HAKO Scrubmaster B 120 R Service Booklet page 73

9. Drive
9.2 Service codes DMC control unit
Code Name
Drive error faults -Commences gracefull neutral brake - requires a neutral recycle action to reset fault
9 Memory chip fault
10 2 directions active
11 Seat switch not closed or timed out No release signal from Machine Control Unit
12 Wrong Power Up sequence
Accelerator signal is active
13
at Power Up
14 CAN-Bus
Description
Memory not accessible
forward and Reverse direction active
Forward, Reverse or FS1 (-A04.A3) active
before key switch on
Speed signal is >50% at power up
Stop via CAN
Remedy
Internal voltage <12V; replace Drive Control Unit
Check the wiring of the direction switch
(-A02.X6 and -A04.A1/A2)
Check the wiring from -A01.X10:2 to -A04.A4
(should be connected to battery minus)
Pay attention to the starting sequence: key switch /
seat switch, direction switch, potentiometer switch.
Check the wiring between -A02.X6 and -A04.A1/A2
Machine Control unit send Stop Signal via CAN-Bus
Sheet 73