YASKAWA V1000

11 Troubleshooting
50 YASKAWA ELECTRIC TOBP C730600 60C V1000 Option SI-EN3/V Installation Manual
n Minor Faults and Alarms
Keypad Display Minor Fault Name
CALL
Serial communication transmission error
Communication is not established.
Cause Possible Solution
Minor Fault
(H2- = 10)
Communication wiring is
faulty.
• Check for wiring errors.
• Correct the wiring.
YES
An existing short circuit or
communications
disconnection
Check disconnected cables and short circuits and repair as needed.
Programming error on the
master side.
Check communications at start-up and correct programming errors.
Communication circuitry is
damaged.
• Perform a self-diagnostics check
• If the problem continues, replace either the control board or the
entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.
Termination resistor of the
MEMOBUS/Modbus
communications is not
enabled.
Set DIP switch S2 to the ON position to enable the termination
resistor on a drive located at the end of a network line.