Inovance F66 fault code meaning

Series: HD5X

Unit overvoltage fault

AC drive

Meaning: Unit DC bus voltage exceeds the hardware overvoltage threshold

Possible causes

• 1.Mains voltage high
• 2. F2-12 (braking torque output upper limit) setting too high
• 3.Load inertia high and deceleration time (F0-18) setting too low
• 4.Overvoltage suppression function not enabled
• 5.Unit control board error
• 6.Output current oscillation
• 7.Input transformer fault

Source: HD5X Series High-Voltage AC Drive User Manual P121

Series: HD90P, HD90T, HD9X, HD9XS

Unit overvoltage fault

AC drive

Meaning:

Possible causes

Source: HD90P Series High-Voltage Variable-Frequency Power Supply User Manual P116; HD90T Series High-Voltage AC Drive User Manual P154; HD9X High-Voltage AC Drive User Manual P170; HD9XS Series High-Voltage AC Drive User Manual (Neutral) P188