Technical Information Double Oven Electric Range
Technical Information⎯Double Oven Electric Range MER6549BAQ/W
MER6769BAQ/W
• Due to possibility of personal injury or property damage, always contact an authorized technician to service or repair this unit. • Refer to Service Manual 16023416 for detailed installation, operating, testing, troubleshooting, and disassembly instructions.
!
CAUTION
All safety information must be followed as provided in Service Manual 16023416.
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power. Model MER6549BA* Power Source @ 240 V (208 V) Electrical rating 12.9 kW (9.7 kW) Amperage 40 Amp Frequency 60 Hz Element Wattage @ 240 V Coil element, 4-turn 1,500* (2) Coil element, 5-turn 2,350* (2) Ribbon element, 6" N/A Ribbon element, 9" N/A Oven Wattage @ 240 V (208 V) Upper Bake 4 pass 1800* Lower Bake 4 pass 2600* Upper Broil 4 pass 2200* Lower Broil 6 pass 3000* Oven Interior Dimensions in. (cm) Height 16 ½ (42) Width 23 (58) Depth 17 ½ (46) Product Exterior Dimensions in. (cm) Height overall 46 ¾ (118) Width 29 7/8 (76) Depth oven door closed 26 1/8 (66) without handle Features Deluxe Electronic Keypad Yes Oven Control Delay Start Yes Separate Upper and Yes Lower Oven Controls Automatic oven door latch Yes Porcelain Broil Pan Yes Toaster Upper Oven Keep Warm Upper Oven Weight lbs. (kg) Crated 240 (110)
MER6769BA* 12.9 kW (9.7 kW) 40 Amp 60 Hz N/A N/A 1,200 W* (2) 2,200 W* (2) 1800* 2600* 2200* 3000* 16 ½ 23 17 ½
(42) (58) (46)
46 ¾ 29 7/8
(118) (76)
26 1/8
(66) Yes Yes Yes
Yes Yes Upper Oven Upper Oven 240
(110)
* Rating of 208 VAC is approximately 80% of 240 VAC value.
February 2005 ©2005 Maytag Services
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Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power. Illustration
4-turn 5-turn (Model MER6549BA*) 1200 W 2200 W (Model MER6769BA*) 5
4 H2
L1 3
L2
Component Oven light socket
Test Procedure Remove one wire from receptacle and test resistance of terminals................... Measure voltage at oven light...............
Coil elements
Remove element and measure resistance across terminals.
Ribbon elements
Remove element and measure resistance across terminals.
Snap Action Infinite switch
Connect Volt-ohms meter to H1 and H2. Measure the following for voltages at LO, MED, HI: H1 to H2 ............................................
P 2 1 H1
Bake element, Upper
Bake element, Lower
Broil element, Upper
Broil element, Lower
Hot surface indicator light
Disconnect wire leads to element and measure resistance of terminals........... Measure voltage at bake element.........
Disconnect wire leads to element and measure resistance of terminals........... Measure voltage at bake element.........
Disconnect wire leads to element and measure resistance of terminals........... Measure voltage at broil element..........
Disconnect wire leads to element and measure resistance of terminals........... Measure voltage at broil element..........
Measure voltage at indicator light. .......
(Model MER6769BA*) Rocker switch
Door plunger switch
Autolatch assembly with switch
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Results Indicates continuity with bulb screwed in. 120 VAC, see wiring diagram for terminal identification. If no voltage is present at oven light, check wiring or light switches. Continuity, if not replace. 4-turn: 37 to 45 Ω Approximately 5-turn: 23 to 27 Ω Approximately Continuity, if not replace. 1200W: 45 to 49 Ω Approximately 2200W: 24 to 27 Ω Approximately
Approximate Time On Time Off LO 5% 95% MED (4-5) 35% 65% HI 100% 0% 240 VAC, if not replace switch. Approximately 31.0 Ω, if not replace. 240 VAC, see wiring diagram for terminal identification. If no voltage is present at bake element check wiring. Approximately 21.3 Ω, if not replace. 240 VAC, see wiring diagram for terminal identification. If no voltage is present at bake element check wiring. Approximately 25.4 Ω, if not replace. 240 VAC, see wiring diagram for terminal identification. If no voltage is present at broil element check wiring. Approximately 18.6 Ω, if not replace. 240 VAC, see wiring diagram for terminal identification. If no voltage is present at broil element check wiring. If voltage is present and light does not work replace light. If no voltage is present at indicator light check wiring.
