5 Installation Procedure10 YASKAWA SIEP C730600 86F MECHATROLINK-II Technical Manual◆ MECHATROLINK-II Option LED DisplayOption has four LEDs that identify the option card or communication status.■ Defining Option LED StatesA - 1000-Series Label B - GA500, GA700, GA800, CR700,and CH700 LabelFigure 4.2 Option LED LabelsTable 4.2 MECHATROLINK-II Operation LED StatusLED State Status DescriptionRUNON Power supply on • The SI-T3 has power and is prepared for operation • An internal, self-diagnostic checkcompleted in the SI-T3OFFPower supply off • The drive has no power• The SI-T3 is not properly connected to the drive, or the SI-T3 has no power• An internal, self-diagnostic check completed in the SI-T3ERRON Connection Error • The SI-T3 is not properly connected to the drive• Communication error *1Flashing SI-T3 error Error found during the SI-T3 self-diagnostic checkOFF Normal operation • The SI-T3 is properly connected to the drive• Communication normalTXON Sending data Data is being sent (LED may appear to be flashing)OFF Not sending data • No data being sent• During resetRXON Receiving data Data is being sent (LED may appear to be flashing)OFF Not receiving data • No data being received• During reset*1 For more information about the communication error, refer to Troubleshooting on page 37.5 Installation Procedure◆ Section SafetyDANGER Electrical Shock Hazard. Do not examine, connect, or disconnect wiring on an energized drive. Beforeservicing, disconnect all power to the equipment and wait for the time specified on the warning label at a minimum. The internalcapacitor stays charged after the drive is de-energized. The charge indicator LED extinguishes when the DC bus voltagedecreases below 50 Vdc. When all indicators are OFF, measure for dangerous voltages to make sure that the drive is safe. Ifyou do work on the drive when it is energized, it will cause serious injury or death from electrical shock.WARNING Electrical Shock Hazard. Do not operate the drive when covers are missing. Replace covers and shieldsbefore you operate the drive. Use the drive only as specified by the instructions. Some figures in this section include driveswithout covers or safety shields to more clearly show the inside of the drive. If covers or safety shields are missing from thedrive, it can cause serious injury or death.WARNING Electrical Shock Hazard. Only let approved personnel install, wire, maintain, examine, replace parts, andrepair the drive. If personnel are not approved, it can cause serious injury or death.WARNING Electrical Shock Hazard. Do not remove covers or touch circuit boards while the drive is energized. If youtouch the internal components of an energized drive, it can cause serious injury or death.WARNING Electrical Shock Hazard. Do not use damaged wires, put too much force on the wiring, or cause damage tothe wire insulation. Damaged wires can cause serious injury or death.WARNING Fire Hazard. Tighten all terminal screws to the correct tightening torque. Connections that are too loose or tootight can cause incorrect operation and damage to the drive. Incorrect connections can also cause death or serious injury fromfire.NOTICE Observe correct electrostatic discharge (ESD) procedures when touching the option. Failure to obey cancause ESD damage to the option circuitry.