Electrolux EI27EW35PS, EW27EW55PS, EI30EW35PS, EW30EW55PS Wiring diagram

SERVICE DATA SHEET

IMPORTANT

DO NOT REMOVE THIS BAG

OR DESTROY THE CONTENTS

WIRING DIAGRAMS AND SERVICE

INFORMATION ENCLOSED

REPLACE CONTENTS IN BAG

Resistance (ohms)

1000 ± 4.0

1091 ± 5.3

1453 ± 8.9

1654 ± 10.8

1852 ± 13.5

2047 ± 15.8

2237 ± 18.5

2697 ± 24.4

Open circuit/infinite resistance

RTD SCALE

Temperature °F (°C)

32 ± 1.9 (0 ± 1.0)

75 ± 2.5 (24 ± 1.3)

250 ± 4.4 (121 ± 2.4)

350 ± 5.4 (177 ± 3.0)

450 ± 6.9 (232 ± 3.8)

550 ± 8.2 (288 ± 4.5)

650 ± 9.6 (343 ± 5.3)

900 ± 13.6 (482 ±7.5)

Probe circuit to case ground

Appliance with ES630 Electronic Oven Control

NOTICE: This service data sheet is intended for use by persons having electrical and mechanical training and a level of knowledge of these subjects generally considered acceptable in the

appliance repair trade. The manufacturer cannot be responsible, nor assume any liability, for injury or damage of any kind arising from the use of this data sheet.

IMPORTANT NOTE: This unit includes an EOC (electronic oven control). This board is not eld-repairable.

Safe Servicing Practices

To avoid the possibility of personal injury and/or property damage, it is important that safe servicing practices be observed. The following are some, but not all, examples of safe practices.

1. Do not attempt a product repair if you have any doubts as to your ability to complete it in a safe and satisfactory manner.

2. Before servicing or moving an appliance, remove power cord from electric outlet, trip circuit breaker to Off, or remove fuse.

3. Never interfere with the proper installation of any safety device.

4. Use only replacement parts specied for this appliance. Substitutions may not comply with safety standards set for home appliances.

5. Grounding: The standard color coding for safety ground wires is green or green with yellow stripes. Ground leads are not to be used as current carrying conductors. It is extremely
important that the service technician reestablish all safety grounds prior to completion of service. Failure to do so will create a potential hazard.

6. Prior to returning the product to service, ensure that:

• All electric connections are correct and secure.

• All electrical leads are properly dressed and secured away from sharp edges, high-temperature components, and moving parts.

• All uninsulated electrical terminals, connectors, heaters, etc. are adequately spaced away from all metal parts and panels.

• All safety grounds (both internal and external) are correctly and securely reassembled.

• All panels are properly and securely reassembled.

Oven Calibration

Set the electronic oven control for normal baking at 350°F. Allow oven to preheat to set temperature. Obtain an average oven temperature after a minimum of ve cycles. Press the STOP key
to end the Bake mode.

Temperature Adjustment

1. While in a non-cooking mode, press and hold the Bake key for 6 seconds.

2. The current calibration offset (temperature adjustment) should appear in the temperature display.

3. Use the number keys (0-9) to enter the desired amount of adjustments (up to 35°F).

4. Press the Self Clean key to change the sign of the adjustment to a (-), if necessary. A positive adjustment will not display a sign.

5. Once the desired adjustment (-35° to 35° F) has been entered, press the Start key to accept the change or the Cancel key to reject the change.

Note: Changing calibration affects all baking modes. The adjustments made will not change the self-cleaning temperature.

2-Speed Cooling Fan

The EOC controls the speed of the cooling fan. The cooling fan is activated at low speed during any cooking function and will remain on until the oven is cooled down. The high speed is

activated during the broil (with open door) and during clean cycles only when the temperature is above apporximately 575°F/302°C.

SINGLE WALL OVEN CIRCUIT ANALYSIS MATRIX

On Relay Board On Oven

Convection Fan

ELEMENTS

Door

BakeP9BroilP7Conv.

Bake X X X* X* X X
Keep Warm X X X
Broil X X X
Conv. Bake X X X X** X X X
Conv. Roast X X X X X X
Conv. Broil X X X X
Clean X X X X
Locking X
Locked
Unlocking X
Unlocked
Light X
Door Open X
Door Closed X
Bread Proof X X X X
Rack Supports not installed X

p/n 807436904 EN (Rev A 13/04)

P11

Motor

J3-5

Low

speed

J3-8

High

speed

J3-4

lights

control

board

Light

P2-1

On Display Board On Relay Board

Door

Switch
P10-3/

P10-5

Rack

Sense
Switch
P10-2/
P10-5

DLB

L2 out

P1

Cooling

Fan

J3-7

ELECTRONIC OVEN CONTROL (EOC) FAULT CODE DESCRIPTIONS

Note: Generally speaking “F1X” implies a control failure, “F3X” an oven probe problem, and “F9X” a latch motor problem.

Failure Code/ Condition/Cause Suggested Corrective Action

F10 Control has sensed a potential runaway oven

condition. Control may have shorted relay, RTD
sensor probe may have a gone bad.

F11 Shorted Key: a key has been detected as

pressed for a long period and will be considered
a shorted key alarm and will terminate all
oven activity.

F13 Control's internal checksum may have

become corrupted.

F14 Misconnected keyboard cable Verify connection between display board and touch panel (2 ribbon cables). Make sure the cables are well connected at both ends.

F15 Controller self check failed. Verify if relay board receives 120VAC between J4 pin 1 and 3.

F23 The controller failed to communicate with the

oven lights control board.

F30 Open RTD sensor probe/ wiring problem.
Note: EOC may initially display an "F10", thinking a

runaway condition exists.

