[pdf-embedder url=’http://appliancetechmanuals.com/wp-content/uploads/whirlpool/tech-sheet-12827918.pdf’ title=’tech-sheet-12827918′]Control Board Troubleshooting Bottom Mount Refrigerator Technical Information

! WARNING Due to a possibility of personal injury or property damage, always contact an authorized technician for service or repair of this refrigerator. To avoid risk of electrical shock that can cause death or severe personal injury, disconnect unit from power before servicing unless tests require power. Discharge capacitors through a 10,000-ohm resistor before handling. Wires ! CAUTION removed during disassembly must be replaced on correct terminals to ensure proper grounding and polarization. All safety information must be followed as provided in Service Manual 16022769. 3. Release the refrigerator door light switch.

4. The control will display Fd to confirm entry into the Forced Defrost Mode.

Freezer Refrigerator ! WARNING

F To avoid risk of electrical shock that can cause death or severe personal injury, disconnect unit from power before servicing unless testing is required. Discharge capacitors through a 10,000 ohm resistor before handling. Wires 5. Entry is confirmed by pressing the Refrigerator Down key once more. The unit is off and in the Defrost removed during disassembly must be replaced on correct terminals to ensure proper grounding and polarization.

Mode.

Note: All control functions will be turned off (Compressor, Defrost, Evaporator Fan, the damper will

remain in its current position)

6. The control will default to the short run period test as shown here No-Load Performance, Controls in Normal Position

Freezer Refrigerator Refrigerator Center

S Compartment Freezer Compartment

Note: You can toggle between the (S)hort and (L)ong test mode by pressing the Refrigerator UP Key. Kw/24 hr ±0.4 Percent Run Time Cycles/24 hr Average Food Average Food ±10% ±25% Temperature ±3°F Temperature ±3°F

Long Test mode is used for factory test and should not be used in the field. Ambient °F 70° 90° 110° 70° 90° 110° 70° 90° 110° 70° 90° 110° 70° 90° 110° 20 cu ft 1.0 1.60 2.3 0 Freezer Refrigerator

L 28 48 65 35 39 25 38 36 35 0 0

7. Once the desired mode is displayed, confirm the forced defrost by pressing the Refrigerator down Key once. Temperature Relationship Test Chart

The defrost will begin immediately and the display will return to a normal operating display with set point values. Evaporator Evaporator Suction Line Average Total Suction Head Pressure ±7°F Wattage ±10% ± 5 PSIG Freezer Refrigerator Outlet Inlet Pressure ±3°F ±3°F ±2 PSIG

4 4 Ambient °F 70° 90° 70° 90° 70° 90° 70° 90° 70° 90° 70° 90° 20 cu ft 8. Close the Refrigerator door(s). You are in the defrost mode -20 -17 -20 -17 85 105 135 140 6″(Vac.) 0 87 137 Note: Forced Defrost mode can be exited at any time prior to step 7 by closing the Refrigerator Door(s). Schematic Service Test Mode:

The service test functions are performed using the refrigerator display and keypad. Enter the Service Test Mode by performing the following sequence of events

1. Hold the refrigerator door light switch closed.

2. Press the Refrigerator Temperature Up keypad 3 times consecutively.

Note: The 3 Keystrokes must be done consecutively and within 10 seconds.

3. Release the refrigerator door light switch.

4. The control will display SE to confirm entry into the service mode.

Freezer Refrigerator

S E

5. Entry to the Service Menu is confirmed by pressing the Refrigerator Up key once more.

6. The control will display its software version for 3 seconds.

Freezer Refrigerator

2 5

7. Following the software revision display the freezer display will read the first test number in the

diagnostic tree. The refrigerator display will be blank

Freezer Refrigerator

1

Note: All control functions will be turned off (Compressor, Defrost, Evaporator Fan, the damper will remain in its current position)

8. You are now in the SERVICES TEST operational mode and may use the diagnostic tests The Service Test Mode can be exited at any time by closing the Refrigerator Door(s).

