Single-control UP pool (water storage) :A(red)- water level control point. When water level gets to A point,the probe Contact water and controller can stop the pump by auto.B(blue)-Lower water level control point. When water level gets off B point,the probe out of reach water and controller can start the pump by auto.C(black)-Should be placed in bottom of pool as the common line.D(green) and E(yellow)are connected with C (black). Single-control DOWN pool(drain water):E- water level control point. When water level gets to E point,the probe Contact water and controller can start the pump by auto.D-Lower water level control point. As liquid level gets off D point,the probe out of reach water and controller can stop the pump by auto.C-Should be placed in bottom of pool as the common line.A and B-disconnected of water protection:C and D-Lower water level control points. When water level gets off this point,C or D probe out of reach water and controller can stop the pump by auto.E and C-short-connected;A and B-disconnected Joint control UP and DOWN pool installation instructions :A- water level control point in UP pool. When water level gets to A point,the probe Contact water and controller can stop the pump by auto.B-Lower water level control point in UP pool. When water level gets off A point, the probe out of reach water and controller can start the pump by auto. C-Should be placed in bottom of UP and DOWN pools as the common line.D-Lower water level control point in DOWN pool. When water level gets off D point, the probe out of reach and controller can stop the pump by auto.E- water level control point in DOWN pool. When water level gets to E point, the probe reach water and controller can start the pump by auto. Then pool starts to drain water. If not, E point disconnected Type:DF-96D Updated version Working voltage : AC 220V/50HZ Max Current :10A(Use the 30A Delay) Installation:Din Rail Mount Power consumption less than 2W transmission signal:500M Used to solve problem: 1. On power no work: a. Check the red indicator is on or not. If not, make the connection is good enough; 2. When water level is above or probes the pump does not start or stop by auto, check it like the following. a. Whether the probe is placed too high or low so that water level can reach or out of reach it; b. The connection of &lower line or probe is dislocation by error or short connected; c. To check the probe whether it is rust or not or the connection is good enough. d. C- Check the common line whether it is placed in the lowermost bottom of pool. colour:creamy-white Material:plastic size:100*50*75mm Package Contents: 1 * Level Controller Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.