Lincoln FUSION TOASTER 2040 - Manual (Page 11)

Fusion Toaster Series Service Manual 11
there is no voltage to the solid state
relays, trace wiring back to the oven
control. If the wiring is intact and
plugged into the controller then
replace controller.
Solid State Relays Check for supply voltage to relays (5
VDC) on the low voltage signal side.
If voltage is present and contactor
does not open when heat is called
for then check to ensure that the “+”
and “-“ signal wires have been
connected to the proper terminals on
the relays. If the signal wires are not
correct, place them on the correct
terminal and heaters should
energize accordingly.
Heating Elements Check the current draw of each
power leg for proper load rating per
the specification plate rating and
operations manual. If the current
draw is outside of limits specified +/-
10% of rating then proceed to check
each individual element for a failed
condition (e.g. open, shorts, and
proper resistance). Check each
element to ensure that electrical
connection is proper (full torque on
lugs). To check resistance,
elements must be cool and power
disconnected from the elements
(remove all leads from elements and
use a digital multimeter to monitor
electrical resistance). Replace
elements as necessary.
Thermocouple With power on and thermocouple
attached to the oven control,
measure the DC millivolt output of
the thermocouple. Refer to the
thermocouple chart (located in the
“removal” section of the manual) for
proper millivolt readings. If readings
from the thermocouple do not match
chart in the manual then replace
thermocouple.
Thermocouple Check to ensure that the
thermocouple is properly secured
into the thermocouple well built into
the heater cartridge. If the
thermocouple is properly secured
into the well but the control indicates
a low temperature when the cavity is
hot then check to ensure that
thermocouple is in the proper
location on the control board and
securely seated in place. If the