62-11863 3-6
Once the unit starts in Auto Start/Stop, it will run until:
• It runs for the predetermined minimum run time
• Engine coolant temperature is above 122°F (50°C)
• Box temperature is at set point
The microprocessor will not shut off the engine if the battery voltage is not sufficient to restart it. Battery voltage
above approximately 13.4 volts is required for shutdown. This varies depending on ambient. Look at battery volt-
age in data list (refer Section 3.15.3, Table 3–9) to find out whether shutdown voltage has been reached. If there is
a + in front of the number, the voltage is enough to shutdown and restart. If only the number appears, the voltage is
still too low for shutdown.
The microprocessor will restart the engine if any of the following criteria have been met:
• Refrigerated compartment temperature has changed by ±11°F (±6.1°C) or set points in the perishable range
and +11°F (+6.1°C) for set points in the frozen range DURING Minimum Off Time.
• Refrigerated compartment temperature has moved away from set point by ±3.6°F (2.0°C) AFTER Minimum
Off Time for set points in the perishable range or +0.5°F (0.3°C) for set points in the frozen range.
• The battery voltage drops below 12.2 VDC. (See Section 3.11 for Unit Data).
• The engine coolant temperature drops below 34°F (1°C).
Auto Start/Stop operation may be tied to the set point ranges for frozen and perishable loads and the
AUTO START/STOP key may be locked out.
3.7 CONTINUOUS RUN OPERATION
1. If the AUTO START/STOP indicator is illuminated, press the AUTO START/ STOP toggle key to place the
unit in Continuous Run operation. The indicator will not be illuminated.
In the Continuous Run mode, the diesel engine (and the electric motor in Standby operation) will run continuously
providing constant air flow and temperature control to the product. Continuous operation may be tied to the setpoint
ranges for frozen and perishable loads and the AUTO START/STOP key may be locked out.
Continuous Run mode is adequate when load type requires constant airflow for better product protection. Control
of temperature is accomplished by alternating cooling or heating to maintain set point. In the Continuous Run
mode, the diesel engine will not shut down except for safety or if the engine stalls. This function also applies to the
operation of the electric motor.
AUTO START/STOP indicator
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