1 Safety1.3.4. WARNING - The brake release buttons may be jammed after service work393HAC020993-001 Revision: G© Copyright 2004-2008 ABB. All rights reserved.1.3.4. WARNING - The brake release buttons may be jammed after service workDescriptionThe brake release unit has push buttons for brake release of each axis motor. When servicework is performed inside the SMB recess that includes removal and refitting of the brakerelease unit, the brake release buttons may be jammed after refitting!In case the power is turned on while a brake release button is jammed in depressed position,the affected motor brake is released! This may cause serious personal injuries and damage tothe robot!EliminationTo eliminate the danger after service work has been performed inside the SMB recess, followthe procedure below:Action1. Make sure the power is turned off.2. Remove the push button guard, if necessary.3. Check the push buttons of the brake release unit by pressing them down, one by one.Make sure none of the buttons are jammed in the tube.4. If a button gets jammed in the depressed position, the alignment of the brake releaseunit must be adjusted so that the buttons can move freely in their tubes!
