Carel MPXPRO - Page 25

25
ENG
MPXPRO - + 0300055EN rel. 1.1 30/08/10
“E
2
V” area: override position of the electronic
expansion valve
In this section, the position of the electronic expansion valve can be
controlled manually. As in the other cases, the override function is
activated by pressing the button once. When pressing one of the buttons,
the display shows the position reached for 3 seconds, then resumes the
display of the previous variable, to allow the position of the valve to
be changed and then immediately observe the result. Speci cally, the
various buttons have the following functions:
Res. E
2
V
0
+
I
/
0
E
2
V
Open/Close
+10stp/+5%
-10stp/-5%
I
/
0
• cyclically open/close the expansion valve
completely, each command is signalled on the
display by the message “OPn”, if the valve is opening,
or “CLo” if the valve is closing, for 3 seconds;
+
• increase the position of the valve. The e ect
depends on the type of valve con gured. For E
2
V
stepper valves, each time the button is pressed the
position of the valve increases by 10 steps, while for
PWM valves it increases by 5%;
• decrease the position of the valve. As above, for E
2
V
stepper valves the position decreases by 10 steps,
while for PWM it decreases by 5%;
• Res E
2
V: pressed for 5 seconds, restores the normal
operation of the electronic valve. This button is
used to disable the override on the electronic
expansion valve only.
Disabling the overrides
The MPXPRO remote control can disable the overrides in four di erent
ways:
with the “Restore ALL” button
• Pressed brie y (1 sec) from the main menu: disables the overrides of
the digital outputs in the “Outputs” section
• Pressed brie y (1 sec) from the “Commands” menu: disables the
override on each individual variable
• Pressed and held (5 sec) from the main menu: completely disables all
the overrides
with the “Res. E
2
V” button”
• Pressed and held (5 s): disables the override on the electronic valve
only (E
2
V or PWM)