Thermo King Precedent C-600M, Operator'S Manual

Page: 46 / 166

Operating Instructions
44
the Cycle Sentry Icon at the top of the display shows that the
unit is operating in Continuous mode. The box temperature for
all zones is 35.8°F and all zones are controlling to a 35°F
setpoint. The down-pointing arrow indicates that all zones are
cooling. The soft key labeled Setpoint allows the setpoint for
all zones to be changed. The soft key labeled Menu allows the
Main Menu to be selected.
Operating the Unit in Single Zone
Mode
The following differences exist when operating the unit in
Single Zone Control Mode.
•
Single Zone Control Mode will appear in the Mode Menu
only if the Single Zone Control feature has been enabled
in the Guarded Access/Main Menu Configuration menu. If
the feature is enabled then Single Zone Control will appear
in the Main Menu/Mode Menu.
• If Single Zone Control operation is selected then all zones
will be forced on and will control to the same setpoint. The
Zone 1 sensors are used to determine box temperature. All
bulkheads should be taken down to create one large
compartment. With the exception of defrost the operating
mode of each zone evaporator(s) will be same when in this
mode. Unit control is based on the temperature sensors of
one zone (usually Zone 1).
• If Single Zone Control operation is selected the Single
Zone Standard Display provides only one soft key labeled
Set Point. This allows the setpoint for all zones to be
changed simultaneously.
• If Single Zone Control operation is selected the individual
zones cannot be turned off. The unit and all zones are
turned On and Off simultaneously using the On and Off
hard keys at the left side of the display.
TemperatureWatch Display
If there is no key activity and no check, prevent, or Shutdown
Alarms are present the TemperatureWatch Display appears 2½
minutes after the last key entry from the Standard Display. The
TemperatureWatch screen (Figure 20) will remain on until any
key is pressed or a check, prevent, or Shutdown Alarm occurs.
The TemperatureWatch Display shows the return air
temperature and setpoint for each zone. Tenths of a degree are
not shown by the TemperatureWatch display. The large