4.2.5 The brake release buttons may be jammed after service workDescriptionThe brake release unit has push-buttons for the brake release of each axis motor.When service work is performed inside the SMB recess that includes removal andrefitting of the brake release unit, the brake release buttons may be jammed afterrefitting.DANGERIf the power is turned on while a brake release button is jammed in depressedposition, the affected motor brake is released. This may cause serious personalinjuries and damage to the robot.EliminationTo eliminate the danger after service work has been performed inside the SMBrecess, follow the procedure below.ActionMake sure the power is turned off.1Remove the push-button guard, if necessary.2Verify that the push-buttons of the brake release unit are working by pressing themdown, one by one.3Make sure none of the buttons are jammed in the tube.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.4184 Product manual - IRB 6620LX3HAC035737-001 Revision: P© Copyright 2009-2018 ABB. All rights reserved.4 Repair4.2.5 The brake release buttons may be jammed after service work
