27
Service Manual for Electric Convection Oven
ELEMENT
Check the Element by measuring the resistance
between the two wires of the Element. To access
the Element follow the procedure described in the
ELEMENT REPLACEMENT SECTION.
Connect an ohmmeter across the Element leads and
verify that the resistance is as follows:
6/13 and E Series ovens.
Operating
Voltage
Element
Part Number
Resistance
208 153102 12 ohms
240 153103 18 ohms
480 153104 70 ohms
5/9 ovens.
Operating
Voltage
Element
Part Number
Resistance
208 155076, 75 and 74 16 ohms
240 155079, 78 and 77 21 ohms
1. Replace Element if defective.
RTD
Check the RTD by measuring the resistance
between the two lead wires. To access the
RTD, follow the procedure described in the RTD
REPLACEMENT SECTION.
1. Tag and disconnect the RTD wires from the control
board.
2. Connect an ohmmeter across the RTD leads and
verify that the resistance is approximately 1000
ohms at ambient room temperature.
3. Replace RTD if defective.
MOTOR CIRCUIT CHECK
The Motor should be operating the Fan any time
the Heaters are turned on and the FAN Switch is
in the ON position. The Blower should be turning
counterclockwise.
WARNING: DISCONNECT OVEN FROM POWER
SOURCE BEFORE PERFORMING
ANY SERVICE.
1. Turn POWER Switch to OFF position and FAN
Switch to OFF position.
2. Remove cover over Motor Junction Box.
3. Locate yellow/black wire connection and brown
wire connection.
4. Connect voltmeter to these terminals.
WARNING: CIRCUIT IS ENERGIZED AFTER
NEXT STEP.
5. Turn POWER Switch to COOK postion.
6. Set FAN Switch to ON positon.
7. Check voltmeter reading. Reading should be the
same as input power source.
8. If no voltage is measured, check voltage at POWER
Switch and at FAN Switch.
9. If voltage is present and Motor is not operating,
replace Motor.
10. If Motor operates check direction of rotation.
11. Turn POWER Switch to OFF postion.
12. Install cover over Motor Junction Box.
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