6.5 Alarm Detection 130 SIEP C710606 33A OYMC AC Drive – J1000 User Manual LED Operator Display Minor Fault Name EF1 External fault (input terminal S1) External fault at multi-function input terminal S1. EF2 External fault (input terminal S2) External fault at multi-function input terminal S2. EF3 External fault (input terminal S3) External fault at multi-function input terminal S3. EF4 External fault (input terminal S4) External fault at multi-function input terminal S4. EF5 External fault (input terminal S5) External fault at multi-function input terminal S5. Cause Possible Solutions Minor Fault Output (H2-01 = 10) An external device has tripped an alarm function.
Remove the cause of the external fault and reset the multi-function input value. YES Wiring is incorrect. • Ensure the signal lines have been connected properly to the terminals assigned for external fault detection (H1- = 20 to 2F). • Reconnect the signal line. YES Multi-function contact inputs are set incorrectly. • Check if the unused terminals have been set for H1- = 20 to 2F (External Fault). • Change the terminal settings. YES LED Operator Display Minor Fault Name oH Heatsink Overheat The temperature exceeded 90-100 °C Cause Possible Solutions Minor Fault Output (H2-01 = 10) Surrounding temperature is too high • Check the surrounding temperature.
• Improve the air circulation within the enclosure panel. • Install a fan or air conditioner to cool surrounding area. • Remove anything near drive that may cause extra heat. YES Internal cooling fan has stopped. • Replace the cooling fan. Refer to Cooling Fan Replacement on page 145. • After replacing the drive, reset the cooling fan maintenance parameter to (o4-03 = “0”). YES Airflow around the drive is restricted. • Provide proper installation space around the drive as indicated in the manual. Refer to Correct Installation Orientation on page 27. • Allow for the specified space and ensure that there is sufficient circulation around the control panel.
YES • Check for dust or foreign materials clogging cooling fan. • Clear debris caught in the fan that restricts air circulation. YES LED Operator Display Minor Fault Name oL3 Overtorque 1 Drive output current was greater than L6-02 for longer than the time set in L6-03. Cause Possible Solutions Minor Fault Output (H2-01 = 10) Inappropriate parameter settings. Check parameters L6-02 and L6-03. YES There is a fault on the machine side (e.g., the machine is locked up). • Check the status of the machine. • Remove the cause of the fault. YES LED Operator Display Minor Fault Name ov DC Bus Overvoltage The DC bus voltage exceeded the trip point. For 200 V class: approximately 410 V For 400 V class:
approximately 820 V (740 V when E1-01 Cause Possible Solutions Minor Fault Output (H2-01 = 10) Surge voltage present in the drive input power. • Install a DC reactor or an AC reactor. • Voltage surge can result from a thyristor convertor and a phase advancing capacitor operating on the same drive input power system. YES • The motor is short-circuited. • Ground current has over-charged the main circuit capacitors via the drive input power. • Check the motor power cable, relay terminals and motor terminal box for short circuits. • Correct grounding shorts and turn the power back on. YES Noise interference causes the drive to operate incorrectly.
• Review possible solutions for handling noise interference. • Review section on handling noise interference and check control circuit lines, main circuit lines and ground wiring. • If the magnetic contactor is identified as a source of noise, install a surge protector to the MC coil. YES Set number of fault restarts (L5-01) to a value other than 0. YES LED Operator Display Minor Fault Name PASS MEMOBUS/Modbus Communication Test Mode Complete