STEP EXCITE: Service & maintenance manual - rev. 1.4
Page 6.27
6.12.2. HAND SENSOR
The machine displays this error if the HS interface board is not working, or if it is not supplied by
the display board.
For an easier and quicker diagnosis of the problem, we recommend to use the
functions of Test Box Excite.
THERE IS NO HR
SIGNAL
Are the sensors correctly
connected to the HS interface
board?
Is the supply v oltage correct at
the output of the display board?
Reinstate the connection
Replace cable CBQ-25-1
Replace the display board
2
4
YES
NO
YES
NO
Is the supply v oltage correct at
the input to the HS interface
board?
Replace the HS interf ace
board
3
YES
NO
Check the earth connection
of the machine
1
Follow the procedure step by step to correctly diagnose the problem. Take particular care with the
checks highlighted by circled numbers, which are described in detail below:
(1) Check the earthing of the machine using a tester to measure the resistance between the ground
pin on the power supply cable and the ground node to which the receiver is connected inside
the display. The value must be less than 1 Ohm.
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