219
Fault code Fault type Possible fault cause Solutions
The motor operates at low frequency
and large load for a long time.
Add a large fan for the motor to dissipate heat
Er.AIF
Abnormal AI
analog input
Abnormal control circuit Seek for service support
The input analog is out of the range and
the absolute value is greater than 11V
Check the analog input
Er.THI
Inverter
module
temperature
sampling
disconnection
Abnormal temperature sampling circuit Seek for service support
The inverter module temperature
sampling wire is poorly connected.
Check the inverter module temperature
sampling wire connection
Er.THr
Rectifier
module
temperature
sampling
disconnection
Abnormal temperature sampling circuit Seek for service support
The temperature sampling wire is poorly
connected.
Check the temperature sampling wire connection
Er.10v
Control board
±10V power
short circuit
±10Vgrounding Confirm whether the ±10V wiring is correct
The interface board circuit is damaged.
Replace the interface board, seek for service
support
Er.rEF
Abnormal
internal
over-current
reference
The control board circuit is damaged. Seek for service support
Er.PIL
Wrong PID
limit value
setting
The PID lower limit set value exceeds
PID upper limit set value
Adjust the PID upper / lower limit set value
All the possible alarm types for MV300 are summarized as shown in table 7-2. For details, please refer to the
group P97 function code setting. If the fault disappears automatically during the running process, the drive will
also automatically reset to the status before the alarm (except AL.SC1, for details, please refer to the group
P97 function code description).
Table 7-2 Alarm code table
Alarm
code
Alarm type Possible alarm causes Solutions
AL.oL1 Drive overload
The motor parameters are incorrect. Perform the parameter auto-tuning of the motor
The load is too large. Adopt the drive with higher power
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