Electrolux CEI30EF5GB, Service Manual

Page 24

VARIABLE SPEED CONTROL

To achieve optimum cooking results during convection cooking the fan motor speed can be varied. 

The EOC will signal the VSC board to speed up or slow down the fan as needed. This speed change 

takes place automatically with no action required by the consumer. 

The Variable Speed Control (VSC) board operates the Convection Fan as well as the Oven 

LUXURY™ lighting. In the event that either of these features do not operate properly the VSC board 

should be examined as a possible source of failure. When testing for convection fan operation it 

should be noted that on gas ranges there is a six minute delay from the start of the convection 

cooking cycle until the fan motor will run. 

Variable Fan Speed

The VSC Board is located on the rear of the range 

just below the power supply boards,  as seen 

in photo A. The board varies the voltage to the 

convection fan motor as directed by the EOC to 

alter the motor speed. The speed control signal and 

the power supply to operate the VSC board come 

from the EOC through a wiring harness connected 

between P2 on the EOC  and P1 on the VSC board. 

This harness must be intact and properly connected 

for the VSC board to operate. If the harness is 

defective or not properly connected the EOC will 

display a fault code F23. 

When testing the VSC board the power supply from 

the EOC to the board can be verified by measuring 

the voltage between pins 1 & 6 (the two outside pins) 

on connector P6 of the VSC board. This connector is 

not wired in field applications and the pins are easily 

accessed to test voltage while the other harness 

connectors are in place and power is applied to 

the range. Test for approximately 5 volts DC (+/- 

.5 volt) on these two pins. If the EOC appears to 

operate normally but the voltage to the VSC board is 

incorrect or if there is no voltage present inspect and 

test the wire harness and connectors between the 

EOC and VSC board. If the harness is good then the 

EOC is defective and should be replaced. 

P6

P2

Photo B

P1

Pin 1

Pin 6

If the convection fan motor fails to run test for voltage to the convection fan motor. If no voltage is 

present then the failure is either in the VSC board, EOC , or the wiring in between. If there is proper 

voltage to the fan motor but it does not run then either the motor windings are open or the motor is 

stuck. Test the continuity of the motor windings with an ohm meter. There should be approximately 

15 ohms of resistance in the convection fan motor windings. If the windings test good inspect the fan 

blade and motor shaft to see if the motor will turn. Adjust the fan blade to eliminate binding or replace 

the motor assembly if the motor shaft is seized. 

Photo A

VSC Board