7. Fault Diagnosis and Solution
EM12 User’s Manual
116
Fault Type
Display
Possible Causes
Solutions
Over current
at constant
speed
Err04
1: The output circuit is grounded or short
circuited.
2: Motor auto-tuning is not performed.
3: The voltage is too low.
4: A sudden load is added during
operation.
5: The frequency inverter model is of too
small power class.
1: Eliminate external faults.
2: Perform the motor auto-tuning.
3: Adjust the voltage to normal range.
4: Remove the added load.
5: Select an Frequency inverter of higher
power class.
Overvoltage
during
acceleration
Err05
1: The input voltage is too high.
2: An external force drives the motor
during acceleration.
3: The acceleration time is too short.
4: The braking unit and braking resistor
are not installed.
1: Adjust the voltage to normal range.
2: Cancel the external force or install a
braking resistor.
3: Increase the acceleration time.
4: Install the braking unit and braking
resistor.
Overvoltage
during
deceleration
Err06
1: The input voltage is too high.
2: An external force drives the motor
during deceleration.
3: The deceleration time is too short.
4: The braking unit and braking resistor
are not installed.
1: Adjust the voltage to normal range.
2: Cancel the external force or install the
braking resistor.
3: Increase the deceleration time.
4: Install the braking unit and braking
resistor.
Overvoltage
at constant
speed
Err07
1: The input voltage is too high.
2: An external force drives the motor
during deceleration.
1: Adjust the voltage to normal range.
2: Cancel the external force or install the
braking resistor.
Control power
supply fault
Err08
The input voltage is not within the
allowable range.
Adjust the input voltage to the allowable
range.
Low voltage
Err09
1: Instantaneous power failure occurs on
the input power supply.
2: The frequency inverter's input voltage
is not within the allowable range.
3: The DC bus voltage is abnormal.
4: The rectifier bridge and buffer resistor
are faulty.
5: The drive board is faulty.
6: The main control board is faulty.
1: Reset the fault.
2: Adjust the voltage to normal range.
3: Ask for technical support
4: Ask for technical support
5: Ask for technical support
6: Ask for technical support
Frequency
inverter
overload
Err10
1: The load is too heavy or locked- rotor
occurs on the motor.
2: The frequency inverter model is of too
small power class.
1: Reduce the load and check the motor
and mechanical condition.
2: Select a frequency inverter of higher
power class.
Motor
overload
Err11
1: bb-02 is set improperly.
2: The load is too heavy or locked- rotor
occurs on the motor.
3: The frequency inverter model is of too
small power class.
1: Set bb-02 correctly.
2: Reduce the load and check the motor
and the mechanical condition.
3: Select a frequency inverter of higher
power class.
Power input
phase loss
Err12
1: The three-phase power input is
abnormal.
2: The drive board is faulty.
3: The lightningproof board is faulty.
4: The main control board is faulty.
1: Eliminate external faults.
2: Ask for technical support.
3: Ask for technical support.
4: Ask for technical support.
Summary of Contents for EM12 Series
Page 5: ......
