Induction cooker heating for a while, without power, not heating, button function can be used, that is, it will not heat, unplug and plug in order to use, what is the matter?
Trouble points of intermittent heating;Electromagnetic oven intermittent heating fault, implicated fault point is more, overhaul more troublesome. According to the experience, it is easy to judge the range of the fault by observing the magnitude of the current:The 1. current jumps in the range of 0---7A. Should focus on checking synchronous circuit, big resistance value, whether to change the value, measuring synchronous circuit two sampling terminal voltage is normal.The 2. current jumps in the range of 0---4A. Should focus on checking the current detection circuit components, such as current transformers (new furnace Kang copper wire and double operational amplifier circuit), adjustable resistors, diodes, resistance capacitance components and SCM circuit.3. if the current jump is not regular, the surge protection circuit should be checked to check whether the components are good or not.4. small files heating normal, large files heating intermittent, can check 300V and filter capacitor, check 2 F anti-interference capacitance capacity is reduced, can use 3.3 F capacitor to see. But because the grid power supply wire diameter is too small or poor contact socket, due to the use of the pot does not meet the requirements caused by the fault can not be ignored.
Electromagnetic oven, electromagnetic range. The following points are used in the induction cooker:1, low frequency electromagnetic radiation electromagnetic oven is certain, not with the card (bank card) watches not antimagnetic objects to operate, so as not to be magnetized, degaussing or damage.2, although it is not possible to prove that small amounts of low frequency radiation are harmful or harmless to the human body, pregnant women and children should not use electromagnetic ovens, just in case.3., the operator and electromagnetic stove distance can not be less than 0.5 meters, and do not stand by the induction cooker for a long time, in order to reduce the acceptance of electromagnetic radiation, to ensure safety.4 electromagnetic oven is heated by magnetic induction eddy current, which is the use of current through the coil produces a magnetic field, when the magnetic field lines within the iron pot through the bottom, cutting lines, resulting in countless small eddy, the iron atoms to rotate at high speed and collision friction heat and direct heating of iron pot itself in the pot of food. In other words, is the ferromagnetic in the alternating magnetic field hysteresis effect, heating to heating, so pot with iron pan, can not use ceramic pot. If you use other metal pot aluminum pot, copper pot, the heating efficiency is very low, basically can not be used.
There are several possibilities for this phenomenon:1 thermistor problems, replace2, the heat dissipation of the circuit is not good, so that the heat protection is frequently turned on, and the cooking can be changed at the ventilation place;The oscillation capacitor in the 3 PWM generated wave circuit has problems;4, the power plug is a bit loose, may also cause this phenomenon;5 turn on the heating mode, select the maximum boot test, there may be a problem mode;6 CPU is out of order. This is equivalent to changing the motherboard only.
