Yaskawa BACnet MS/TP SI-B3/V - Manual (Page 33)

n Minor Faults and Alarms
Digital Operator Display Minor Fault Name
CALL
Serial Communication Transmission Error
Communication has not yet been established.
Cause Possible Solutions
Minor Fault
(H2-oo = 10)
Communications wiring is faulty,
there is a short circuit, the wiring
is incorrect, or the connections are
poor.
• Check for wiring errors.
• Correct the wiring.
• Check for disconnected cables and short circuits. Repair as
needed.
YES
Programming error on the master
side.
Check communications at start-up and correct programming
errors.
Communications circuitry is
damaged.
• Perform a self-diagnostics check.
• If the problem continues, replace the control board or the
entire drive. Contact Yaskawa for instructions on replacing
the control board.
7 Troubleshooting
YASKAWA TOEP YAICOM 19A V1000 Option BACnet MS/TP SI-B3/V Installation & Technical Manual 33