tech-manual-w11503312-reva
FOR SERVICE TECHNICIAN’S USE ONLY

Tech Manual Do not discard

DANGER WARNING

Electrical Shock Hazard Electrical Shock Hazard Disconnect power before servicing. Only authorized technicians should perform diagnostic Replace all parts and panels before operating. voltage measurements. Failure to do so can result in death or electrical shock.

After performing voltage measurements, disconnect power before servicing.

Failure to follow these instructions can result in death or electrical shock.

Voltage Measurement Safety Information

When performing live voltage measurements, you must do the following: I Verify the controls are in the off position so that the appliance does not start when energized. I Allow enough space to perform the voltage measurements without obstructions. I Keep other people a safe distance away from the appliance to prevent potential injury. I Always use the proper testing equipment. I After voltage measurements, always disconnect power before servicing.

Temperature Adjustment (All Maxwell Controls)

NOTE: On models with a numeric keypad on the control, press the “3” key instead of the “up” arrow or “+” (plus) keypad. Press the “6” key instead of the “down” arrow or “-” (minus) keypad. On some models, press the OFF keypad if there is not a CANCEL keypad.

Step Function Keypad Pressed Notes

1 Temperature adjustment Press OPTIONS until “Temp Calib” is The current offset is shown in the display or 0° if there is displayed no offset.

2 Temperature adjustment options Press the “3” or “6” keypads Adjust temperature in 5°F (3°C) increments. The range can be set between 30°F (18°C) and -30°F (-18°C). 3 Activate temperature adjustment Press START Bake temperature adjustment cannot result in operating temperatures higher than 550°F (288°C) or lower than 170°F (77°C), as measured at the oven center.

The broil temperature is automatically offset the same as the bake temperature.

Desired temperature adjustment is activated. If START is not pressed within 1 minute, adjustment is ignored.

W11503312A FOR SERVICE TECHNICIAN’S USE ONLY

FOR SERVICE TECHNICIAN’S USE ONLY

Diagnostics Mode for Maxwell Control

IMPORTANT: You must run an Auto Test before performing any other diagnostics. Refer to steps 1 through 4 in the following chart to run Auto Test. Press CANCEL at any time to exit.

NOTE: On models with a numeric keypad on the control, press the “3” key instead of the “up” arrow or “+” (plus) keypad. Press the “6” key instead of the “down” arrow or “-” (minus) keypad. On some models, press the OFF keypad if there is not a CANCEL keypad.

Step Key Press Control Display

1 CANCEL > CANCEL > START “TEST ON” with cavity temperature and door position, “UO” = Oven door closed or “UI” = Oven door open

2 Press the “up” arrow, the “+” (plus) key or the “3” key to scroll through the “AUTO TEST” service modes to Auto Test.

3 Follow the display prompts to run Auto Test to observe the following results:

Result #1 – Do not replace the Maxwell control. “Maxwell is GOOD, no faults found”

Result #2 – Tests completed with failure/fault codes. Failure/Fault codes are listed in scrolling text.

NOTE: Failures are problems within the Maxwell control. Faults are problems beyond the Maxwell control (for example, “0 Failures and 2 Faults found – Maxwell is good.” There is a problem with a wiring harness, wiring connection, or component outside the Maxwell control).

4 Press CANCEL to exit. Refer to the “Failure/Error Display Codes” section to correct.

Service Modes for Maxwell Control

Press CANCEL>CANCEL>START to enter Service mode.

NOTE: On models with a numeric keypad on the control, press the “3” key instead of the “up” arrow or “+” (plus) keypad. Press the “6” key instead of the “down” arrow or “-” (minus) keypad. On some models, press the Off keypad if there is not a Cancel keypad.

Step Service Mode Service Mode Description Upon entry TEST ON 1 USAGE Perform relay checks. See the “Relay Checks for Maxwell Control” section. Press the key that is listed in the “Key Press” column for the desired function and display. Display shows oven temperature from oven 2 ENG MODE temperature sensor and door position (0-closed, 1-open).

3 TEST MODE Displays the usage time in hours for several range functions. 4 VERSION 5 DISPLAY Press START to enter, and then press the “+” keypad. Press START again and the display will show the 6 CONTROL RESET temperature of the oven sensor. Press the TIMER SET/OFF keypad to scroll between the oven sensor 7 FAULTS temperature, the warming drawer sensor temperature, and the control board sensor temperature. Press 8 RELAY USAGE CANCEL twice at any time to exit. 9 AUTO TEST Perform relay checks. See the “Relay Checks for Maxwell Control” section. Press the key that is listed in the “Key Press” column for the desired function.

