The color of this light will show you the operational condition of the hot tub. Based on the color, you can tell at a glance whether your hot tub needs servicing or is performing adequately.
All is OK. No action required, everything is working exactly as designed.
There is a non-critical message on the topside panel indicating an item needs attention, such as changing the water, setting the time, etc.
Do not use. See the topside panel. Check for any freezing or flow obstruction(s). Call a technician at your earliest opportunity.
Do not use. Call a technician while at the topside panel and read the message to technician for guidance.