PI M-228 Series, User Manual, Page: 35 / 49

8 Troubleshooting
M­­228 / M­­229 Linear Actuators MP86E Version: 2.0.0 31
Problem Possible causes Solution
Reduced positioning
accuracy
Mounting nut is too tight

Do not overtighten the nut (torque
≤15 Nm).
Function impairment
after system
modification
 Motor controller was
replaced

M-228 / M-229 was
replaced by another
model
Motor controller from PI:

Load the parameters from the
positioner database that
correspond to the combination of
motor controller and M-228 /
M-229 model.
Motor controller from a third-party
supplier:

Check the operating parameters.
The mechanics do not
move
The cable is not connected
correctly or is defective

Check the connecting cable.
Lateral forces are acting on
the pusher
Lateral forces increase the friction on
the internal drive components.

Avoid lateral forces on the tip and
on the pusher of the M-228 /
M-229.
The mechanics do not
move, but generate
operating noise
Values for the velocity,
acceleration and/or load are
too high

Reduce the velocity.

Reduce the acceleration.

Reduce the load on the mechanics.
The mechanics did not
stop in time and ran
into the hard stop

Velocity is too high (see
chapter "Limit Switches"
p. 13)

Limit switch is defective

Motor controller ignores
the limit switch signal
1. Stop the motor.
2. Command the mechanics away
from the hard stop.
3. Check the settings of the motor
controller for the limit switch
processing.
If the problem that occurred with your system is not listed in the table above or cannot be
solved as described, contact our customer service department (p. 33).
8 Troubleshooting