4 Troubleshooting
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Display Fault Name Possible Causes Solutions
Err08 Control power fault The input voltage exceeds the allowed range� Adjust the input voltage to within the allowed
range�
Err09 Undervoltage 1� Instantaneous power failure occurs�
2� The input voltage exceeds the allowed range
3� The DC bus voltage is too low�
4. The rectier bridge and buffer resistor are
faulty�
5� The drive board is faulty�
6� The control board is faulty�
1: Reset the fault�
2: Adjust the input voltage to within the allowed
range�
3 to 6: Seek for maintenance�
Err10 Drive overload 1� The load is too heavy or the rotor is locked�
2� The drive is of too small power class�
1: Reduce the load, or check the motor, or check
the machine whether it is locking the rotor�
2: Select a drive of higher power class�
Err11 Motor overload 1� F9-01 is too small�
2� The load is too heavy or the rotor is locked�
3� The drive is of too small power class�
1: Set F9-01 correctly�
2: Reduce the load, or check the motor, or check
the machine whether it is locking the rotor�
3: Select a drive of larger power class�
Err12 Power input phase
loss
1� The three-phase power supply is abnormal�
2� The drive board is faulty�
3� The lightening protection board is faulty�
4� The control board is faulty�
1: Check the power supply�
2 to 4: Seek for maintenance�
Err13 Power output phase
loss
1� The cable between drive and motor is faulty�
2� The drive's three-phase output is unbalanced
when the motor is running�
3� The drive board is faulty
4� The IGBT is faulty�
1: Check the cable�
2: Check the motor windings�
3 to 4: Seek for maintenance�
Err14 IGBT overheat 1� The ambient temperature is too high�
2. The air lter is blocked.
3� The cooling fan is damaged�
4� The thermal sensor of IGBT is damaged�
5�The IGBT is damaged�
1: Reduce the ambient temperature�
2: Clean the air lter.
3 to 5: Seek for maintenance�
Err15 External equipment
fault
1� External fault signal is input via DI�
2� External fault signal is input via VDI�
Reset the fault�
Err16 Communication fault 1� The host computer is abnormal�
2� The communication cable is faulty�
3� The extension card type set in F0-28 is
incorrect�
4� The communication parameters in group FD
are set improperly�
1: Check cabling of the host computer�
2: Check the communication cabling�
3: Set F0-28 correctly�
3: Set the communication parameters properly�
Err18 Current detection
fault
The drive board is faulty� Replace the drive board�
Err19 Motor tuning fault 1� Motor parameters are wrong�
2� Motor tuning overtime�
1� Check motor parameters F1-00 to F1-05�
2� Check the wiring between drive and motor�
Err21 EEPROM read-write
fault
The EEPROM chip is damaged� Replace the main control board�
Err23 Short circuit to ground The motor is short-circuited to ground� Replace the cables or motor�
Err26 Accumulative running
time reached
The accumulative running time reaches the
setting of F8-17�
Clear the record by performing parameter
initialization (set FP-01 to 2)�
Err27 User-dened fault 1 1. The user-dened fault 1 signal is input via DI.
2. User-dened fault 1 signal is input via VDI.
Reset the fault�
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