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Table of Contents
TECH SHEET - DO NOT DISCARD
Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or electrical shock.
PRECAUTIONS TO BE OBSERVED BEFORE
AND DURING SERVICING TO AVOID POSSIBLE
EXPOSURE TO EXCESSIVE MICROWAVE ENERGY
a. Do not operate or allow the oven to be
operated with the door open.
b. Make the following safety checks on all
ovens to be serviced before activating the
magnetron or other microwave source, and
make repairs as necessary:
1. Interlock Operation
2. Proper Door Closing
3. Seal and Sealing Surfaces (Arcing,
Wear & Other Damage)
4. Damage to or Loosening of Hinges &
Latches
5. Evidence of Dropping or Abuse
c. Before turning on microwave power for any
service test or inspection within the
microwave generating compartments,
POWER OUTPUT MEASUREMENT
The power output of the magnetron can be
measured by the following tap water
temperature rise test:
Be sure oven cavity is clean and cool (not
used recently).
Low voltage will lower the magnetron output.
1. Fill a glass beaker with 1000 ml (32 oz.) of tap
water. Stir the water with a thermometer
(digital recommended) and record the
temperature. This starting temperature should
be between 10°C (50°F) to 24°C (75°F).
FAILURE CODES/INDICATIONS
Display
Likely Failure Condition
Flashing
Power failure
colon ":"
-F2-
Membrane switch failure
-F6-
Microwave relay failure
FOR SERVICE TECHNICIAN'S USE ONLY
Electrical Shock Hazard
check the magnetron, waveguide or
transmission line and cavity for proper
alignment, integrity and connections.
d. Any defective or misadjusted
components in the interlock, monitor,
door seal, and microwave generation,
and transmission systems shall be
repaired, replaced, or adjusted by
procedures described in service manual
before the oven is released to the owner.
e. A microwave leakage check to verify
compliance with the Federal
performance standard should be
performed on each oven prior to release
to the owner.
f. Do not attempt to operate the oven if the
window area of the door is broken.
2. Place the beaker in the center of the oven.
3. When done, stir the thermometer through
4. Subtract the cold water temperature from
Recommended Repair Procedure
After a power failure, the colon ":" will be flashing. Press any key to
end this indication. The colon will then be steady when in stand-by.
Replace membrane switch. If problem persists, replace control board.
Check wiring to relay 4903 for short circuits. If wiring is OK, replace
control board.
Operate on HIGH power level for
60 seconds.
the water and record the temperature.
the warm water temperature to get the
temperature rise. Normal range is as
shown in the following table:
Voltage
(VAC under load)
120V
108V
PART NO. 8184997/4619-651-98301
PAGE 1
Temperature Rise
°C
°F
12 - 13
21 - 24
10 - 11
18 - 19
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Related Manuals for Whirlpool MH1150XMQ
Summary of Contents for Whirlpool MH1150XMQ
- Page 1 TECH SHEET - DO NOT DISCARD PAGE 1 Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY a.
-
Page 2: Schematic Diagram
PAGE 2 TECH SHEET - DO NOT DISCARD SCHEMATIC DIAGRAM 37 R / W 38 Y/G 19 BL 16 R 20 BL 26 W 7 BL 28 BR 29 G 40 R 41 R 1 BL PART NO. 8184997/4619-651-98301 FOR SERVICE TECHNICIAN'S USE ONLY... -
Page 3: Pictorial Diagram
TECH SHEET - DO NOT DISCARD PAGE 3 PICTORIAL DIAGRAM ORANGE/ RED WHITE YELLOW/ WHITE BLUE ORANGE WHITE WHITE BLACK BROWN WHITE WHITE WHITE WHITE WHITE GRAY ORANGE GREEN WHITE BROWN FOR SERVICE TECHNICIAN'S USE ONLY PART NO. 8184997/4619-651-98301... -
Page 4: Electronic Control Board
PAGE 4 TECH SHEET - DO NOT DISCARD PICTORIAL DIAGRAM ELECTRONIC CONTROL BOARD 5100 YELLOW COOKTOP LAMP WHITE INTERLOCK SECONDARY BLUE EXHAUST FAN THERMOSTAT TURNTABLE WHITE MOTOR HOOD FAN BLACK WHITE MOTOR H.V. TRANSFORMER INTERLOCK WHITE TURNTABLE PRIMARY MOTOR INTERLOCK ORANGE GREEN COOKTOP LAMP... -
Page 5: Parts Layout
TECH SHEET - DO NOT DISCARD PAGE 5 PARTS LAYOUT Hood Fan Cavity Thermostat 1 Not to Scale Motor Assembly Opens at 165°C (329°F) Closes at -35°C (-31°F) Cavity Thermostat 2 Opens at 125 C (257 F) Closes at -35 C (-31 F) Motor Capacitor Cavity Lamp Line Fuse... - Page 6 PAGE 6 TECH SHEET - DO NOT DISCARD TOUCH PANEL CONTINUITY DIAGRAM Example of use: When “Cook Time” is selected, a resistance of less than 200 ohms will be observed between 3 and 11 on the flex circuit connector. See diagram at right. COOK COOK WARM...
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Page 7: Troubleshooting Guide
TECH SHEET - DO NOT DISCARD PAGE 7 TROUBLESHOOTING GUIDE Complete the following steps before 4. All testing must be done with an checking microwave circuitry: ohmmeter having a sensitivity of 20,000 ohms per volt DC or greater, and powered 1. - Page 8 PAGE 8 TECH SHEET - DO NOT DISCARD BLOWER FAN ON LOW MICROCOMPUTER BOARD FUSE LOW VOLTAGE 20 AMP TRANSFORMER MOTOR CAPACITOR CAVITY FAN ON HIGH/LOW THERMOSTAT 1 RELAY RELAY CAVITY HOOD FAN THERMOSTAT 2 MOTOR Ω 79-119 (approx.) MICROWAVE PLUGGED IN - TIME OF DAY DISPLAYED MICROCOMPUTER BOARD CAVITY LOW VOLTAGE...
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Page 9: Cooktop Light On High
TECH SHEET - DO NOT DISCARD PAGE 9 COOKTOP LIGHT ON HIGH MICROCOMPUTER BOARD CAVITY THERMOSTAT 2 FUSE LOW VOLTAGE 20 AMP TRANSFORMER CAVITY THERMOSTAT 1 HOOD COOKTOP LIGHT ON LIGHT RELAY COOKTOP LIGHT ON LOW (NIGHT LIGHT) MICROCOMPUTER BOARD CAVITY FUSE THERMOSTAT 2... -
Page 10: Component Tests
PAGE 10 TECH SHEET - DO NOT DISCARD COMPONENT TESTS Discharge the high-voltage capacitor and Conduct a microwave energy test after remove the lead wires from the primary performing any tests or repairs to the winding of the high voltage transformer microwave. - Page 11 TECH SHEET - DO NOT DISCARD PAGE 11 COMPONENT TEST RESULTS Turntable Motor 1. Remove wire leads. Digital 2. Measure resistance Meter (ohmmeter scale: Rx1k): - Normal: 2.7k - 3.8k ohms (approximate) - Abnormal: Infinite Hood Fan Motor 1. Remove wire leads. 2.
- Page 12 PAGE 12 TECH SHEET - DO NOT DISCARD This page is intentionally blank. PART NO. 8184997/4619-651-98301 FOR SERVICE TECHNICIAN'S USE ONLY...