Measure continuity of switch positions: Closed............................................... Open .................................................
Continuity Infinite
Measure continuity at the following points: C-NO ...............................................
Plunger in infinite, Plunger out continuity.
Disconnect wires and test for continuity per wiring diagram.
2
See wiring diagram for schematic layout. Refer to Parts Manual for correct autolatch switch associated with the correct manufacturing number.
February 2004 ©2005 Maytag Services
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power. Illustration
Component Limiter
Temperature sensor Gemini™ II Controlled
Oven temperature adjustment (Either Oven)
Gemini™ II Controlled
Twelve hour off
Gemini™ II Controlled Gemini™ II Controlled Gemini™ II Controlled
Timer Beeps
Gemini™ II Controlled Gemini™ II Controlled Gemini™ II Controlled Gemini™ II Controlled Gemini™ II Controlled Gemini™ II Controlled Gemini™ II Controlled
Cook Time Beeps Child lock out
Scroll Speed Dim Display Temperature display Factory Default Clock Display Demo Diagnostic Code Display
February 2005 ©2005 Maytag Services
Test Procedure Results Normally Closed Verify proper operation. Open............. Approx. 216°F ................... Infinite Closed .......... Approx. 176°F ................... Continuity Measure resistance..................................... Approximately 1100 Ω at room temperature 75°F. Press Bake pad. Enter 550 on the digitpad. Immediately press and hold 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 Setup, then 12 Hour Off (1) pad. Press Autoset to activate. Press Setup, then Timer Beeps (2) pad. Press Autoset to set. Press Setup, then Cook Time Beeps (3) pad. Press Autoset to set. Press Setup, then Control Lock (4) pad. Press Autoset to activate. "CONTROLLED LOCK" will scroll twice. To unlock, press Setup, then Control Lock (4) pad. Press Autoset. "CONTROL UNLOCKED" will scroll. Press Setup, then Scroll Speed (5) pad. Press Autoset to set. Press Setup, then Dim Display (6) pad. Press Autoset to set. Press Setup, then Temp C/F (7) pad. Press Autoset to toggle. Press Setup, then Default (9) pad. Press Autoset to reset settings. Press Clock to turn clock display on or off. Press and hold Bake and Cancel pads for 3 seconds. Press Bake, enter temperature of 100°F (38°C), then hold Bake pad down for 3 seconds within 30 seconds of the initial Bake pad press.
3
While increasing or decreasing oven temperature, this does not affect selfcleaning temperature.
Control will automatically cancel any cooking operation and remove all relay drives 12 hours after the last pad touch. Adjusts the volume of the timer beeper. Adjusts the volume of the cook time beeper. This is a safety feature that can be used to prevent children from accidentally programming the oven. It disables the electronic oven control. Child lockout features must be reset after a power failure. Adjusts the speed of the data as it moves across the display. Sets the brightness level of the clock and other indicators. °F or °C setting on the display. Allows the clock to be reset to factory settings. Allows clock to be toggled On or OFF. Enters a demonstrative sales mode. Exit by pressing any key. Displays current fault code for 5 seconds in the "time section" of the display. Press Cancel to exit. See Fault Code Summary for explanations.
16026020
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.
Relay Logic
r r r r
OVEN LIGHT
r r r r r
DOUBLE LINE BREAK
COOKING MODE IDLE BAKE PREHEAT BAKE BROIL PREHEAT BROIL CLEAN PREHEAT CLEAN KEEP WARM
BROIL
BAKE
Subsequent changes implemented after the release of this technical sheet may have altered the parameters identified in this chart.
r r r
INDEX
- OFF - CYCLING - ON OR OFF (DETERMINED BY USER INPUT)
"Quick Test" Mode for Electronic Range Control Follow the procedure below to perform the Electronic Range Control (ERC) quick test. Enter instructions within 16 seconds of each other (via the touch pad) or the ERC will exit the quick test. 1. Press and hold Upper Cancel and Broil pads for 3 seconds within 5 minutes of power-up. NOTE: The test mode cannot be accessed if the oven temperature is above 400° F (205° C). 2. Once the control has entered the "Quick Test" mode (digit area displays "-"), release both pads. 3. Press each of the following pads indicated below. 4. Press Cancel or wait 16 seconds after last key pressed to exit the test. 5. Display will indicate the following: Pad Response UPPER BAKE...................... Upper Bake element, DLB relay activated LOWER BAKE..................... Lower Bake element, DLB relay activated TOAST................................. DLB relay activated UPPER KEEP WARM ......... Motorized Door Lock activated UPPER BROIL .................... Upper Broil element, DLB relay activated LOWER BROIL ................... Lower Broil element, DLB relay activated OVEN LIGHT....................... Oven lights activated UPPER CLEAN ................... Upper Motorized Door Lock activated LOWER CLEAN .................. Lower Motorized Door Lock activated STOP TIME ......................... Beeper activated COOK TIME ........................ Displays error codes CLOCK ................................ All display segments illuminated 16026020
4
February 2005 ©2005 Maytag Services
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.
