Svc And Tech Manual
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Electric Freestanding Range—Technical Information MER5555RC* • Due to possibility of personal injury or property damage, always contact an authorized technician for servicing or repair of this unit. • Refer to Service Manual 16025644 for detailed installation, operating, testing, troubleshooting, and disassembly instructions.
!
CAUTION
All safety information must be followed as provided in Service Manual 16025644.
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to range before servicing, unless testing requires power.
Model Power Source @ 240 V (208 V) Electrical rating Frequency Element Wattage @ 240 V (208 V) 4 - turn coil element 5 - turn coil element Oven Wattage @ 240 V (208 V) Bake 5 pass Broil 5 pass Oven Interior Dimensions in. (cm) Height Width Depth Product Exterior Dimensions in. (cm) Height overall Width Depth oven door closed with handle Clearance oven door Height of cooktop Features Frameless glass door with window Interior oven light Two oven racks - 8 positions Removable full width storage drawer Automatic oven door latch Power outlet on back guard Weight lbs. (kg) Uncrated
May 2006 © 2006 Maytag Services
1
MER5555RC* 11 kW 60 Hz
(8.3 kW)
1,500 2,350
(1,130) (1,765)
3,000 3,600
(2,400) (2,880)
19 3/16 24 1/4 19 3/8
(48.7) (61.3) (49.2)
47 3/8 29 7/8 28 1/2 48 7/8 36
(120.3) (75.9) (72.4) (124.1) (91.4) X X X X X X
200
(90.7)
16027237
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to range before servicing, unless testing requires power. Illustration
Coil elements
1500 W-4 turn 2350 W-5 turn
5
4 H2
Component Oven light socket
L1 3
L2
Snap Action Infinite switch
P 2 1 H1
Bake element
Broil element
Oven indicator light and Surface indicator light Rocker switch
Door plunger switch
Measure continuity at the following points: C-NO ................................................ Plunger in:...........Continuity. Plunger out: ........Infinite.
Autolatch assembly with switch
Disconnect wires and test for continuity per wiring diagram................ See wiring diagram for schematic layout. Refer to Parts Manual for correct autolatch switch associated with the correct manufacturing number.
Door latch assembly
Disconnect wires and test for continuity per wiring diagram................ See wiring diagram for schematic layout. Refer to Parts Manual for correct autolatch switch associated with the correct manufacturing number.
Limiter
Verify proper operation. Open ................ 320° F..................... Infinite. Manual Reset... Closed .................... Continuity.
Oven temperature sensor
Measure resistance.............................. Approximately 1100 Ω at room temperature 80° F.
Backguard outlet circuit breaker
Measure between terminals: Plunger closed (pushed in) ............... Continuity. Plunger open (pulled out).................. Infinite.
NC
C
Test Procedure Results Remove one wire from receptacle and test resistance of terminals............ Indicates continuity with bulb inserted. Measure voltage at oven light............... 120 VAC, see wiring diagram for terminal identification. If voltage is not present at oven light, check wiring or light switches. Remove element and measure resistance across terminals.................. Continuity, if not replace. 1500W: Approx. 35 to 39 Ω. 2350W: Approx. 22 to 25 Ω. Connect Volt-ohms meter to Approximate H1 and H2. Time On Time Off LO 5% 95% Measure the following for voltages at MED (4-5) 35% 65% LO, MED, HI: HI 100% 0% H1 to H2 ........................................... 240 VAC. If not, replace switch. Disconnect wire leads to element and measure resistance of terminals .......... Approximately 18.6 Ω. If not, replace. Measure voltage at bake element......... 240 VAC, see wiring diagram for terminal identification. If voltage is not present at bake element, check wiring. Disconnect wire leads to element and measure resistance of terminals .......... Approximately 15.5 Ω. If not, replace. Measure voltage at broil element ......... 240 VAC, see wiring diagram for terminal identification. If voltage is not present at broil element, check wiring. Measure voltage at indicator light. If voltage is present and light does not work, replace light. If voltage is not present at indicator light, check wiring. Measure continuity of switch positions: Closed .............................................. Continuity. Open................................................. Infinite.
