tech-sheet-16023334
Technical Information Double Oven Gas Range

! WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.

MGR6875ADB/Q/S/W

Due to possibility of personal injury or property damage, always contact an authorized technician for servicing or repairing this unit.

Refer to Service Manual 16023415 for detailed installation, operating, testing, troubleshooting, and disassembly instructions.

! CAUTION

All safety information must be followed as provided in Service Manual 16023415.

! WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.

Illustration Component Test Procedure Results Autolatch assembly Disconnect wires and test for See wiring diagram for schematic layout. Broil with switch continuity per wiring diagram. Access assembly by removing left side Bake panel. Temperature sensor Refer to Parts Manual for correct H2 Controlled Ignitor autolatch switch associated with the Approximately 1100 at room correct manufacturing number. temperature 75°F. H2 Controlled Oven temperature Measure resistances………………………. 120 VAC adjustment (Upper 3.2 3.6 Amps. If not, replace. Oven) Test for voltage at terminals…………….. Test for the amount of amperage in the While increasing or decreasing oven Oven temperature circuit …………………………………………… temperature, this does not affect self- adjustment (Lower (Ignitor may glow but not have cleaning temperature. Oven) sufficient amperage to open valve). Press Upper Bake pad. While increasing or decreasing oven Enter 550 on the digit-pad. temperature, this does not affect self- Immediately press and hold Upper cleaning temperature. Bake pad for 3 seconds. Oven can be adjusted from -35 to +35 degrees in 5-degree increments by pressing Autoset pad. To avoid over adjusting the oven, move temperature 5 degrees each time. Wait 4 seconds for the data entry timer to expire to accept the change. Temperature adjustment will be retained even through a power failure. Press Lower Bake pad. Enter 550 on the digit-pad. Immediately press and hold Lower Bake pad for 3 seconds. Oven can be adjusted from -35 to +35 degrees in 5-degree increments by pressing Autoset pad. To avoid over adjusting the oven, move temperature 5 degrees each time. Wait 4 seconds for the data entry timer to expire to accept the change. Temperature adjustment will be retained even through a power failure.

July 2004 1 8126P034-60 16023334 ©2004 Maytag Services

Technical Information Double Oven Gas Range

! WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.

Illustration Component Test Procedure Results Press and hold Upper Cancel and This mode enables the user to indicate °F H2 Controlled Temperature display Upper Bake pads for 3 seconds. or °C on the display. Press and hold Upper Cancel and Allows clock to be toggled On or OFF. H2 Controlled Clock Display Clock pads for 3 seconds. H2 Controlled 24 Hour Clock Press and hold Upper Cancel and Allows the time on the clock to be toggled H2 Controlled Factory Default Favorite pads for 3 seconds. from 12 hour or 24 hour display. H2 Controlled Twelve hour off Press and hold Upper Cancel and Allows the clock to be reset to factory Upper Keep Warm pads for 3 seconds. settings. Control will automatically cancel any See Sabbath mode to disable. cooking operation and remove all relay H2 Controlled Sabbath Mode drives 12 hours after the last pad touch. “SAbbAth” will display for 5 seconds, then Hold Clock pad for 3 to 5 seconds to change to “SAb” (displayed in Temp area). H2 Controlled Beeper Volume activate Sabbath mode. All pad inputs are disabled except for H2 Controlled Child lock out CANCEL and CLOCK pads. Hold Clock pad for 3 to 5 seconds to This mode disables the normal 12 hour disable Sabbath mode. shutoff to allow operation of the bake mode for a maximum of 72 hours. Hold Upper Cancel and Delay pads for 3 seconds to adjust beeper loudness. Volume settings are Low, Medium and Press and hold Upper Cancel and Cook High. & Hold pads for 3 seconds. “OFF” will display where the temperature normally This is a safety feature that can be used to appears. “LOCK” will display flashing prevent children from accidentally while door is locking. programming the oven. It disables the To reactivate the control, press and hold electronic oven control. Cancel and Cook & Hold for 3 seconds. H2 Controlled Diagnostic Code Display Press and hold Upper Cancel and Child lockout features must be reset after a Control Panel Assembly Autoset pads for 3 seconds. power failure. See “Quick Test Mode.” Cycle through the codes using the The last 5 diagnostic codes will be stored in number pads 1 through 5. the non-volatile memory. Continuity is indicated as follows: See “Description of Error Codes” for 1000 – 6600 for Cancel pad 1000 – 10000 for All other pads explanation.

