Sigma SFG - Troubleshooting: Failures and Repairs; Extraordinary Servicing Procedures; Electrical Wiring Diagram

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10.5) POSSIBLE FAILURES AND REPAIRS
OPERATING FAULTS POSSIBLE CAUSES REPAIRS
The signal lamp does not light up
when you press the master circuit
breaker
1) The plug is not properly inserted
or its wires are disconnected.
2) The signal lamp on the on/off
button is fused
1) Check the
connection.
2) Replace the
lamp.
The machine does not start when
you press the control lever or the
pedal.
1) The protection grid is open
2) Belts are not in their proper
position.
3) Irregularity on safety
microswitches.
1) Rotate it and
close it.
2) Check if the
position is
correct.
3) Replace or control the
microswitches.
Light intermittent noise. 1) Lack of transmission chain
lubrication.
1) Grease chains.
Continuous noise. 1) Check efficient working of the
bearings.
1) Replace the
bearings.
10.6 EXTRAORDINARY SERVICING:
Please refer to SIGMA Srl authorised personnel to carry out
actions that are not specifically mentioned in this manual.
Refer to our servicing department to work at the place or to
service it at our premises to replace the motor, the drive,
electronic cards and important mechanical parts or following
machine falls.
10.7 WIRING DIAGRAM
A