Dirty filters can cause safety switches to turn off specific components to prevent damage. Removing the filters and cleaning them can sometimes fix this issue. While the filters are out, reset the power to the tub. If no “FLO” error is present or if the heating indicator comes on then the issue was caused by dirty filters. If the problem still exists with the filters out then you would want to call and schedule service.
From time to time, your swimming pool water will develop organic contaminants brought in by people using your pool or by the environment. Whe you “Shock” your swimming pool water you are chemically destroying the organic contaminants and restoring water clarity which will help maintain water balance and reduce or eliminate eye and nose irritation.