62-12259 4–6
4.5.2 Stop Parameters
Whenever the unit starts in Start-Stop Operation, it will remain in the Start-Stop ON cycle until all five of the follow-
ing criteria have been satisfied:
4.5.2.1 Unit has run for the selected Minimum Run Time
The MINIMUM RUN TIME is selected in the control system Functional Parameters. The purpose of this is
to force the unit to run long enough to completely circulate the air inside the compartment, and to ensure
that the product temperature is at setpoint. This value may be set from 4 to 60 minutes in 1 minute inter-
vals. The factory default setting is 4 minutes.
If all Start-Stop parameters required to enter a Start-Stop Off cycle have been met except this parameter,
the unit will operate with the compressor and heaters off and the evaporator fan running until this parame-
ter has been met.
4.5.2.2 Engine coolant temperature has warmed
Each time the unit is started in Engine Operation it must continue to run until the coolant temperature rises
to 95°F (35°C) to ensure it has fully warmed up before shutdown is allowed.
If all Start-Stop parameters required to enter a Start-Stop Off cycle have been met except this parameter,
the unit will operate with the compressor and heaters off and the evaporator fan running until this parame-
ter has been met.
4.5.2.3 Battery is fully charged - Voltage
A good battery is defined as having 13.1 VDC at 77°F (25°C). The control system will calculate the equiva-
lent voltage based on the ambient temperature and shutdown will be allowed when battery voltage is at or
above the calculated value.
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 in Engine Operation and all Start-Stop parameters required to enter a Start-Stop Off cycle have been met
except this parameter, the unit will operate with the compressor and heaters off and the evaporator fan run-
ning until voltage is greater than 13.1 VDC or the greater of the applicable MINIMUM RUN TIME functional
parameter setting, or 20 minutes has elapsed (this applies to restart based on battery voltage only).
If in Electric Operation and compressor has cycled off, PSCON will remain energized (to supply power to
the battery charger) until the stop parameter has been met or the greater of the applicable MINIMUM RUN
TIME functional parameter setting has elapsed.
4.5.2.4 Battery is fully charged - Amperage
The control system will calculate the average current draw over a 20-second period. Once this average
drops below the selected value, shutdown will be allowed. The CURRENT for START-STOP SHUTOFF is
selected in the control system Configurations. The value may be set from 1 to 10 amps in 0.5 amp inter-
vals. The factory default setting is 7 amps.
If in Engine Operation and all Start-Stop parameters required to enter a Start-Stop Off cycle have been met
except this parameter, the unit will operate with compressor and heaters off and evaporator fan running
until battery amperage draw is less than 7.0 amps.
If in Electric Operation and the compressor has cycled off, PSCON will remain energized (to supply power
to the battery charger) until battery amperage draw is less than 7.0 amps.
4.5.2.5 Compartment temperature requirement is satisfied
In Start-Stop Operation the refrigeration system will operate in Pulldown or Pull-Up mode in order to reach
the shutdown condition as quickly as possible.
Shutdown will be allowed when the compartment temperature is within 0.5°F (0.3°C) of setpoint, for opera-
tion in Perishable Range. In Frozen Range, shutdown will be allowed when the compartment temperature
is calculated to be within 0.5°F (0.3°C) minus the FROZEN SHUTDOWN OFFSET of setpoint.
The FROZEN SHUTDOWN OFFSET Functional Parameter may be set from 0 to 1.1°F (0 to 0.6°C). The
factory default setting is 0°F (0°C).
To Next Page
Loading...
