Midas DL451, Operator'S Manual

Page: 67 / 76

Service information
51
DL451 Modular I/O
Operator Manual
Service information
The service manual for this equipment is available for purchase. Please contact your
local distributor for details.
Routine maintenance
To help keep your DL451 Modular I/O unit in good working order and to make sure it
gives you optimum performance, we recommend that you carry out the following:
Monthly
• Clean the unit, as detailed in “Cleaning” on page 51.
• Check pushbuttons for freedom of operation.
• Check functionality of all pushbuttons, LEDs and the LCD display. You can carry out
a visual check of all LEDs, pushbutton backlights and LCD display by switching the
unit off and then on again, as all of these illuminate during power-up.
• Check functionality of equipment.
Yearly
• Clean the internal fans, see “Cleaning the internal fans” on page 51.
Cleaning
Cleaning the unit
Switch off the unit and electrically isolate it from the mains before cleaning.
Clean the DL451 Modular I/O using a dry, lint-free cloth. Do not use harsh abrasives or
solvents. When cleaning the unit, take great care not to damage the pushbuttons etc.
To clean the LCD screen, see “Cleaning the LCD display” on page 51.
Cleaning the LCD display
Carefully wipe the surface of the LCD display with a soft, lint-free cloth using ethanolic
liquid, such as a screen cleaner for LCDs, or by using a screen wipe specially designed
for the purpose. When cleaning the LCD display, please take the following precautions:
• Don’t use harsh abrasives, for example, paper towels.
• Don’t apply liquids directly to the screen.
• Don’t use ammonia-based cleaners and solvents, such as acetone.
If you are in doubt have any queries about cleaning the LCD display, please don’t
hesitate to contact us.
Cleaning the internal fans
The unit’s internal fans need to cleaned regularly to remove the build of dust, dirt etc.
We recommend that they are cleaned at least once a year, provided the unit has been
operated under normal conditions. However, if the operating conditions are more
adverse or extreme, for example, if the unit is operated in the vicinity of smoke
machines, new carpets etc., this frequency should be increased accordingly.
This procedure must be carried out by a fully qualified service engineer. If you have
any queries, please contact Midas; details can be found at the front of this manual.