TurboChef Technologies Residential Single and Double Wall Oven - Manual (Page 78)

6.14 TROUBLESHOOTING
NOTE: Line voltage is routed to the bottom oven
from the terminal block in the upper electrical
compartment. Brown, blue, and white wires will
be traveling together on the far left side of the oven
frame.
4. Verify that no amperage is being drawn to the
elements. If any amperage is present, the K13
relay is functioning because it is the single
source of L2 voltage to all three elements.
Th
erefore, testing should begin with L1 voltage
reaching the elements.
5. Check the high limit switch in the lower
electrical compartment to see if it tripped.
If so, press the red button to reset the switch.
6. Use the amp-meter on the brown wire in the
upper electrical compartment again to verify
the elements are drawing current.
7. If the oven is still not heating, test for which leg
of power is not reaching the elements.
8. Turn the oven mode dial to off , then access the
K13 relay behind the right side lower electrical
compartment access panel.
Testing for Control Voltage to the K11 SSR
1. Turn the oven mode dial to Broil.
2. For Gen 1 ovens, apply the voltmeter probes to
P9-2 and P9-15, then to P9-2 and P9-16 (of the
control board). For Gen 2 ovens, apply
voltmeter probes to terminals RBJ17-5 and
RBJ17-2, then RBJ17-5 and RBJ17-1 (on the
relay board). Th
e voltage reading for each should
be 24 VDC.
Testing for Control Voltage to the K12 SSR
1. Turn the oven mode dial to Bake to begin the
preheat
cycle.
2. For Gen 1 ovens, apply the voltmeter probes to
P9-3 and P9-13, then to P9-3 and P9-14 (of the
control board). For Gen 2 ovens, apply
voltmeter probes to terminals RBJ17-5 and
RBJ17-3, then RBJ17-5 and RBJ17-4 (on the
relay board). Th
e voltage reading for each should
be 24 VDC.
When the oven mode dial is turned to any of the
seven cooking settings, the control board sends
voltage to activate the relays, which supply power to
the heating elements. L1 voltage for the bake and
convection elements are supplied through the K11
SSR and the L1 voltage for the inner and outer broil
elements is supplied through the K12 SSR. Th
e L2
voltage for all three elements is supplied from the
N.O. contact on the K13 relay.
If the oven is not heating normally, use the below
troubleshooting option that best describes the
situation.
Th is section contains information on the following
topics:
- Lower oven heating element specifi cations
- No heat/slow to heat
- Testing for voltage to activate the K11 SSR
- Testing for voltage to activate the K12 SSR
- Testing for a K11 SSR that is stuck open
- Testing for a K12 SSR that is stuck open
- Testing for a K13 relay that is stuck open
Lower Oven Heating Element Specifi cations
Element Amps at
208 volts Amps at
240 volts Ohms at
208 volts Ohms at
240 volts
Bake 12.8 11.0 15.4 20.5
Convection 7.4 6.5 26.5 34.5
Inner broil 9.7 9.0 20.0 25.5
Outer broil 5.2 4.6 36.5 49.5
NOTE: If the bake or convection element are not
activating, test for voltage to activate the K11 SSR.
If the inner or outer broil elements are not
activating, test for voltage to activate the K12 SSR.
No Heat/Slow to Heat
1. Turn the oven mode dial to Bake to begin
preheating.
Th e oven should immediately make
an audible ‘click’ when the K13 relay closes.
2. After 2-3 minutes, the oven should heat
noticeably. If no heat is present, pull the oven
11” (280 mm) from the cabinet to access the
front half of the upper electrical compartment
and the left and right lower electrical
compartment access panels.
3. Using an amp-meter, test the brown wire on the
left side of the upper electrical compartment.