1. If the motor can be started manually, it means there is a problem with the starting relay.
2. For the starting relay of the same type, please connect the circuit and conduct power test. If the compressor runs normally, there is a problem with the starter.
3. For single-arm start relay, if the start contact pulls down after power is switched on, the armature cannot leave automatically within 0.5-3 seconds, and the armature can be moved on with a screwdriver to see that the motor can run normally.If the operation is normal, it indicates that there is a problem with the starting relay. If the starting contact cannot be sucked down after being powered on, the armature can be pressed gently with a screwdriver to see whether it can be picked up automatically after being sucked down.When the motor is running normally, it also indicates that there is a problem with the starting relay.