Fault Code Summary Code F0-0 F1-1
F1-2
F1-3 F1-4 F1-5 F1-6 F1-7 F1-8 F1-9 F1-A F1-B F1-C F1-D F1-E F1-F F1-H F1-L F3-1 F3-2 F9-1 F9-2 F9-3 F9-4 F9-5 F9-6
Description When Checked Correction No Fault Anytime ..................................... None. Runaway cook, upper oven................ Every 6 seconds when latch Temperature above 650° F (344° C) .. unlocked .................................... Check sensor, 1050 to 1100 ohms. If OK, check wiring, control. Runaway cook, lower oven................. Every 6 seconds when latch Temperature above 650° F (344° C) .. unlocked .................................... Check sensor, 1050 to 1100 ohms. If OK, check wiring, control. Runaway clean, upper oven............... Every 6 seconds when latch Temperature above 900° F (483° C) .. locked ........................................ Check sensor and control. Runaway clean, lower oven................ Every 6 seconds when latch Temperature above 900° F (483° C) .. locked ........................................ Check sensor and control. Cancel keypad, upper oven................ Every 30 seconds ...................... Check ribbon cable. If OK, replace control. Cancel keypad, lower oven ................ Every 30 seconds ...................... Check ribbon cable. If OK, replace control. Keypad disconnected ......................... Every 30 seconds ...................... Check ribbon cable. If OK, replace control. Keypad shorted .................................. Every 30 seconds ...................... Check ribbon cable. If OK, replace control. Slave .................................................. Every 30 seconds ...................... Replace control. Latch switch, upper oven.................... Every 30 seconds ...................... Ensure upper latch switch is closed. Latch switch, lower oven .................... Every 30 seconds ...................... Ensure lower latch switch is closed. Door open, upper oven....................... Every 30 seconds ...................... Ensure door position switch is closed. Door open, lower oven ....................... Every 30 seconds ...................... Ensure door switch position is closed. EEPROM............................................ Every 6 seconds ........................ Replace control. Jumper ............................................... Every 30 seconds ...................... Replace control. EEPROM Read error.......................... Anytime ..................................... Replace control. Sensor wire ........................................ Anytime an oven is active.......... Ohm sensor wire end to end to ensure a closed path. Sensor, upper oven ............................ Every 6 seconds ........................ Ohm sensor, 1050 to 1100 ohms at room temperature. Sensor, lower oven............................. Every 6 seconds ........................ Ohm sensor, 1050 to 1100 ohms at room temperature. Latch switch, upper oven.................... Every 60 seconds when latch locked ........................................ Check switches latch assembly wiring. Unlock switch, upper oven ................. Every 60 seconds when latch locked ........................................ Check switches latch assembly wiring. Lock and unlock switch, upper oven .. Every 30 seconds ...................... Check switches latch assembly wiring. Lock switch, lower oven ..................... Every 60 seconds when latch locked ........................................ Check switches latch assembly wiring. Unlock switch, lower oven .................. Every 60 seconds when latch locked ........................................ Check switches latch assembly wiring. Lock and unlock switch, lower oven ... Every 30 seconds ...................... Check switches latch assembly wiring.
February 2005 ©2005 Maytag Services
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Wiring Diagram and Schematic
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.
MER6549BA* Wiring Diagram 16026020
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February 2005 ©2005 Maytag Services
Wiring Diagram and Schematic
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.
MER6549BA* Control Circuits February 2005 ©2005 Maytag Services
7
16026020
Wiring Diagram and Schematic
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.
MER6769BA* Wiring Diagram 16026020
8
February 2005 ©2005 Maytag Services
Wiring Diagram and Schematic
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.
