68
temperature and the temperature differential is larger.
BROIL
When the Broil pad is touched, and a temperature is set
between 400 and 550 degrees F (usually 550 degrees),
the broil relay on the board closes, applying line to
neutral voltage to the oven broil circuit and “Broil” will
appear in the display. The broil circuit is a series circuit
made up of the electronic oven control, a silicon carbide
igniter that reduces in resistance as it heats up, and a
current sensitive oven safety valve that needs a minimum
of 3.2 amps of current to open. When electrical power is
first applied to the circuit the resistance of the igniter is
high enough that the current flow in the circuit is below
the amount needed to open the safety valve. As
electrical current flows through the igniter it causes the
silicon carbide material to heat, reducing the resistance
of the igniter and increasing the current flow in the circuit.
When the temperature of the igniter reaches around
1800 degrees F the current flow in the circuit exceeds 3.2
amps. The broil section of the safety valve opens
allowing gas to flow into the broil burner. The gas is then
ignited by the heat of the broil igniter and the oven begins
to heat up.
In the tip of the oven sensor is a positive coefficient
thermistor that increases in resistance as the oven
temperature increases. The microprocessor in the tip of
the oven sensor is a positive thermistor that increases in
resistance as the oven temperature increases. The
microprocessor reads the resistance of the oven sensor
and compares it with a programmed temperature set into
the control. The broil burner will cycle when the set
temperature is reached.
CLEAN
When the Clean pad is touched and a clean time is set
(and if the oven door is closed closing the contacts COM
to NO of the door switch), the door lock relay on the
electronic oven control closes providing line to neutral
voltage (120 VAC) to the lock motor. The lock motor
starts to rotate closing the contacts of the door lock
switch. When the motor rotates one half turn, the
contacts of the door lock switch reopen sending a signal
to the control telling it that the door is locked and to open
the contacts of the lock relay. The control then closes
the bake relay providing power to the bake circuit. The
clean temperature is preset into the control at around
860 degrees. It take about 45 minutes for the oven to
reach 860 degrees. When the temperature is reached
the control cycles the bake circuit off and on to maintain
the temperature until the clean time is completed. When
the clean time is completed, the control removes power
from the bake circuit and the oven cools down. When the
temperature in the oven goes below 500 degrees the
control closes the contacts of the lock relay. The lock
motor turns 180 degrees closing and reopening the
contacts of the lock switch and unlocking the door. The
open contacts of the lock switch tell the control that the
door is unlocked and to open the contacts of the lock
relay.
CALIBRATION
To check oven calibration
:
1. Place a thermometer or thermocouple in the center
of the oven.
2. Program the oven temperature for 350°F. Allow the
oven to cycle three times.
3. Average the highest and lowest reading. The average
should be within 10 degrees of 350°F.
To adjust the oven temperature higher:
1. Press the
Bake pad
for 6 seconds. “
0
” will appear
in the display.
2. To increase the temperature use the number pads to
enter the desired change. The temperature may be
increased up to 35°F.
3. Press
Start
to accept the temperature change
andthe display will return to the time of day. Press
Clear Off
to reject the change if necessary.
To adjust the oven temperature lower:
1. Press the
Bake pad
for 6 seconds. “
0
” will appear
in the display.
2. To decrease the temperature use the number pads
to enter the desired change and then press
Clean
.
The temperature may be decreased up to 35°F.
3. Press
Start
to accept the temperature change and
the display will return to the time of day. Press
Clear
Off
to reject the change if necessary.
TROUBLESHOOTING
The ES 400 has some self diagnostics built into the
microprocessor to help in troubleshooting the system.
When a failure occurs one of three codes will appear in
all the display windows: F1, F3, or F9.
F1 code:
F1 indicates a malfunction in the control itself, and the
control should be replaced.
Summary of Contents for 30" GAS FREESTANDING RANGES
Page 43: ...43 SAMPLE SCHEMATIC FOR ES100 CONTROL SYSTEM ...
Page 50: ...50 SAMPLE SCHEMATIC FOR ES 200 CONTROL SYSTEM ...
Page 60: ...60 SAMPLE SCHEMATIC FOR ES 300 CONTROL SYSTEM ...
Page 72: ...72 SAMPLE SCHEMATIC FOR ES 400 CONTROL SYSTEM ...
Page 84: ...84 SAMPLE SCHEMATIC FOR ES 450 CONTROL SYSTEM ...
Page 93: ...93 Sample schematic for 36 gas range ...
Page 130: ...130 NOTES ...
Page 131: ...131 NOTES ...
Page 132: ...132 ...
