Fault Diagnosis and Solution MD320/MD320N User Manual
172
Da ta Ove rflow
If it is normal after replacing the
main control board
Main control board fault
As k for te chnica l support
Fig.8-20 Data overow (ERR21)
Yes
Yes
No
Inve rte r ha rdware fa ult
If it is ove r voltage
Re move ove r voltage fault
If it is ove r curre nt
Re move ove r curre nt fault
Fig.8-21 Inverter hardware fault(ERR22)
Fault of Short Circuit to Earth
De te ct if the moto r is s hort circuite d to e a rth
Replace the cable or motor
Re place the drive boa rd
Yes
Fig.8-22 Earth short circuit fault(ERR23)
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