Main Circuit Undervoltage (e05)

- Description: The main circuit DC voltage reached the undervoltage detection level (200 V DC) during Inverter operation.
- Probable Cause: Power supply to the Inverter has phase loss or the power cable is disconnected. Incorrect power supply voltage. Momentary power interruption has occurred. The internal circuitry of the Inverter is damaged.
+ Correction: Check the wiring and check for loose screws and disconnected wires and correct any problems. Make sure that the power supply voltage is within specifications. Use the momentary power interruption restart (Set P09 to 1 or 2). Improve the power supply. Replace the Inverter.

Radiation Fin Overheated (e06)

- Description: The temperature of the radiation fins of the Inverter has exceeded the specified temperature.
- Probable Cause: The ambient temperature is too high. The installation space is insufficient. The load is too large. The acceleration/deceleration time is too short. The ventilation is obstructed. The cooling fan of the Inverter does not work.
+ Correction: Ventilate the Inverter or install a cooling unit. Increase the space around the Inverter. Reduce the load. Increase the acceleration/deceleration time. Change the location of the Inverter to meet the installation conditions. Replace the cooling fan (Applies to Inverters with fans).

Cooling Fan Fault (e07)

- Description: The cooling fan has been locked (stopped) or the rotation speed is down by 30% or more.
- Probable Cause: The cooling fan wiring has a fault. The cooling fan is not in good condition. The cooling fan is faulty or beyond its service life.
+ Correction: Turn OFF the Inverter, remove the Inverter, and check and repair the wiring. Check and remove the foreign material or dust on the fan. Replace the fan.

Braking IGBT Fault (e08)

- Description: The brake IGBT is malfunctioning.
- Probable Cause: The IGBT is damaged.
+ Correction: Turn OFF the Inverter power immediately, and replace the Inverter.

Accumulated Time Alarm (e09)

- Description: The Inverter's accumulated time has reached the accumulated operating time standard (P02) that was set.
+ Correction: To cancel the alarm, set the accumulated operating time clear parameter (P21) to ini, or increase the existing accumulated operating time standard (P02).

Memory Fault (e01)

- Description: A fault was detected in the Inverter's internal memory.
- Probable Cause: Internal circuit fault.
+ Correction: If the fault persists even after the power has been turned OFF and back ON, then replace the Inverter.

EEPROM Write Error (t5t)

- Description: A power interruption occurred during an overload.
+ Correction: Turn the Inverter power OFF and back ON. (The immediately preceding accumulated operating time is not added.)

Power Supply Fault, Power Supply Undervoltage, Control Power Supply Fault, or Hardware Error (Not Lit)

- Description: No power supply is provided.
- Probable Cause: Check and correct the power supply wire and voltage. Terminal screws are loosened. The Inverter is damaged.
+ Correction: Check and tighten the terminal screws. Replace the Inverter.