Braun RA200 service manual Troubleshooting, Movement

Troubleshooting

Troubleshooting Guide

Problem	Possible Cause	Possible Solution
Carriage and ramp	Designed allowable tolerances	No action required unless other problems
misalignment during		observed.
in/out movement
Deployed platform	Chain tension or position with	Inspect/check carriage “full out alignment”
misalignment with bus	carriage sprockets
threshold
Repeating obstruction	Misalignment of carriage	Inspect/check carriage “full out alignment”
sensed during in/out	Differential in chain tension	Inspect drive chains
movement		Inspect extruded guide rails
	Debris on extruded guide rails	Check for identifying marks on all skid pads, etc.
	Mechanical interferences	Check supply voltage
	Low/high supply voltage	Place controller in ‘service’ mode and cycle ramp.
	Exceeded current draw limits of	If no obstructions occur, return controller to
	control box	‘operating’ mode and clean and lubricate
		platform assembly. If obstructions do occur in
		‘service’ mode, discontinue use and contact
		authorized Braun representative.
Repeating obstruction	Loss of full out sensor signal	Inspect sensor LED during up/down movement. If
sensed during up/down		LED is intermittent, reposition sensor as
movement		required to ensure sensor remains lit during up/
		down movement.
	Threaded bar ramp supports	Cut off excess threaded bar ramp supports to
	interfere with carriage	allow proper clearance
	Platform contacting floor level	Reposition floor level sensor pick-up
	edge
	Platform contacting union bar	Reposition stow level sensor pick-up
	during inward movement
Grinding/rubbing sound	Threaded bar ramp support	Grind leading edges of threaded bar if noise
during in/out movement	rubbing on front cover skid pad	intolerable
	Debris on extruded guide rails	Inspect extruded guide rails
Front cover remains open	Hinge springs fractured	Replace hinge
when platform is stowed	Carriage/platform misalignment	Inspect/check carriage “full out” alignment
Manual release cable	Slider binding in guide	Remove slider. Check for foreign debris, metal
pulls too hard		shavings, or spring interference. Clean and
		lubricate.
Manually released plat-	Left/right drive chain tension	Adjust drive chain tension.
form pulls too hard	excessively high
Manual release will not	Spring failed/has interference	Inspect spring and correct as needed
reengage properly	Slider binding in guide	Inspect, clean and lubricate slider and guide
	Manual release giving false	Inspect and adjust manual release sensor
	signal	position

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