NO
(Series 13 and older)
(Series 13 and older)
(Series 14 and newer)
16027237
2
May 2006 © 2006 Maytag Services
Control Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to range before servicing, unless testing requires power. Controller M1
Feature Oven temperature adjustment
M1
Temperature display
M1
Clock display
M1
24-hour clock
M1
Factory default
M1
24-hour off
M1
Sabbath mode
Test Procedure Press BAKE pad. Enter 550 on the digit-pad. Immediately press and hold BAKE pad for 3 to 5 seconds. Oven can be adjusted from -35 to +35 degrees in 5-degree increments by pressing SLEW 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 and hold Cancel and Bake pads for 3 to 5 seconds. Press and hold Cancel and Clock pads for 3 to 5 seconds. Press and hold Cancel and Delay pads for 3 to 5 seconds. Press and hold Cancel and Keep Warm pads for 3 to 5 seconds. Control will automatically cancel any cooking operation and remove all relay drives 12 hours after the last pad touch. Hold CLOCK pad for 3 to 5 seconds to activate Sabbath mode. Hold CLOCK for 3 to 5 seconds to disable Sabbath mode.
M1
M1
Child lock out
Diagnostic code display
Press and hold Cancel and Cook & Hold pads for 3 to 5 seconds. "OFF" will display where the temperature normally displays. "LOCK" flashes while the door is locking. To reactivate the control, press and hold Cancel and Cook & Hold pads for 3 to 5 seconds. Press and hold Up Arrow pad and Power Up the unit. Cycle through the codes using the number pads 1 through 5.
May 2006 © 2006 Maytag Services
3
Results While increasing or decreasing oven temperature, this does not affect selfcleaning temperature.
Toggles temperature display between °F and °C. Toggles clock on and off. Toggles clock between 12-hour and 24hour display. Resets the clock to factory settings. See Sabbath mode to disable.
"SAb" flashes for 5 seconds. Display returns to time of day. All pad inputs are disabled except for CANCEL and CLOCK pads. This mode disables the normal 12 hour shutoff to allow operation of the bake mode for a maximum of 72 hours. This safety feature is used to prevent children from accidentally programming the oven. The electronic oven control is disabled. Child lockout features must be reset after a power failure. The last 5 diagnostic codes are stored in the non-volatile memory. See "Description of Error Codes" for explanation.
16027237
Control Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to range before servicing, unless testing requires power.
"Quick Test" Mode for Electronic Range Control Follow procedure below to use the quick test mode. Entries must be made within 32 seconds of each other or the control will exit the quick test mode. 1. Press and hold 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:
The first time the pad is pressed, the response is activated. The second time the pad is pressed, the response is deactivated.
NOTE:
This mode can only be entered within the first 5 minutes after applying power.
NOTE:
If the temperature sensor is greater than 400° F and the Quick Test mode will be disabled if the temperature sensor reaches 400° F while under test.
Display will indicate the following: Key [Bake] [Broil] [Keep Warm] [Cook&Hold] [Clean] [Delay] (M1) [Timer] [Clock] [More +] [Less –] [Cancel]
Operation Bake relay activated, DLB relay activated Broil relay activated, DLB relay activated DLB relay activated Last Diagnostic Code displayed MDL relay activated (lock and unlock) EEPROM Version Number displayed Main Code Version Number displayed All Segments On Even Segments On Odd Segments On End Factory Test Mode
Description of Error Codes Error diagnostic codes can only be viewed by entering the Diagnostic Code Display Mode. Each error code is four digits long and is created based on the following table. Digit st 1
nd
2
rd
3 th 4
Description 1 – Local to the control circuit board 3 – Sensor or meat probe 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
Primary System:
Diagnostic Code Display Mode can be activated by pressing and holding the AUTOSET pad for 3 to 5 seconds at power-up. Diagnostic Code Display Mode can only be started while powering up the control.
