There are mainly two types of commercial cooktops: one is a gas cooker, and the other is a commercial induction cooker. （commercial oven）

      Commercial induction stoves, like other homes, have a certain life, and there may be some failure problems when used for a certain period of time, light maintenance, heavy scrap, which is not avoidable by any equipment. When the commercial induction cooker fails to repair, it needs to be carefully looked at, because some problems of the induction cooker are obvious, but there are some problems hidden deep, and one is missed without attention.

commercial oven

      How to correctly analyze and maintain the failure of the hotel's commercial induction cooker? Kyoto gives you a few diagnostic suggestions.

      1, when the customer gives the commercial induction cooker to you, do not rush to test the machine, and first ask about the fault phenomenon of the induction cooker and the specific process and cause of damage.

      2, if there is oil on the circuit board of the commercial induction cooker, it is recommended that you clean it first, and the transformer and current transformer should be removed when cleaning, and immediately dried after washing. Induction cooker heating is not normal, part of the reason is caused by IGBT drive on the tube pin is too dirty leakage, the electric board moisture can also cause a variety of inexplicable faults, maintenance induction cooker with an oven, with a temporary modification of the scrapped microwave oven, economical and practical.

      3, when the power circuit fault maintenance, 18V input voltage please measure whether the positive electrode of D31 has 19V voltage, if there is 19V voltage, you can judge that it is D31 open circuit. If there is no 19V voltage, please measure whether the positive electrode of the EC22 capacitor has 19V voltage. If there is 19V voltage, it indicates that the voltage transformer l101 is faulty. Replace it and remove the fault.

      4, for the measurement of electronic components, it is recommended to leave the circuit, so as to avoid errors. Filter, resonant capacitor and Constantan wire, their pin welding, and sampling circuit line interference are common soft faults in induction stoves. Careful observation is required. A few days ago, I repaired a wonderful electromagnetic cooker maintenance board, there is an alarm sound, but no PWM pulse signal output, replace the 2pin 5pin parallel film capacitor of 339 (2A103J) after troubleshooting, some faults do not be imprisoned in experience, but also have bold innovation.

      5, repair the fault of the reset circuit, in the case of measuring the 8th pin voltage of the main chip is 0V, you can measure whether the base of Q3 has +2.2V voltage, if not, you can check R61, Z1, R16. If the voltage is normal, you can use a multimeter to carefully check the following components: Q3, R4, C7 is normal, if the components are checked normal, you can replace the main chip.

      6, burning IGBT induction cooker, in addition to check the reason should also be timely replacement of the limiting voltage regulator diode, there is no design limiting stability protection circuit, should directly replace the drive tube, idle induction cooker for too long no matter what the fault, it is recommended to check the resonance, filter the two capacitors. Capacity is easy to become small, invalid or poor.

      7, control board maintenance, it is recommended to open the key through the replacement, because the adhesion of the key, leakage, leakage can cause the machine can not open, can not close the machine and the control board function chaos, caused by the surface cover water failure; So we can waterproof the lid. To prevent the failure from happening again. When maintaining the switching power supply, be sure to disconnect the load, because the components of the load 5V, or 18V input pin to the ground short circuit, leakage, but also produce the switching power supply without 5V or no low voltage power supply, low voltage abnormal phenomenon.

      8, circuit board repair do not think that everything is all right, it is recommended to check the accessories, their abnormality is also one of the main reasons for the failure of the main board: bad wire tray not only damage the terminal, but also make the IGBT burn, fan is bad, cause 18V is too low, can also make the IGBT burn, I also found several cases of induction cooker due to fan short circuit burnt switching power supply phenomenon.

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