Input/Output terminal status Input Terminal Status 1: Terminal S1 is “closed” 1: Terminal S2 is “closed” 1: Terminal S3 is “closed” 1: Terminal S4 is “closed” 1: Terminal S5 is “closed” Not Used Output Terminal Status 1: Terminal MA-MC is “closed” Not Used 7. Faults and Alarms *1 Refer to user’s manual for full fault code listings Fault Display Fault name and meaning Possible cause and remedy OC Overcurrent Output current is higher than 250% of inverter rated current. Check output for short circuit or ground fault. The Load is too large, reduce it ore use larger Inverter. Check motor FLA rating compared to inverter and V/F setting. OV Overvoltage DC bus voltage has exceeded detection level.
Load inertia is too large and the motor is regenerating. Increase deceleration time (n020 or n022). Connect an external braking resistor and set n092 to 1. Check braking resistor and wiring. uV1 Main circuit undervoltage DC bus voltage is below detection level. Check mains power supply voltage and connections. Check correct supply for Inverter being used. Monitor for mains dips or interruptions. OH Unit overheated Temperature inside the inverter has exceeded 110°C. Refer to manual for installation guidelines and recommendations. Check cooling fan (if fitted). Check V/F characteristic ore reduce Carrier frequency.
OL1 Motor overload The inverter is protecting the motor from overload based on an internal IT calculation using n036 setting. Check and reduce the load. Check V/F characteristic (Vmax and Fmax). Increase the running speed of the motor. Increase acceleration/decelleration times. EF*1 External fault An external fault has been input. Check your control terminal wiring. A multi-functional digital input has been set to 3 or 4. Run signal must be removed before this can be reset. SER (flashing) Sequence error Sequence input when inverter running. Inverter must be stopped when Local/Remote switching attempted.
Inverter must be stopped when Comms/Remote switching attempted bb (flashing) External baseblock An external baseblock command has been input. Check your control terminal wiring. A multi-functional digital input has been set to 12 or 13. EF (flashing) Sequence error has occured Forward and reverse run signal have been applied simultaneously.