Displays software version.

Displays all Maxwell control LEDs.

DO NOT USE this Service mode – for engineering use only.

Displays the most recent fault code. The last 10 faults are stored and may be cleared by following the prompts. Clear faults as directed by pressing START TIME or DELAY START.

Displays the usage time in hours for several range functions.

Automatic diagnostics mode that must be run before performing any other diagnostic or before replacing the control.

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Relay Checks for Maxwell Control

NOTE: Relays are activated from the TEST ON Service mode. Press CANCEL at any time to exit. Some of the functions listed below may not be on your range.

Function Key Press Description Display Bake relay Turns Bake element on. Press again to turn Bake element off. b Broil relay BAKE Turns Broil element on. Press again to turn Broil element off. r c Convect relay BROIL Turns convection element on. Press again to turn convection element off. UO (MDL unlocked) Warming CONVECT or LO (MDL locked) drawer relay CONVECT BAKE H Oven light relay WZ WARM DRAWER Turns warming drawer element on. Press again to turn warming drawer Latch (on some models) element off. motor relay OVEN LIGHT Turns oven light on. Press again to turn oven light off. Convection fan relay PRECISE CLEAN Press to lock the door (motorized door latch [MDL]). Press again to unlock or SELF CLEAN the door. Warming zone relay RAPID PREHEAT, Turns convection fan on. Press again to turn convection fan off. CONVECTION ROAST or COOK TIME

WARM ZONE ON or Turns warming zone element on. Press again to turn warming zone element OFF. WARMING CENTER ON

All elements (depending on which cycle is being used) will operate with the oven door open. Latch motor will not cycle with oven door open. On electric models, the DLB (double line break) will engage on entering the Diagnostics mode and disengage on exit.

Failure/Error Display Codes

Display Codes Likely Failure Condition Suggested Corrective Action Procedure

F1 E0 EEPROM communication error 1. Press CANCEL>CANCEL>START to enter the Diagnostics mode and verify the Sensor out of range error code. E5 PCB thermistor open or shorted WIDE queue full 2. If an F1 error code is displayed, unplug range or disconnect power. Replace the E7 Maxwell control and then go to Step 4.

E9 3. If an F2 error code is displayed, unplug range or disconnect power. Replace the user interface (keypad membrane) and then go to Step 4. F2 E0 Keypad disconnected Stuck key 4. Replace all parts and panels before operating. E1 Cancel key error 5. Plug in range or reconnect power. E2 6. Verify operation is normal. Go to the Diagnostics mode and scroll to the Faults display to clear faults.

F3 E0 Main sensor open or shorted 1. Press CANCEL>CANCEL>START to enter the Diagnostics mode. At the first screen, verify the main oven sensor temperature readout. If it is available, verify the warming Oven Control/ Oven Temperature Sensor drawer sensor temperature readout. Maxwell 2. Continue in the Diagnostic mode to verify the error code. P10-3 VT P10-4 VT 3. If an F3E0 error code is displayed and the main oven sensor temperature reading is near room temperature, unplug range or disconnect power. Replace the main oven F3 E2 Warming drawer sensor open sensor as a failure at high temperature may be the cause of the fault. Then go to or shorted Step 9. If the sensor does not read room temperature, go to Step 5.

Oven Control/ Warming Drawer Sensor 4. If an F3E2 error code is displayed and the warming drawer sensor temperature Maxwell reading is near room temperature, unplug range or disconnect power. Replace the warming drawer sensor as a failure at high temperature may be the cause of the P10-1 GY GY fault. Then go to Step 9. If the sensor does not read room temperature, go to Step 5. P10-2 GY GY 5. Check all sensor connections on the harness and board.

6. Disconnect sensor from the harness.

7. Measure the oven sensor resistance (between connector pins). It should read between 1,000 Ω and 1,200 Ω. Measure the resistance from the sensor connector pins to the sensor casing for a possible short. If the resistance measurement is out of range, or if a short is found, replace the sensor.

8. Inspect the wire and connectors from the control to the sensor. If any damage is noted, replace the harness.

9. Replace all parts and panels before operating.

10. Plug in range or reconnect power.

11. Verify operation is normal for longer than 1 minute. Go to the Diagnostics mode and scroll to the Faults display to clear faults.

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Display Codes Likely Failure Condition Suggested Corrective Action Procedure

F5 E0 Door and switches do not agree 1. Press CANCEL>CANCEL>START to enter the Diagnostics mode and verify the (Clean mode – on some models) error code.

