The following instructions emphasize electrical safety and power disconnection.
External phenomenon: After connecting the treadmill to the power supply and turning on the power switch, the electronic display does not show anything, and pressing any key has no effect. Simultaneously, the circuit breaker in the user's home may trip. If this happens:
1. First, check if the wall power outlet has power and if the home circuit breaker has tripped. Simply reset the breaker. However, if the circuit board is faulty, even after resetting the breaker, the circuit breaker will trip again when you turn on the treadmill. In that case, continue reading.
2. Check if the overcurrent protector near the treadmill power switch has tripped. A protruding button indicates that the overcurrent protector has engaged due to an overcurrent situation (e.g., the user weighs too much, or there is a fault on the circuit board). Gently press the protruding part down to reset it, then reconnect the power. This is similar to a treadmill's circuit breaker in terms of convenience.
3. Next, disconnect the treadmill's power, open the motor cover, and inspect the controller. Carefully check for any obvious cracks or burn marks on the components. You might even smell a pungent odor upon opening the cover. Examine the varistor for any signs of burning or cracks. This component protects the expensive downstream circuits from damage by short-circuiting under abnormal voltage conditions.
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