MER6769BA* Control Circuits February 2005 ©2005 Maytag Services
9
16026020
MER6769BAQ/W
• Due to possibility of personal injury or property damage, always contact an authorized technician to service or repair this unit. • Refer to Service Manual 16023416 for detailed installation, operating, testing, troubleshooting, and disassembly instructions.
!
CAUTION
All safety information must be followed as provided in Service Manual 16023416.
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power. Model MER6549BA* Power Source @ 240 V (208 V) Electrical rating 12.9 kW (9.7 kW) Amperage 40 Amp Frequency 60 Hz Element Wattage @ 240 V Coil element, 4-turn 1,500* (2) Coil element, 5-turn 2,350* (2) Ribbon element, 6" N/A Ribbon element, 9" N/A Oven Wattage @ 240 V (208 V) Upper Bake 4 pass 1800* Lower Bake 4 pass 2600* Upper Broil 4 pass 2200* Lower Broil 6 pass 3000* Oven Interior Dimensions in. (cm) Height 16 ½ (42) Width 23 (58) Depth 17 ½ (46) Product Exterior Dimensions in. (cm) Height overall 46 ¾ (118) Width 29 7/8 (76) Depth oven door closed 26 1/8 (66) without handle Features Deluxe Electronic Keypad Yes Oven Control Delay Start Yes Separate Upper and Yes Lower Oven Controls Automatic oven door latch Yes Porcelain Broil Pan Yes Toaster Upper Oven Keep Warm Upper Oven Weight lbs. (kg) Crated 240 (110)
MER6769BA* 12.9 kW (9.7 kW) 40 Amp 60 Hz N/A N/A 1,200 W* (2) 2,200 W* (2) 1800* 2600* 2200* 3000* 16 ½ 23 17 ½
(42) (58) (46)
46 ¾ 29 7/8
(118) (76)
26 1/8
(66) Yes Yes Yes
Yes Yes Upper Oven Upper Oven 240
(110)
* Rating of 208 VAC is approximately 80% of 240 VAC value.
February 2005 ©2005 Maytag Services
1
16026020
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power. Illustration
4-turn 5-turn (Model MER6549BA*) 1200 W 2200 W (Model MER6769BA*) 5
4 H2
L1 3
L2
Component Oven light socket
Test Procedure Remove one wire from receptacle and test resistance of terminals................... Measure voltage at oven light...............
Coil elements
Remove element and measure resistance across terminals.
Ribbon elements
Remove element and measure resistance across terminals.
Snap Action Infinite switch
Connect Volt-ohms meter to H1 and H2. Measure the following for voltages at LO, MED, HI: H1 to H2 ............................................
P 2 1 H1
Bake element, Upper
Bake element, Lower
Broil element, Upper
Broil element, Lower
Hot surface indicator light
Disconnect wire leads to element and measure resistance of terminals........... Measure voltage at bake element.........
Disconnect wire leads to element and measure resistance of terminals........... Measure voltage at bake element.........
Disconnect wire leads to element and measure resistance of terminals........... Measure voltage at broil element..........
Disconnect wire leads to element and measure resistance of terminals........... Measure voltage at broil element..........
Measure voltage at indicator light. .......
(Model MER6769BA*) Rocker switch
Door plunger switch
Autolatch assembly with switch
16026020
Results Indicates continuity with bulb screwed in. 120 VAC, see wiring diagram for terminal identification. If no voltage is present at oven light, check wiring or light switches. Continuity, if not replace. 4-turn: 37 to 45 Ω Approximately 5-turn: 23 to 27 Ω Approximately Continuity, if not replace. 1200W: 45 to 49 Ω Approximately 2200W: 24 to 27 Ω Approximately
Approximate Time On Time Off LO 5% 95% MED (4-5) 35% 65% HI 100% 0% 240 VAC, if not replace switch. Approximately 31.0 Ω, if not replace. 240 VAC, see wiring diagram for terminal identification. If no voltage is present at bake element check wiring. Approximately 21.3 Ω, if not replace. 240 VAC, see wiring diagram for terminal identification. If no voltage is present at bake element check wiring. Approximately 25.4 Ω, if not replace. 240 VAC, see wiring diagram for terminal identification. If no voltage is present at broil element check wiring. Approximately 18.6 Ω, if not replace. 240 VAC, see wiring diagram for terminal identification. If no voltage is present at broil element check wiring. If voltage is present and light does not work replace light. If no voltage is present at indicator light check wiring.
