1. UV1 Fault

This is described as an Undervoltage Fault. It may occur during a power outage.

This fault can display on the basic HMI under 1 of 2 conditions:

1. And actual undervoltage condition on the supply (L1-L3) side of the circuit or;
2. A break in communication between the drive and the HMI.

Note:

Ensure the fan is off at the controller.

Assuming power has been verified at the receptacle, and that you have tested your cat5e with a serviceable cat5e tester (see Cat5e Basics), communication can sometimes be restored by cycling power to components in the following order:

Make sure the fan is off at the controller before doing this.

1. Ensure power icon for fans are selected to off and no speed is commanded
2. Remove power from the HMI and leave it unplugged.
3. Open the power breaker to the drive, and leave power disconnected for approximately 5 minutes so that capacitors can drain power completely.
4. Restore power to the drive and allow approximately 5 minutes before restoring power to HMI.
5. Once power is restored to HMI, be patient while HMI relocates fan option cards in the circuit. The more fans, the longer this will take. Also, refreshing the screen by paging back and for the between the home screen and the fan screen may be necessary to update status of the fan.