Nilfisk-Advance SC401 Series - Drive Wheels Controller (EB3) Alarms

94Service Manual – SC401, SCRUBTEC 344 20 - Wheel System, Traction
Drive Wheels Controller (EB3) Alarms
Figure 5:
Diagnostic LED
Display of
Drive wheels
controller
(EB3)
diagnostic
LED
Meaning Conditions What to do Reset
Example of 3 blinking:
3 ashes Speed adjuster
(RV1) fault
Signal input out of range Check Speed adjuster
(RV1) connections and
functions
Turn o󰀨 the machine using
the Ignition key (KEY)
5 ashes Overtemperature Excessive Drive wheels
controller internal temperature
Check if there is debris or
damages preventing the
drive system operation
Turn o󰀨 the machine using
the Ignition key (KEY)
and wait a few minutes for
the system to cool down
before turning it back on
6 ashes Inner power section
fault
Short-circuit in power
MOSFET upon Drive wheels
controller start
Check if there are any
short-circuits in the Drive
motor wiring (M4). Try to
reset the machine, if the
alarm persists, replace the
Drive wheels controller
(EB3)
Turn o󰀨 the machine using
the Ignition key (KEY)
7 ashes Short-circuit
overcurrent
Overcurrent detected on the
output circuit (Drive motor)
due to a short-circuit
Check the Drive motor
(M4) wiring and functions.
Turn o󰀨 the machine using
the Ignition key (KEY)