Braun NUVL855RM24 service manual Adjustments and Calibration, Adjustment Procedures

Adjustments and Calibration

Adjustment Procedures

Lift Out Switch: The Lift Out Switch stops inward travel of the carriage/platform during Stow function (activated by the housing-mounted Lift Out Cam).

Move cam in to increase inward travel. Move cam out to decrease inward travel.

Full Out Switch: The Full Out Switch stops outward travel of the carriage/platform during Deploy (Up/ Down) functions (activated by the housing-mounted Full Out Cam). Move cam in to decrease outward travel. Move cam out to increase outward travel. Carriage rollers must be inside housing a minimum 1/2". The platform will not raise or lower until this switch is activated.

Floor Level Switch: See page 6 for procedures.

Below Stow Switch: The Below Stow Switch controls the height of the carriage/platform before it moves inward during the Stow function (activated by the torque tube-mounted Below Stow Cam). Rotate the cam in to decrease platform height. Rotate the cam out to increase platform height. Adjust cam so lifting arms are aligned. View the platform position in the housing.

Barrier Down Switch: This platform-mounted switch prohibits the platform from raising unless the outer barrier is in the full up position. The Up function is prohibited if the outer barrier detent pin is not fully engaged also.

Switch 0: The switch (activated by the torque tube- mounted Switch 0 cam) interrupts downward travel of the platform during the Down function. This allows the vehicle door to be closed during the remaining unloading procedures. After the door is closed, down- ward travel can be restarted. Rotate the cam in to lower the height of the stopping position. Rotate the cam out to raise the height of the stopping position.

Switch 1: This switch (activated by the torque tube- mounted Switch 1 cam) interrupts upward travel of the platform during the UP function. This allows the vehicle door to remain closed until the lift approaches floor level. After the door is opened, upward travel can be restarted. Rotate the cam in to lower the height of the stopping position. Rotate the cam out to raise the height of the stopping position.

Drive Chain Adjustment

In event the drive chain sags 1/2" or more, adjust ten- sion as detailed. Tighten to eliminate visible sag but do not overtighten.

1.Remove bottom pan.

2.Pull the manual release cable and lock.

3.Remove adjustment bolt (tensioner) access cover.

4.Loosen inside jam nut. Secure tensioner and tighten outside jam nut. Tighten to eliminate visible chain sag but do not overtighten.

5.Lock jam nuts together making sure the tensioner

roller is horizontal. Release and push the manual cable in fully. Ensure platform is locked by moving the plat- form in and out until chain release assembly engages chain.

Carriage Ride Height Adjustment

The carriage horizontal arms move (roll) in and out of the housing tracks on roller bearings. Following instal- lation or extensive lift operation, clearance between horizontal arms and tracks may diminish. The eccentric shaft mounting plate allows height adjustment.

Remove eccentric plate mounting screw. Using screw- driver or small rod, rotate the shaft clockwise to in- crease carriage height. Rotate the shaft counterclock- wise to decrease carriage height. Reinstall mounting screw in nearest retainer hole. Adjust left and right side eccentric shafts (screw positions may vary from side to side). Adjust height such that horizontal arms do not contact top or bottom of tracks (align center).

Calibration Procedures

Platform Sense Calibration

1.There must be no weight on platform.

2.Press hand held pendant UP switch to raise platform a minimum 3" above stow level.

3.Press and hold control board mounted 50# CAL but- ton. While pressing the 50# CAL button, press and hold the handheld pendant STOW switch (button).

The platform will lower to stow level (begin stow function), and then start to raise. Release 50# CAL button immediately when platform starts to raise from stow level.

4.After calibration, the LCD screen should read “PF OCCUPIED” whenever there is 50 pounds or more present on the platform.

Ground Sense Calibration

1.Press hand-held pendant DOWN switch to lower platform fully to ground level.

2.While continuing to press the pendant DOWN switch, press and then release control board mounted O_BAR button.

3.Release the pendant DOWN switch.

4.After calibration, the LCD screen should read “GND LVL 1” (in diagnostic mode) whenever the platform is at ground level.

Outer Barrier Occupied Calibration

1.Press hand-held pendant DOWN switch to lower platform fully to ground level.

2.Once outer barrier is fully unfolded (ramp position), release the pendant DOWN switch.

3.Press and hold the control board mounted O_BAR button. While holding O_BAR button, press hand- held pendant UP switch to raise the outer barrier. Be sure to release O_BAR button when outer barrier reaches approximately half full up (vertical) position.

4.After calibration, the LCD screen should read “OUT- BAR OCCUPIED” whenever there is weight present on the outer barrier.

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