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Low Profile – 1600-000-A Advantage Series Service Manual – Domestic
6
are no obstructions, replace gas control valves.
Hot Surface Igniter The ignition control will keep the gas control valves energized
for 6 seconds. At the end of 6 seconds, the hot surface igniter
must sense a flame, or, the ignition control will go into lockout.
(The ignition control requires a minimum of 0.8 microamps
D.C.) To check the flame sensing operation, connect a digital
multimeter (capable of measuring D.C. micro-amps) between
the "ground" terminal on ignition control and the ground lead.
NOTE: This is a current measurement and the meter must be
connected in series. If these readings are not achieved, check
bypass orifice for obstructions, if bypass orifice is clear,
replace the hot surface igniter.
NOTE: The D.C. micro amp test must be conducted with the
oven in low flame (bypass) operation. Turn the temperature
control to its lowest setting.
Power Supply If there is sufficient micro-amp current, but the flame will not
stay lit, check for proper polarity of the 120 VAC power supply
Ignition Control If there is sufficient micro-amp current, and the 120 VAC
polarity is correct, but the flame will not stay lit, replace the
ignition control.
NOTE: Check for proper ground connection of the ignition
control.
Flame will not stay lit
NOTE: Flame should
be lit at this time.
Temperature Control Check for 120 VAC at terminal #7 to neutral on temperature
control. If no voltage, trace voltage back to fuse holder. Turn
the temperature adjustment knob to maximum temperature
position and check for 120 VAC at the load terminal #8 and
neutral. If 120 VAC is present and unit is not heating, refer to
"Temperature Solenoid Valve" for next check. If 120 VAC is
not present, proceed.
Thermocouple Probe WITH POWER ON AND THERMOCOUPLE LEADS
ATTACHED TO THE TEMPERATURE CONTROL BOARD:
Measure the D.C. millivolt output of these leads. Refer to
thermocouple chart on page 17 for proper readings. If these
readings are not achieved, replace the thermocouple.
Temperature Set
Potentiometer
Disconnect the potentiometer leads Disconnect the pot from
the board. Place ohm meter test leads on the blue and green
pot leads. Reading should be 1 K ohms. Place meter leads
across the blue and purple pot leads and rotate knob from high
to low. Repeat on green and purple leads. Check for even
rise and fall of ohms reading to insure that there are no open
or dead spots in the potentiometer. Check each lead to
ground for shorts. Replace pot if it does not meet the above
test
Low flame is on, but
no main flame
Temperature Solenoid
Valve
If 120 VAC is present on the temperature control board at load
terminal #8 to neutral, check for voltage at temperature
regulation valve. If voltage is present, listen for valve to open
and close. Also check for opens or shorts in the coil. Replace
as necessary.