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DN530
Operator Manual 41
Appendix F: Service Information
This appendix contains routine service and maintenance instructions.
Routine maintenance
To help keep your DN530 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 DN530 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 rear fuse compartment, and close the drawer.
After replacing a fuse, check that the unit is working properly.
Always ensure that there is a spare fuse available.