Frigidaire FGMC3065PB Wiring Diagram

Electronic Oven Control (EOC) Fault Code Descriptions

Code Condition / Cause Suggested Corrective Action

F10 Control has sensed a potential runaway oven condition,

control may have shorted relay, and/or RTD sensor probe may have gone bad.

Check RTD sensor probe and replace, if necessary. If oven is overheating, disconnect power. If oven continues to overheat when power is reapplied, replace the Electronic Oven Control (EOC).

F11 Shorted Key: A key has been detected as pressed (for a

long period). Will be considered a shorted key alarm and will terminate all oven activity.

1. Press STOP key.

2. If the problem persists, replace the EOC.

F13 Control’s internal checksum may be corrupted. • Press CLEAR key. - Disconnect power, wait 10 seconds, and reapply power. If fault

returns upon power-up, replace EOC.

F14 Misconnected ﬂ at cables. No communication between oven

and controls.

1. Disconnect power. Verify the ﬂ at cable connection between the touch panel or membrane and the EOC on P12 and P13.

2. If the problem persist, replace the EOC.

F30

F31

Open RTD sensor probe/ wiring problem. Note: EOC may initially display an “F10,” thinking a runaway condition exists. Shorted RTD sensor probe /wiring problem.

1. Check wiring in probe circuit for possible open or short condition.

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

3. Let the oven cool down and restart the function.

4. If the problem persists, replace the EOC.

F90

F94

Door motor mechanism failure.

1. Turn off power for 10 seconds, then turn on power. Test the door latch again (try to start a Clean cycle).

2. If it fails, check wiring of Lock Motor, Lock Switch and Door Switch circuits.

3. 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.

4. Check Lock Switch for proper operation (do the contacts 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.

5. If all above steps fail to correct situation, replace the EOC.

Note: Generally speaking, F1X implies a control failure, F3X an oven probe problem, and F9x a latch motor problem.

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 ﬁ 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 speciﬁ 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.

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

807574801 EN Rev A (13/05)

SERVICE DATA SHEET - Microwave Combination Unit with ES525/530 Electronic Oven Control

GROUNDING INSTRUCTIONS This oven is equipped with a three prong grounding plug. It must be plugged into the wall oven receptacle that is properly installed and grounded in accordance with the National Electrical Code and local codes and ordinances. In the event of an electrical short circuit, grounding reduces the risk of electric shock by providing an escape wire for the electric current.

WARNING: Improper use of the grounding plug can result in a risk of electric shock.

Electrical Requirements The electrical requirements are a 120 volt 60 Hz, AC only, a branch circuit protection fuse, 20 amp is provided in series with the ac outlet on top of the wall oven support.

*Note: Branch circuit fuse 20 amp shall be replaced with class cc type.

OVEN CIRCUIT

ANALYSIS

MATRIX

On Relay Board On Display

Board

ELEMENTS

Oven Light

J3-3

Conv. Fan

J3-5

Door Motor

J3-4

Cooling Fan Low

Speed J3-2

Cooling Fan High

Speed J3-1

DLB L2

Out P1Bake P9 Broil P7 Conv. P11

Door Switch

P11-4 / P11-3 Preheat X X X X X X X

Bake X X X* X* X X X

Broil X X X X

Convection Bake X X X X X X X Convection Roast X X X X X X X Convection Broil X X X X X Clean X X X X X Locking / Unlocking X Light X Door Open X Door Closed X * Convection element and fan are used for the ﬁ rst rise of temperature. Relay will operate in this condition only

K11 K14 K16 K18

K7 K5 K3

DOOR SENSING AND PRIMARY INTERLOCK SWITCHES The primary interlock switch is mounted in the lower position of the latch hook and the door sensing switch in the secondary interlock system is mounted in the upper position of the latch hook. They are activated by the latch heads on the door. When the door is opened, the switches interrupt the power to all high voltage components. A cook cycle cannot take place until the door is ﬁ rmly closed thereby activating both interlock switches. The secondary interlock system consists of the door sensing switch and secondary interlock relay located on the control circuit board.

MONITOR SWITCH The monitor switch is activated (the contacts opened) by the latch head on the door while the door is closed. The switch is intended to render the oven inoperative, by means of blowing the monitor fuse, when the contacts of the secondary interlock relay (RY2) and primary interlock switch fail to open when the door is opened.