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© 2004 Maytag Appliances Company © 2004 Maytag Appliances Company

Component Specifications Control Board Troubleshooting

! WARNING ! WARNING

To avoid risk of electrical shock that can cause death or severe personal injury, disconnect unit from power before To avoid risk of electrical shock that can cause death or severe personal injury, disconnect unit from power before servicing unless tests require power. Discharge capacitors through a 10,000-ohm resistor before handling. Wires servicing unless tests require power. Discharge capacitors through a 10,000-ohm resistor before handling. Wires removed during disassembly must be replaced on correct terminals to ensure proper grounding and polarization. removed during disassembly must be replaced on correct terminals to ensure proper grounding and polarization.

Programming Mode:

Component Specifications all parts Note: The Program Code is located on the Serial Plate on this unit after the word Code. Compressor run capacitor 115VAC/60HZ unless noted Compressor 220 VAC 1.Open the Fresh Food door and hold the Fresh Food door light switch closed while pushing the Freezer Volt…………………………………………….. Electric damper control Capacitance ……………………………….. 15 µfd ± 10% Temperature Down Key pad 3 times consecutively. Thermistor BTUH …………………………………………. 730 BTUH Note: The 3 Keystrokes must be done consecutively and within 10 seconds. Condenser motor Watt …………………………………………… Current Lock rotor ………………………… 60 Hz / 125 watts 2.Release the Fresh Food door light switch. Current Full load ………………………….. 19.0 amps± 15% Resistance Run windings ……………… 1.09 amps± 15% 3.The control will display PE to confirm entry into the programming mode. Resistance Start windings …………….. 3.33 ohms± 15% 4.28 ohms± 15% Freezer Refrigerator

Maximum closing time 36 seconds P E Temperature Rating 20°F- 110°F RPM 1 4.Entry is confirmed by pressing the Freezer Down key once more.

Temperature Resistance Note: All control functions will be turned off (Compressor, Defrost, Evaporator Fan, the damper will 77°F……………………………………………. 10,000 ohms remain in its current position) 36°F …………………………………………… 29,500 ohms 0°F……………………………………………… 86,300 ohms

Rotation (facing end opposite shaft) Clockwise 5.The control will display the current Program Code. This value should be validated with the Program Code RPM 1250 RPM printed on the unit serial plate. Watt……………………………………………. 4.2 W ±0.7 @ 115VAC Current ……………………………………….. 63 mA ± 15% @ 115VAC Freezer Refrigerator

2 5

Evaporator fan motor Rotation (facing end opposite shaft) Clockwise Note: If the Program Code is correct, the Programming Mode is exited by closing the Refrigerator door(s). Overload/Relay RPM…………………………………… 2800 RPM Watt……………………………………. 6.0 ±15% watts @ 115VAC 6.To set the desired Program Code number press the Freezer and Refrigerator UP keys. The Control board 2.67 amps± 15% Thermostat (Defrost) Ult. trip amps @ 158°F (70°C) ……….. 142°F ±16° corresponding digit will be advanced with each key press. Close temperature ……………………… 284°F ±9° Evaporator heater Open temperature………………………. 10 seconds ±5 7.Once the desired Program Code is displayed, press the Freezer DOWN Key until the Program Code Mullion Assembly w/ Heater 11 amps ±2amps Short time trip (seconds)……………….. 120VAC, 60 HZ begins flashing indicating it has been saved. Water valve, dual Short time trip (amps @77°F (25°C).. Light switch 120/240 VAC Note: If you attempt to enter an invalid Program Code the control will not save the new code, but will flash the old Light switch / Interlock Volt…………………………………………….. 495 watts See Control Board section for 10/5 amps code and this will be displayed. (The unit will NOT run with a Program Code of 00). diagnostics Open 8. Once the Program Code has been saved the Programming Mode is exited by closing the Refrigerator Volt ……………………………………………. Closed Watt …………………………………………… 115 VAC door(s). If the new code is incorrect this process should be repeated after closing the Refrigerator door(s). Current ……………………………………….. 435 ±5% watts @ 115VAC Resistance across terminals: 29 ±5% ohms The Programming mode can be exited at any time by closing the Refrigerator Door(s). Above 42°F ±5°……………………………. Below 12°F ±7° ……………………………. Defrost Operation:

