What to do if JetAir JET-3 does not start and HIM Displays 'FAULT '?
- BbriansummersJul 30, 2025
If the top line of the HIM displays 'FAULT ' when the JetAir Blower doesn't start, you should first try clearing the fault by pressing the STOP button. If that doesn't work, consult the Fault Condition Table in the AC DRIVE Users Manual to identify and resolve the root cause of the fault. Specific causes include undervoltage (which is normal during power down), overvoltage (potentially due to excessive regenerative power; check Para. 142 = 300), and HW Overcurrent (indicating the AC DRIVE is drawing too much current).

