MD280/MD280N User Manual Fault Diagnosis and Countermeasures
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Err12
Check if three phase input
power supply is normal
Check if the drive board is normal
If the main control board is normal
Check and resolve the
problems in the external
lines to ensure that the
three phase power input to
the inverter is normal
Replace the drive
board
Replace the main
control board
Ask for technical
support
Phase loss at the
input side
Yes
Yes
No
No
No
Fig.8-10 Phase failure at input side (ERR12)
Fig.8-11 Phase failure at output side (ERR13)
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