Reasons: The microwave power supply is not in good contact or has no voltage; the ground wire and the measuring wire are not in good contact; the ammeter is damaged; the power supply is faulty; the magnetron is faulty
Cause: poor contact of microwave power supply or no voltage; Poor contact of ground wire and measuring wire; Ammeter is damaged; Power failure; Magnetron fault
Cause: Poor contact of microwave power supply or no voltage; Poor contact between ground wire and measuring wire; Damaged ammeter; Power failure; Magnetron failure