Nilfisk SC800 ST User Manual

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Service Manual: SC750, SC800, SC 750 ST, SC800 ST

Form Number 56043150 Page 22

Troubleshooting

Fault Codes

SC750 and SC800 models - Any error codes detected by the Main Machine Controller will be displayed on the LCD display

as they occur.

SC750 ST and SC800 ST models – Acve faults are displayed as a blink code on the fault code indicator light. The code will

be a two digit code. The rst digit will ash out followed by a short pause. Then the second digit will ash out followed

by a long pause. (On, short pause, On, On, long pause is a code 1,2)

If mulple codes are present, the codes will appear in order unl all have been displayed. Then the sequence will repeat

again.

Fault Code Table

For SC750 and SC800 models, refer to the column “LCD Display Code”. For SC750 ST and SC800 ST models, refer to the

“ST Blink Code” column.

LCD

Display

Code

Blink

Code

Denion

Explanaon / Code Seng Condions / Flash Indicator

/ Disables / Check

3 1,1 Drive Motor Controller

Fault

The Drive Motor Controller has seen a problem and

has set a “Trip Code”. Trip codes are grouped into “Trip

Types” (On “Non-ST” models, count the Detergent LED

ashes to obtain the specic Drive system “Trip Type”

value. On “ST” models, count the High Soluon Flow LED

ashes. See the Wheel System, Tracon chapter, Trouble-

shoong secon for addional informaon)

Disables: Detergent, Soluon, Brush Motors.

4 1,2 Scrub Deck Li Actuator

Circuit Over Current

Excessive current draw was sensed. Code sets at approxi-

mately 5.8 amps or more.

Disables: Brush Head Actuator.

Check for shorted actuator, mechanical binding of actua-

tor linkage, shorted wiring.

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Nilfisk SC800 ST Heavy-Duty Cleaning