16027237
4
May 2006 © 2006 Maytag Services
Control Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to range before servicing, unless testing requires power. Diagnostic Code Checking Code 1c1c 1c2c 1c31 1c6c 1c7c 1c8c 1d11 1d21 3d11 3d21 4d11
Description Shorted key Keyboard tail disconnected Cancel key circuit problem EEPROM error Control not calibrated Cooking program error Runaway temp (650° F), door unlocked Runaway temp (950° F), door locked Sensor open Sensor shorted Door switch position failure
4d51
Door switch circuit failure
9d11 9d21 9d31
Latch will not lock Latch will not unlock Latch state unknown, both locked and unlocked
When Checked Always Always Always When accessing EEPROM Always Cook or clean programmed Latch unlocked Latch locked Cook or clean active Cook or clean active Clean or keyboard Lockout active Convect, Clean or Keyboard Lockout programmed Latch should be locked Latch should be unlocked Latch should be locked or when lock attempted
Detection 1 minute 1 minute 20 seconds 3 tries 3 tries 3 tries 1 minute 1 minute 20 seconds 20 seconds 1 minute 1 minute 6
See Note 6 See Note 6 See Note
Diagnostic Code Handling Code
Measurable
What is Displayed
1c1c
Keypress
Nothing
1c2c
Keyboard loop improper value
Nothing
1c31 1c6c 1c7c 1c8c 1d11 1d21 3d11 3d21 4d11
Cancel key improper value No response from EEPROM Calibration value out of range CRC invalid Sensor resistance > 2237 Ohms Sensor resistance > 2787 Ohms Sensor resistance > Infinite Ohms Sensor resistance > 0 Ohms Door switch not closed when door is locked Door switch not open or closed
4d51
3
BAKE flashes Nothing "CAL" in the time digits Nothing 3 BAKE flashes 3 BAKE flashes 3 BAKE flashes 3 BAKE flashes Nothing Nothing
9d11
Lock switch not closed
9d21
Unlock switch not closed
9d31
Lock and unlock switches both closed
May 2006 © 2006 Maytag Services
LOCK flashes
3
LOCK flashes
3
LOCK flashes
3
5
Action Taken By Control Disables audible for affected key depression 1, 2 Disables all outputs Disables lights and timers Disables audible for key depression 1 Disables all outputs Disables lights and timers 1 Disables all outputs for cavity 1 Disables all outputs 4 Completely disables oven Cancels active cook function Disables all cook functions for cavity Disables all cook functions for cavity Disables all cook functions for cavity Disables all cook functions for cavity Disables Clean and Lockout 5 functions Disables Convect, Clean, and 4, 5 Lockout functions Turn off light and disable light from door switch Disables Clean and Lockout 4 functions Disables Clean and Lockout 4 functions Disables Clean and Lockout 4 functions
16027237
Control Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to range before servicing, unless testing requires power. NOTES: 1
"Action Taken" applies as long as the condition exists. If the condition clears, 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.
•
The detection for latch faults is in two stages. The first stage is to let the control recover without moving the latch. Then: •
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 revolutions). 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 the 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:
•
16027237
•
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.
6
May 2006 © 2006 Maytag Services
Wiring Diagram and Schematic
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to range before servicing, unless testing requires power.
Schematic Diagram (Control Circuits), Series 13 and older May 2006 © 2006 Maytag Services
7
16027237
Wiring Diagram and Schematic
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to range before servicing, unless testing requires power.
Wiring Diagram, Series 13 and older 16027237
8
May 2006 © 2006 Maytag Services
Wiring Diagram and Schematic
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to range before servicing, unless testing requires power.
Schematic Diagram (Control Circuits), Series 14 and newer May 2006 © 2006 Maytag Services
9
16027237
Wiring Diagram and Schematic
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to range before servicing, unless testing requires power.
