332 Maintenance and hardware diagnostics
ACS550 and ACH550
(3AFE68735190 [English]), available on the Internet (go to
and enter the code in the Search field).
Power connections
WARNING!
Read and follow the instructions in chapter
on page
. Ignoring the instructions can cause physical injury or death, or
damage to the equipment.
1. Stop the drive and disconnect it from the power line. Wait for five minutes to let the
drive DC capacitors discharge. Ensure by measuring with a multimeter
(impedance at least 1 Mohm) that there is no voltage present.
2. Check the tightness of the power cable connections. Use the tightening torques
given in section
Terminal and lead-through data for the power cables
on page
.
3. Restore power.
Control panel
Cleaning the control panel
Use a soft damp cloth to clean the control panel. Avoid harsh cleaners which could
scratch the display window.
Changing the battery in the Assistant control panel
A battery is only used in Assistant control panels that have the clock function
available and enabled. The battery keeps the clock operating in memory during
power interruptions.
The expected life for the battery is greater than ten years. To remove the battery, use
a coin to rotate the battery holder on the back of the control panel. Replace the
battery with type CR2032.
Note:
The battery is NOT required for any control panel or drive functions, except the
clock.
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Industry Automation
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