Functions:

1. When the door is opened, the monitor switch contact close (to the ON condition) due to their being normally closed. At this time the secondary interlock relay (RY2) and primary interlock switch are in the OFF condition (contacts open) due to their being normally open contact switches.

2. As the door goes to a closed position, the monitor switch contacts are ﬁ rst opened and then the door sensing switch and the primary interlock switch contacts close. (On opening the door, each of these switches operate inversely.)

3. If the door is opened, and the secondary interlock relay (RY2) and primary interlock switch contacts fail to open, the monitor fuse blows simultaneously with closing of the monitor switch contacts.

CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE TEST THE DOOR SENSING SWITCH, SECONDARY INTERLOCK RELAY (RY2), RELAY (RY1), PRIMARY INTERLOCK SWITCH AND MONITOR SWITCH FOR PROPER OPERATION. (REFER TO CHAPTER «TEST PROCEDURE»).

NOTE: MONITOR FUSE AND MONITOR SWITCH ARE REPLACED AS AN ASSEMBLY.

CAVITY TEMPERATURE FUSE The cavity temperature fuse located on the top of the oven cavity, is designed to prevent damage to the oven by ﬁ re. If the food load is overcooked, by either error in cook time or defect in the control unit, the cavity temperature fuse will open.

Under normal operation, the cavity temperature fuse remains closed. However, when abnormally high temperatures are reached within the oven cavity, the cavity temperature fuse will open at 302OF(150OC) causing the oven to shut down.

NOTE: This is fuse. It does not reset.

MONITOR FUSE

1. The monitor fuse blows when the contacts (COM-NO) of the primary interlock relay (RY2) and secondary interlock switch remain closed with the oven door open and when the monitor switch closes.

2. If the wire harness or electrical components are short-circuited, this monitor fuse blows to prevent an electric shock or ﬁ re hazard.

MAGNETRON TEMPERATURE FUSE

The magnetron temperature fuse located near the magnetron is designed to prevent damage to the magnetron if an over heated condition develops in the tube due to cooling fan failure, obstructed air guide, dirty or blocked air intake, etc.

Under normal operation, the magnetron temperature fuse remains closed. However, when abnormally high temperatures are reached within the magnetron, the magnetron temperature fuse will open at 302°F(150°C) causing the oven to shut down.

NOTE: This is a fuse. It does not reset.

Data Sheet Abbreviations and Terminology

DLB - Double Line Break EOC - Electronic Oven Control LED - Light-Emitting Diode MDL - Motor Door Latch PS - Power supply board (PS1, PS2,

etc)

RTD - Resistance Temperature Detector/Oven Probe

TCO - Thermal cut out, also “thermo disc” or “thermal limiter”

VSC - Variable Speed Control

J3. Relay Outputs : Convection Fan, Motor Door Latch, Oven Light, Cooling Fan. Power Input (L1 and Neutral).

P11. Door switch, Motor Door Latch Switch and Oven Probe Inputs.

P1. L2 Out P3. L2 In P5. L1 Input P7. Broil Connector P9. Bake Connector P11. Convection Element Connector P15. L1 Input

P15

P11

P3 P17

P11

GENERAL TROUBLESHOOTING SCHEMATIC - OVEN

GRN

GENERAL TROUBLESHOOTING SCHEMATIC - MICROWAVE

GRN

COM.

RED

Note:* Indicates component

ORG

BRN

N.O.

ORG

FUSE

TEMPERATURE

MAGNETRON

RED

FUSE

TEMPERATURE

SCHEMATIC

NOTE: CONDITION OF OVEN

CAVITY

2. CLOCK APPEARS ON DISPLAY

1. Door Closed

DOOR

POWER

SENSING

RED

BLK

TRANSFORMER

SWITCH

HUMIDITY

PNK

MAGNETRON

HIGH

VOLTAGE

CAPACITOR

LAMP

RECTIFIER

xx µF

WHT WHT

N.C.

COM.

WHT WHT

MONITOR

SWITCH

FAN

MOTOR

WHT

ORG

TURN

TABL E

MOTOR

WHT

BRN

TTM

OVEN

LAMP

ORG

RELAY

WHT

NOISE

WHT

N.O.

PRIMARY

INTERLOCK

SWITCH

COM.

