Hitachi E9 fault code meaning
Hitachi / E9
Series: J100-E2
Under. V
AC drive
Meaning: Faulty power supply (undervoltage) | Decrease in voltage; faulty contact of MCB or Mg; repeated momentary power failure of 100 msec or less, 10 times or more in 10 minutes. | Evaluate power supply system; replace MCB or Mg.
Possible causes
Source: Hitachi J100-E2 Instruction Manual P10