What should I do if the generator set fails to charge when charging?

The manufacturer believes that this problem may be caused by damage to the fuse or rectifier diode. When the fuse is blown, the charger's power indicator light does not light up; after the rectifier diode is damaged, the charger's power indicator light turns on, but there is no DC output. 1. The charger transformer is burned out. 2. The diode on the charger is burned out. 3. The charging ammeter of the charger is damaged. 4. The fuse of the charger is burned out. The troubleshooting method is: disconnect the connection line between the charger and the battery, use a multimeter with a DC voltage range (50V) to test the voltage between the two output terminals of the charger. Note that the red test lead is connected to the positive pole of the charger, and the black test lead is connected to the negative pole. No voltage output was found. Remove the charger casing and check the charging fuse. It is found that the 60A fuse is burned out. After replacement, the charger resumes normal charging and the fault is eliminated.