What should I do if the induction cooker is powered on and the E4 is displayed, and all the button

Hello, I am glad to answer for you, dear, Shang Pengtang induction cooker display E0** is the induction cooker does not check the pot, the reasons for the failure are as follows: 1, the bottom of the wire coil pot detection resistance and IGBT temperature detection resistance is damaged 2, the bottom of the motherboard a solder joint virtual welding V filter capacitor is poor caused by the main voltage is too low and the voltage detected by the synchronous circuit is abnormal. 4. The high-power resistance of the synchronous circuit is damaged or deteriorated (330K, 470K or 820K resistance), resulting in abnormal detection circuits.

Focus on checking the synchronous circuit (LM339 foot peripheral components, such as: tapering capacitor (2A222J)), PWM drive pulse loop (between R12 and IGBT control pole, pay special attention to C9, C10) 6, long line mold, rust, will cause bad contact, but also cause non-inspection.

This means that the E1 detection is not suitable for induction cookers. In the past, if the pot was removed, e1 would also appear, and if the pot was removed before, this fault was mainly due to the failure of the pot detection circuit, or there was a problem with the power supply.

Workaround:The user needs to replace the pot, if it still doesn't work, check whether the internal wiring has obvious breaks, and if it is found, it can be connected. If there is no obvious breakage, it is recommended to go to a designated repair shop for repair.

Hello, Shang Pengtang induction cooker fault ** is: E0, and keeps flashing, can not be heated, check 300V for 305V, 18V for, 5V I didn't find it on the board, I don't know if there is 5V, I suspect that there is a problem with the 18V circuit? Measured yes.

Is this fault caused by the low 18V voltage? Ask for answers.

If you don't understand, it is recommended to take it to the home appliance maintenance master for repair! If you know what you don't know, you can ask me directly. In this case, the voltage is measured first: 300 18 5 V, followed by resonant capacitance, synchronous detection, pot inspection circuit, etc.

The possible reasons for this are roughly as follows:

1. The detection resistance at the bottom of the wire reel and the IGBT temperature detection resistance are damaged 2. A solder joint at the bottom of the motherboard is soldered.

v The main voltage is too low due to poor filter capacitance, and the voltage detected by the synchronous circuit is abnormal.

4. The high-power resistance of the synchronous circuit is damaged or deteriorated (330K, 470K or 820K resistance), resulting in abnormal detection circuits, (Midea induction cooker case: R29 3901 chip resistance breakdown is disassembled and replaced with OK), adjustable resistance (maximum) 500 ohms; d1; d12

5. The PWM pulse signal is abnormal and the pot is not checked. Focus on checking the synchronous circuit (LM339 pin peripheral components, such as: silk fiber capacitor (2A222J)), PWM drive pulse loop (between R12 and IGBT control pole, pay special attention to C9, C10).

6. Moldy and rusty long rows will cause bad contact and unchecked pots.

7. The leakage of a 1kV porcelain capacitor of the pot inspection circuit causes the failure to inspect the pot 8. The microprocessor MCU is damaged.

It is recommended to take it to the home appliance repair master for repair.