Klark Teknik DN540 specifications Appendix F Service Information, Routine maintenance, Cleaning

Appendix F: Service Information

This appendix contains routine service and maintenance instructions.

Routine maintenance

To help keep your DN540 unit in good working order and to make sure it gives you optimum performance, we recommend that you carry out the following at monthly intervals:

•Clean the unit (see “Cleaning” below).

•Check the controls for freedom of operation.

•Check the functionality of all controls, that is, control knobs, pushbuttons and LEDs. You can carry out a visual check of all illuminated items (LEDs etc.) by switching the unit off and then on again, as they should all illuminate during power up.

•Check the functionality of the equipment.

Cleaning

Switch off the unit and electrically isolate it from the mains before cleaning.

Clean the DN540 using a dry, lint-free cloth. Do not use harsh abrasives or solvents. When cleaning the unit, take great care not to damage control knobs, pushbuttons etc.

Replacing the mains fuse

The equipment must be independently isolated from the mains voltage supply before any attempt is made to change the protective fuse. The fuse and its cover must always be replaced before the equipment is reconnected to the mains voltage supply.

Only use the correct replacement type when changing the fuse. Fuse specification is printed on the rear cover.

To remove the fuse, pull out the fuse drawer (see “Mains input” on page 17). Then, prise out the fuse from the furthest compartment (the nearest compartment is for a spare fuse); a small, flat-bladed screwdriver may be useful for this.

Insert a new fuse in the furthest fuse compartment and close the drawer.

After replacing a fuse, check that the unit i-s working properly.

Always ensure that there is a spare fuse available.

DN540
Operator Manual	39