests
A Pretrip test verifies unit operation. The Pretrip
Menu allows the operator to select and initiate a
Pretrip Test. If the Pretrip is entered with the unit
not running a Full Pretrip with device amp checks
will be performed. If the Pretrip is entered with
the unit running in either Diesel or Electric mode
a Running Pretrip is performed. Results are
reported as “PASS”, “CHECK” or “FAILED”
when the Pretrip Test is completed.
Pretrip Test Conditions
• Pretrip Test can be run in either Diesel or
Electric mode
• The unit will autoswitch from Diesel to
Electric mode or from Electric to Diesel mode
during a Pretrip Test if these features are
enabled.
Pretrip Tests are not allowed if:
• Any alarms are present
• The unit is in Sleep mode.
Pretrip 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.
• Cool Check – The ability of the unit to cool in
low speed is checked
• RPM Check – The engine RPM in high and
low speed is checked during the Cool Check
• 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 “FAILED”
when the Pretrip is completed. If test results
are Check or Failed, alarm codes will exist to
direct the technician to the source of the
problem.
If a Pretrip is initiated with the engine not
running, a Full Pretrip will be performed. If a
Pretrip is initiated with the engine or motor
running a Running Pretrip is performed.
Before initiating a Pretrip, clear all alarm codes.
Start a Pretrip as follows:
1. Start at the Standard Display. If the
Temperature Watch Display is showing, press
the
M
ENU
soft key once to return to the
Standard Display.
2. Press the
M
ENU
soft key on the Standard
Display.
3. Press the
N
EXT
soft key until the Pretrip Screen
appears. See Figure 51.
4. Press the
S
ELECT
soft key to start a Pretrip.
5. A Full Pretrip will be initiated if the unit is not
running. If the unit is running in either Diesel
or Electric mode a Running Pretrip will be
performed.
6. The Pretrip display appears. The top line of
the display indicates the unit is performing the
non-running Pretrip. Test progress is
measured by the number of tests completed
CAUTION: Monitor the return air
temperature when performing a Pretrip
Test on a loaded trailer. The controller
may not maintain setpoint during the
Pretrip Test.
1. Menu Soft Key
Figure 50: Standard Display
1