Troubleshooting Checkpoints - Yamaha RCX40 User Manual

2.3

Troubleshooting checkpoints

1. Installation and power supply
Symptom
1 Controller won't turn on
even with power supplied.
2 Controller turns on but no
MPB display.
3 Controller turns on but
"ERR" LED on front panel
lights up.
Possible cause
• Power is not supplied. • Check power input terminal
connection (L/N/GND).
• Check power input terminal
voltage (L/N/GND).
• Check if "PWR" LED on front
panel is lit.
• Problem in controller
internal power.
• MPB not connected. • Check MPB connector.
• Wrong MPB connection. • Check how MPB connector is
• MPB malfunctioning. inserted.
• Problem in controller • Replace MPB and check
internal power supply. operation.
• Now in emergency stop. • Connect the MPB and check
the error history.
• Check DI00 on MPB screen.
• Error of error group No. • Connect the MPB and check
17 occurred. the error history.
• Error of error group No. • Connect the MPB and check
21, 22 occurred. the error history.
2. Troubleshooting
Check items Corrective action
• Connect power input terminal
correctly.
• Supply rated power supply
voltage.
• Replace the controller.
• Plug in MPB connector
correctly.
• Replace the MPB.
• Replace the controller.
• Release MPB emergency stop
switch.
• Insert MPB connector.
• Connect the emergency stop
terminal of SAFETY
connector.
• Check the axis from the error
information.
• Check the cause from the
error information.
• Eliminate the cause of the
error.
• Check the cause from the
error information.
• Eliminate the cause of the
error.
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