Measure continuity of switch positions: Closed............................................... Open .................................................
Continuity Infinite
Measure continuity at the following points: C-NO ...............................................
Plunger in infinite, Plunger out continuity.
Disconnect wires and test for continuity per wiring diagram.
2
See wiring diagram for schematic layout. Refer to Parts Manual for correct autolatch switch associated with the correct manufacturing number.
February 2004 ©2005 Maytag Services
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power. Illustration
Component Limiter
Temperature sensor Gemini™ II Controlled
Oven temperature adjustment (Either Oven)
Gemini™ II Controlled
Twelve hour off
Gemini™ II Controlled Gemini™ II Controlled Gemini™ II Controlled
Timer Beeps
Gemini™ II Controlled Gemini™ II Controlled Gemini™ II Controlled Gemini™ II Controlled Gemini™ II Controlled Gemini™ II Controlled Gemini™ II Controlled
Cook Time Beeps Child lock out
Scroll Speed Dim Display Temperature display Factory Default Clock Display Demo Diagnostic Code Display
February 2005 ©2005 Maytag Services
Test Procedure Results Normally Closed Verify proper operation. Open............. Approx. 216°F ................... Infinite Closed .......... Approx. 176°F ................... Continuity Measure resistance..................................... Approximately 1100 Ω at room temperature 75°F. Press Bake pad. Enter 550 on the digitpad. Immediately press and hold 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 Setup, then 12 Hour Off (1) pad. Press Autoset to activate. Press Setup, then Timer Beeps (2) pad. Press Autoset to set. Press Setup, then Cook Time Beeps (3) pad. Press Autoset to set. Press Setup, then Control Lock (4) pad. Press Autoset to activate. "CONTROLLED LOCK" will scroll twice. To unlock, press Setup, then Control Lock (4) pad. Press Autoset. "CONTROL UNLOCKED" will scroll. Press Setup, then Scroll Speed (5) pad. Press Autoset to set. Press Setup, then Dim Display (6) pad. Press Autoset to set. Press Setup, then Temp C/F (7) pad. Press Autoset to toggle. Press Setup, then Default (9) pad. Press Autoset to reset settings. Press Clock to turn clock display on or off. Press and hold Bake and Cancel pads for 3 seconds. Press Bake, enter temperature of 100°F (38°C), then hold Bake pad down for 3 seconds within 30 seconds of the initial Bake pad press.
3
While increasing or decreasing oven temperature, this does not affect selfcleaning temperature.
Control will automatically cancel any cooking operation and remove all relay drives 12 hours after the last pad touch. Adjusts the volume of the timer beeper. Adjusts the volume of the cook time beeper. This is a safety feature that can be used to prevent children from accidentally programming the oven. It disables the electronic oven control. Child lockout features must be reset after a power failure. Adjusts the speed of the data as it moves across the display. Sets the brightness level of the clock and other indicators. °F or °C setting on the display. Allows the clock to be reset to factory settings. Allows clock to be toggled On or OFF. Enters a demonstrative sales mode. Exit by pressing any key. Displays current fault code for 5 seconds in the "time section" of the display. Press Cancel to exit. See Fault Code Summary for explanations.
16026020
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.
Relay Logic
r r r r
OVEN LIGHT
r r r r r
DOUBLE LINE BREAK
COOKING MODE IDLE BAKE PREHEAT BAKE BROIL PREHEAT BROIL CLEAN PREHEAT CLEAN KEEP WARM
BROIL
BAKE
Subsequent changes implemented after the release of this technical sheet may have altered the parameters identified in this chart.
r r r
INDEX
- OFF - CYCLING - ON OR OFF (DETERMINED BY USER INPUT)
"Quick Test" Mode for Electronic Range Control Follow the procedure below to perform the Electronic Range Control (ERC) quick test. Enter instructions within 16 seconds of each other (via the touch pad) or the ERC will exit the quick test. 1. Press and hold Upper Cancel and Broil pads for 3 seconds within 5 minutes of power-up. NOTE: The test mode cannot be accessed if the oven temperature is above 400° F (205° C). 2. Once the control has entered the "Quick Test" mode (digit area displays "-"), release both pads. 3. Press each of the following pads indicated below. 4. Press Cancel or wait 16 seconds after last key pressed to exit the test. 5. Display will indicate the following: Pad Response UPPER BAKE...................... Upper Bake element, DLB relay activated LOWER BAKE..................... Lower Bake element, DLB relay activated TOAST................................. DLB relay activated UPPER KEEP WARM ......... Motorized Door Lock activated UPPER BROIL .................... Upper Broil element, DLB relay activated LOWER BROIL ................... Lower Broil element, DLB relay activated OVEN LIGHT....................... Oven lights activated UPPER CLEAN ................... Upper Motorized Door Lock activated LOWER CLEAN .................. Lower Motorized Door Lock activated STOP TIME ......................... Beeper activated COOK TIME ........................ Displays error codes CLOCK ................................ All display segments illuminated 16026020
4
February 2005 ©2005 Maytag Services
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.
