Braun NUVL855RM24 service manual Troubleshooting Diagnosis Chart, Function Possible Cause Remedy

Models: NUVL855RM24

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Troubleshooting Diagnosis Chart

WARNING

Troubleshooting and repair procedures must be performed as specified by au- thorized service per- sonnel only. Failure to do so may result in serious bodily injury and/or property damage.

If a problem occurs with your lift, discontinue operation imme- diately! Do not attempt repairs yourself. Contact your dealer or call The Braun Corporation at 1-800-THE LIFT®. One of our national Product Support repre- sentatives will direct you to an authorized service repairman who will inspect your lift.

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

remedy can then be determined by process of elimination. A Electrical Schematic, Hydraulic Diagram and Hydraulic Schemat- ic are provided to aid in trouble- shooting.

A Repair Parts section with ex- ploded views and corresponding parts lists is also provided. Cor- rect the problem if possible. If the problem continues, contact The Braun Corporation.

FUNCTION

POSSIBLE CAUSE

REMEDY

 

1.11

Low battery

Check vehicle battery

 

1.12 Bad ground

Check for good ground between vehicle chassis

 

 

 

and 3/8” bolt on back of power pack.

1.00

1.13

Poor plug connections

Check all plugs for proper contact.

NO

 

 

 

OPERATION

1.14

Blown fuse

Check fuses on P.C. board.

 

1.15

Circuit Sentry

Reset circuit breaker.

 

1.16

Defective Interlock

Check for voltage on red wire with gray stripes in

 

 

 

interlock plug connected to P.C. board.

 

 

 

 

 

 

 

 

2.11 Hydraulic Down valve open

Flush valve by operating Up and Down manual

 

 

 

override switches at same time for 4 to 5 seconds

2.00

 

 

several times.

 

 

 

PUMP RUNS

2.12

Pump mounted horizontal

Power pack must be mounted vertically.

BUT WILL

NOT LIFT

2.13

No oil (low)

Check fluid level. Use 5606 aviation fluid only (part

PLATFORM

 

 

 

87010R). Check fluid level with platform lowered

 

 

 

fully. Fill to within 1-1/2" of the bottom of the fill

 

 

 

tube (neck).

 

 

 

 

 

 

3.00

3.11 Up Solenoid

Check for power on pump black wire going from

 

 

solenoid to motor.

PUMP DOES

 

 

 

 

 

NOT RUN WITH

3.12 Bad power and ground

See 1.00

OVERRIDE

 

 

 

SWITCH OR

 

 

 

HAND-HELD

 

 

 

PENDANT

 

 

 

 

 

 

 

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Braun NUVL855RM24 service manual Troubleshooting Diagnosis Chart, Function Possible Cause Remedy