Electrolux EKI6450A0X Induction Cooker: Error E7 Overheated Module, Fan Functionality & Solutions

Question

As in the title, error E7 appears on the right module after a long work. I found that the E7 error relates to an overheated module - check the fan. The fan is functional - clean. Now is E7 really a temperature error on the module? If so, how is temperature control implemented? I am inclined to...

Grzegorz740 · Answer

In my opinion, replacing the thermal paste will not hurt. I suspect that temperature control can be accomplished with either a thermocouple or a thermistor. Though I'm not sure. I don't know where you read the meaning of this error code because I found on the Internet that it means something else. In the attachment I will present what I found. 180224_...pdf Download (196.72 kB)

sigwa18 · Answer

This is the version for cookers from the years up to 2010.

sigwa18 · Answer

The topic returns all the time. After a longer operation, the right module turns off with the message E7. The temperature sensors have the given values and despite their disconnection and low temperature, the error E7 continues. I am surprised a bit by the voltage on the 5V line is 4.66V to 4.8V on the panel power supply. The fan power supply should theoretically be 12V, but it is 7.8V. I am also surprised that on the right panel the fan starts only under load, and on the left panel when it is turned on.

Grzegorz740 · Answer

When the voltages are low, I suspect that something is overloading the power supply. Maybe there is a short circuit somewhere or a short circuit. Look carefully at the 5V and 12V lines. On a properly functioning panel, the 5V voltage is also low?

sigwa18 · Answer

Yes the panel works normally. The left inverter works normally and the right one crashes E7 under load for a long time. I am looking for a detailed description of the E7 error. It is certainly due to overheating of the transistor heatsink and the bridge, but despite the cold sensor it still crashes. So it has to mean something else, or the mechanism for calling it out is different.

Grzegorz740 · Answer

Transistors and bridge get hot? Is the temperature difference between the transistors and the bridge between the inverters big? Because if there is a big difference, you need to find the reason why the transistors and the bridge get too hot. I don't think you can find the exact E7 error description anywhere. Unless you can get a service manual somewhere.

sigwa18 · Answer

The difference is, but is rather due to different fan operation. The left one works all the time after being turned on, and the right one only with a heavy load. The problem manifests itself most often on Sunday. When cooking the broth. You know first the maximum, because you need to boil these 3-5 liters of water, then for a minimum of 2 hours, but always after about 1 hour it will fail error E7 . The error also appears after about 15 minutes when I give both fields to 9. In the left one, there is no this problem, but it will show overheating of the field.

Knicram · Answer

I warmly welcome, I have a question whether the problem was solved, because I have an analogous situation and I do not know where to look for the cause.

sigwa18 · Answer

Unfortunately, I have not yet found the cause of the failure. What I was able to observe is that the reason for the E7 error is actually overheating of the transistor heatsink and the bridge or the lack of power to the fan. For me, the fan turns off, although it should not. Due to the lack of ideas, I will replace the VIPer17 chip and the optotransistor. Under the influence of temperature, any element stops working and the fan stops working.

sigwa18 · Answer

Replacing the viper17L systems and the fan's optocoupler did not improve. I also checked the relay and replaced the capacitors before the Viper17l system. The right inverter continues to give error E7 after a long operation. Temperature sensors are also swapped without improvement.

Piotr2608 · Answer

E7 is a problem with the cooling fan, from what.
E7 - Fan fault - Fan blocked - Fan not connected

1) Switch on 1 hotplate for 3 minutes.
The fan should start working. If not, check fan underneath
locking angle and connector on the induction module.
2) Replace the fan. Note: This is not possible with all induction modules.
3) If the fault persists or the fan cannot be replaced,
replace the induction module. It may happen that the induction module housing is bent, blocking the fan

Grzegorz740 wrote:
In the attachment I will present what I found.

You can put this attachment in your shoes

sigwa18 · Answer

The fans are both running at full power, but after some time error E7 pops up. So the fan is in working order, the problem is with its control. After switching on, the kitchen from the machine starts the left fan and the right one is standing. Only after switching on the field from the right inverter, it starts moving.

Piotr2608 · Answer

And did you swap fans places? Just because it moves doesn't mean it's operational.

sigwa18 · Answer

I'll try, but in my opinion it's not. It seems to me that the problem is with the 5V power supply under load. And the E7 error in my case is too high temperature on the heat sink. Specifically, a bad reading from the temperature sensor caused by too low power supply to this sensor, i.e. the 5V line.

Piotr2608 · Answer

You are interesting. Have you measured the 5V lines without the fans plugged in?

sigwa18 · Answer

It turned out that the fan was to blame. After swapping the sides, the error went to the left inverter. I have to make accurate measurements of both, which means that the system does not like this particular fan. The price of a new one is 200 PLN, so I will rather let go of a new one.

Piotr2608 · Answer

Current consumption higher than nominal by min. 5-10 mA. The lack of air circulation causes greater wear of the slide bearings, the motor runs with greater resistance and the power consumption of the fan increases. Simple?

sigwa18 · Answer

The kitchen is 6 years old and the wife prefers the right fields, the only thing interesting is that the error crashes only after 10-15 minutes at maximum field power.

sigwa18 · Answer

It is already known that the fan turned off despite the voltage being applied to it, I did tests and compared the currents on both of them were identical only after a long operation the unit simply turned off. There is a bldc motor in it and a simple control circuit probably fell down. So it was not the cooker that turned the fan off, but the fan that turned itself off and the kitchen caught an error because the fan was not working.

Grzegorz740 · Answer

Maybe the fan motor control system can be repaired. And if gray fails, the only option is to buy a new fan.

Piotr2608 · Answer

If the author improves the hardware model, maybe something can be invented. At this moment - EKI6450AOX it is an electric oven, not an induction cooker.

sigwa18 · Answer

The author will not correct it because it is good. It is an induction cooker with an oven in one housing and such a combo. See photos on google.

Piotr2608 · Answer

The combo is not a combo on the induction hob is a model sticker. In fact, it is not physically one device, but two different ones forming one whole.

sigwa18 · Answer

Where can you find the plate model?

sigwa18 · Answer

Currently replaced fan and everything flashes beautifully. The guilty vet that turned off at full speed. Probably faulty bldc control in the fan.
Advice for others with the E7 error, replacing the fans with places, as the error will go to the second field, fan replacement because it is damaged.

[Solved] Electrolux EKI6450A0X Induction Cooker: Error E7 Overheated Module, Fan Functionality & Solutions

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