First, induction cooker failure and maintenance - explosion - burning insurance and IGBT
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The specific performance is that the power does not react, the whole machine does not work. When we disassemble the machine, we will find that the safety has exploded, and exploded very badly, and the glass walls of the safety have been blown black. In this case, we should not rush to replace the parts. Also check to see if there are any other broken parts. If this is the case, all the large resistance in the circuit are measured again, and the two triodes (8050,8550) that drive the IGBT should also be measured, and look at the 300V filter capacitor and 0.33uF resonant capacitor.
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Second, induction cooker failure and maintenance - the whole machine has no reaction but no explosion
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Test machine, the whole machine does not work, disassemble the induction cooker, found that the fuse is intact. This situation is generally the induction cooker power conversion chip burned out, it generally produces 18V voltage, and then 7805 into 5V voltage for the CPU to work, without 5V, the CPU does not work, the whole machine does not work. Induction cooker such chips are generally used viper12a, viper22a, thx203h and so on. Test the periphery of the power conversion chip to see if there is a small device associated with damage, if there is, replace it.
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Third, induction cooker fault and maintenance - can be turned on but show the fault code
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This kind of failure should first understand the meaning of the code, and then the purpose of maintenance. There are many induction cooker fault codes on the Internet, and we can make full use of them. Such failures are generally those with large resistance values and large body resistance values, which can be measured one by one and replaced with variable values. Also check the transformer, 300v\/5uF capacitor, thermistor, and the potentiometer in the induction cooker. As long as these places are found, such faults can generally be eliminated. A few may also be caused by LM339 damage, which can be verified by substitution methods.
Induction cooker is a kind of electric heating equipment, common faults are the following, need to be repaired:
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1. Heat is not hot or uneven heating
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The cause of this failure may be a faulty power socket or wire, or a damaged controller or hot pot holder. Check whether the plug, power cord and socket contact is good, and check whether the socket is effective, if these faults are eliminated, you need to replace the controller or hot pot holder to solve the problem.
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2. The display is abnormal or cannot be started
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Sometimes the display is not clear or the machine cannot start, which may be a controller failure, or a problem with the circuit board, you need to check whether the power cord is connected correctly, or use a multimeter to check whether the components on the circuit board are damaged and replace them accordingly.
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3. Abnormal odor or leakage
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If there is an abnormal smell or leakage phenomenon, should immediately stop using, this may be the power socket or wire loose, power line damage, induction cooker inside the line short circuit or other internal failure. Should first turn off the power, disassemble the machine to check the circuit board and line, find the location of the circuit board and line damage, and repair or replace.
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Please note that in any case, in order to avoid safety problems, do not disassemble or repair work without your own electrical installation or mechanical structure repair skills. Professional technicians should be asked to check and repair.
First, no heating or intermittent heating
Sometimes when we cook, we will find that the heating of the induction cooker is not very stable, and sometimes the heating time is relatively short, which is more difficult for the fault, which involves the temperature detection resistance, synchronous oscillation circuit, IGBT driver, IGBTC extremely high voltage protection circuit, etc., may be related to this kind of failure. If it is repaired by itself, it will make the induction cooker break, and it can only be sent to a professional maintenance point.
Second, boot display fault code
Many times when people open the induction cooker ready to use, they will find that there will be some fault codes on the display screen, and they can not be used normally. For this kind of failure, we must first understand the meaning of the code, and then the purpose of maintenance. This kind of failure is generally because the resistance of those large resistance values is changed, which can be measured one by one, and the variable value is replaced. At the same time, check the transformer, 300v\/5uF capacitor, thermistor and potentiometer in the induction cooker. As long as these places are found, this kind of fault can generally be eliminated.
3. There is no response when you press the power button
Induction cooker boot no response is also one of the faults. This kind of failure is relatively good maintenance, not a major failure that is difficult to repair, and we can rest assured. Generally, the key is broken, or the key plate is dirty and leaking, for this problem, as long as the key or cleaning the key plate can be solved.