Step 6: Verify Removal Of All Dangerous Voltages; Step 7: Verify The Version Of The Bypass Control Board; Step 8: Remove The Control Panel From The Drive - ABB ACH400 Series Retrofit Manual

Step 6: Verify removal of all dangerous voltages.

 If the metal option mounting bracket is present, carefully remove
it. Remove and keep the two screws at the bottom of the shield.
A magnetic screw driver is helpful for this step.
 Use an appropriate meter to verify the absence of AC line voltage
on the load side of the main disconnect or circuit breaker.
! Warning! The main disconnect or circuit breaker for the unit is
BOTTOM FEED.
! Warning! Even when power is removed as directed above, dan-
gerous voltages from customer supplied external sources may be
present, particularly on the relay outputs, Terminals 17 – 22. Mea-
sure the voltage at these terminals before continuing. If voltage is
present, identify and disconnect the source.

Step 7: Verify the version of the bypass control board.

These instructions are written for those units that have the cur-
rent version E-Bypass control board.
 If your control board has two potentiometers as show in this pho-
tograph, it is the current version.
If your control board does not have two potentiometers as shown

in this photograph, it is the older version. These instructions are
NOT VALID for the older version E-Bypass control boards. If
your board is the older version, an upgrade kit can be purchased
separately.

Step 8: Remove the Control Panel from the drive.

Swing the panel out from either the top or bottom and remove it

from the connector.
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