EP Equipment LIST JX0, Service Manual

Page: 149 / 206

REV. 07/2019
ELECTRICAL SYSTEM
8
136
Error Message
Possible cause Fault elimination
Error
Error text
177 ENCODER ERROR
This fault occurs when the
frequency supplied to the motor is
higher than 30 Hz and the signal
feedback from the encoder has
a too high jump in few tens of
milliseconds. This condition is
related to an encoder failure.
"1- Check the electrical and
the mechanical functionality
of the encoder and
the wires crimping.
2- Check the mechanical
installation of the encoder, if
the encoder slips
inside its housing it will raise
this alarm.
3- Also the electromagnetic
noise on the sensor can be
the cause for the
alarm. In these cases try to
replace the encoder.
4- If the problem is still
present after replacing the
encoder, the failure is in
the controller"
178 MOTOR TEMP. STOP
The temperature sensor has
overtaken the threshold defined by
STOP MOTOR TEMP.
"1- Check the temperature
read by the thermal sensor
inside the motor
through the MOTOR
TEMPERATURE reading in
the TESTER function.
2- Check the sensor ohmic
value and the sensor wiring.
3- If the sensor is OK,
improve the cooling of the
motor.
4- If the warning is present
when the motor is cool,
replace the controller."
179 STEER SENSOR KO
The voltage read by the micro-
controller at the steering-sensor
input is not within the STEER
RIGHT VOLT ÷ STEER LEFT VOLT
range, programmed through the
STEER ACQUIRING function
"1- Acquire the maximum
and minimum values
coming from the steering
potentiometer through
the STEER ACQUIRING
function. If the alarm is
still present, check the
mechanical calibration and
the functionality of the
potentiometer.
2- If the problem is not
solved, replace the logic
board."