Wiring Diagram, Series 14 and newer 16027237
10
May 2006 © 2006 Maytag Services
!
CAUTION
All safety information must be followed as provided in Service Manual 16025644.
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to range before servicing, unless testing requires power.
Model Power Source @ 240 V (208 V) Electrical rating Frequency Element Wattage @ 240 V (208 V) 4 - turn coil element 5 - turn coil element Oven Wattage @ 240 V (208 V) Bake 5 pass Broil 5 pass Oven Interior Dimensions in. (cm) Height Width Depth Product Exterior Dimensions in. (cm) Height overall Width Depth oven door closed with handle Clearance oven door Height of cooktop Features Frameless glass door with window Interior oven light Two oven racks - 8 positions Removable full width storage drawer Automatic oven door latch Power outlet on back guard Weight lbs. (kg) Uncrated
May 2006 © 2006 Maytag Services
1
MER5555RC* 11 kW 60 Hz
(8.3 kW)
1,500 2,350
(1,130) (1,765)
3,000 3,600
(2,400) (2,880)
19 3/16 24 1/4 19 3/8
(48.7) (61.3) (49.2)
47 3/8 29 7/8 28 1/2 48 7/8 36
(120.3) (75.9) (72.4) (124.1) (91.4) X X X X X X
200
(90.7)
16027237
Component Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to range before servicing, unless testing requires power. Illustration
Coil elements
1500 W-4 turn 2350 W-5 turn
5
4 H2
Component Oven light socket
L1 3
L2
Snap Action Infinite switch
P 2 1 H1
Bake element
Broil element
Oven indicator light and Surface indicator light Rocker switch
Door plunger switch
Measure continuity at the following points: C-NO ................................................ Plunger in:...........Continuity. Plunger out: ........Infinite.
Autolatch assembly with switch
Disconnect wires and test for continuity per wiring diagram................ See wiring diagram for schematic layout. Refer to Parts Manual for correct autolatch switch associated with the correct manufacturing number.
Door latch assembly
Disconnect wires and test for continuity per wiring diagram................ See wiring diagram for schematic layout. Refer to Parts Manual for correct autolatch switch associated with the correct manufacturing number.
Limiter
Verify proper operation. Open ................ 320° F..................... Infinite. Manual Reset... Closed .................... Continuity.
Oven temperature sensor
Measure resistance.............................. Approximately 1100 Ω at room temperature 80° F.
Backguard outlet circuit breaker
Measure between terminals: Plunger closed (pushed in) ............... Continuity. Plunger open (pulled out).................. Infinite.
NC
C
Test Procedure Results Remove one wire from receptacle and test resistance of terminals............ Indicates continuity with bulb inserted. Measure voltage at oven light............... 120 VAC, see wiring diagram for terminal identification. If voltage is not present at oven light, check wiring or light switches. Remove element and measure resistance across terminals.................. Continuity, if not replace. 1500W: Approx. 35 to 39 Ω. 2350W: Approx. 22 to 25 Ω. Connect Volt-ohms meter to Approximate H1 and H2. Time On Time Off LO 5% 95% Measure the following for voltages at MED (4-5) 35% 65% LO, MED, HI: HI 100% 0% H1 to H2 ........................................... 240 VAC. If not, replace switch. Disconnect wire leads to element and measure resistance of terminals .......... Approximately 18.6 Ω. If not, replace. Measure voltage at bake element......... 240 VAC, see wiring diagram for terminal identification. If voltage is not present at bake element, check wiring. Disconnect wire leads to element and measure resistance of terminals .......... Approximately 15.5 Ω. If not, replace. Measure voltage at broil element ......... 240 VAC, see wiring diagram for terminal identification. If voltage is not present at broil element, check wiring. Measure voltage at indicator light. If voltage is present and light does not work, replace light. If voltage is not present at indicator light, check wiring. Measure continuity of switch positions: Closed .............................................. Continuity. Open................................................. Infinite.
