Ideally, this indicator should be off. If on, it indicates a fault of the motor. If the product is still under warranty, you should make a claim at the seller. Otherwise request a replacement control station (motor base).
O3 GENERATOR indicator on the ozone & saltwater system
The O3 GENERATOR indicator on the solinator should not be lit. If it is lit, it indicates a motor malfunction that requires a warranty claim or control station replacement.