1. Using the motor manual start method, if the motor can start, it means there is a problem with the start relay.
2. For starter relays of the same model, please connect the circuit and conduct a power-on test. If the compressor is running normally, it means that the starter is faulty. If it should not run, it means that the compressor or motor is faulty.
3. For the single-arm starter relay, if the start contact is sucked down after power-on, the armature cannot automatically leave within 0.5-3 seconds. You can use a screwdriver to move the armature up to see if the motor can operate normally. If it runs normally, it means there is a problem with the starting relay. If the starting contact cannot be sucked down after power on, you can gently press the armature with a screwdriver to see if it can be picked up automatically after being sucked down. In this case, the motor runs normally, which also indicates that there is a problem with the starting relay.
