Section 3 – SR-2 Software Description
Continuous Low Speed Switch Point
Micro Rev
All
HMI Rev
All
Choices
3.5°F (1.9°C) to 10.0°F (5.5°C)
Factory Set
3.5°F (1.9°C)
Exceptions Not active if modulation is enabled.
Only appears if High Speed Pulldown = Off.
Description Low Speed Switch Point is the point
at which the unit will switch from high speed
operation to low speed operation on temperature
pull down. This is true on initial startup as well as a
startup from Cycle Sentry Null. This feature is not
available if High Speed Pull Down = On.
If High Speed Cool to Low Speed Cool Switch Point
is set above 3.5°F (1.9°C), the Null Restart Above
Setpoint feature will be changed automatically. It
must be at least 1.5°F (0.8°C) above the setting of
High Speed Cool to Low Speed Cool Switch Point.
This feature is not used during modulation operation.
Continuous Fuel Saver II Switch Point
Micro Rev
All
HMI Rev
All
Choices
5.0°F (2.7°C) to 10.0°F (5.5°C)
Factory Set
5.0°F (2.8°C)
Exceptions Not active if modulation is enabled.
Only appears if Fuel Saver II = On.
Description This switch point determines the
number of degrees above setpoint the temperature
must rise before high speed operation is allowed
when Fuel Saver II is active.
Continuous Heat/Cool Switch Point
Micro Rev
All
HMI Rev
All
Choices
0.5°F (0.2°C) to 2.5°F (1.5°C)
Factory Set
1.7°F (0.9°C)
Exceptions Not active if modulation is enabled.
Description On units without a modulation valve
the unit will cycle between heat and cool after
setpoint is reached. The unit will switch from cool to
heat when setpoint is reached.
Heat/Cool Switch Point is the point at which the unit
will switch from heat back to cool. Reducing this
value results in tighter temperature control when
conditions warrant.
Continuous Door Open Forces
Micro Rev
All
HMI Rev
All
Choices
Off or Log Only
Factory Set
Log Only
Exceptions
Description If the optional door switch is
installed this feature allows the Door Open action for
the selected range to be set. If this feature is set
OFF the unit will shut the unit down and log the door
opening 4 seconds after the door is opened. If the
unit is in defrost when the door is opened the defrost
cycle will be completed before the unit shuts down.
If this feature is set LOG ONLY the door opening will
be logged after 4 seconds but the unit will continue
to run.
Door openings are logged in both the CargoWatch
and ServiceWatch data loggers. The door switch
must be open or closed for 4 seconds before the
event is logged to prevent false readings.
3-34
31 January 2005
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