Big Joe Joey J1 Series Maintenance And Repair Parts Manual page 32

Table 3-4 Troubleshooting Chart (EPS-AC0 Controller) - Continued
ERROR ERROR TEXT
222 FB POT LOCKED
223 JERKING FB POT
225 CURRENT GAIN
226 NO SYNC
227 SLAVE COM. ERROR Main uC and Slave uC communicate via
237 WAITING DATA
3-16
POSSIBLE CAUSE
In application with a feedback potenti-
ometer, this alarm occurs if the feed-
back potentiometer (CPOT on CNB#6)
does not change (or changes in the
opposite direction) its value even if
commanded to change.
In application with toggle switches with
ENCODER CONTROL to off, this
alarm occurs if the feedback encoder
counting does not change its value
even if commanded to change.
This alarm occur if the feedback potenti-
ometrer (CPOT on CNB#6) changes
with a jerk larger than 0.3 V in 16
msec. This alarm is used to catch a
discontinuity in the voltages of the
feedback potentiometer.
This alarm occurs when the parameters
to compensate for the gain of the cur-
rent amplifiers (ADJUSTMENT #03
and ADJUSTMENT #04) have the
default values.
Every 16 msec, inside the code cycle,
the main uC rises and then lowers an
input for the slave uC (SYNC). When
the slave uC detects no edge for more
than 100 msec on this input, this alarm
occurs. This is just a watch dog func-
tion: when the main uC does not exe-
cute the code cycle it does not update
the SYNC signal and the slave uC cuts
off the steer and traction.
a local serial interface. This alarm
occurs when the main uC does not
receive the communication from the
slave uC through this serial interface.
This warning occurs only if CAN BUS is
PRESENT. At the eps-ac0 asks to the
traction controller to send a list of
parameters via CAN Bus. From the
request until the parameters are cor-
rectly relieved, this warning occurs.
The steer is not activated yet, and the
safety relays remain open when this
warning is present.
FAULT CLEARANCE
In application with the feedback with the
feedback potentiometrer, verify the
feedback potentiometer is not mechan-
ically loosened.
Check there is not a mechanical block of
the steered wheel. Be sure the wiper
has not reached its own electrical limit
because of too much angle of the
steered wheel. Besides, this alarm
may occur at the installation when the
motor rotates in the wrong direction
from the command.
Change the feedback potentiometer.
Replace the controller.
Replace the controller.
Replace the controller.
BL-J1-0315 - 11-19-2019