Question about TurboChef TORNADO Electric Oven
F3 Magnetron Low Current. Replaced HV Diadodes, Capacitors andMagnetron. F3 Fuse is blowing now.
CHANGE Tranformer too. Did you check ampere at the blue wire looping at control board? Must be around 15 to 17 amps only.
Posted on Dec 08, 2014
Did you check transformers. also k1 , k2, k3, relays. also make sure all wires are put back right and the diodes are going in the right direction.
Posted on Mar 29, 2014
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Posted on Jan 02, 2017
F3 errors can indicate a mag problem. Did you replace both mags? It can also be a door switch. If your fuses are good, you need to inspect the 2 magnetrons. If you have a burned tip on one the waveguide and waveguide cover it will need to be replaced.
Posted on Feb 05, 2011
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Discharging can be done by unplugging the oven and then short across the red wire on each capacitor to the chassis with an insulated screwdriver.
1. Remove the top and right side covers.
2. Enter the test mode. (From the OVEN OFF mode, simultaneously press
BACK and ENTER keys, enter the code 9-4-2-8 and press ENTER).
3. Place amp meter on the brown "ct" wire for amp reading. Wire is coming from the primary side of the
HV transformers and looping through the black plastic current transformer on the main control board and back to the HV transformers.
4. Press and hold the MGTRON soft key on the keypad to energize the magnetrons.
5. Observe the amperage on the meter. Typical readings are:
NORTH AMERICA: 12-14 amps at 240VAC/13-16 amps at 208VAC.
If you are getting 12-16 amps then change the I/O board.
If you are only getting 7 or 8 amps then only one side of the of the HV system is not working correctly. You will need to figure out which side is bad by un-plugging the power wires going to one of the HV transformers. Then test again and if you get no amps you have found the bad side. Replace the HV transformer, cap and diode.
If you are not getting any amps then check the F3 fuse it will most likely be blown. Replace and start over
Good Luck If you have anymore questions just ask.
Nov 12, 2010 | TurboChef TORNADO Electric Oven
Nov 08, 2010 | TurboChef TORNADO Electric Oven
F3: Magnetron Current Low
Fault is displayed when the current transformer
(CT) on the I/O control board does not detect
enough current. The fault is monitored when the
microwave is on during a cook cycle or self-test.
The fault is cleared from the display at the onset of
a cook cycle if the CT detects current or when the
magnetron is successfully energized in Test Mode
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