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32
T-305
Table 6 Controller Function Codes (Sheet 2 of 4)
Cd22 Compressor Speed
The status of the compressor is displayed (high, low or off).
Cd23 Evaporator Fan
Displays the current evaporator fan state (high, low or off).
Cd24 Controlled
Atmosphere State
Not used in this application
Cd25
Compressor Run
Time Remaining Un-
til Defrost
This code displays the time remaining until the unit goes into defrost (in tenths of
an hour). This value is based on the actual accumulated compressor running
time.
Cd26 Defrost Temperature
Sensor Reading
Defrost temperature sensor reading is displayed.
Configurable Functions
NOTE
Function codes Cd27 through Cd37 are user-selectable functions. The operator can change the value of
these functions to meet the operational needs of the container.
Cd27 Defrost Interval
(Hours or Automatic)
There are two modes for defrost initiation, user--selected or automatic control.
The user--selected values are (OFF), 3, 6, 9, 12, or 24 hours with a factory de-
fault of 12 hours.
Automatic defrost starts with an initial defrost at 3 hours and then adjusts the in-
terval to the next defrost based on the accumulation of ice on the evaporator coil.
Following a start--up or after termination of a defrost, the time will not begin count-
ing down until the defrost temperature sensor (DTS) reading falls below set point.
If the reading of DTS rises above set point any time during the timer count down,
the interval is reset and the countdown begins over. If DTS fails, alarm code AL60
is activated and control switches over to the the return temperature sensor. The
controller will act in the same manner as with the DTS except the return tempera-
ture sensor reading will be used.
Defrost Interval Timer Value (Configuration variable CnF23):
If the software is
configured to “SAv” (save) for this option, then the value of the defrost interval
timer will be saved at power down and restored at power up. This option prevents
short power interruptions from resetting an almost expired defrost interval, and
possibly delaying a needed defrost cycle.
NOTE
The defrost interval timer counts only during compressor run time.
Cd28 Temperature Units
(
_
C or
_
F)
This code determines the temperature units (
_
C or
_
F) which will be used for all
temperature displays. The user selects
_
C or
_
F by selecting function code Cd28
and pushing the ENTER key. The factory default value is Celsius units.
NOTE
This function code will display “
--- --- --- --- ---“ if
Configuration Variable CnF34 is
set to
_
F.
Cd29 Failure Action
(Mode)
If all of the control sensors are out of range (alarm code AL26) or there is a probe
circuit calibration failure (alarm code AL27), the unit will enter the shutdown state
defined by this setting. The user selects one of four possible actions as follows:
A -- Full Cooling (stepper motor SMV at maximum allowed opening)
B -- Partial Cooling (stepper motor SMV 11% open)
C -- Evaporator Fan Only
D -- Full System Shutdown -- Factory Default
Cd30 In-Range Tolerance
The in-range tolerance will determine the band of temperatures around the set
point which will be designated as in-range. If the control temperature is in-range,
the in-range light will be illuminated. There are four possible values:
1 =
¦
0.5
_
C (
¦
0.9
_
F)
2 =
¦
1.0
_
C (
¦
1.8
_
F)
3 =
¦
1.5
_
C (
¦
2.7
_
F)
4 =
¦
2.0
_
C (
¦
3.6
_
F) -- Factory Default
Summary of Contents for 69NT40-489-100 Series
Page 2: ......
Page 4: ......
Page 14: ...Safety 10 T 305...
Page 28: ...4 T 305...
Page 40: ...16 T 305...
Page 50: ...26 T 305 Figure 12 Standard Configuration Report...
Page 112: ...88 T 305...
Page 164: ...140 T 305...
Page 167: ...143 T 305 Based on drawings 62 10526 Rev and 62 10736 Rev Figure 90 Electrical Schematic CA...
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