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Menu Program Functions
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P-D Controller
CSR-20 & CSR-40, September 1999
8.
To load the new setting, press the ENTER key. The dis-
play briefly shows “PULP LOAD”.
9.
When the PULP mode is turned ON, the display then
shows “PULP ON”. The PULP sensor must now be cali-
brated for accurate temperature recording. To calibrate
the PULP sensor:
a.
To calibrate the PULP sensor, press the SELECT key
while “PULP ON” appears in the display. “PULP”
will begin to flash in the left display.
b.
Press the UP or DOWN key to show “CAL” in the
right display.
c.
Press the ENTER key. The display briefly shows
“PULP CALIB”. The left display then shows
“PULP1” and the right display shows the sensor tem-
perature (“00.0 C”).
d.
When PULP1 sensor temperature is within 1.7 C [3
F] above or below 0 C (32 F), the left display
(“PULP1”) begins to flash.
e.
Observe the sensor temperature in the right display.
When the temperature has been stable for 5 minutes,
press the ENTER key. The display briefly shows
“PULP1 LOAD”, then “PULP1” and the sensor tem-
perature (“00.0 C”), and returns to the “PULP ON”
display.
NOTE: The sensors should be in the ice bath
a total of 15 minutes or more to assure the
sensor temperature has bottomed out.
NOTE: Press and hold the SELECT key for 3 sec-
onds to return to the Standard Display.
Economy Mode
The Economy Mode reduces unit power consumption by
reducing evaporator fan operation. On frozen loads, the
Economy mode also modifies the temperature control algo-
rithm to extend the Null mode. The use of the Economy Mode
should be established by the shipper and the type of cargo.
The Economy Mode option is turned on from Program menu
of the controller.
NOTE: If the Economy Mode is set to ON, the con-
troller display will show “ECON ON” for 1 second
every 10 seconds.
•
Chill Loads (return air temperatures of -9.9 C (14.1 F) and
above): Evaporator fans operate on low speed whenever
the container temperature is In-range.
•
Frozen Loads (return air temperatures of -10 C (14 F) and
below): Unit continues on Cool operation until return air
temperature reaches ECMIN temperature. Default ECMIN
setting is 2.0 C (3.6 F) below setpoint. ECMIN tempera-
ture is adjustable from 0 to 10 C (0 to 18 F) below set-
point through the Guard menu of the controller.
The evaporator fans stop during the Null mode (on
frozen loads). A null state timer automatically starts and
operates the evaporator fans on low speed for 5 minutes
every 45 minutes. The unit remains in Null until the
return air temperature increases to ECMAX temperature
and a 45 minute Null state time sequence expires. Default
ECMAX setting is 1.0 C (1.8 F) above setpoint. ECMAX
setting is adjustable from 0 to 10 C (0 to 18 F) above set-
point through the Guard menu of the controller.
NOTE: See “Menu Guard” for detailed information
about changing ECMIN and ECMAX from the default
settings.
Setting the Economy Mode
1.
Press the SELECT key to enter menu (display shows
“MENU <--->”.
2.
Press UP key until display shows “MENU PRGRM”.
3.
Press the SELECT key to show “PRGRM <--->”.
4.
Press the UP or DOWN key until the display shows the
current setting:
• “ECON OFF”
• “ECON ON”
5.
To change the current setting, press SELECT key.
“ECON” will begin to flash in the left display.
6.
Press the UP or DOWN key to scroll the right display to
the desired setting.
7.
To load the new setting, press the ENTER key. The dis-
play briefly shows “ECON LOAD”. When the Economy
mode is turned ON, the display then shows “ECON ON”.
NOTE: Press and hold the SELECT key for 3 sec-
onds to return to the Standard Display.
