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4.2.2 A restart will be initiated when one of the
following conditions occurs:
1) Engine coolant temperature drops below
34_F(1_C). However, if the coolant sensor alarm is
active, the unit will restart if the ambient air
temperature drops to 32°F(0°C) after the unit has been
in the OFF cycle for
60 minutes.
2) Battery voltage falls below voltage selected
in the configuration list. (See Section 5.2.1)
3) Box Temperature has exceeded Off Time
Override T emperature
During the Minimum Off Time, the microprocessor
continually monitors the Box Temperature. If the
temperature should go beyond the Off Time Override
Temperature (above or below setpoint in the perishable
range or above setpoint in the frozen range), the unit
will restart, regardless of how much Off Time remains.
The Off Time Override Temperature is selected in the
microprocessor Functional Parameter List. (Refer to
Section3.16) Thiscanbesetfor3.6_ Fto18_F(2_Cto
10_C) in 0.5° increments.
After the Minimum Off Time (if the unit is still in the off
cycle), the unit will restart when the box temperature goes
beyond ±3.6_F(±2.0_C) of setpoint for the Perishable
range or above +3.6_F(+2.0_C) of setpoint for the Frozen
range.
4) The Minimum Off Time Has Expired
The Minimum Off Time allows the unit to remain off
for extended periods of time, maximizing fuel economy.
The Minimum Off Time is selected in the
microprocessor Functional Parameter List. (Refer to
Section 3.16). Settings may be for 10 minutes to 90
minutes in 1 minute intervals. The factory setting is 20
minutes.
After the Minimum Off Time (if the unit is still in the off
cycle), the unit will restart when the box temperature goes
beyond ±3.6_F(±2.0_C) of setpoint for the Perishable
range or above +3.6_F(+2.0_C) of setpoint for the Frozen
range.
5) The Maximum Off Time has expired.
In some ambient conditions, there are times when
the unit may be off for very long periods of time. To
ensure that the entire load stays within safe temperature
ranges, the Maximum Off Time may be used to force the
unit to restart. Maximum Off Time is selected in the
microprocessor Functional Parameter List. This may
be set for OFF, or 10 minutes to 255 minutes in 1 minute
intervals. When the Maximum Off Time expires, the unit
will restart, regardless of any change in box
temperature.
NOTE
The unit may remain in low speed for 10 min-
utes (Factory Setting) after engine start-up
when in Start--Stop Mode. High speed delay
can be set from Off to 255 minutes in 1 minute
increments. (Refer to Functional Parameters,
Section 3.16).
TIP
While the unit is running, the status of the unit
battery and engine coolant temperature can be
readily checked by reading the Battery Voltage
in the Data List. If “O.K.” appears after the volt-
age reading, both battery volts and engine cool-
ant temperature are sufficient to allow the unit to
cycle off. If “O.K.” does not appear, then one or
both of these conditions have not been met, and
the unit is not ready to cycle off.
4.2.3 Start--Stop Indicator
To indicate that the unit is in the “Start--Stop” mode, the
Start--Stop LED indicator and Engine Auto Start lights
on the light bar will be illuminated.
4.2.4 Failed To Start -- Auto Mode
If the unit fails to start after three start attempts, the
Alarm A31 --FAILED TO START--AUTO MODE will
appear in the MessageCenter, and the Alarm LED on
the Keypad and the Fault light on the light bar will flash
on and off once a second.
4.2.5 Start--Stop Parameters
The selectable Start--Stop parameters in the Functional
Parameter list can be applied to Start--Stop operation so
that:
• The same settings apply to any setpoint, or
• The settings can be specified to be different, depend-
ing on whether the setpoint is above +10.4°F
(--12°C) (in the perishable range), or +10.4°F
(--12°C) or below (in the frozen range.)
The decision as to whether the same settings will be used
together for all setpoints or if they will be separated
between Perishable and Frozen is made in the
Configuration List. (Refer to Section 5.2.)
If TOGETH E R is selected in the Configuration List, then
the following Functional Parameter values will be available
for use:
• MINIMUM RUN TIME
• MINIMUM OFF TIME
• OVERRIDE TEMP
• MAXIMUM OFF TIME
• FROZEN SHUTDOWN OFFSET
If SEPARATE is selected in the Configuration List, then
the following Functional Parameter values will be available
for use:
• PERISHABLE MINIMUM RUN TIME
• PERISHABLE MINIMUM OFF TIME
• PERISHABLE OVERRIDE TEMP
• PERISHABLE MAXIMUM OFF TIME
• FROZEN MINIMUM RUN TIME
• FROZEN MINIMUM OFF TIME
• FROZEN OVERRIDE TEMP
• FROZEN MAXIMUM OFF TIME
• FROZEN SHUTDOWN OFFSET
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