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If the temperature requirement has been satisfied while one of the other shutdown requirements has not been met,
the unit will operate with the compressor and heaters off and the evaporator fan running until this parameter has
also been met.
4.5.3 Re-Start Parameters
While the unit is in a Start-Stop OFF Cycle, restart will be initiated when one of the following conditions occurs:
NOTE
In Start-Stop Operation, when the setpoint is in the frozen range (refer to Section 4.6.1), the unit will
not restart when temperature is below setpoint except as indicated in the following.
4.5.3.1 Engine coolant temperature drops below selected Configuration value
If in Engine Operation, the control system will monitor coolant temperature. If coolant temperature drops
below the ENGINE TEMPERATURE for RESTART Configuration value the engine will be started. The
Configuration value may be set from 10 to 32°F (-12.2 to 0°C). The factory default setting is 10°F (-
12.2°C). If this is the only reason operation is required, the unit will operate as if it is in Continuous Opera-
tion until the requirement has been met.
4.5.3.2 Battery voltage falls below selected Configuration value
The control system will monitor battery voltage. If battery voltage is at or below the VOLTAGE for START-
STOP RESTART Configuration value the engine will be started. The value may be set from 12.0 to 12.8
volts. The factory default setting is 12.2 volts.
TIP
The status of the unit battery can be checked by reading the Battery Voltage in the Data List. If “OK.”
appears after the voltage reading, battery voltage is sufficient to allow the unit to cycle off.
If this is the only reason operation is required, the unit will operate as if it is in Continuous Operation until
the requirement has been met.
4.5.3.3 Maximum Off Time has expired
In some ambient conditions there are times when the unit may remain in a Start-Stop Off cycle for
extended periods of time. To ensure that the entire load stays within the normal restart temperature range,
the MAXIMUM OFF TIME Functional Parameter may be used to force the unit to restart (if in Engine Oper-
ation, in low speed) with the evaporator fans running to circulate air in the compartment. This will ensure
there are no hot spots and the temperature sensor reading accurately reflects product temperature. The
parameter value may be set to 0 minutes or from 10 to 225 minutes in 1 minute intervals.
If the MAXIMUM OFF TIME is “OFF“, there is no maximum off time for Start-Stop and the unit will remain
off. The factory default setting is OFF.
If this is the only reason operation is required, the unit will operate as if it is in Continuous Operation until
the requirement has been met.
4.5.3.4 Minimum Off Time has expired
The MINIMUM OFF TIME Functional Parameter setting allows the unit to remain off for extended periods
of time, maximizing fuel/power economy. The unit may not be restarted until the MINIMUM OFF TIME has
expired and the compartment temperature is greater than the PERISHABLE RESTART TEMPERATURE
value selected in the Functional Parameters away from setpoint. In the Frozen Range, restart is allowed
when the compartment temperature is calculated to be greater than 0.5°F above setpoint. The MINIMUM
OFF TIME parameter value may be set from 10 to 90 minutes in one minute intervals. The factory default
setting is 30 minutes. The RESTART TEMPERATURE value may be set from 0.5 to 18°F (0.28 to 10°C) in
0.5 (F or C) increments. The factory default is 5.4°F (-14.7°C).
If this is the only reason operation is required, the unit will operate as if it is in Continuous Operation until
the requirement has been met.
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