Carrier PrimeLINE 69NT40-561-200, Operation And Service Manual

Page: 54 / 198

T-362 4–14
Cd51 Automatic Cold Treatment (ACT) Mode Parameter Selection
Cd51 controls the Automated Cold Treatment (ACT) Mode option, which is a method to simplify the task
of completing cold treatment by automating the process of changing the setpoints. Cold treatment is an
effective post-harvest method to control Mediterranean and certain other tropical fruit flies.
If the unit is not configured for ACT or a valid probe setup is not detected (minimum of 3 USDA probes
configured and detected), ACT can not be enabled. Cd51 will display dashes “-----”.
Cd51 initially displays the countdown timer in days and hours remaining, regardless of whether it is
enabled. In the Cd51 menu, pressing the ENTER key will take the interface down into a hierarchy of
parameter selections. After the last parameter selection, pressing ENTER will return to “Cd 51”.
Cd51 Parameter Selections:
“Cd 51” | “X- X” (default “0-0”) || Countdown timer in days, hours
“ACt” | “On” “OFF” or “----” (default “OFF“) || Enabled or disabled status
“trEAt” | “X.X°C” (default “0.0°C“) || Cold treatment setpoint edited in increments of 0.1 degrees
“DAyS” | “X” (default “0”) || 0 to 99 in increments of 1
“ProbE” | “XXXX” (default “----“) || Probe positions, ex: “1234”
“SPnEW” | “X.X°C” (default “10.0°C“) || Setpoint after ACT, edited in increments of 0.1 degrees
Turn On ACT:
With “ACt” displayed, select “On” and press the ENTER key to enable ACT Mode. See
Section 5.10.4
for
detail procedure to set ACT values using Cd51.
While ACT is On:
• The left display will flash “COLd” and the right display will flash “trEAt”, and this will alternate between
the unit setpoint and control temperature at 5 second intervals. Once ACT is successful, the cargo
setpoint (SPnEW setting) will be displayed in the left display and control temperature in the right
display, alternating with "COLd" "Done". This will continue until ACT is turned off.
• ASC (Cd53) is disabled. ACT and ASC can not be enabled simultaneously.
• Setpoint change via the keypad is disabled.
• QUEST Mode is suspended but QUEST II can still operate.
ACT Complete:
When ACT has completed, including reaching the new setpoint, the 2nd selection in the Cd51 menu will
display “done” on the left display and the MONTH DAY of completion on the right display. Turning ACT off
clears this entry. This action also resets Cd51 to initial time remaining. ACT must then be turned on to
view or modify the additional parameters.
Turn Off ACT:
ACT mode is turned off automatically when any Auto Pre-Trip test or Trip Start is initiated.
With “ACt” displayed, select “OFF” and press the ENTER key to disable ACT Mode manually.
Table 4–4 Controller Function Codes
Code Description