Fault Code Summary Code F0-0 F1-1
F1-2
F1-3 F1-4 F1-5 F1-6 F1-7 F1-8 F1-9 F1-A F1-B F1-C F1-D F1-E F1-F F1-H F1-L F3-1 F3-2 F9-1 F9-2 F9-3 F9-4 F9-5 F9-6
Description When Checked Correction No Fault Anytime ..................................... None. Runaway cook, upper oven................ Every 6 seconds when latch Temperature above 650° F (344° C) .. unlocked .................................... Check sensor, 1050 to 1100 ohms. If OK, check wiring, control. Runaway cook, lower oven................. Every 6 seconds when latch Temperature above 650° F (344° C) .. unlocked .................................... Check sensor, 1050 to 1100 ohms. If OK, check wiring, control. Runaway clean, upper oven............... Every 6 seconds when latch Temperature above 900° F (483° C) .. locked ........................................ Check sensor and control. Runaway clean, lower oven................ Every 6 seconds when latch Temperature above 900° F (483° C) .. locked ........................................ Check sensor and control. Cancel keypad, upper oven................ Every 30 seconds ...................... Check ribbon cable. If OK, replace control. Cancel keypad, lower oven ................ Every 30 seconds ...................... Check ribbon cable. If OK, replace control. Keypad disconnected ......................... Every 30 seconds ...................... Check ribbon cable. If OK, replace control. Keypad shorted .................................. Every 30 seconds ...................... Check ribbon cable. If OK, replace control. Slave .................................................. Every 30 seconds ...................... Replace control. Latch switch, upper oven.................... Every 30 seconds ...................... Ensure upper latch switch is closed. Latch switch, lower oven .................... Every 30 seconds ...................... Ensure lower latch switch is closed. Door open, upper oven....................... Every 30 seconds ...................... Ensure door position switch is closed. Door open, lower oven ....................... Every 30 seconds ...................... Ensure door switch position is closed. EEPROM............................................ Every 6 seconds ........................ Replace control. Jumper ............................................... Every 30 seconds ...................... Replace control. EEPROM Read error.......................... Anytime ..................................... Replace control. Sensor wire ........................................ Anytime an oven is active.......... Ohm sensor wire end to end to ensure a closed path. Sensor, upper oven ............................ Every 6 seconds ........................ Ohm sensor, 1050 to 1100 ohms at room temperature. Sensor, lower oven............................. Every 6 seconds ........................ Ohm sensor, 1050 to 1100 ohms at room temperature. Latch switch, upper oven.................... Every 60 seconds when latch locked ........................................ Check switches latch assembly wiring. Unlock switch, upper oven ................. Every 60 seconds when latch locked ........................................ Check switches latch assembly wiring. Lock and unlock switch, upper oven .. Every 30 seconds ...................... Check switches latch assembly wiring. Lock switch, lower oven ..................... Every 60 seconds when latch locked ........................................ Check switches latch assembly wiring. Unlock switch, lower oven .................. Every 60 seconds when latch locked ........................................ Check switches latch assembly wiring. Lock and unlock switch, lower oven ... Every 30 seconds ...................... Check switches latch assembly wiring.
February 2005 ©2005 Maytag Services
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16026020
Wiring Diagram and Schematic
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.
MER6549BA* Wiring Diagram 16026020
6
February 2005 ©2005 Maytag Services
Wiring Diagram and Schematic
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.
MER6549BA* Control Circuits February 2005 ©2005 Maytag Services
7
16026020
Wiring Diagram and Schematic
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.
MER6769BA* Wiring Diagram 16026020
8
February 2005 ©2005 Maytag Services
Wiring Diagram and Schematic
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.
MER6769BA* Control Circuits February 2005 ©2005 Maytag Services
9
16026020