18 Pad Trace Measurement

11 1 14 & 16 Continuity

10 2 17 & 16 Continuity

1 3 16 & 8 Continuity

2 4 7 & 6 Continuity

5 8 & 17 Continuity

6 7 & 14 Continuity

7 6 & 15 Continuity

8 5 & 14 Continuity

9 6 & 14 Continuity

0 8 & 14 Continuity

Lower Cancel 1 & 2 Continuity

Upper Cancel 11 & 12 Continuity

Conv Bake 4 & 15 Continuity

Delay 5 & 6 Continuity

Clock 5 & 16 Continuity

Favorite 5 & 7 Continuity

Lower Clean 5 & 15 Continuity

Upper Clean 7 & 16 Continuity

Lower Bake 8 & 15 Continuity

Lower Light 7 & 15 Continuity

Upper Keep Warm 7 & 17 Continuity

Upper Light 15 & 16 Continuity

Autoset 14 & 17 Continuity

Lower Keep Warm 8 & 16 Continuity

Conv Roast 5 & 4 Continuity

Upper Bake 4 & 14 Continuity

Timer 2 4 & 7 Continuity

Cook & Hold 6 & 16 Continuity

Upper Broil 14 & 15 Continuity

Timer 1 4 & 16 Continuity

8126P034-60 July 2004 16023334 ©2004 Maytag Services

Technical Information Double Oven Gas Range

! WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.

Relay Logic Note: Subsequent changes implemented after the release of this technical sheet may have altered the parameters identified in this chart.

COOKING MODE BAKE IDLE BROIL BAKE PREHEAT CONVECT ELEMENT BAKE CONVECT FAN BROIL PREHEAT OVEN LIGHT BROIL CLEAN PREHEAT r rr rr rr CLEAN r r rr rr KEEP WARM r rr rr r CONVECT BAKE PREHEAT CONVECT BAKE r rr rr r CONVECT ROAST PREHEAT r r CONVECT ROAST r r PROOFING PREHEAT rr rr rr PROOFING rr rr DRYING PREHEAT DRYING

INDEX

– OFF – CYCLING – ON OR OFF (DETERMINED BY USER INPUT)

July 2004 3 8126P034-60 16023334 ©2004 Maytag Services

Technical Information Double Oven Gas Range

! WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.

“Quick Test” Mode for Electronic Range Control

Follow the procedure below to perform the Electronic Range Control (ERC) quick test. Instructions must be entered within 32 seconds of each other (via the touch pad) or the ERC will exit the quick test. 1. Press and hold the UPPER CANCEL and BROIL pads for 3 seconds. 2. Once the control has entered the “Quick Test” mode, release both pads. 3. Press each of the following pads indicated in the table below.

NOTE: Press the applicable pad once to activate the associated response. Press the applicable pad a second time to deactivate the associated response.

Display will indicate the following:

Pad Response

BAKE …………………………….. Bake DLB and Bake relay activated

BROIL……………………………. Broil DLB and Broil relay activated

KEEP WARM …………………. Bake DLB and Broil DLB activated

CONVECT BAKE ……………. Convection Fan on low speed

CONVECT ROAST …………. Convection Fan on high speed

CLEAN…………………………… MDL relay activated

COOK & HOLD……………….. Displays last diagnostic code

FAVORITE……………………… Displays EEPROM version number

TIMER …………………………… Displays main code version number

CLOCK ………………………….. All display segments illuminated

OVEN LIGHT………………….. Oven light activated

CANCEL ………………………… Exit Quick Test mode

1……………………………………. Even segments on

2……………………………………. Odd segments on

3……………………………………. Convection Ring activated; Convection Ring DLB activated

4……………………………………. N/A

5……………………………………. N/A

6……………………………………. N/A

7……………………………………. N/A

8……………………………………. N/A

9……………………………………. N/A

AUTOSET………………………. Steps through last 5 diagnostic codes

Description of Error Codes

The Diagnostic Code Display Mode allows viewing of the error diagnostic codes. Each error code consists of four digits. The following table describes the function of each digit.

