Overcurrent during stop
Olası Nedenler
- Output short circuit; motor wiring fault
Çözüm
- Inspect U/V/W cables; test motor insulation; check for shorts
Overload (electronic thermal)
Olası Nedenler
- Motor current exceeds OL setting; duty cycle too heavy
Çözüm
- Reduce load; adjust motor rated current (b012); check b013 (thermal class)
Braking resistor overload
Olası Nedenler
- Brake resistor duty cycle exceeded; resistor too small
Çözüm
- Increase resistor wattage; reduce braking frequency; increase deceleration time
DC bus overvoltage
Olası Nedenler
- Deceleration too fast; supply voltage too high; no brake resistor
Çözüm
- Increase deceleration time; check supply voltage; add/enable brake resistor
EEPROM write error
Olası Nedenler
- Power cut during parameter save
Çözüm
- Cycle power; if persistent, replace drive control board
Under-voltage (UV)
Olası Nedenler
- Supply voltage drop; phase loss; input fuse blown
Çözüm
- Check 3-phase supply; replace fuse; add line reactor
Drive overtemperature
Olası Nedenler
- Fan failed; ambient too high; filter blocked
Çözüm
- Clean filter; check fan operation; reduce load
CPU error
Çözüm
- Cycle power; update firmware; replace drive if persistent
Ground fault
Olası Nedenler
- Motor or cable leakage current too high
Çözüm
- Test motor with megger; check cable for damage; add output reactor
Output phase loss
Olası Nedenler
- One motor phase disconnected
Çözüm
- Check U/V/W motor cable; test motor winding resistance
RS485 Modbus communication error
Olası Nedenler
- Communication cable fault; wrong address or baud rate; timeout
Çözüm
- Check RS485 wiring; verify C071 (baud rate) and C072 (address); check timeout C076
Thermistor fault (motor PTC)
Olası Nedenler
- PTC sensor open circuit or short; wrong PTC type
Çözüm
- Check PTC wiring at C085 terminal; verify thermistor type setting; replace PTC if failed
Keypad disconnected fault
Olası Nedenler
- Remote keypad cable disconnected during operation when set as control source
Çözüm
- Check keypad cable; change control source to terminals (C001) if keypad not used
Operator disconnect fault
Olası Nedenler
- Same as E40 but for operator panel
Çözüm
- Reconnect operator; change to terminal control mode
Parameter setting error
Olası Nedenler
- Parameter value out of valid range
Çözüm
- Check parameter against manual; restore defaults with b084=00 then re-enter
Regenerative resistor overtemperature
Olası Nedenler
- External resistor thermal switch tripped; resistor undersized
Çözüm
- Allow cooling; check resistor thermal switch wiring; replace with larger resistor
Parameter checksum error
Olası Nedenler
- EEPROM parameter data corrupted; power lost during write
Çözüm
- Restore factory defaults (Fn005); re-enter parameters; replace servo if persistent
Overcurrent fault
Olası Nedenler
- Motor winding short; cable fault; aggressive acceleration; drive undersized
Çözüm
- Megger test motor; check cables; extend acceleration ramp; check current limit
Regenerative energy excess
Olası Nedenler
- Deceleration too fast; brake resistor missing or too small
Çözüm
- Connect appropriately sized regenerative resistor; increase deceleration time
Encoder communication fault (serial absolute encoder)
Olası Nedenler
- Encoder cable broken; connector unseated; encoder internal failure
Çözüm
- Check encoder cable (shielded); check connector; replace encoder unit