I have lost my instruction manual and the last triangle light is on what does it mean and how do i fix

Descaling the Palazzo: The Palazzo is programmed to descale the boilers on its own, when set in the correct mode. You program the machine to descale it’s self, do the following. With the machine turned on, push and hold the left 2 buttons (clean and pre-ground). This should light the top right red indicator light. Mix your descaling crystals in a glass of warm water then add to 32 to 48 oz in your water tank. Next, have a container that can handle about 2 quarts of water under the steam wand, or have the machine positioned next to a sink. Next open the steam knob on the right side of the machine. You should hear the pump turn on and pump about 2 to 3 oz’s. of water through the wand into the container. The pump should turn off and there will be a wait of about 2 minutes. The pump should turn on again and more water will come out. It will do this until it has completely drained the water tank. Do not interrupt this cycle until the machine has stopped on its own. When it does stop, all lights on the bottom will flash. Rinse out the water tank and refill with fresh water. Place the water tank on the machine again, and then close, and then open the steam knob again and let the water just flow through the boilers until it is emptied by the machine. Don’t turn off anything until the machine stops on its own. This will clear the descale light. Refill the water tank again with fresh water, open the knob on the right again to prime and when the red light goes out, your ready to go.