YASKAWA Varispeed-606PC3 Instruction Manual

1 . VS-606PC3 INVERTER MAIN UNIT (Cont'd)* LED display C : blink " light off* For OL3 (overtorque detection), fault display or alarm display can be selected accordingto the constant (No 40) setting. For details, refer to "OVERTORQUE DETECTIONFUNCTION" on page 124Alarm DisplayDigital Inverter LED Display* Contents Possible Cause/Operator Corrective ActionsDS 1(GR) DS2 (RD)UV (Main Main circuit DC voltage Check the power supplyCircuitUnder- is reduced less than voltage, main circuit4111111 C power supply wiringvoltage) lax detection level when connection or terminalblinks . inverter is not outputting . screw tightening.OL3 Check the machine using(Overtorque Motor current exceeding status and remove theDetection) fi ,,, the set value flows dUE' cause of the fault.3blinks. O 41) to machine fault or Or increase the set value/ 1 % overload. Inverter [constant (No 41)] upcontinues operation. to the machine allowablevalue0 V Main circuit DC voltage(MainCircuit Over C is more than over-voltage detection level Check the power supplyvoltage) when inverter is not voltage .oru blinks . outputting .OH(Cooling Fin ~ Intake temperature Check the intake airOverheat) /1\when s temperature.oH blinks . not outputting