NO
(Series 13 and older)
(Series 13 and older)
(Series 14 and newer)
16027237
2
May 2006 © 2006 Maytag Services
Control Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to range before servicing, unless testing requires power. Controller M1
Feature Oven temperature adjustment
M1
Temperature display
M1
Clock display
M1
24-hour clock
M1
Factory default
M1
24-hour off
M1
Sabbath mode
Test Procedure Press BAKE pad. Enter 550 on the digit-pad. Immediately press and hold BAKE pad for 3 to 5 seconds. Oven can be adjusted from -35 to +35 degrees in 5-degree increments by pressing SLEW 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 and hold Cancel and Bake pads for 3 to 5 seconds. Press and hold Cancel and Clock pads for 3 to 5 seconds. Press and hold Cancel and Delay pads for 3 to 5 seconds. Press and hold Cancel and Keep Warm pads for 3 to 5 seconds. Control will automatically cancel any cooking operation and remove all relay drives 12 hours after the last pad touch. Hold CLOCK pad for 3 to 5 seconds to activate Sabbath mode. Hold CLOCK for 3 to 5 seconds to disable Sabbath mode.
M1
M1
Child lock out
Diagnostic code display
Press and hold Cancel and Cook & Hold pads for 3 to 5 seconds. "OFF" will display where the temperature normally displays. "LOCK" flashes while the door is locking. To reactivate the control, press and hold Cancel and Cook & Hold pads for 3 to 5 seconds. Press and hold Up Arrow pad and Power Up the unit. Cycle through the codes using the number pads 1 through 5.
May 2006 © 2006 Maytag Services
3
Results While increasing or decreasing oven temperature, this does not affect selfcleaning temperature.
Toggles temperature display between °F and °C. Toggles clock on and off. Toggles clock between 12-hour and 24hour display. Resets the clock to factory settings. See Sabbath mode to disable.
"SAb" flashes for 5 seconds. Display returns to time of day. All pad inputs are disabled except for CANCEL and CLOCK pads. This mode disables the normal 12 hour shutoff to allow operation of the bake mode for a maximum of 72 hours. This safety feature is used to prevent children from accidentally programming the oven. The electronic oven control is disabled. Child lockout features must be reset after a power failure. The last 5 diagnostic codes are stored in the non-volatile memory. See "Description of Error Codes" for explanation.
16027237
Control Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to range before servicing, unless testing requires power.
"Quick Test" Mode for Electronic Range Control Follow procedure below to use the quick test mode. Entries must be made within 32 seconds of each other or the control will exit the quick test mode. 1. Press and hold 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:
The first time the pad is pressed, the response is activated. The second time the pad is pressed, the response is deactivated.
NOTE:
This mode can only be entered within the first 5 minutes after applying power.
NOTE:
If the temperature sensor is greater than 400° F and the Quick Test mode will be disabled if the temperature sensor reaches 400° F while under test.
Display will indicate the following: Key [Bake] [Broil] [Keep Warm] [Cook&Hold] [Clean] [Delay] (M1) [Timer] [Clock] [More +] [Less –] [Cancel]
Operation Bake relay activated, DLB relay activated Broil relay activated, DLB relay activated DLB relay activated Last Diagnostic Code displayed MDL relay activated (lock and unlock) EEPROM Version Number displayed Main Code Version Number displayed All Segments On Even Segments On Odd Segments On End Factory Test Mode
Description of Error Codes Error diagnostic codes can only be viewed by entering the Diagnostic Code Display Mode. Each error code is four digits long and is created based on the following table. Digit st 1
nd
2
rd
3 th 4
Description 1 – Local to the control circuit board 3 – Sensor or meat probe 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
Primary System:
Diagnostic Code Display Mode can be activated by pressing and holding the AUTOSET pad for 3 to 5 seconds at power-up. Diagnostic Code Display Mode can only be started while powering up the control.
