Still FM-X EW Series, Original Instructions Manual, Page: 183 / 360

Operation
4
Auxiliary equipment
Possible cause Truck response Rectifying the error
Error number A3140
Incorrect measurements
caused by a reflective object
in the light signal path between
the sensor and reflector (foreign
signal)
Lifting functions can only
be operated in emergency
operation. See the following
section "Emergency operation
in the event of malfunctions in
the height measuring system".
● Check the light signal path
between the sensor and the
reflector. Remove obstacles.
Then fully lower the fork to
reference the system.
● If the error persists, contact
the authorised service centre.
Error number A3141
● Sensor failure, e.g. due to a
cable break or internal error
Lifting functions can only
be operated in emergency
operation. See the following
section "Emergency operation
in the event of malfunctions in
the height measuring system".
Contact your authorised
service centre.
Error number A3142
Sensor overheating
Lifting functions can only
be operated in emergency
operation. See the following
section "Emergency operation
in the event of malfunctions in
the height measuring system".
● Avoid strong sunlight and
proximity to other heat sources.
Allow the sensor to cool down.
● If the error persists, contact
the authorised service centre.
Error number A3143
● The reflector or sensor is very
dirty or fogged up
or
● Short interruption (min. 2
seconds) in the light signal, for
example, through packaging
material
Lifting functions can only
be operated in emergency
operation. See the following
section "Emergency operation
in the event of malfunctions in
the height measuring system".
● Error message received after
2 second interruption
● Lift height not displayed
● Lift height preselector not
available
● Clean the sensor glass
and the reflector. Observe
the information in the section
entitled "Cleaning the optical
height measuring system".
● Check the light signal path
between the sensor and the
reflector. Remove obstacles.
Then fully lower the fork to
reference the system.
● If the error persists, contact
the authorised service centre.
.
Emergency operation in the event of
malfunctions in the height measuring
system
In the event of a malfunction in the height mea-
surement, the truck switches to emergency
operation.
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