Braun NUVL855RM24 service manual Lift will

Troubleshooting Diagnosis Chart

FUNCTION		POSSIBLE CAUSE	REMEDY
	4.11	Outer Barrier switch is out of	Check diagnostic LCD for Outer Barrier switch sta-
4.00		adjustment or defective.	tus. Barrier is down or barrier release pin partially
LIFT WILL			out. Adjust or replace switch as necessary.
GO UP WITH	4.12	Full Out switch is not activated or
OVERRIDE			Check diagnostic LCD for Full Out switch status.
SWITCH BUT		defective.	Adjust or replace switch as necessary.
NOT WITH
HAND-HELD	4.13	Hand-held pendant not working	Check for hand-held pendant illumination and con-
PENDANT		properly.	tinuity of the switches. Verify SW1 and Door Open
			switches are functioning correctly.
5.00	5.11	Hydraulic Down valve bad	Check for power on red “valve” wire from P.C.
LIFT WILL
NOT GO			board to Down solenoid when pushing override
DOWN WITH			switch or hand-held pendant button. Replace if
OVERRIDE			necessary.
SWITCH
OR WITH	5.12	Dirty Down valve (clogged)	Flush valve by operating Up and Down manual
HAND-HELD			override switches at same time for 4 to 5 seconds
PENDANT,
			several times.
GOES DOWN
SLOWLY OR
LIFT DRIFTS
DOWN BY
ITSELF
6.00			Check diagnostic LCD for Full Out switch status.
LIFT WILL GO	6.11	Full Out switch out of adjustment or
DOWN WITH		defective.	Adjust or replace switch as necessary.
OVERRIDE
SWITCH BUT	6.12	SW0 and/or Door Full Close switch-	Check switches for proper operation/adjustment.
NOT WITH		es out of adjustment or defective.	Adjust or replace switch as necessary.
HAND-HELD
PENDANT
7.00
LIFT WILL NOT	7.11 Poor plug connections		Check harness connections A1, A2, B1 and B2
EXTEND WITH
OVERRIDE	7.12	Bad In/Out motor	Check power at motor. Replace motor if necessary.
SWITCH OR
HAND-HELD	7.13 Bad power and ground		See 1.00
PENDANT
	8.11	Stow Level switch out of adjust-	Check diagnostic LCD for Stow Level switch sta-
		ment or defective.	tus. Adjust or replace switch as necessary.
8.00	8.12	Platform is occupied or out of	Remove weight from platform. See Platform
LIFT WILL NOT		calibration	Sense Calibration on page 5.
STOW WITH	8.13	SW0 and/or Door Full Closed	Check switches for proper operation/adjustment.
HAND-HELD
PENDANT		switches out of adjustment or	Adjust or replace switch as necessary.
		defective.
	8.14	Handrail Belt	Belt must be latched until platform is at stow level
			and must be unlatched before platform will stow.

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