1 Product details: (1) Part Number:MATRIX CLIMBMILL ECB 1000336916 (2) Parcel including: 1pcs* control board (3) Condition:new and test working before shipping (4) Warranty 30days 2 How to determine the failed controller: E01: communication failure, the individual is a sensor failure; E02: controller failure, we want to know which detector is broken, if E02 is best to first test the motor to see if there are any problems motor E03: Sensor fault; general treadmill will turn a few seconds later, there E03; E04: generally over-current fault, this situation is generally burned components on the controller; 3 Test motor before order Please make sure that there is no problem with the motor before you place your order.The motor can be tested by the method shown in the picture below. If the motor running smoothly by 5# battery, that means the motor is good. If running not smoothly or do not running, it means the motor broken.