AEMZP0EA - EPS-AC0 SWs&ENC - User Manual Page - 87/95
- Remedy: It is necessary to replace the controller.
7) MAIN CONT. OPEN
CAN Bus Code = 48
- Cause: This alarm occurs only when the setting CAN BUS is PRESENT.
Then the eps-ac0 waits for a via CAN information that the traction
controller has closed the main contactor. If this information lacks
more than about 1.5 secs, this alarm occurs.
- Remedy: Find, on the traction controller, the reason for keeping the main
contactor open.
8) CAN BUS KO
CAN Bus Code = 247
- Cause: This alarm occurs only when the setting CAN BUS is PRESENT.
Then the eps-ac0 must receive the event messages from the
traction controller. If these messages lack more than about 1 sec,
this alarm occurs.
- Remedy: Check the CAN Bus communication system and analyse the
frames from the traction controller to the steer controllers.
9) MOTOR LOCKED
CAN Bus Code = 220
- Cause: This alarm occurs if the current in the steering motor stays higher
than 90% of the maximum current longer than 1 sec.
- Remedy: Search for a mechanical problem locking the motor. To make
easier the fault catching, set DEBUG OUTPUT to level 11 (see
11.4.6.4).
13.1.3 Three Blinks Alarms
1) D LINE SENSOR KO
CAN Bus Code = 243
- Cause: This alarm occurs when the mean voltage on the Direct line of the
stepper motor (connection CNA#9) is not null: the voltage on every
stepper motor line is a sine wave with null mean voltage.
- Remedy: Check the continuity of the stepper motor connections. In particular
the resistance between CNA#9 and the minus battery (with the
stepper motor at rest) is expected being very low (close to 30
ohms).
2) Q LINE SENSOR KO
CAN Bus Code = 242
- Cause: This alarm occurs when the mean voltage on the Quadrature line
of the stepper motor (connection CNA#8) is not null: the voltage on
every stepper motor line is a sine wave with null mean voltage.
- Remedy: Check the continuity of the stepper motor connections. In particular
the resistance between CNA#8 and the minus battery (with the
stepper motor at rest) is expected being very low (close to 30
ohms).
3) S.P OUT OF RANGE
CAN Bus Code =248
- Cause: This alarm occurs for a fault on the command potentiometer
(CPOC1 on CNA#9, CPOC2 on CNA#8).
When a single command pot is chosen, the alarm occurs if its
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