Oven Control/ 2. Press the Cancel/Off key. Press CANCEL>CANCEL>START to re-enter the Diagnostics Maxwell mode. With “TEST ON” displayed, open the oven door and fully engage the door switch. If the display does not change from “UI” to “UO,” go to Step 4. If the display P7-5 YL Door Position Switch does change, go to Step 3. P7-4 YL YL 3. Inspect door and frame for warping or misalignment keeping the door from fully F5 E1 Door latch not operating engaging the door switch. Make any necessary repairs then go to Step 7. (Clean mode – on some models) 4. Unplug range or disconnect power. F6 E1 Over temperature cook Over temperature (warming drawer) 5. Verify the actuating rod connection from the front frame to the door switch. E3 6. If there is damage to wires or connectors, replace the harness. If there is no damage F9 E0 Mis-wired house or range to wires or connectors, replace the door switch.

7. Replace all parts and panels before operating.

8. Plug in range or reconnect power.

9. Press CANCEL/OFF key. Select and start the Self Clean or Precise Clean function. Observe for at least 1 minute to ensure that operation is normal.

10. Go to the Diagnostics mode and scroll to the Faults display to clear faults.

1. Press CANCEL>CANCEL>START to enter the Diagnostics mode and verify the error code.

2. Press the Cancel/Off key. Press CANCEL>CANCEL>START to re-enter the Diagnostics mode. With “TEST ON” displayed, press the Self Clean or Precise Clean key to run the lock motor.

a. If the Lock icon remains lit after 8-10 seconds, verify that the door is locked. If the door is not locked, press the Self Clean or Precise Clean key a second time. When the Lock icon turns off, go to Step 3.

b. If the Lock icon is flashing, pull on the oven door handle every 4-5 seconds to check if the door is locked. The flashing will stop after 45 seconds with the door unlocked.

3. Unplug range or disconnect power.

4. Verify the wires and connectors between the latch assembly and control are seated properly. If the lock icon stayed lit in Step 2a, go to Step 7. If the door is latched in Step 2b, go to Step 5.

5. If the door is latched in Step 2b, check for continuity across the door latch switch with the switch depressed. If the switch measures open, replace the latch motor assembly. Go to Step 7.

6. If the door did not lock in Step 2b, check for continuity from P5-3 to P6-3. If the circuit is open or if the resistance of the latch motor is not between 500 Ω and 3,000 Ω, replace the motor latch assembly.

7. Verify the actuating rod connection between the latch and latch motor.

8. Replace all parts and panels before operating.

9. Plug in range or reconnect power.

10. Press CANCEL/OFF key. Select and start the Self Clean or Precise Clean function. Observe for at least 1 minute to ensure that operation is normal.

11. Press CANCEL>CANCEL>START to enter the Diagnostics mode and scroll to the Faults display to clear faults.

1. Press CANCEL>CANCEL>START to enter the Diagnostics mode and verify the error code.

2. Unplug range or disconnect power.

3. Replace Maxwell control.

4. Replace all parts and panels before operating.

5. Plug in range or reconnect power.

6. Verify operation is normal.

1. Verify failure by displaying diagnostics mode screen (see “Diagnostics mode for Maxwell Control” section). Press the TEMP/TIME “+” or “-” keypads or the Number 3 or 6 keypads, depending on the model, until “Faults” is displayed. Press START to verify codes. If failure displayed does match, then continue.

2. Unplug range to disconnect power.

3. Check wires and connectors between control board (P6) and power cord.

4. Check that the L1-L2-N wiring (pigtail) from the wall outlet is correctly connected to the range. Have a qualified electrician verify that the house wiring is wired properly between the circuit breaker panel and the wall outlet.

5. Verify wires and connectors between the Maxwell connector P6 and the power cord.

6. Replace all parts and panels before operating.

7. Plug in range or reconnect power.

8. Press CANCEL/OFF key, program and start the Clean mode, and observe for 1 minute to ensure that operation is normal.

9. Verify operation is normal. Go to diagnostics screen and verify that there are no fault codes.

10. Press DELAY START to clear the fault code.

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FOR SERVICE TECHNICIAN’S USE ONLY

Component Testing Chart – Electric Maxwell Models with AquaLift® Technology

NOTE: This Component Testing Chart covers different models. The range may have some or all of the components listed in the following chart.

Do not continue with the diagnosis of the appliance if a fuse is blown, a circuit breaker is tripped, or if there is less than 240 +10%/-15% V power supply at the wall outlet.