Digit Description 1st Primary System: 1 – Local to the control circuit board 2nd 3rd 3 – Sensor or meat probe 4th 4 – Control input

9 – Door lock

Measurable: d – Diagnostic: measurable parameter

c – Control related, replace control

Secondary System: Sequential numbering

Oven Cavity: 1 – Upper oven (or single cavity oven)

2 – Lower oven

c – Control specific

Diagnostic Code Display Mode may be activated by pressing and holding the AUTOSET pad for 3 seconds at power-up. Diagnostic Code Display Mode may be entered only when applying power to the control.

8126P034-60 4 July 2004 16023334 ©2004 Maytag Services

Technical Information Double Oven Gas Range

! WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.

Diagnostic Code Checking

Code Description When Checked Detection

1c1c Shorted key Always 1 minute Always 1 minute 1c2c Keyboard tail disconnected Always 20 seconds Always 20 seconds 1c31 Cancel key circuit problem When accessing EEPROM Always 3 tries 1c32 Cancel key circuit problem Cook or clean programmed 3 tries Latch unlocked 3 tries 1c6c EEPROM error 1 minute Latch unlocked 1c7c Control not calibrated 1 minute Latch locked 1c8c Cooking program error 1 minute Latch locked 1d11 Runaway temp (650°F), door unlocked 1 minute Cook or clean active 1d12 Runaway temp (650°F), door unlocked Cook or clean active 20 seconds Cook or clean active 20 seconds 1d21 Runaway temp (950°F), door locked Cook or clean active 20 seconds Clean or keyboard Lockout active 20 seconds 1d22 Runaway temp (950°F), door locked Clean or keyboard Lockout active Clean or Cook programmed 1 minute 3d11 Sensor open Suppose to be OFF 1 minute Convect, Clean or Keyboard Lockout programmed 1 minute 3d12 Sensor open Convect, Clean or Keyboard Lockout programmed 1 minute Latch should be locked 1 minute 3d21 Sensor shorted Latch should be locked 1 minute Latch should be unlocked See Note 6 3d22 Sensor shorted Latch should be unlocked See Note 6 Latch should be locked or when lock attempted See Note 6 4d11 Door switch position failure Latch should be locked or when lock attempted See Note 6 See Note 6 4d12 Door switch position failure See Note 6

4d21 No reverse airflow fan rotation (no/low RPM)

4d31 Reverse airflow fan state (on when should be off)

4d51 Door switch circuit failure

4d52 Door switch circuit failure

9d11 Latch will not lock

9d12 Latch will not lock

9d21 Latch will not unlock

9d22 Latch will not unlock

9d31 Latch state unknown, both locked and unlocked

9d32 Latch state unknown, both locked and unlocked

Diagnostic Code Handling

Code Measurable What is Displayed Action Taken By Control

1c1c Keypress Nothing Disables audible for affected key depression Disables all outputs 1, 2 1c2c Keyboard loop improper value Nothing Disables lights and timers Disables audible for key depression 1c31 Cancel key improper value BAKE flashes 3 Disables all outputs 1 1c32 Cancel key improper value BAKE flashes 3 Disables lights and timers 1c6c No response from EEPROM Disables all outputs for cavity 1 1c7c Calibration value out of range Nothing Disables all outputs for cavity 1 1c8c CRC invalid “CAL” in the time digits Disables all outputs 1 1d11 Sensor resistance > 2237 Completely disables oven 4 Sensor resistance > 2237 Nothing Cancels active cook function 1d12 Sensor resistance > 2787 BAKE flashes 3 Disables all cook function for cavity Sensor resistance > 2787 BAKE flashes 3 1d21 Sensor resistance > Infinite BAKE flashes 3 Disables all cook function for cavity Sensor resistance > Infinite BAKE flashes 3 1d22 Sensor resistance > 0 BAKE flashes 3 Disables all cook function for cavity Sensor resistance > 0 BAKE flashes 3 3d11 Door switch not closed when door is locked BAKE flashes 3 Disables all cook function for cavity Door switch not closed when door is locked BAKE flashes 3 3d12 No reverse airflow fan rotation (no/low RPM) Disables all cook function for cavity Reverse airflow fan state (on when should be off) Nothing 3d21 Nothing Disables all cook function for cavity Door switch not open or closed Nothing 3d22 Nothing Disables all cook function for cavity

