We recommend the following troubleshooting sequence.
Problem
Possible cause
Remedy
NOTICE
When using several SERVO-DRIVE switches in one cabinet, all
SERVO-DRIVE switches must be checked individually.
Troubleshooting
1
Front does not move
either by pressing on
the front or pressing the
SERVO-DRIVE switch
Front and/or SERVO-DRIVE switch
was not pressed long enough
Make a deliberate effort to press the
front and/or SERVO-DRIVE switch
(to the full extent of travel)
Front and/or SERVO-DRIVE switch
was pressed too long (leaning pro-
tection triggered)
Press the front and/or SERVO-
DRIVE switch for a briefer time
Blum transformer is not connected
to the power outlet
• Connect the flex to the Blum trans-
former and to the power outlet
• Turn on the switched outlet
Battery was inserted incorrectly into
the SERVO-DRIVE switch
╵→ Battery display on the SERVO-
DRIVE switch lights red
Insert battery correctly
Drive unit is not attached properly to
the lift mechanism
Correctly install drive unit
The SERVO-DRIVE switch is not
activated
Activate the SERVO-DRIVE switch
Collision avoidance was activated
in error
╵→ A second front would be open if
this scenario is correct
Deactivate collision avoidance
Battery is dead
Replace battery
SERVO-DRIVE switch is defective
Replace SERVO-DRIVE switch
Drive unit is defective
Replace drive unit
Cabling or Blum transformer is
defective
Replace cabling and/or Blum
transformer
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