Maytag 111405-1 Service Manual download pdf (Page 4)

Component Testing

WARNING

To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit, unless test

procedures require power to be connected. Discharge capacitor through a resistor before attempting to service.

Ensure all ground wires are connected before certifying unit as repaired and/or operational.

16021730 Rev. 0

Component Description Test Procedures

Variable Capacity

Compressor

When compressor electrical circuit is

energized the DC powered compressor

is started at high speed or 4500 RPM

down to 1600 RPM. For low speed from

the compressor PCB board.

Resistance test

1. Disconnect power to unit.

2. Remove leads from compressor terminals.

3. Set ohmmeter to lowest scale.

4. Check for resistance between any two terminals. Resistance should be equal

between any two terminals.

5. If either compressor winding reads open (infinite or very high resistance) or

dead short (0 ohms), replace compressor.

Ground test

1. Disconnect power to refrigerator.

2. Remove compressor leads and use an ohmmeter set on highest scale.

3. Touch one lead to compressor body (clean point of contact) and other probe

to each compressor terminal.

• If reading is obtained, compressor is grounded and must be replaced.

Operation test

If voltage and motor winding tests do not show cause for failure, perform the

following test:

1. Activate the Diagnostic test mode (See Diagnostic test mode section)

2. Activate Test mode #16 (which is High Speed for compressor)

3. Check the A/C voltage between pins 1 and 2 of JP10 (Voltage should be

approximately 2.3VAC)

4. Verify that line voltage is available to Compressor PCB at CNO1 between

pins 2 and 5 If AC voltage is there.

5. Check voltage at CNO5 at pins 1 and 6 voltage should read approximately

230VAC

6. Check Voltage at CNO5 at pins 1 and 3 voltage should read approximately

230VAC

7. Check Voltage at CNO5 at pins 3 and 6 voltage should read approximately

230VAC

8. The readings at all three above readings should be the same if not bad

PCB board

9. If voltage is the same suspect a failed compressor.

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Maytag 111405-1 Service Manual Page 4

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