Volt…………………………………………….. The Control Board adapts the compressor run time between defrosts to achieve optimum defrost intervals by Wattage………………………………………. monitoring the length of time the defrost heater is on. Resistance ………………………………….. After initial power up, defrost interval is 4 hours compressor run time. Defrost occurs immediately after the 4 hours. Note: Once unit is ready to defrost there is a 4 minute wait time prior to the beginning of the defrost cycle. Volt……………………………………… 120 VAC Optimum defrost is 15 minutes. Each additional minute the defrost thermostat remains closed, 1 hr. is subtracted from the previous defrost interval. Each minute the thermostat opens prior to optimum defrost, it extends the next defrost Wattage………………………………………. 10±.5 watts @ 120VAC interval 1 hr. When defrost thermostat opens there is a 4-6 minute drip time before compressor restarts or Control Resistance ………………………………….. 1440 ±5% ohms Board will terminate defrost at 25 minutes if defrost thermostat has not opened and will reset the defrost interval to the 8 hr. minimum setting. Resistance checked at leads at center of hinged side of Fresh 4 hours of continuous compressor run resets the next defrost interval to 8 hours and will initiate a defrost, if 8 hours of compressor run time has also occurred. Food door.

Volt 120 VAC

Watt 35 watts (Brown coil)

20 watts (Yellow coil)

Type…………………………………….. SPST NC Forced Defrost Mode:

Volt……………………………………… 125/250 VAC The forced defrost function is performed using the refrigerator display and keypad. Enter the Forced Defrost Mode by performing the following sequence of events: Current………………………………….. 8 / 6 amps

Type…………………………………….. SPDT NO/NC 1. Hold the refrigerator door light switch closed. Volt……………………………………… 125/250 VAC Current………………………………….. 5 / 2.5 amps

2. Press the Refrigerator Temperature Down keypad 3 times consecutively.

Note: The 3 keystrokes must be consecutive and within 10 seconds.

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© 2004 Maytag Appliances Company © 2004 Maytag Appliances Company

Wiring Diagram Control Board Troubleshooting

! WARNING ! WARNING

To avoid risk of electrical shock that can cause death or severe personal injury, disconnect unit from power before To avoid risk of electrical shock that can cause death or severe personal injury, disconnect unit from power before servicing unless tests require power. Discharge capacitors through a 10,000-ohm resistor before handling. Wires servicing unless tests require power. Discharge capacitors through a 10,000-ohm resistor before handling. Wires removed during disassembly must be replaced on correct terminals to ensure proper grounding and polarization. removed during disassembly must be replaced on correct terminals to ensure proper grounding and polarization.

See Note below Service Test 1 – Defrost Thermostat & Defrost Circuit Test about alternate wiring of Refrigerator door harness When selected this test will display the state of the defrost thermostat. In order to perform this test the defrost heater will

be energized. The test is activated and deactivated using the Refrigerator Up key. Once activated, this test must be

de-activated to move to another test number. The Freezer Up / Down keys allow selection of the test to be performed.

This test also allows observation and measurement of proper defrost function. You can observe defrost heat and voltages while the test is activated.

Freezer Refrigerator

1 O

DEFROST THERMOSTAT OPEN

Freezer Refrigerator

1 S

DEFROST THERMOSTAT SHORTED (CLOSED)

Service Test 2 – Compressor/Condenser Fan Test

When selected and activated this test will operate the Compressor/Condenser Fan circuit. You should evaluate proper

operation of the compressor and condenser fan. The Refrigerator Up key will toggle between “O” / “F” (ON & OFF)

the compressor drive circuit. The test must be “deactivated” or in the OFF position to move to another test selection.

