Induction cookers are more convenient for people nowadays. You don’t need to light a fire, just plug in the electricity and press a few buttons to boil water and cook. Airmate's induction cooker is one of the better brands on the market today. Many families also choose to use Airmate induction cookers. However, everyone may have encountered a problem, that is, the induction cooker is powered on and the buttons are not out of control, but it does not heat or heats intermittently. Today we will take the Airmate CE2076H as an example to talk about the troubleshooting method of the Airmate induction cooker not heating when powered on and the integrated intermittent heating.
Fault phenomenon: Airmate induction cooker CE2076H is powered on, the panel buttons work, but cannot heat.
Analysis and maintenance: The relevant circuit is shown in the figure below. The cause of the fault is: 5μF/ The 400V filter capacitors are abnormal, and some are even bulging. Eventually, the DC voltage after rectification and filtering is 200V, which should be 300V normally, causing the protection circuit to operate and therefore not heating. Just replace the filter capacitor and you can get rid of the problem easily. The malfunction of the whole machine without power was caused by the 15A fuse blowing out and the rectifier bridge and IGBT tubes breaking down. At this time, remove the rectifier bridge, IGBT tube and fuse, replace it with a new fuse, and power on the rectifier bridge. If the panel indicator light and on/off button are normal, measure the voltage across the 5μF/400V capacitor to be around 200V, indicating that the filter capacitor is broken. . Replace the IGBT tube and filter capacitor with new ones and eliminate the fault.
Fault phenomenon: Airmate induction cooker CE2017, intermittent heating occurs when turning on the power and placing the pot for heating
Analysis and maintenance: The main circuit board of the induction cooker is CE2017-POWER. It is the product of Airmate Company in 2007. One of the products developed. When the induction cooker is in a heating state and has intermittent heating, its maintenance and testing scope includes: high and low voltage power supply circuits, LC oscillation circuits, synchronous comparison circuits, high voltage detection circuits, surge protection circuits and current detection circuits.
1. During maintenance, open the case and power on for testing. Use the 500-type multimeter to measure the three voltages of the whole machine in the DC voltage 54V, 50V, and 10V gears. That is, the voltage at both ends of the filter capacitor C2 (4μF/275V) of the high-voltage power supply circuit is +305V, which is normal; the filter capacitor of the low-voltage power supply circuit is +305V. The voltage of EC91 (220μF/25V) to ground is +18V, which is normal; the voltage of EC94 (100μF/16V) to ground is +5V, which is normal. If the above voltage is abnormal, it is mostly C2, U90 (VIPER12A), R90 (22Ω,/2W), L90 (DR4W9), Z90 (20V/0.5W), D92 (1N4007), EC95 (lμF/50V), Z91 (5.6 V/0.5W), Q90 (8050D), etc. are damaged, causing the IGBT tube to explode when the induction cooker is powered on, or there will be no power indication, constant pot inspection, alarm but no heating, no alarm but no heating, and intermittent heating. Wait for failure.
2. Remove the heating coil plate, power on, and measure the IGBT tube collector-to-ground peak voltage of the LC oscillation circuit that quickly rises to +80V and then drops to +0.3V. Normal: control electrode The voltage between G and ground is ov, which is normal. If the above voltage is abnormal, it is likely that C2, C3 (0.3μF/1200V), IGBT tube, C21 (101), Ul (LM339), Q2 (8050), Q3 (8550) and heating coil plate are damaged, resulting in damage to the induction cooker. Electric heating will cause IGBT tube explosion or failure such as constant pot checking, alarm but no heating, no alarm but no heating, and intermittent heating.
The above content is the cause and repair method of the failure of Airmate induction cooker not heating or intermittent heating when the power is turned on. This also applies to other models of Airmate induction cooktops. However, the editor would like to remind everyone that you must pay attention to safety when repairing the induction cooker. If you do not understand the circuit, it is better not to dismantle and repair it casually to avoid some accidents. The best way is to take it to a maintenance outlet and ask a professional repairman to repair it. You can also go to a sales outlet or manufacturer for repair or replacement.
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