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Trouble shooting and Solutions
Display
Fault Name
Possible Causes
Solutions
Err07 Overvoltage at
constant speed
1. The DC bus voltage is too high
☆
.
2. An external force drives the motor
during deceleration.
1. Replace with a proper braking
resistor.
2. Cancel the external force.
☆ : Voltage thresholds
Voltage Class
DC Bus Overvoltage
threshold
DC Bus Undervoltage
threshold
Braking operation
level
Three-phase 220 V
400V DC
200V DC
380V DC
Three-phase 380 V
810V DC
350V DC
750V DC
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 rectifier 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 load, or check 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
One drive
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.