GRY

WHT

GRY

Figure O-1 Oven Schematic - Off Condition

GRY

"TO LOAD"

FILTER

"TO SOURCE"

4. POWER TRANSFORMER TOP (FINISH LEAD) TERMINAL MUST BE CONNECTED TO THE NEUTRAL (WHT) WIRE.

NOTES:

1.CIRCUITS SUBJECT TO CHANGE WITHOUT NOTICE.

2. TERMINAL WITH PROJECTION OR OPPOSITE BLUE MARK ON LAMP SOCKET

MUST BE CONNECTED TO NEUTRAL WIRE.

3. ONLY CERTAIN MODELS USE THE ABSOLUTE HUMIDITY SENSOR.

SCHEMATIC

NOTE: CONDITION OF OVEN

2. COOKING TIME PROGRAMMED

1. DOOR CLOSED

4. "START" PAD TOUCHED

3. VARIABLE COOKING CONTROL "HIGH"

RED

ORG

TURE

FUSE

TEMPERA

MAGNETRON

RED

TURE

FUSE

TEMPE

RED

SENSOR

(RY2)

"TO LOAD"

"TO SOURCE"

HIGH

VOLTAGE

CONTROL UNIT

SECONDARY

INTERLOCK

RELAY

COM.

(RY1)

OVEN

N.O.

FUSE (20A)

MONITOR

GND

GRN

120VAC

60Hz

MAGNETRON

HIGH

VOLTAGE

POWER

TRANSFORMER

HIGH

VOLTAGE

RED

GRN

DOOR

SENSING

SWITCH

SENSOR

HUMIDITY

PNK

GRN

COM.

RED

ORG

BRN

N.O.

RED

BLK

(RY2)

"TO LOAD"

"TO SOURCE"

CONTROL UNIT

SECONDARY

INTERLOCK

RELAY

COM.

(RY1)

OVEN

N.O.

FUSE (20A)

MONITOR

GND

GRN

120VAC

60Hz

CAPACITOR

LAMP

RECTIFIER

xx µF

WHT WHT

N.C.

COM.

WHT WHT

MONITOR

SWITCH

FAN

MOTOR

WHT

ORG

TURN

TABLE

MOTOR

WHT

BRN

TTM

OVEN

LAMP

ORG

RELAY

WHT

NOISE

WHT

N.O.

PRIMARY

INTERLOCK

SWITCH

COM.

GRY

WHT

GRY

Figure O-2 Oven Schematic - Cooking Condition

GRY

"TO LOAD"

FILTER

"TO SOURCE"

4. POWER TRANSFORMER TOP (FINISH LEAD) TERMINAL MUST BE CONNECTED TO THE NEUTRAL (WHT) WIRE.

NOTES:

1.CIRCUITS SUBJECT TO CHANGE WITHOUT NOTICE.

2. TERMINAL WITH PROJECTION OR OPPOSITE BLUE MARK ON LAMP SOCKET

MUST BE CONNECTED TO NEUTRAL WIRE.

3. ONLY CERTAIN MODELS USE THE ABSOLUTE HUMIDITY SENSOR.

RED

CN-F

AH SENSOR

BLK

RED

2 3

WHT

BLK

GRY

ORG

OVEN LAMP AND SOCKET

MAGNETRON TEMP FUSE

GRY

RED

B-

RY2

N.O.

GRY

WHT

(

COM.

)TIN

ADN

ORG

N.C.

RED

MONITOR

PRIMARY SWITCH

COM.

SWITCH

WHT

RED

WHT

COM.

GRY

WHT

CAVITY TEMP. FUSE

RED

BLK

NOTE:

RED

The neutral (WHT/GRY) wire must be connected to the terminal with "N" mark on the power supply cord.

WHT

RED

NOTE: The grounding conductor of the power supply cord has been grounded by power supply cord fixing screw. The screw must always be kept tight.

POWER SUPPLY CORD 120V 60Hz

ORG

FAN MOTOR

HIGH VOLTAGE COMPONENTS

MAGNETRON

WHT

POWER TRANSFORMER

to Oven cavity

GRN

PNK

CN-B

HIGH VOLTAGE WIRE A

GRN

TURNTABLE MOTOR

WHT

H.V. RECTIFIER

DOOR SENSING SWITCH

COM.

BRN

HIGH VOLTAGE CAPACITOR

N.O.

PNK

GRN

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