Common faults and maintenance methods of rice cookers;
Plug in the power plug first, and the power fuse will blow immediately. Cause and maintenance: short circuit caused by water or rice soup in the power socket of rice cooker. In this case, you can dry the water in the socket and then continue to use it. Because of long-term use, the surface of the power socket or plug of the rice cooker is carbonized and short-circuited. In this case, the carbonized layer on its surface can be ground off with fine sandpaper and cleaned with alcohol.
Second, after cooking, you can't keep warm. Cause and maintenance: This fault may be that the surface of the normally closed contact of the thermal insulation switch is dirty or ablated, which makes the contact resistance of the contact too large, which leads to the closure of the contact and the blockage of the circuit, the heating tube does not heat up, and the rice cooker does not keep warm. At this time, the contact surface can be cleaned with fine sandpaper and plated with tin. If the insulation still cannot be maintained, the insulation switch can be replaced.
Third, cooking, causes and maintenance: This fault may be that the normally closed contacts of the insulation switch are sintered and stuck together. Although the rice has been cooked and the temperature limiter has jumped off, the heat preservation switch continues to energize the heating pipe and the rice will go bad. At this time, you can separate the contacts with a knife, and then clean the contact surface with fine sandpaper.
4. Raw rice is cooked into cooked rice, causes and maintenance: This failure is generally caused by the weakening of the permanent magnet ring in the temperature limiter. At this time, you can disassemble the temperature limiter of the rice cooker and check whether the magnetic ring is broken and how attractive it is. If the permanent magnet ring is broken, the temperature limiter of the same model must be replaced. If the suction decreases, the temperature adjusting screw on the temperature limiter can be adjusted by 1/4 turns at a time, and try to eat once.
Five, can't cook, reason and maintenance: the source line is open. Check the power cord with an ohmmeter, and the current limiting resistor is blown. At this time, you can check the resistance with an ohmmeter. If the resistor is burnt out, the current-limiting resistor of the same model must be replaced, and it cannot be directly replaced by a wire, so that the heating tube is burnt out. The rice cooker without limited current resistance works for a long time and burns out the heating tube. At this point, check the heating pipe with an ohmmeter. If the circuit is broken, it must be replaced with the heating plate.
The intransitive verb keeps the heat lamp on, but the cooking lamp doesn't. Cause and maintenance: the heating plate does not heat, the power cord is not good, and the heating plate does not heat. In general, the contacts of metal switches will be oxidized due to ignition. Just use sandpaper or a small file to polish the contacts, heat the heating plate, and check the cooking indicator light and current limiting resistance.
Seven, brown rice, magnetic steel lever can not fall, automatic reset, causes and maintenance: the compression spring in the magnetic steel temperature limiter is not elastic enough or loses elasticity, check the spring performance, replace the magnetic steel temperature limiter, foreign objects jam the spring, remove foreign objects or replace the magnetic steel temperature limiter, and the magnetic steel lever is inflexible, skewed and suspended. Check the installation of magnetic steel temperature limiter and lever bracket, and adjust or replace magnetic steel lever assembly.
Eight, the circuit board can not automatically enter the stew heat preservation state, reasons and maintenance: the main circuit board is damaged, replace the main circuit board, the main thermostat is abnormal, replace the main thermostat.