User's Manual

5. Maintenance
MF0145ASA.docx User’s Manual for ION
®
-M7HP/85HP EU Page 37
5.3. Cleaning the Heat Sink
To avoid a malfunctioning of the Extension Unit, the heat sink should be cleaned in
case of pollution. In order to prevent any damage, proceed as explained in the
following.
 Note: Read and observe chapter 1.2 Health and Safety as well as the
instructions in section 5.1 General before starting with the replacement
procedure. Then, proceed as follows:
1. Switch off the Extension Unit. For the following procedure ensure that power
supply connector has been disconnected before and that the fans have stopped
rotating.
2. Before any cleaning action, remove the fan guard and the fan unit from the
Extension Unit as described in the previous section 5.2 Replacing the Fan Unit.
3. Clean the ribs of the heat sink (see figure 5-1 Fan unit and heat sink) very
carefully with a soft brush (not metallic!). Take care that the material is not
scratched or damaged.
4. If necessary, use compressed air (max. 5 bar) to blow out the heat sink from
front to rear side.
5. In case the dirt cannot be blown out completely from the heat sink and parts of it,
still stick to the ribs, clean the parts concerned carefully from the front with the
soft brush. Take care that the material is not scratched or damaged.
6. After cleaning the heat sink, mount the fan unit and the fan guard again according
to section 5.2 Replacing the Fan Unit. Then, reconnect mains power and power
up the unit.