Thermo King UT-1200, Manual

Page: 42 / 169

Operating Instructions for Standard HMI Control Panel
42
Changing the Setpoint
From the Standard Display, press the UP ARROW
Key and/or DOWN ARROW Key until the
desired setpoint is shown. In Figure 18 the
setpoint has been increased to 40 F (4.4 C) using
the UP ARROW Key.
Figure 18: UP ARROW Key
When the desired setpoint has been selected using
the UP ARROW Key or DOWN ARROW Key,
the ENTER Key must be pressed to confirm and
load the new setpoint.
• If the setpoint is changed using the UP
ARROW Key and DOWN ARROW Key, the
setpoint display will begin to flash 10 seconds
after the last press of the UP ARROW or
DOWN ARROW key as a reminder to press
the ENTER Key.
• The setpoint display will flash for 10
additional seconds. If at the end of this time
the ENTER Key still has not been pressed to
complete the setpoint change, the setpoint will
return to the old setpoint and Alarm Code 127
Setpoint Not Entered will be set. The Alarm
Icon will appear in the display.
Figure 19: ENTER Key
The new setpoint of 40 F (4.4 C) will remain on
the display after the ENTER Key has been
pressed.
Failure to confirm the new setpoint by pressing
the ENTER Key within 20 seconds of changing
the setpoint will result in no setpoint change. In
addition, Alarm Code 127 Setpoint Not Entered is
set, to indicate that the setpoint change was started
but was not completed.
Figure 20: Alarm Icon and Setpoint
Notice that the setpoint has returned to the old
setpoint of 35 F (1.6 C) and the Alarm Icon has
lighted indicating that Alarm Code 127 Setpoint
Not Entered is set.
IMPORTANT: If the setpoint is changed using
the UP ARROW Key or DOWN ARROW Key,
the change must be confirmed by pressing the
ENTER Key within 20 seconds of changing the
setpoint.
• If the ENTER Key is pressed, the setpoint
change made with the UP ARROW Key
and/or DOWN ARROW Key is accepted, the
setpoint is changed, and the display returns to
the Standard Display showing the new
setpoint.
• If the ENTER Key is not pressed within
20seconds of making a change with the UP
ARROW Key and/or DOWN ARROW Key,
the setpoint is not changed and the display
returns to the Setpoint Display showing the
old setpoint. Alarm Code 127 Setpoint Not
Entered is set and the Alarm Icon will appear
on the display, to indicate that the setpoint
change was started but not completed.
Starting the Diesel Engine
Diesel engine preheats and starts are automatic in
both Continuous Mode and CYCLE-SENTRY
Mode. The engine will preheat and start as
required when the unit is turned on. The engine
pre-heat and start sequence will be delayed in
Cycle Sentry mode if there is no current need for
the engine to run.
NOTE: If the unit is equipped with optional
Electric Standby there may be some additional
prompts before the engine will start. See
STARTING THE ELECTRIC MOTOR on the
following pages for details.
CAUTION: The engine may start automatically
any time the unit is turned on.