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Code
Alarm
82
ENCODER
ERROR
83
BAD ENCODER
SIGN
84
STEER
SENSOR KO
85
STEER
HAZARD
86
PEDAL WIRE
KO
Pump
EPS
Traction
(P)
(E)
(T)
Description
Cause :
This fault is signalled in following conditions: the
frequency supplied to the motor is higher than 40 Hz and
the signal feedback from the encoder has a jump higher
than 40 Hz in few tens mSec. This condition is related to
a malfunctioning of the encoder.
Troubleshooting :
A)
Check both the electric and the mechanical encoder
functionality, the wires crimping.
B)
Check the encoder mechanical installation, if the
encoder slips inside its compartment raising this alarm
condition.
C)
Also the electromagnetic noise on the sensor bearing
can be a cause for the alarm. In these cases try to
replace the encoder.
D)
If the problem is still present after replacing the
encoder, the failure is in the controller.
It occurs when the ENC SPEED in the tester menu has
opposite sign than FREQUENCY in the tester menu.
Swap the channels of the encoder (CNB#8 with CNB#7).
This alarm occurs if the command potentiometer
(CPOC1 on CNA#9 or CPOC2 on CNA#8) changes with
a jerk larger than MAX SP SLOPE . This alarm is used to
catch a discontinuity in the voltages of the command
potentiometer.
This is just a warning to inform that the steering controller
is limiting the angle in the steering direction. No speed
reduction occurs on the traction.
Cause :
The SW continuously checks for the connection of the
two supply ends of the potentiometer in the accelerator.
The test consists of reading the voltage drop on a sense
diode, connected between NPOT (CNA#30) and GND
and cascaded with the potentiometer: if the
potentiometer gets disconnected on PPOT (CNA#25) or
NPOT, no current flows in this sense diode and the
voltage on the NPOT connection collapses down.
When the NPOT voltage is less than 0.3V this alarm
occurs. This alarm occurs also when the NPOT voltage
is higher than 2Vdc (to detect also the condition of a
broken sense diode).
Troubleshooting :
Check the voltage on NPOT and the potentiometer
connections.
7-79
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