A, first check your wiring method is correct, carefully read the prospectus and down the pool wiring methods;

 B, if it is determined no connection problem, please use the following simple method to detect whether there are quality control issues;
 ▲ first remove the pool three signal lines, then three short copper;
 ▲ start: on the air switch, the controller at the bottom of the switch to ON, this time the pump is running, and then connect the three short copper terminals of the high school pool of low water shorted twisted together, the pump is stopped; then separate the three wires, water pump began to run. You can repeat this operation. this is switched on or off will delay 3-5 seconds, the controller delay is to make contact with more fully, to avoid malfunction.

 C, to determine:
 ▲ If these actions have a problem, then the controller itself has quality problems, please contact your dealer for replacement or repair;
 ▲ If that is no problem, you can be sure the problem is to install either the signal line question: for example, the signal line is damaged, or mouse biting, or it could be the signal line probe needs to be cleaned, when the signal line extension connector contacts are not good.