PROALL P Series, Руководство по обслуживанию, Страница: 14 / 118

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Checking operation:

To check actual sensor output, go to the Digital Readouts
screen. Here you will find all the main mixer process
information in digital format.

The counts are the total counts accumulated by the
speed sensor. If the sensor is counting, then it is working.

The speed sensor RPM is the actual RPM reading of the
function. The small number on the bottom left is the
RPM set-point. When the mixer is running in mix mode the
actual RPM should match the set-point. These numbers
may bounce up and down 1RPM depending on the function
but should follow each other.

If the actual and set-point RPM numbers are not following
each other the mixer will go into an auto fault for that
function. See fault description for next steps.
5.2 CONTROL VALVES
5.2.1 COIL REMOVAL
WARNING!
When installing cartridge valve coil nuts do not use pliers or any other hand tools to tighten. These nuts only
need to be hand tight. Excessive tightening can stretch and distort the cartridge valve body causing the spool to
stick.
Cartridge Valves:

To remove cartridge valve coil, unplug the electrical cable
and unscrew and remove coil nut and spacer . Slide the
coil assembly back from cartridge body to remove.
Sectional Valves:

To remove direct acting coil, unplug the electrical cable and
unscrew and remove the coil nut . Slide the coil back
from the core tube to remove.

To remove pilot operated coils, unplug the electrical cable.
Use a #3 metric Allen key to remove the two socket head
cap screws . Pull the coil up and out of the body. Be
careful not to drop any contaminants into the coil cavity as
this is a pilot operated valve and contamination can cause
the valve to malfunction.
B
A
A
B
D
C
C
D
F
G
E
E
F
G