7.2. MAINTENANCE INSTRUCTIONS
When carrying out maintenance
work, the system must be switched
off.
When carrying out maintenance work
on the fan unit, the system must be
disconnected from the mains.
Never pull the plug out of the fan
unit by the cable. Use a pair of pliers
and pull on the plug.
7.2.1. Dust fi lter maintenance
Step 1: pull the inside cover out of the mounting
tube.
Step 2: remove the fi lter from its holder.
Step 3: check the fi lter. When necessary, clean or
replace it.
Step 4: reinsert the inside cover (with the air intake
pointing upwards) into the mounting tube.
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Step 5: take out the pre fi lter, clean it and reas-
sembly it.
NOTE: after cleaning several times the fi lter
should be necessary change the PULSE FILTER
SET (5144308300).
7.2.2. Fan unit maintenance
Step 1: Pull the inside cover out of the mounting
tube.
Step 2: Unplug the fan (1) Pull the fan unit out of
the mounting tube using the strap (2), taking care
that the power / control cable is not damaged.
Step 3: Using a brush and a vacuum cleaner, clean
the fan grille and the rotor blades.
Step 4: Reinsert the cleaned fan unit into the mou-