Braun RA300 service manual Troubleshooting Diagnosis Chart

TROUBLESHOOTING

Troubleshooting Diagnosis Chart

WARNING

Troubleshooting and repair procedures must be performed DVVSHFLÀHGE\DQ authorized service technician only. Failure to do so may result in serious bodily injury and/or property damage.

If a problem occurs with your ramp, discontinue operation immediately! Contact your sales representative or call The Braun Corporation at 1-800-THE LIFT®. One of our national Product Sup- port representatives will direct you to an authorized service techni- cian who will inspect your ramp.

The cause of the problem can be determined by locating the lift function and related symptom in the Troubleshooting Diagnosis

&KDUW7KHVSHFLÀFFDXVHDQG remedy can then be determined by process of elimination. Wiring Diagrams, Electrical Schematics, Hydraulic Diagrams and Hydrau- lic Schematics are provided to aid in troubleshooting.

A Repair Parts section with an exploded view and corresponding parts list is also provided. Correct the problem if possible. If the problem continues, contact The Braun Corporation.

FUNCTION		SYMPTOM			POSSIBLE CAUSE	REMEDY
				1.11	Battery terminals dirty	Clean and tighten
				1.12	Chassis ground connection (frame	Clean and tighten. See Chassis Ground
					ground cables)	Corrosion on page 18.
				1.13 Battery damaged		Replace
				1.14	Battery discharged	Charge battery
		1.10		1.15	25 ampere in-line fuse faulty	Replace fuse
				1.16 Power cable		Check for loose terminals or broken wire
		No Power
				1.17	Vehicle Interlock(s) circuit incomplete	Correct or replace
		To Ramp		1.18	Vehicle-to-ramp wiring harness	Disconnect harness from ramp. Using
		(Circuit Problem)				volt meter, test (probe) 8-pin Deutsch
						male plug terminals as follows:
						Pin A = +12/24 V
1.00						Pin B = -Ground
						Pin C = V (when Stow switch is activated)
	NO					Pin D = V (when Deploy switch is acti-
OPERATION						vated)
				1.21	Ramp wiring harness	Remove relays from sockets. Using volt
						meter, test (probe) wires/terminals at
						relay sockets:
		1.20				Red = +12/24 V
						Black = -Ground
		Power to
						Blue = V (when Stow switch is activated)
		Ramp But
						Orange = V (when Deploy switch is
		No Pump
						activated)
		Operation		1.22	Faulty relay(s)	Replace
				1.22	Loose connection(s)	Clean and tighten
				1.24	Broken wire(s)	Repair
				1.25	Wire terminal(s)	Crimp tightly to wire
				2.11 See 1.00
				'ULIW2XW0LFURVZLWFKRXWRIDGMXVW-		See Microswitches in Systems Descrip-
2.00		2.10			ment or damaged	tions for details
DEPLOY			No	2.13	Drift Out Microswitch harness dis-	Connect, repair or replace
	(Out)	Operation			connected, damaged or otherwise
					damaged
						Contact Braun Product Support - replace
				2.14 Pump motor brushes worn
						pump
	continued		continued

Page 28