Dokument-No.:2013366
Version a
page
12
Creation date: 28.11.2007
5.
Trouble-Shooting
A malfunction which can cause the blocking element not to move can have several different
causes. The most frequent causes and their remedies are listed below.
—
Cause:
power is interrupted.
Remedy:
check the electrical lines of the current entry. With power failure implement hand
operation (see section 2).
—
Cause:
power is present. Even so motor does not run.
Remedy: check motor for operability and if necessary replace the motor.
—
Cause:
power is present, motor runs but the blocking element does not move.
Remedy: check system pressure and the valve function.
—
Cause:
operating pressure is too low
Remedy: adjust the pressure limit valve (increase operating pressure).
—
Cause:
blocking element is mechanically blocked.
Remedy: check if a foreign object is blocking the blocking element. If necessary take off the
cover plate and remove the foreign object.
—
Cause:
blocking element is distorted.
Remedy: repair the blocking element and/or replace it.
Other malfunctions and their remedies:
—
Blocking element moves too slowly.
Cause:
hydraulic oil is too old and/or too thick.
Remedy: adjust the damping into open and closed position valve, regulating valve and the
pressure limit valve.
—
blocking element does not reach the end position
Cause:
proximity switches are misaligned
Remedy: align the proximity switches.
—
hydraulic cylinder makes loud noises during operation.
Cause:
piston rod glands are dry.
Remedy: lubricate the piston rod (piston rods).
—
hydraulic pressure too low, e.g. due to a leak
Cause:
screwed pipe joint is leaky
Remedy: tighten screw connection, correct oil level.
During all maintenance and repairs all regulations and safety
precautions for persons and machines are to be adhered to
without fail.
