TurboChef Eco Service Manual page 77

Energize the magnetron
circuit from Test Mode
(page 18). Are there 7+
amps present on the current
transformer wire, located on
the control board?
NO
YES
Run test cook cycles to see if
fault repeats (page 11). If not,
clear faults. Did fault repeat?
Remove and inspect the magnetrons
for discolored antennas or waveguide
contaminants. Were any defects found?
YES
Replace Reinstall all parts and
affected parts. place the oven back in
service.
Energize the magnetron circuit from
Test Mode (page 18) and test for
control voltage to the K2 anode relay.
Is 24 VDC present on pins C17, 18,
or 19; B-17; and C-14 on the control
board while energized?
Energize the magnetron circuit
Inspect/replace
from Test Mode (page 18) and
wiring between
test for control voltage on the
C-17, 18, or 19
K2 anode relay. Is 24 VDC
and C-14 of the
present on terminals A+B?
control board
and terminals
NO
A+B of the K8
relay.
Is voltage leaving the K2
anode relay on terminal 6?
F3: MAG CURR (Magnetron Current Low)
Is the oven International or U.S.?
YES
Confirm the F3 fuse is
a 15-amp ATMR fuse.
Is it open/blown?
NO
Are 7+
YES
amps
NO
present
during the
F3 fault
alarm?
YES
NO
Replace the I/O
control board (Sage).
NO
YES
Replace the K2 anode relay.
YES
Inspect/replace wiring between terminal 6 (K2) and
NO
T1-1 (HV transformer), T1-2 (HV transformer; US
YES
208 VAC or Intl.) or T1-3 (US 240V)
Troubleshooting:
Intl.
Inspect the oven for the following:
YES
• Check door switches and door alignment and
adjust if necessary. See page 35 for more details.
• Update the Phoenix firmware (contact factory).
• Check the wear on the hinges and replace if the
roller bearing is worn.
• Verify the door springs are in working order.
• Inspect the wire harness for cut insulation or
exposed wire that could be grounding out.
Is the issue still present?
NO
NO
Test the transformer (page 38). Is it
functioning properly?
YES
Test the capacitor (page 37).
Is it functioning properly?
YES
Test the high-voltage
diode (page 38). Is it
functioning properly?
Is the K6 mechanical
volt select relay in
U.S.
good working order?
YES
Replace K6 volt select relay.
Replace the F3 fuse and verify the
operation of the interlock switches
(page 37).
Is primary voltage present at the
transformer (page 38)?
NEVER TEST SECONDARY
VOLTAGES
YES
Replace the
NO
transformer.
Replace the
NO
capacitor.
Replace the
NO
high-voltage
diode.
Replace the
YES
magnetron.
49
NO