air conditioner high-low voltage error

[dodo41]

1- Yes
2- Doesn't Have
3- I tried it in all modes but it doesn't work.
4- Not in timing mode

I think I can't start any mode due to Error E6.

 

[marconi]

Please measure and report these voltages as described in turkaircon2 below.

 

[dodo41]

I will share in a few minutes. Thank you
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V1: 0V
V2: 0V
V3: 0V
V4: 0V
V5: 0V
V6: 0V
V7: 0V

V9: 14.25V
V10: 14.35
V11: 14.35V
V12: 14.30V
V13: 14.50V
V14: 14.55V
V15: 14.60V
V16: 14.35V

Black stay in the 8
Dc 20V.

 

[marconi]

They are good readings. I suspect the air sensor thermistor in the inside unit may be defective so no demand for the outside unit to run is generated.

Can you find the thermisters in the inside unit? They should be near the coil and look something like the one shown in this GoMaster youtube clip which also explains how to test using your Uni-T on the Ohms range:

How to test and replace Thermistors (temperature sensors) on split air conditioner AC | NT Water Heaters & HVAC - http://www.ntwh.org/how-to-test-and-replace-thermistors-temperature-sensors-on-split-air-conditioner-ac/

or in this one:

View: https://www.youtube.com/watch?v=JaX2G3F8eDU

 

[dodo41]

Sensor inside copper tube

 

[marconi]

That looks to be an acceptable reading. Can you make the sensor colder - dip it in some cold water - to see if its resistance decreased? And then make it warmer - perhaps hold it in your hand - to see if the resistance goes up.

Is that the only sensor?

Could you tell me what is written under the white label on the large integrated circuit?

And also tell me what signal and sensor cables go to the main circuit board and from what. A labelled picture would be good.

I can only find an owners manual for your aircon and it is in Turkish.

https://static.vestel.com.tr/kullanimkilavuzlari/52014084.pdf

Marconi

 

[dodo41]

In Turkish: " E6 " Yanıp Sönerse ŞEBEKE VOLTAJI AŞIRI YÜKSEK DÜŞÜK ARIZASI
In English: If "E6" Flashes, OVER VOLTAGE OVERHIGH LOW FAILURE

 

[marconi]

I will do some research but it will not be until later or tomorrow morning.

To produce an error code like that it seems then that some voltage(s) are being sensed and monitored. I will examine the main circuit board again to see if I can identify such sensing and monitoring circuitry.

I hope it is not too hot in your home.

Thank you for keeping me amused with this problem during the current emergency when we all have to stay at home.



Marconi

 

[dodo41]

VESTELLG - C V03

Sensor located on the back of the air conditioner (Picture 2). But I don't know what the sensor does. It says LR83355 on its cable.

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[QUOTE = "marconi, yayın: 1620058, üye: 87486"]
Biraz araştırma yapacağım ama daha geç ya da yarın sabaha kadar olmayacak.

Böyle bir hata kodu üretmek için bazı voltaj (lar) algılanıyor ve izleniyor gibi görünüyor. Böyle bir algılama ve izleme devresini tespit edip edemeyeceğimi görmek için ana devre kartını tekrar inceleyeceğim.

Umarım evinizde çok sıcak değildir.

Hepimizin evde kalmamız gereken acil durum sırasında bu sorunu beni eğlendirdiğin için teşekkür ederim.



Marconi
[/ ALINTI]

I'm Waiting For You Thank you everything

 

[marconi]

You have two sensors as I thought. Please test the plastic one which is on the coil as well - you have your finger on its cable..

 

[dodo41]

Gives 10.5 Resistor at 20K Resistance level.

 

[marconi]

Resistance -> temperature

Seems right again. Both sensors then seem to be fine.

 

[dodo41]

What do you think about the contactor?

 

[DPG]

Excellent and methodical remote diagnosing by Marconi.

 

[marconi]

dodo41: Good morning. Does the blower/fan on the indoor unit run? Could you tell me where it connects to on the main circuit board?

 

[marconi]

Today would you take some voltage measurements as shown in turkaircon3 below. Meter set to dc voltage 0-20V.

There is some voltage sensing being done at this position which feeds into the large microcontroller chip. It may be the preset level is too low or high - as determined by the blue round potentiometer I have pointed to - and thus generating the E6 fault code; let us follow that line of investigation today.

Once you have told me the voltages I will tell you what to do next.

Again do be careful because there is 220V ac on this board but not at the points you are measuring voltage.
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I don't think the contactor is the cause of the problem.

Please measure and tell me your mains ac voltage.

 

[dodo41]

I'm sorry for the late reply.
The voltage coming to the air conditioner outdoor unit is in the 1st picture.
The voltage coming to the air conditioner indoor unit is in the 2nd picture.
The voltage values you mentioned in turkaircon3 are 0-20V. I measured at dc level and Values:
V1: 12.57V
V2: 0V
V3: 0V

 

[marconi]

dodo41:

So your mains supply voltage is normal for you at 220V - good; it is not low and good enough to power your air con.

Please find a small screwdriver which will fit in the slot on top of the white round dial of the blue potentiometer I pointed to with a blue arrow in turkaircon3.

Mark the position of the arrow on the white dial so we do remember it.

Set up your voltmeter to measure V3 again. As you do this the aircon may start so do not be surprised. Keep watching your voltmeter and very slowly turn the white dial a small amount one way. If the voltage remains 0Volts turn it a little more. If it remains 0Volts turn it a little bit more. If the voltage has stayed at 0V move the white dial back to the position of the mark.

Set up your voltmeter to measure V3 again. As you watch the voltmeter turn the white dial a little in the opposite direction until the voltmeter shows a voltage and then stop. Now try to start up the aircon if it has not already.

As soon as the voltmeter shows a voltage you can stop turning the white dial.

 

[dodo41]

I tried more than 30 minutes. I made very fine adjustment but I couldn't see any value other than 0V.

 

[marconi]

I was being perhaps too careful before.

The dial turns through less than one circle. Now turn it full way to the end stop and see what happens. If nothing happens turn it the full way in the opposite direction to the other end stop. Again let me know if you measure a voltage V3 - I am expecting you to measure 12V.

I think the potentiometer is open-circuit along its main track and the slider is on the ground(0Volt) side of the open circuit. The idea in this message is to move the slider to the other side(12V) of the open circuit.

This small circuit detects when the incoming mains voltage is too low to run the air con. A 0V output indicates to the microcontroller (the big ic) that the mains voltage is definitely too low. To run the air con the microcontroller needs a voltage input above a preset value internal to it. The little circuit of the pot' and the resistor forms a potential divider across the output of a 12V supply at a mains input voltage of 220V. The clue is there is no voltage regulator on the dc side of this secondary power supply (unlike the other one we checked out).

Air con draws more current as the supply voltage reduces and can cause overheating of motors and thus damage to them. It is a good idea then to monitor the mains voltage.