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 Moderated by: BrntToast, RegUS_PatOff, appl.tech.29501 Search Our Sites for More Info!
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kitchenaid cooktop KFGU766VSS01  Rate Topic 
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 Posted: Tue Oct 19th, 2010 11:20 pm
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Mufasa



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Greeting

customer called to have this new cooktop hooked up, said he got a great deal on it.  Once connected, it didn't work.

I opened it up and found the tech sheet (woo hoo) and went to work. No spark so I  checked the power, check the connections make sure no loose wire connectors.

then move on to the transformer witch didn't check out (OK found the problem) order a new transformer and installed it. same problem, now I didn't check the one before I installed it (figured it is good). so back I go to my supplier and brought with me the tech sheet to double check the values on the transformer. they ordered me an other one.

now here is my question, is it possible to have blown the trans during the install?

does any one know if there is a recall on this cooktop? (2 new trans and both bad) 

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 Posted: Wed Oct 20th, 2010 12:34 am
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Samurai Appliance Repair Man
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Can you post or fax the tech sheet? At the least the schematic portion of it. My fax is 866-315-4504.

Were you getting 120vac to the spark module?



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 Posted: Wed Oct 20th, 2010 01:43 am
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RegUS_PatOff
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Mufasa wrote: ... is it possible to have blown the trans during the install?  ... 

if it was mistakenly connected to 240v ...


KFGU766VSS01

KFGU766VSS00 Tech Sheets



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 Posted: Wed Oct 20th, 2010 01:48 am
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Samurai Appliance Repair Man
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Awesome, domo Reg!

Mufasa, looking at your schematic, you don't have a separate spark module-- it's built in to the control board.

What measurements did you do on the transformer? Did you do any voltage checks?

Also, did you check for 120vac between pins 9 and 10 of the P2 connector?



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 Posted: Wed Oct 20th, 2010 02:08 am
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Mufasa



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did ohm check on transformer

ref tech sheet page 2 and table on page 4

Rp  primary coil    60+-6  ohm   (good)

Rs  1-2  secondary coil   4.7+-.5  ohm   (good)

Rs  2-3  secondary coil   4.7+-.5  ohm   (good)

Rs  4-5 secondary coil   306+-30  ohm ( BAD  this one is open)

I checked Voltage at transformer 120v

will check pin 9 and 10 at P2 connector and report back

Demo

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 Posted: Wed Oct 20th, 2010 02:22 am
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Mufasa wrote: Rs  4-5 secondary coil   306+-30  ohm ( BAD  this one is open)

digital OHM meter, 1k scale ?  (or 2k scale is OK)

 



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 Posted: Thu Oct 21st, 2010 01:59 am
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Mufasa



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using a Fluke digital multimeter, showing an open circut at these points

should have new transformer in next two days.

 

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 Posted: Thu Oct 21st, 2010 02:39 am
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RegUS_PatOff wrote:  1k scale ?  (or 2k scale is OK) 



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 Posted: Sat Oct 23rd, 2010 05:42 pm
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Mufasa



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Reg, meter is auto ranging( Fluke series 77)

OK got the new transformer and this time i made sure to check it. all points checked according to the table on the tech sheet. installed it and connected all wires. plugged it in and no workie!@#$>. the hot surface alarm would come and off in 5 sec intervals. so I take it back apart and check the transformer, the 4 to 5 points are now open ( this was at 306 ohm before the install).

don't know what to do next, one thing for sure is something is causing the transformer to go bad?

any thoughts? 

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 Posted: Sat Oct 23rd, 2010 06:13 pm
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RegUS_PatOff
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OK ...

check for a short across where 4 & 5 connects to the Control Board

(won't matter if Transformer is connected or not)

 



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 Posted: Tue Oct 26th, 2010 11:12 pm
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Mufasa



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Reg, I checked between these points .7 ohm reading. is this normal?  also checked for continuity in all wires.

what next?:headscratch:

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 Posted: Wed Oct 27th, 2010 01:46 am
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Could it be the hot and neutral are reversed in the power outlet ?



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 Posted: Wed Oct 27th, 2010 02:13 am
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RegUS_PatOff
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Mufasa wrote: Reg, I checked between these points .7 ohm reading. is this normal? 
tech sheet says it should be 360 OHMs



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 Posted: Wed Oct 27th, 2010 02:36 am
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Mufasa



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Reg,

the 306 +- 30 ohm on the tech sheet is for the transformer. I didn't see anything indicating what the values on the re-igniter valve control should be.

K-dog,

you may be on to something, it would explain why the transformer is being blown if the wires are crossed. will check tomorrow.


domo

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 Posted: Wed Oct 27th, 2010 03:59 am
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kdog wrote: Could it be the hot and neutral are reversed in the power outlet ?
shouldn't matter ..

 

Mufasa wrote:
Reg,

the 306 +- 30 ohm on the tech sheet is for the transformer

you are correct ... ,    :ooo:

 

although 0.7 OHMs on the Control Board doesn't look good ..

almost a short
(what does the OHM meter read with the probes shorted?)

IF the voltage was 1v, that would draw more than 1 Amp

IF the voltage was 2v, it would draw more than 2 Amps

etc ..


looks like a bad Controller



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 Posted: Thu Oct 28th, 2010 10:07 pm
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Mufasa



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Reg, the meter reads 0 ohm when the probe touch each other, is this the same as shorting the probes?

why is the "hot surface" temp alarm keep going off, on the drawing it show it open?

don't know what the quote below means?

IF the voltage was 1v, that would draw more than 1 Amp

IF the voltage was 2v, it would draw more than 2 Amps



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 Posted: Thu Oct 28th, 2010 10:34 pm
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RegUS_PatOff
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1) yes

2) I don't know, yet ..

3) .7 OHMS would seem to indicate something is wrong with the Controller



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