Breakdown maintenance of range hood

Lampblack machine malfunction one: after electrify, cannot start

Cause analysis and treatment: power line disconnection or joint unsoldering, carefully found out the disconnection or unsoldering, re-soldering;If the on-off switch is out of circuit or the contact contact is bad, check whether the breaker is well welded. If the contact contact is bad, please replace it with a new one.Motor start capacitor capacity reduction or short circuit, open circuit, it is necessary to replace the capacitor with the same specifications in order to make the motor run;Speed change coil broken or short circuit, speed change coil repair or replacement;If the bearing is damaged and the shaft is stuck, the bearing must be replaced;Short circuit of stator winding or connection wire break, repair or replace new product of stator winding.

Smoke lampblack machine malfunction 2: abnormal sound or noise are big when operation

Cause analysis and treatment: improper assembly makes the blade loose and causes abnormal sound in the air guide frame;Motor bearing wear seriously, must replace the same type of bearing;Motor assembly is poor, correct the motor stator rotor clearance to make it uniform, if there is axial channeling, should add appropriate washer;Adjust the dynamic and static balance of the blades;Air outlet piping design is unreasonable.Ducts as far as possible out of the wind turn, turn to radian large and round.

Lampblack machine breakdown 3: lampblack machine vibration is too big

Reason analysis and treatment: the fixing is not firm or the installation is bad, add rubber pad or foam plastic, the fixing is firm;There are foreign bodies on the leaves, and the internal scale is too thick.Spindle and blade sleeve eccentric, re-adjust the spindle and blade sleeve to make it concentric;Motor bearing wear or bearing hole is too large, replace with a new bearing of the same specification;Partial short circuit or break of motor winding, replace winding or motor.

Lampblack machine breakdown 4: oil leakage

Cause analysis and treatment: improper installation, insufficient elevation Angle, re-installation, so that it maintains a certain elevation Angle, so that the oil suction naturally smooth down the oil cup;Or add a screen at the air outlet and have a certain Angle, so that the oil droplets in the surface tension under the action of the drip;If the sealing strip fails for a long time, add rubber or foam strip in the sealing place to compress the parts and improve the sealing level;Without regular cleaning, the oil scale in the oil cup should be regularly cleared and each filter screen and pipeline should be cleaned to avoid smoke and oil scale overflow.

Smoke lampblack machine breakdown 5: smoke lampblack effect is poor

Cause analysis and treatment: the installation point is too high from the stove, and the installation point should be appropriately reduced;If the exhaust pipe is too long or the air outlet direction is not appropriate, shorten the exhaust pipe appropriately and re-select the air outlet direction;Seal strip failure and air leakage, replace the seal strip to make it tight seal;Internal circulation activated carbon failure, replacement of activated carbon;If the indoor and outdoor pressure difference is too large, properly open the door and window to reduce the indoor and outdoor pressure difference;If the voltage is too low, it should be equipped with voltage stabilizer if necessary.Suction passage is blocked by oil, clean oil.

Smoke lampblack machine breakdown 6: key switch is out of order

Reason analysis and treatment: if the key switch can be locked, and the motor cannot be started when all the gears are pressed, the public connection line will be broken, found out and resoldered;If one of the first gear press the motor can not run, the other gear is normal, that only out of control that gear contact damage or gear line off, should repair the contact and line;If the motor can be operated by pressing the key, the key cannot be locked after loosening. The main reason is that the conductive spring in the switch is out of contact with the conductive sheet, or the switch spring sheet is displaced or falls off, the spring sheet should be adjusted or replaced with a new switch;If the key switch is pressed, both gears are locked, indicating that the interlock spring is squeezed out of shape and displaced, the interlock spring should be adjusted and repaired.

Smoke lampblack machine breakdown 7: smoke lampblack machine influence cooking fire source quantity of heat

Causes and analysis and treatment: exhaust air volume selection is too large, resulting in heat waste, extended heating time, to choose appropriate exhaust air volume;Smoke lampblack machine installation is too low, should raise the height of smoke lampblack machine appropriately.

Smoke lampblack machine breakdown 8: smoke lampblack machine smudge is serious

Cause analysis and treatment: not timely cleaning range hood, should be timely cleaning wipe test range hood;If the air duct is not cleaned, please open the cover after power off, take out the baffle plate and filter, clean and install it.

Smoke range hood malfunction nine: touch switch is not working

Reason analysis: replace the switch glass plate.