MP-3000 Controller
71
•“FLOW CYCLE”: Evaporator fans cycle
between high and low speed every 60
minutes.
•“FLOW HIGH”: Evaporator fans operate
continuously on high speed.
•“FLOW LOW”: Evaporator fans operate
continuously on low speed.
5. With the desired state in the menu line, press
and hold F4 key until the cursor stops
flashing. The new mode setting appears in the
display. When the Bulb mode is active:
• The defrost termination temperature can
be adjusted from 4 to 30 C (40 to 86 F).
Lower defrost termination settings may
result in less warming of the cargo during
defrost.
• The Dehumidify mode is on. A humidity
setpoint for dehumidify system operation
must be entered.
6. Press the F3 key to scroll to the “DEFROST
TERM” line.
7. To enter a new defrost termination
temperature, press the F4 key. An Enter
Arrow appears in the menu line and the
current temperature disappears.
8. Enter (type) the new termination temperature
setpoint in the LCD display using the general
purpose keypad. The cursor moves to the right
of the screen as each key entry is
acknowledged and displayed.
NOTE: The defrost termination temperature
setting during Bulb mode operation should
be established by the shipper. Always check
that the temperature entered in the LCD
display is correct before proceeding.
9. Press and hold the F4 key until the cursor
stops flashing. The new setpoint is recorded in
the controller and appears in the LCD display.
10. Press the F3 key to scroll to the “HUM
CONTROL” line.
11. To enter a new setpoint, press the F4 key. An
Enter Arrow appears in the menu line and the
current setpoint disappears.
12. Enter (type) the new setpoint in the LCD
display using the general purpose keypad. The
cursor moves to the right of the screen as each
key entry is acknowledged and displayed.
NOTE: The humidity setpoint should be
established by the shipper. Always check that
the setpoint entered in the LCD display is
correct before proceeding.
13. Press and hold the F4 key until the cursor
stops flashing. The new setpoint is recorded in
the controller and appears in the LCD display.
14. Press ESC key to exit the Setpoint screen.
NOTE: If the Bulb mode is active, the
controller LCD display will show “BULB”
and current humidity setpoint.
Changing the USDA Trip Setting
1. Press the SETPOINT key. The Setpoint menu
appears with the cursor in the “TEMP SETP”
line.
2. Press F3 key to scroll to “USDA TRIP” line.
3. To change the mode setting, press the F4 key.
An Enter Arrow appears in the menu line and
the current setting disappears.
4. Press F2 key to toggle between “OFF” and
“ON”.
• OFF: Controller removes the Defrost
Termination Temperature and Defrost
Time settings from display.
• ON: Controller adds Defrost Termination
Temperature setting and Defrost Time
setting in the Setpoint menu.
5. With the desired state in the menu line, press
and hold F4 key until the cursor stops
flashing. The new mode setting appears in the
display. When the “USDA TRIP” is on:
• The defrost termination temperature can
be adjusted from 4 to 30 C (40 to 86 F).
Lower defrost termination settings may
result in less warming of the cargo during
defrost.
• The defrost time can be adjusted from 2 to
8 hours. Lower defrost time settings result
in more frequent defrosts.