EM11 User’s Manual
7. Fault Diagnosis and Solution
129
Fault Name
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-01 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-01 correctly.
2: Reduce the load and check the
motor and the mechanical
condition.
3: Select a frequency inverter of
higher power class.
7. Fault Diagnosis and Solution
EM11 User’s Manual
130
Fault Name
Display
Possible Causes
Solutions
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.
Power output
phase loss
Err13
1: The cable connecting the frequency
inverter and the motor is faulty.
2: The frequency inverter's three-phase
outputs are unbalanced when the motor is
running.
3: The drive board is faulty.
4: The IGBT module is faulty.
1: Eliminate external faults.
2: Check whether the motor three
phase winding is normal.
3: Ask for technical support.
4: Ask for technical support.
IGBT Module
overheat
Err14
1: The ambient temperature is too high.
2: The air filter is blocked.
3: The fan is damaged.
4: The thermally sensitive resistor of the
IGBT module is damaged.
5: The inverter IGBT module is
damaged.
1: Lower the ambient temperature.
2: Clean the air filter.
3: Replace the damaged fan.
4: Replace the damaged thermally
sensitive resistor.
5: Replace the inverter module.
External
equipment
fault
Err15
1: External fault signal is input via DI.
2: External fault signal is input via virtual
I/O.
1: Reset the operation.
2: Reset the operation.
Communicati
on fault
Err16
1: The host computer is in abnormal
state.
2: The communication cable is faulty.
3: The communication extension card is
set improperly.
4: The communication parameters in
group bA are set improperly.
1: Check the cabling of host
computer.
2: Check the communication
cabling.
3: Set the communication
extension card correctly.
4: Set the communication
parameters properly.
Contactor
fault
Err17
1: The drive board and power supply are
faulty.
2: The contactor is faulty.
1: Replace the faulty drive board
or power supply board.
2: Replace the faulty contactor.
Current
detection fault
Err18
1: The HALL device is faulty.
2: The drive board is faulty.
1: Replace the faulty HALL
device.
2: Replace the faulty drive board.
Motor
auto-tuning
fault
Err19
1: The motor parameters are not set
according to the nameplate.
2: The motor auto-tuning times out.
1: Set the motor parameters
according to the nameplate
properly.
2: Check the cable connecting the
Frequency inverter and the motor.
Encoder fault
Err20
1: The encoder type is incorrect.
2: The cable connection of the encoder is
incorrect.
3: The encoder is damaged.
4: The PG card is faulty.
1: Set the encoder type correctly
based on the actual situation.
2: Eliminate external faults.
3: Replace the damaged encoder.
4: Replace the faulty PG card.
EEPROM
read- write
fault
Err21
The EEPROM chip is damaged.
Replace the main control board.
