Nilfisk-Advance CS7000 Service Manual page 366

Service Manual – CS7000
DTC Error Source
13 AC Current –
Excessive
14 Position
calibration error
15 Steering
Actuator -
Encoder Circuits
21 Current
regulator
supervision
22 Position
regulator
supervision
Description
The software detected excessive
current flow in the steering actuator
motor circuits.
The "Center Position" has not been
able to be established. (Not properly
calibrated to right and left travel
limit switches.)
This error occurs when the steering
controller calculated actuator motor
position indicates the mechanism
is beyond a steering travel limit
switch position but the switch has
not indicated that the end has been
reached. (The steering controller
believes that the physical position
of the steered wheel is beyond the
"soft limit" that should have been
indicated by the steering travel
limit switch closing.) This error also
occurs when a steering travel limit
switch closes indicating that the
limit of travel has been reached but
the controller calculated position
indicates that the mechanism should
not be near the limit of travel.
Steering Actuator encoder feedback
error.
Difference between set value and
actual value for current regulator are
above limit.
Difference between set value and
actual value for position regulator
are above limit.
Check
Actuator - shorted/burned stator
windings.
Wiring (U, V & W) - Shorted to ground
or one another.
Steering Controller - Internal Short
Note: Can also be caused by too low DC
supply voltage on B+.
Excessive backlash in steering gears
Controller Configuration
Steering Limit Switches
Steering Limit Switch wiring
Wiring - between actuator encoder and
controller
Actuator - Encoder Signals
Obstructions to steering actuator gear
rotation.
Excessive gear backlash
Loose connection in steering actuator
encoder wiring.
Steering Actuator
Obstructions to steering actuator gear
rotation.
Excessive gear backlash
Loose connection in steering actuator
encoder wiring.
Steering Actuator
Steering System 366