Question about TurboChef TORNADO Electric Oven
Replaced 2 Mags,2Didodes and 2 Caps. Checked HV Transformes both are good. Self Test door test passes. F3 20A fuse is blowing. Need Help...
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Posted on Jan 02, 2017
SOURCE: F3 FUSE BLOWING
If this is a C3 there is only one mag, F3 is the inline heater circuit fuse,
so it is a problem with the heater circuit, the older type heaters are an open coil type the ceramic mouting points can crack and break causing a short as the heater starts to heat, they are also susceptible to damage from oven cleaners. 208 volt units usually draw approximately 23amps when operating properly
Posted on Apr 29, 2010
holy **** that was a very expencive fix huh. I hope you spent the 50 bucks and have a service manual. What about the diodes, have you tested or changed those. That looks like the last thing i would change and there only a few bucks so i would change them at this point anyway. Are you blowing a fuse at all.
You need to narrow the problem down, not just toss money into the toilet replacing good parts. If your reading 15.1 amps then you have no problem in the high voltage system. Unless the amps are ramping or erratic. Your I/O board is bad if its reading 15.1 and triggering an f-3 fault. You said you replaced it though. Contact who you purchased it from and see if they will help. Its a $420 board and $160 for each HV Transformer they should help. I would guess that your I/O board it bad. You also said you changed relays. Did you change the K2 relay.
Hope you can solve the problem quick. Hopefully this helps
Posted on Nov 05, 2010
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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Feb 05, 2011 | TurboChef TORNADO Electric Oven
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
Nov 03, 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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