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,
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,
Insert a new fuse in the furthest fuse compartment and close the drawer.
After replacing a fuse, check that the unit
Always ensure that there is a spare fuse available.
DN540 |
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Operator Manual | 39 |