HAKO Scrubmaster B260 R, Service Booklet

Page: 95 / 121

Slide 95
9. Drive
9.2.2 Service codes DMC control unit - Rear
Code Name Description Remedy
Hard Error Faults - Immediately stops pulsing and open line contactor - Cannot be reset (only by a key switch recycle)
20 Hardware over current trip Motor Over current Check Motor and Motor wiring
21 Contactor Coil driver fault
Coil of Line Contactor or Magnetic Brake short
circuit
Check Line contactor (-K03) and Magnetic Brake
(-M02) and it´s wiring
22 Battery Voltage is too high Voltage > 67V Excessive downhill ride?
23 Mosfet short circuit to Batt minus Low side Mosfet short circuit in neutral position Check Motor Insulation, if OK, replace drive Control Unit
24 Hardware Fail safe fault Hardware safty problem Check wiring. Replace Drive Control Unit.
25 Line Contactor failure
Relais Contacts are not closed within it´s time
Specification
Check the wiring of the line contactor (-K03)
Battery Voltage too low?
E-stop in Key switch circuit is active
Difference in the voltage between -A05.B+ and -A05.A10
during start up check
Open circuit from B+ to B- (Fuse -F04)