9.2.6.8
E630: Sensor holder zero position optical sensor always active /
E631 and E632: Sensor holder zero position optical sensor still
active after exiting from zero sensor /
E633: Sensor holder zero position optical sensor never active /
E634: Timeout on sensor holder movement /
E635: Sensor holder motor overrun
These errors are signals of a problem on the ceph sensor movement.
The position of the sensor movement is controlled by the optical sensor B6, that is
activated during the sensor holder axis reset; if this sensor is found active at the
start up phase, and it is never sensed de-activated, the errors E630 - E632 are
displayed, meaning that the sensor itself is broken or that the motor is not
running.
In case that it is never sensed activated, the errors E633 and E634 are displayed.
In all cases, the optical sensor functionality can be checked placing an opaque thin
material in the optical path and using a multimeter, verify that the voltage
between pin X95-3 and pin X95-5 on the Ceph driver board A13 is about 5V when
the optical path is covered by the thin material and about 0V when the optical
path is not covered.
Check the continuity of the cables up to the CCU with a multimeter. The path is as
follows:
B6->X95->A13->X89-pin5 / X58-pin5 ->CCU
Any interruption of this chain can therefore also lead to the A13 board
If there is no variation and the sensor holder does not move or moves with
difficulty or jumps:
a.
check the belt and verify that it is not broken; if the belt is loose, adjust
its tension
b.
check the 24V on the A13 board (led H2) if not present check the cables
X53-X87, X54-X88 and the fuse F1.
c.
check cable X92 of motor M9; there can be a short circuit or a broken
wire; check also for a loosen contact. In case of short circuit, replace the
cable, verifying also that no damage has been caused to the motor
driver on the A13 board.
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