Freezer Refrigerator

2 O

Freezer Refrigerator

2 F

OBSERVE COMPRESSOR & CONDENSER FAN FUNCTION

Service Test 3 – Evaporator/Freezer Fan Test

When selected and activated this test will operate the freezer fan. The Refrigerator Up key will toggle between “O” /

“F” (ON & OFF) the fan drive circuit. You will have to inspect the fan for proper function. The test must be “deactivated” or

in the OFF position to move to another test selection.

Freezer Refrigerator

3 O

Freezer Refrigerator

3 F

Note: In the event of excessive moisture on fresh food door mullion. The red and blue cabinet wires to door OBSERVE FAN OPERATION harness can be reversed to power fresh food door mullion heater continuously. This will help to reduce moisture on fresh food door mullion. See wiring alternate above for wiring in mullion heater for continuous operation.

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© 2004 Maytag Appliances Company © 2004 Maytag Appliances Company

Control Board Troubleshooting Control Board Troubleshooting

! WARNING ! WARNING

To avoid risk of electrical shock that can cause death or severe personal injury, disconnect unit from power before To avoid risk of electrical shock that can cause death or severe personal injury, disconnect unit from power before servicing unless tests require power. Discharge capacitors through a 10,000-ohm resistor before handling. Wires servicing unless tests require power. Discharge capacitors through a 10,000-ohm resistor before handling. Wires removed during disassembly must be replaced on correct terminals to ensure proper grounding and polarization. removed during disassembly must be replaced on correct terminals to ensure proper grounding and polarization.

Service Test 6 – Open Damper Test

Service Test 4 – Fresh Food Thermistor Test When selected this test will indicate the current position “O” / “C” (OPEN / CLOSED) of the refrigerator damper. The

When selected and activated this test will display Pass, Open, Short result for a test on the Fresh Food Thermistor Refrigerator Up key will toggle the damper open and closed. You must allow 1 minute for each attempt to change the

circuit as show below. The test is activated and de-activated via the Refrigerator Up key, and must be damper position. You should observe proper damper function. de-activated to move to another test selection. Freezer Refrigerator

Freezer Refrigerator 6 O

4 P Freezer Refrigerator

PASS RESULT 6 C

Freezer Refrigerator OBSERVE DAMPER FUNCTION

4 O ! CAUTION

OPEN RESULT Adjustments of Service Test 7 or Service Test 8 will alter the performance of the unit.

Freezer Refrigerator Service Test 7 – FF Performance Adjustment

4 S This test will allow adjustment of the control performance points. Each step will incrementally change the Refrigerator performance warmer 1° (towards 1) or colder 1° towards (9) as adjusted. The default value is 5.

SHORT RESULT The refrigerator / Up/Down keys are used to adjust the Performance Offset value.

WARMER Í(1 2 3 4 (5) 6 7 8 9) Î COLDER.

Service Test 5 – Freezer Thermistor Test Freezer Refrigerator

When selected this test will display Pass, Open, Short result for a test on the Freezer Thermistor circuit as 7 5

show below. The test is activated and de-activated via the Refrigerator Up key, and must be de-activated to move to another test selection. DEFAULT

Freezer Refrigerator Freezer Refrigerator

5 P 7 6

PASS RESULT COLDER The last FF Performance Offset value displayed before leaving test 7 will be saved when the refrigerator door(s) is closed. Freezer Refrigerator Service Test 8 – FZ Performance Adjustment

5 O This test will allow the adjustment of the control performance points. Each step will incrementally change the Freezer performance warmer 1° (towards 1) or colder 1° towards (9) as adjusted. The default value is 5.

The refrigerator / Up/Down keys are used to adjust the Performance Offset value.

OPEN RESULT WARMER Í(1 2 3 4 (5) 6 7 8 9) Î COLDER

Freezer Refrigerator

Freezer Refrigerator

5 S 8 5

DEFAULT

SHORT RESULT Freezer Refrigerator

8 4

WARMER The last FZ Performance Offset value displayed before leaving test 8 will be saved when the refrigerator door(s) is closed.

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© 2004 Maytag Appliances Company © 2004 Maytag Appliances Company