Inovance MD330H User Manual

Maintenance and
Troubleshooting MD380 User Manual
- 292 -
Fault Name Display Possible Causes Solutions
Pulse-by-pulse
current limit fault
Err40
1: The load is too heavy or locked-
rotor occurs on the motor.
2: The AC drive model is of too
small power class.
1: Reduce the load and
check the motor and
mechanical condition.
2: Select an AC drive of
higher power class.
Motor switchover
fault during
running
Err41
Change the selection of the motor
via terminal during running of the
AC drive.
Perform motor switchover
after the AC drive stops.
Too large speed
deviation
Err42
1: The encoder parameters are set
incorrectly.
2: The motor auto-tuning is not
performed.
3: F9-69 and F9-70 are set
incorrectly.
1: Set the encoder
parameters properly.
2: Perform the motor auto-
tuning.
3: Set F9-69 and F9-70
correctly based on the actual
situation.
Motor over-speed Err43
1: The encoder parameters are set
incorrectly.
2: The motor auto-tuning is not
performed.3: F9-69 and F9-70 are
set incorrectly.
1: Set the encoder
parameters properly.
2: Perform the motor auto-
tuning.
3: Set F9-69 and F9-70
correctly based on the actual
situation.
Motor overheat Err45
1: The cabling of the temperature
sensor becomes loose.
2: The motor temperature is too high.
1: Check the temperature
sensor cabling and eliminate
the cabling fault.
2: Lower the carrier
frequency or adopt other
heat radiation measures.
Initial position
fault
Err51
The motor parameters are not set
based on the actual situation.
Check that the motor
parameters are set correctly
and whether the setting of
rated current is too small.
9.4 Common Faults and Solutions
You may come across the following faults during the use of the AC drive. Refer to the
following table for simple fault analysis.

Inovance MD330H Specifications

General

Brand	Inovance
Model	MD330H
Category	DC Drives
Language	English