SICK GM35

96
8009441/YN36/V3-0/2015-08| SICKOPERATING INSTRUCTIONS|GM35
Subject to change without notice
MAINTENANCE
Fig. 70: Replacing the purge air filter element
8.4.3 Restarting and checking the purge air unit
▸ Make sure that any dust possibly escaping from the open end of the purge air hose
when the purge air unit is switched on again cannot be deposited on the measuring
system:
▸ Switch on the power supply to the purge air unit briefly (for approx. 2 min.) to remove any
loose dust. The purge air hose is not yet connected to the purge air fixture. When
connecting, knock the filter housing lightly to remove any dust particles.
▸ With the purge air unit switched on, check whether
– a uniform air current is created at the open end of the purge air hose
– the blower is operating quietly, without any noticeable vibrations or irregular noises.
▸ While the purge air unit is switched on, reconnect the purge air hose to the purge air
inlet on the purge air fixture. Make sure the hose clamp is secure.
▸ Test whether the low-pressure monitor to monitor the filter and the connected signal unit
are functioning correctly:
– Partly cover the extraction aperture of the air filter briefly using a piece of cardboard or
similar object (must not be sucked in or contaminate the filter).
– On the EvU: (menu diag, error message) determine whether the low-pressure monitor
responds by signaling that a filter change is necessary.
▸ Carefully reattach the purge air hose to the corresponding purge air connection on the
fixture and secure.
Filter element
Filter housing
Filter housing cover
Low-pressure
monitor