The reason why the exhaust fan motor is not working pro […]
The reason why the exhaust fan motor is not working properly
The switch spring of the key loses its elasticity. Since the switch of the key loses its elasticity, it causes a bad contact during the operation of the key. At this time, the switch of the key must be replaced, and the exhaust fan can operate normally.
The motor's power cord is not in good contact. Exhaust fan motor At this time, you only need to re-solder the power cord of the motor, you can safely troubleshoot.
Poor contact in the motor starting capacitor connection. Check the connection of the starting capacitor. At this time, only need to re-weld to start the capacitor, and connect or replace the connection of the starting capacitor.
Test voltage is normal. Another serious problem is that the green LED does not illuminate after the start button of the motor is pressed. Use a versatile meter to measure whether the 12V power supply voltage is normal. If there is no 12V voltage and voltage, and check the low-voltage rectification filter circuit and related originals, if there is any component damage, it should be worse damaged components, and then check the 220V AC power supply. Whether it is connected or not, the key switch is blocked or damaged. If there is no abnormality in the above checks, the green light indicating tube should be removed and the green light indicating tube should be inspected. If it is damaged, the green light indicating tube should be worse.
other reasons. If, after the above checks, the fault cannot be eliminated, it means that the other circuit parts of the automatic control circuit are faulty. The electric control circuit should be checked, and the faulty component or device should be corrected to eliminate the fault.