Frigidaire ES 335 - User Manual

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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.

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

examples, but without limitation, of such practices.

1. Before servicing or moving an appliance remove power cord from

electrical outlet, trip circuit breaker to OFF, or remove fuse.

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

3. 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 safety hazard.

4. 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.

OVEN CALIBRATION

Set the electronic oven control for normal baking at 350°F. Obtain an

average oven temperature after a minimum of 5 cycles. Press STOP/

CLEAR to end bake mode.

p/n 316441741 (0611)

RTD SCALE

Temperature (°F) Resistance (ohms)

32 ± 1.9 1000 ± 4.0

75 ± 2.5 1091 ± 5.3

250 ± 4.4 1453 ± 8.9

350 ± 5.4 1654 ± 10.8

450 ± 6.9 1852 ± 13.5

550 ± 8.2 2047 ± 15.8

650 ± 9.6 2237 ± 18.5

900 ± 13.6 2697 ± 24.4

ELECTRONIC OVEN CONTROL FAULT CODE DESCRIPTIONS

ELECTRONIC OVEN CONTROL (E.O.C. Rear View)

IMPORTANT

DO NOT REMOVE THIS BAG

OR DESTROY THE CONTENTS

WIRING DIAGRAMS AND SERVICE

INFORMATION ENCLOSED

REPLACE CONTENTS IN BAG

TEMPERATURE ADJUSTMENT

1. Set EOC to bake at 550°F.

2. Within 5 seconds of setting 550°F, press and hold the bake pad for approximately

15 seconds until a single beep is heard (longer may cause F11 shorted keypad

alarm).

3. Calibration offset should appear in the display.

4. Use the slew keys to adjust the oven temperature up or down 35°F in 5°F

increments.

5. Once the desired (-35° to 35°) offset has been applied, press STOP/CLEAR.

Note: Changing calibration affects normal Bake mode. The adjustments made will not

change the Self-Cleaning cycle temperature.

COOKTOP LOCKOUT (some models)

For some models it may be necessary to unlock the cooktop before servicing.

If the Cooktop Locked Indicator Light is ON then the cooktop has been locked.

To turn the Cooktop Lockout Feature OFF:

1. BE SURE ALL GAS SURFACE BURNER CONTROLS ARE SET TO THE

OFF POSITION.

2. Press & hold

until one beep is heard (after 3 seconds). The

Cooktop Locked indicator light will turn OFF and the gas surface burners

may be used normally.

To turn the Cooktop Lockout Feature ON:

1. BE SURE ALL GAS SURFACE BURNER CONTROLS ARE SET TO THE

OFF POSITION.

2. Press & hold

until one beep is heard (after 3 seconds). The

Cooktop Locked indicator light will turn ON and the gas surface burners

and functions are locked out until the cooktop is unlocked.

RESISTANCE TEMPERATURE

DECTECTOR

E.O.C. CONTROL CONNECTIONS

CIRCUIT

ANALYSIS

MATRIX

P8 CONNECTIONS

(some models)

RTD TABLE

COOKTOP LOCKOUT CONTROL BOARD

(some models)

Suggested Corrective Action

Runaway Temperature.

Shorted Keypad.

Bad Micro Identification.

Bad EEPROM Identification/Checksum error.

Open probe circuit.

Shorted Probe circuit.

Cooktop Lockout Error.Cooktop lockout motor

failed to lock or unlock the valve.

NOTE: The valve lockout motor is very quiet.

Under normal conditions the motor can not be

heard when it is running.

Maximum oven door unlock time exceeded.

Maximum oven door unlock attempts exceeded.

Maximum oven door open time exceeded.

Maximum oven door lock time exceeded.

Maximum oven door lock attempts exceeded.

Likely Failure Condition/Cause

Fault Code

1. (F10 only) Check RTD Sensor Probe & harness. Replace if necessary.

If oven is overheating, disconnect power. If oven continues to overheat when the power is

reapplied, replace EOC. Severe overheating may require the entire oven to be replaced should

damage be extensive.

2. (F11, 12 & 13) Disconnect power, wait 30 seconds and reapply power.

3. (F11, 12 & 13) If fault returns upon power-up, replace EOC.

1. (F30 or F31) Check resistance at room temperature & compare to RTD Sensor resistance chart.

If resistance does not match the RTD chart replace RTD Sensor Probe. Check Sensor wiring

harness between EOC & Sensor Probe connector.

2. (F30 or F31) Check resistance at room temperature, if less than 500 ohms, replace RTD Sensor

Probe. Check for open or shorted Sensor Probe harness between EOC & Probe connector.

IF VALVE LOCKOUT MOTOR RUNS:

1.Test valve lock microswitch. If defective replace valve assembly

2. Test harness from valve lock microswitch to Cooktop Lockout Board and from Board to EOC.

Repair / Replace if defective

3. Replace Cooktop Lockout Board

4. Replace EOC

IF VALVE LOCKOUT MOTOR DOES NOT RUN:

1.Test valve lock motor windings. If open replace valve assembly

2.Test for line voltage to valve lock motor. If voltage is correct replace valve assembly.

