Question about Panasonic NN-C994S Convection/Microwave Oven
We have a NN C2000P oven which was repaired in Sep. 2008.
The Panasonic guys replaced the magnetron and IGBT's.
Within a few months, the following problem is observed. When in heating mode, after about 8 second, a tick tick sound is heard and the oven shuts down.
However, the convection features work all right.
An IGBT is an insulated gate bipolar transistor - sort of a hybird between a bipolar transistor and a MOSFET.
These are the final output driver transistors in the high-voltage inverter.
If it stops after 7 seconds, it still has a problem with the inverter.
It's likely a bad transistor, an electrolytic capacitor with an internal short or bad ESR or altered value, bad connection on the inverter board, a shorted diode or blown resistor, or a bad connection in the wiring.
Reputable service centers will have a repair warranty, but it may only be 30-90 days.
Due to the lethal voltages used and produced in inverters, I do not recommend that an inexperienced person work on these.
You should use a Panasonic-authorized service center so they'll have the service manual and (hopefully) experience and training to repair inverters.
In the US, you can find an authorized Panasonic servicer here.
This sounds like a non-US model. If so, visit panasonic.net, find your home country, then find the service / support links.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Feb 15, 2009
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Posted on Jan 02, 2017
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