Inovance MD310 T5.5B - Symptoms and Diagnostic Guidance

4 Troubleshooting
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Display Fault Name Possible Causes Solutions
Err28 User-dened fault 2 1. The user-dened fault 2 signal is input via DI
2. The user-dened fault 2 signal is input via
VDI�
Reset the fault�
Err29 Accumulative power-
on time reached
The accumulative power-on time reaches the
setting of F8-16�
Clear the record by performing parameter
initialization (set FP-01 to 2)�
Err30 Off load fault Ofoad when it’s running. Check the connection between motor and load�
Err31 PID feedback lost
during running
The PID feedback is lower than FA-26� Check the PID feedback signal or set FA-26 to a
proper value�
Err33 Communication
receiving timeout
inside drive board
1� Wirings become loose inside the AC drive
2� The drive board is abnormal�
3� The control board is abnormal�
1� Connect all wirings securely�
2 and 3� Seek for maintenance�
Err40 Quick current limit 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�
Err41 Motor switchover fault
during running
The current motor is switched over via a
terminal during running of the AC drive�
Switch over the motor only after the AC drive
stops�
Err42 Overspeed error 1� Locked-rotor occurs on the motor�
2� F9-69 and F9-70 are set improperly�
3� Wirings between the AC drive and motor are
abnormal�
1� Check whether the machine is abnormal,
whether motor auto-tuning is not performed, and
whether the setting of F2-10 is small�
2� Set F9-69 and F9-70 properly�
3� Check whether wirings between the AC drive
and motor break� If yes, reconnect the wirings
securely�
Err96 Communication
receiving timeout
inside control board
1� Wirings become loose inside the AC drive
2� The drive board is abnormal�
3� The control board is abnormal�
1� Connect all wirings securely�
2 and 3� Seek for maintenance