16027237
4
May 2006 © 2006 Maytag Services
Control Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to range before servicing, unless testing requires power. Diagnostic Code Checking Code 1c1c 1c2c 1c31 1c6c 1c7c 1c8c 1d11 1d21 3d11 3d21 4d11
Description Shorted key Keyboard tail disconnected Cancel key circuit problem EEPROM error Control not calibrated Cooking program error Runaway temp (650° F), door unlocked Runaway temp (950° F), door locked Sensor open Sensor shorted Door switch position failure
4d51
Door switch circuit failure
9d11 9d21 9d31
Latch will not lock Latch will not unlock Latch state unknown, both locked and unlocked
When Checked Always Always Always When accessing EEPROM Always Cook or clean programmed Latch unlocked Latch locked Cook or clean active Cook or clean active Clean or keyboard Lockout active Convect, Clean or Keyboard Lockout programmed Latch should be locked Latch should be unlocked Latch should be locked or when lock attempted
Detection 1 minute 1 minute 20 seconds 3 tries 3 tries 3 tries 1 minute 1 minute 20 seconds 20 seconds 1 minute 1 minute 6
See Note 6 See Note 6 See Note
Diagnostic Code Handling Code
Measurable
What is Displayed
1c1c
Keypress
Nothing
1c2c
Keyboard loop improper value
Nothing
1c31 1c6c 1c7c 1c8c 1d11 1d21 3d11 3d21 4d11
Cancel key improper value No response from EEPROM Calibration value out of range CRC invalid Sensor resistance > 2237 Ohms Sensor resistance > 2787 Ohms Sensor resistance > Infinite Ohms Sensor resistance > 0 Ohms Door switch not closed when door is locked Door switch not open or closed
4d51
3
BAKE flashes Nothing "CAL" in the time digits Nothing 3 BAKE flashes 3 BAKE flashes 3 BAKE flashes 3 BAKE flashes Nothing Nothing
9d11
Lock switch not closed
9d21
Unlock switch not closed
9d31
Lock and unlock switches both closed
May 2006 © 2006 Maytag Services
LOCK flashes
3
LOCK flashes
3
LOCK flashes
3
5
Action Taken By Control Disables audible for affected key depression 1, 2 Disables all outputs Disables lights and timers Disables audible for key depression 1 Disables all outputs Disables lights and timers 1 Disables all outputs for cavity 1 Disables all outputs 4 Completely disables oven Cancels active cook function Disables all cook functions for cavity Disables all cook functions for cavity Disables all cook functions for cavity Disables all cook functions for cavity Disables Clean and Lockout 5 functions Disables Convect, Clean, and 4, 5 Lockout functions Turn off light and disable light from door switch Disables Clean and Lockout 4 functions Disables Clean and Lockout 4 functions Disables Clean and Lockout 4 functions
16027237
Control Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to range before servicing, unless testing requires power. NOTES: 1
"Action Taken" applies as long as the condition exists. If the condition clears, 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.
•
The detection for latch faults is in two stages. The first stage is to let the control recover without moving the latch. Then: •
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 revolutions). 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 the 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:
•
16027237
•
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.
6
May 2006 © 2006 Maytag Services
Wiring Diagram and Schematic
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to range before servicing, unless testing requires power.
Schematic Diagram (Control Circuits), Series 13 and older May 2006 © 2006 Maytag Services
7
16027237
Wiring Diagram and Schematic
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to range before servicing, unless testing requires power.
Wiring Diagram, Series 13 and older 16027237
8
May 2006 © 2006 Maytag Services
Wiring Diagram and Schematic
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to range before servicing, unless testing requires power.
Schematic Diagram (Control Circuits), Series 14 and newer May 2006 © 2006 Maytag Services
9
16027237
Wiring Diagram and Schematic
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to range before servicing, unless testing requires power.
Wiring Diagram, Series 14 and newer 16027237
10
May 2006 © 2006 Maytag Services
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