When checking for proper voltage, complete the following steps:

1. Unplug range or disconnect power. 3. Plug in range or reconnect power and confirm voltage reading.

2. Connect voltage measurement equipment. 4. Unplug range or disconnect power after performing voltage measurements.

Component From To Resistance: Measure Notes Nominal Voltage P7-4 Without Power Applied 2 VDC with door open Door position Measure resistance with oven light 0 VDC with door closed switch P5-4 P7-5 Door open = open circuit switch open and door closed. N/A Door closed = closed circuit Measure voltage with oven light 120 VAC Oven light switch closed or door open. N/A WH (Neutral) 0-40 Ω nominal Thermo fuse will open if it P6-3 exceeds temperature. N/A Measure for a closed circuit Thermo fuse P1-3 P6-1 Closed circuit (normal) (0 resistance). 240 VAC when P10-4 Disconnect connector P10 from energized Oven sensor P10-3 Open circuit if temperatures control before measuring sensor. at the back of the oven Measure only resistance, not voltage. 240 VAC when exceed 360°F (184°C). For voltage measurements in Bake energized mode, Bake cycle must be operating. 1000-1200 Ω at N/A room temperature For voltage measurements in Broil mode, Broil cycle must be operating. 120 VAC Bake element P15-1 P2-3 10-40 Ω nominal. Check both P4-2 P3-1 and P3-2 terminals – Disconnect connector P10 from 120 VAC Broil element P15-1 P10-2 one open circuit and one control before measuring warming 120 VAC closed circuit. drawer temperature sensor. Warming drawer P10-1 Measure voltage with Warming Normal = Infinite sensor (on some 10-40 Ω nominal. Check both Drawer ON. resistance models) P3-1 and P3-2 terminals – Normal = 0 resistance one open circuit and one closed circuit.

1000-1200 Ω at room temperature

Warming drawer P4-2 WH (Neutral) 15-20 Ω nominal element (on P6-3 some models)

Convection P5-3 WH (Neutral) 85-90 Ω Convection fan runs in Convection fan motor P6-3 Bake mode. WH (Neutral) 16 Ω nominal Convection P1-1 P6-3 Convection element will cycle on element (on Normally open switch closes and off. Convection Bake cycle some models) Term 1B at 150°F (65.6°C) to turn on must be operating. or H hot surface indicator light. Limiter switches Term 2B Normally closed switch opens or S Term 2A or 2 at 1050°F (566°C).

Term Single – 1A’, Dual – 4/4A or 3/1, Triple – P1

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Quick Connect Plugs

For controls (Plugs shown with wires for For Cooktop optional features)

P5 (Blue) P7 (Black) BK/W

BK/ OR WH OR GY BK YL YL

BK R

P2 (Red) P1 (Blue) BU BK

BK RD BK/ YL RD/ OR/ Right Side Left Side WH WH BK Cooktop Cooktop

P10 (Yellow) P6 (Red) P15 (Natural) P4 (Green) GY BK V V GY GY BK WH RD/ RD BK/ BU T WH WH W

Warm Zone Cooktop

Maxwell Control (Electric Models)

P5 P6

Blue Red

P12 Black

P15 P2 P1 P4 P9 P7 P10 Natural Natural Thermofuse Red Blue Green Black Yellow

Connect Pin Function Connect Pin Function P1 (Blue) P6 (Red) 1 Control L1 input 1 Convection Element P7 (Black) 3 Control neutral P2 (Red) P9 (Natural) 4 Door switch common 3 Warming drawer – L2 input P10 (Yellow) 5 Door position switch P4 (Green) 1 Ground (on some models) 4 Warming drawer P12 (Black) 2 Data 5 V logic P5 (Blue) P15 (Natural) 1 Oven temperature sensor 1 Bake 2 Oven temperature sensor 6 3 Warm drawer temperature sensor 3 Bake 4 Warm drawer temperature sensor (3 and 4 on some models) 4 Convection element – L1 input 1-22 Keyboard interface 1 DLB to bake/broil 1 Broil – L1 input 2 DLP to L2

2 Broil

3 Convection fan

4 Oven Light

7 Warm zone

9 L1 input

FOR SERVICE TECHNICIAN’S USE ONLY

Notes

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For patent information, please see Pat. www.patent-listing.com W11503312A NOTE: This sheet contains important Technical Service Data. W11503312A FOR SERVICE TECHNICIAN ONLY ©2020 All rights reserved. DO NOT REMOVE OR DESTROY

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