4d11 Nothing Disables all cook function for cavity 4d12 4d21 Nothing Disables Clean and Lockout functions 5 4d31 Disables Clean and Lockout functions 5 LOCK flashes 3 Disables all cook function for cavity 4d51 LOCK flashes 3 No action LOCK flashes 3 Disables Convect, Clean, and Lockout functions 4, 5 4d52 Door switch not open or closed LOCK flashes 3 Turn off light and disable light from door switch LOCK flashes 3 Disables Convect, Clean, and Lockout functions 4, 5 9d11 Lock switch not closed LOCK flashes 3 Turn off light and disable light from door switch 9d12 Lock switch not closed 5 Disables Clean and Lockout functions 4 9d21 Unlock switch not closed Disables Clean and Lockout functions 4 Disables Clean and Lockout functions 4 9d22 Unlock switch not closed Disables Clean and Lockout functions 4 9d31 Latch both locked and unlocked Disables Clean and Lockout functions 4 9d32 Latch both locked and unlocked Disables Clean and Lockout functions 4

July 2004 8126P034-60 ©2004 Maytag Services 16023334

Technical Information Double Oven Gas Range

! WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.

NOTES:

1 “Action Taken” applies as long as the condition exists. If the condition goes away, the control recovers.

2 If there is a cook function or timer active, the function continues. The user cannot edit the function, and [Cancel] will cancel the cook mode.

3 Flash rate: 0.2 seconds on, 0.1 second off. Pressing any key will clear the display until the fault clears and is re-triggered.

4 “Action Taken” applies until there is a POR (Power On Reset [“hard reset”]).

5 If the control believes the door is locked, it will attempt to unlock it when the function cancels and the cavity temperature cools.

6 Special conditions for latch faults (9dxx): A known good unlock position is defined as when the unlock switch reads closed and lock switch reads open. A known good lock position is defined as when the unlock switch reads open and lock switch reads closed. A faulted switch means the switch input is reading an invalid state, neither open nor closed. Once a latch fault occurs, latch movement is disabled until there is a POR. An error tone will sound if a function requiring a faulted latch is attempted. If at POR, the latch is not at a known good unlock position:

If the latch is at a good lock position, it will attempt to unlock when the RTD (Resistance Temperature Device) temperature is below 400°F.

If the latch is not at a good lock position, the control will fault. If a latch fault occurs while the RTD is above the lock temperature, the latch will not try to move, but the fault is still logged

to EEPROM after the first stage of detection. The Display column for latch faults applies 1) If the latch was moving when the fault occurred; 2) If the latch is already in a

known locked state when the fault occurs.

LOCK flashes after a fault is detected and until the unlocked position is achieved. The unlock position may be identified by a successful unlock switch closure, or as the result of timing when the unlock switch is not functioning properly.

If the last known good position was unlock (e.g. baking, or idle) and a latch fault occurs, the motor is never moved. The fault is logged to EEPROM and is not seen by the user.

Latch fault detection is in two stages. The first stage is to allow the control to recover without moving the latch. After this: If the latch was previously at a known good unlock position, the latch will not move and the control will fault. If the control was previously in a known good lock position: If the RTD is below 400°F, the latch will attempt to recover to it’s proper position (up to three revolutions). If it cannot, the control will fault and the latch will move to a calculated unlock position. If the RTD is at or above 400°F, the control will fault. When the RTD cools to below 400°F, the control will attempt to recover to a good unlock position (up to three revolution). If it cannot, the control will fault and the latch will move to a calculated unlock position. Note: If the unlock position cannot be found, this may result in a second fault, the first fault occurring when the latch request was locked, and the second when the latch request is unlocked.

If the latch is moving when the fault occurs, the control will bypass the first stage of detection and immediately try to find it’s proper position. If it cannot, the control will fault and the latch will move to a calculated unlock position.

Affected DLBs (Double Line Breaks) and loads are disabled during detection. If the control is in a known good unlock position and the lock switch becomes faulted:

The control will not fault. If a function requiring latch movement is attempted while the lock switch is faulted, the control will sound an error

tone and the function will be disabled. If the control is in a known good lock position and the unlock switch becomes faulted:

The control will not fault. After the function is canceled and unlock is attempted, the control will attempt to unlock the latch according to

the procedures in these notes.

8126P034-60 6 July 2004 16023334 ©2004 Maytag Services