F31 Shorted RTD sensor probe / wiring problem. Let the oven cool down and restart the function.

Note: F30 or F31 is displayed when oven is in active mode or an attempt to enter an active mode is made.

F43 The cooling fan speed, as read by the

tachometer input of the EOC-display board,

is abnormally too slow.

F44 The cooling fan speed, as read by the

tachometer input of the EOC- display board,

is abnormally too fast.

F90 Door motor mechanism failure. Press any key to clear the error.

Check RTD sensor probe and replace if necessary. If oven is overheating, disconnect power. If oven continues to overheat when
power is reapplied, replace relay board and/or display board.

Press any key to clear the error.

If fault returns, replace the keyboard (touch panel).

If the problem persists, replace the display board.

Press any key to clear the error.

Disconnect power, wait 30 seconds and reapply power. If fault returns upon power-up, replace display board.

If the cables are good, replace the touch panel.

If the problem persists, replace the display board.

Verify the wiring between J2 on the relay board and P16 on the display board.

If wiring and 120VAC supply is good replace the display board.

If problem persists replace the relay board.

Verify wiring between P2 on the display board and P2 on the oven lights control board.

If wiring is good, replace oven lights board.

If the problem persists, replace the display board.

Check wiring in probe circuit for possible open condition.

Check RTD resistance at room temperature (compare to probe resistance chart). If resistance does not match the chart, replace the RTD sensor probe.

If the problem persists, replace the display board.

Determine rst if the problem appears to be caused by a cooling fan not turning or turning slowly or by a problem with the sensing of
the fan speed. Start a Bake and check during the rst 15 seconds if the fan is turning (should feel air owing through the vent above

the upper oven door).

If the fan does not appear to be turning or turn slowly check the 120VAC at the fan. If 120VAC is present at the fan motor but the fan
does not turn replace the fan motor. If 120VAC is not present at the fan motor when a Bake is started check the connection to the
relay board (J3 pin 7) and Neutral: is there 120VAC on J3 pin 7? Does it reach the fan motor? Is the other terminal of the fan motor
connected to Neutral? If the harness or relay board are faulty replace them.

If the fan appears to be normally turning but an F43 error code is generated, it means there is a problem with the reading of the fan
speed sensor. Make sure the connection of the fan speed sensor is properly made (refer to wiring diagram), between the sensor on

the fan and the EOC- display board.

For trouble-shooting purposes, it is possible to enter a test mode that will indicate on the display the reading of the fan speed in RPM:
to enter the test mode, power-up the unit and within 30 seconds press and hold the upper oven Bake and Broil keys for 3 seconds

(until you see all segments in the screen illuminated). Once in the test mode, pressing the upper oven Light key once will display the

fan speed in RPM. In normal client mode the F43 error is generated for a fan speed below approximately 700 RPM.

Inspect the cooling fan. Does it appear to be turning normally (air ow, noise)? Verify the fan blade is well assembled.

Verify there is nothing blocking the air ow of the fan (that could make the fan turn faster).

Check the 120VAC voltage on the fan. A voltage higher than 120VAC + 10% could make it go too fast.

Make sure the connection of the fan speed sensor is properly made (refer to wiring diagram), between the sensor on the fan and the

EOC- display board.

For trouble-shooting purposes, it is possible to enter a test mode that will indicate on the display the reading of the fan speed in RPM: to enter
the test mode, power-up the unit and within 30 seconds press and hold the upper oven Bake and Broil keys for 3 seconds (until you see all

segments in the screen illuminated). Once in the test mode, pressing the upper oven Light key once will display the fan speed in RPM. In normal

client mode the F44 error is generated for a fan speed above approximately 2500 RPM.

If problem persists replace both the fan+sensor assembly and the EOC- display board.

I

f it does not eliminate the problem, turn off power for 30 seconds, then turn on power.

Check wiring of Lock Motor, Lock Switch and Door Switch circuits.

Unplug the lock motor from the board and apply power (L1) directly to the Lock Motor. If the motor does not rotate, replace Lock Motor Assembly.

Check Lock Switch for proper operation (do they open and close, check with ohmmeter). The Lock Motor may be powered as in above
step to open and close Lock Switch. If the Lock Switch is defective, replace Motor Lock Assembly.

If all above steps fail to correct situation, replace the display board and/or the relay board in the event of a motor that does not rotate.

If all the above steps fail to correct the situation, replace the display board in the event of a motor that rotates endlessly.

RELAY BOARD

P9 OUT

CONNECTS TO POWER SUPPLY

USER INTERFACE BOARD

J2 DC POWER TO UIB PCB

CONVECTION F

MDL

AN - HIGH SPEED

J3 OUTPUTS

F

T

CONNECTS TO UIB/PCB P13

CONNECTS TO J5

P13 AUX OUT

CONNECTS TO J6

P2 LIN COMM 1

CONNECTS TO TRIAC

P8 BACKLIGHT POWER

P10 SWITCH 1 OUT

P6 PROGRAMMING
HEADER

P7 EXT LEDS/KEY, RING LIGHTS,
PANEL BACKLIGHT CONTROL/POWER

P16 POWER IN CONNECTS TO J2

P3 TOUCH KEY INPUTS

GENERAL TROUBLESHOOTING SCHEMATIC

P18 MEAT PROBE

P1 TEMP PROBE

P8 P10P12 P2 P4

1

1

P7

BROIL

BAKE

CONV

P18

1

P3P11P9

L2 OUT

P1P17

1

L2 IN

1

P13

CLEAN CATALYST

P19

P15

L1 IN

P16

AN - HIGH

L1

NEUTRAL

CONVECTION FAN - LOW
COOLING FAN - LOW SPEED

COOLING F

SELF CLEAN CATALYST

J6 CONTROLS

AN, NIGHT LIGHT, AUX OUTU