3.Test harness from Cooktop Lockout Board to valve lock motor and from Cooktop Lockout Board

to EOC. Repair / Replace if defective.

4. Replace Cooktop Lockout Board.

5 Replace EOC.

IF LATCH MOTOR RUNS:

1. (F90, 91, 92, 93 & 94) Check the wiring between EOC & Lock Motor Micro Switch.

2. (F90, 91, 92, 93 & 94) Check the contacts of Micro-Switch on latch motor assembly.

If contacts are open when motor cam depresses switch, replace Lock Motor Assembly.

3. (F90, 91, 92, 93 & 94) Check for binding of the Latch Cam, Lock Motor Rod & Lock Motor Cam.

4. If all situations above do not solve probem, replace EOC.

IF LATCH MOTOR DOES NOT RUN

1. (F90, 91, 92, 93 & 94) Check to see if Lock Motor Coil is open. If open, replace Lock Motor

Assembly.

2. (F92, 93 & 94) Check oven door Light Switch - if open, replace Switch.

3. If all situations above do not solve probem, replace EOC.

F10

F11

F12

F13

F30

F31

F40 (some

models)

F90

F91

F92

F93

F94

** = some models.

SERVICE DATA SHEET

Gas Ranges with ES 330/335/340/345/355 Electronic Oven Controls (some models with Cooktop Lockout)

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This document describes an electronic oven control system, including its function, technical specifications, usage features, and maintenance.

Function Description

The electronic oven control manages various oven functions, including temperature regulation for baking and broiling, speed bake operations, and door locking mechanisms. It receives input from temperature probes, door switches, and igniter switches, and in turn controls oven valves, igniters, and the fan motor. The system is designed to provide precise temperature control and includes safety features such as automatic shut-off and error detection.

Important Technical Specifications

The control system operates with a range of temperature settings. For baking, the temperature can be adjusted in 5°F increments. The system includes a temperature probe for accurate readings. The igniter circuits are designed to operate within specific voltage and current parameters, ensuring proper ignition of the gas. The dual oven valve controls both bake and broil igniters. The fan motor is used for convection baking (Speed Bake) and cooling. The door lock motor is a safety feature that locks the oven door during high-temperature operations like self-cleaning.

Usage Features

Temperature Adjustment: The oven temperature can be adjusted in 5°F increments. For example, to adjust the temperature, press BAKE, enter the desired temperature, and then press START. If the temperature needs to be increased or decreased, press BAKE, then the UP or DOWN arrow, and then START. The control automatically shuts off if the temperature exceeds 550°F for bake or 900°F for broil.
Speed Bake: This feature utilizes convection for faster and more even baking.
Door Lock: The oven door can be manually locked or automatically locked during certain high-temperature operations.
Self-Cleaning Cycle: The control supports a self-cleaning cycle, during which the door is automatically locked.
Troubleshooting Codes: The control provides specific fault codes to assist in diagnosing issues. For example, F1 indicates a runaway temperature, F2 indicates a shorted temperature probe, F3 indicates an open temperature probe, F4 indicates a shorted probe circuit, F12 indicates a bad EEPROM identification/checksum error, and F13 indicates an open circuit. F40 and F41 indicate a shorted or open lock motor circuit, respectively.
Gas Valve Operation: The gas valve will not open if the door is open, if the door switch is defective, or if the lock motor is not in the locked position during a self-clean cycle. The bake igniter will not operate if the bake igniter circuit is open or if the bake igniter itself is defective. Similarly, the broil igniter has its own operational checks.

Maintenance Features

Troubleshooting Diagram: The document includes a detailed troubleshooting diagram that maps out the electrical connections and components within the oven control system. This diagram is crucial for diagnosing electrical issues.
Fault Code Analysis: A table of fault codes and their probable causes is provided to guide technicians in troubleshooting. For instance, an F1 code suggests a runaway temperature, which could be due to a shorted temperature probe or a faulty electronic oven control. An F2 code points to a shorted temperature probe, requiring replacement of the probe or the control board.
Component Replacement: The document outlines procedures for checking and replacing various components. For example, if an F1 code appears, the temperature probe should be checked for a short, and if it's good, the electronic oven control should be replaced. For F40/F41 codes, the lock motor circuit and the lock motor itself should be checked.
Wiring Integrity: It is emphasized that when replacing wiring, comparable wire and terminals with the same characteristics as the original must be used. All wires should be labeled prior to disconnection to prevent errors, which could lead to improper and dangerous operation. Proper operation must be verified after servicing.
Safety Precautions: The document includes a warning to disconnect power before servicing the unit to prevent electrical shock.
RTO (Resistance to Temperature Ohms) Table: This table provides resistance values for the temperature probe at various temperatures, which is essential for verifying the probe's functionality during troubleshooting. For example, at 75°F, the probe should have a resistance of 1090 ± 5.3 ohms, while at 900°F, it should be 2237 ± 18.5 ohms.
Circuit Analysis Matrix: This matrix helps in diagnosing issues related to specific oven functions by indicating which components are involved in each circuit (e.g., Bake/Time Bake, Broil, Self-Clean). For instance, a problem with the Bake/Time Bake function might involve checking the Bake Valve, Bake Igniter, and the Electronic Oven Control.