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Fan Motor

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Fan Motor Terminals

6 leads out ( 6 Wires )

1. Auxiliary or Starting

2. High Speed

3. Medium

4. Low Speed

5. Common 16. Common 2

5 leads out ( 5 Wires )

1. Auxiliary or Starting

2. High Speed

3. Medium

4. Low Speed

5. Common

4 leads out ( 4 Wires )

1. Auxiliary or Starting2. High Speed

3. Low Speed

4. Common

3 leads out ( 3 Wires )

1. Auxiliary or Starting3. Speed / Running

4. Common

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Identifying Fan Motor Terminals

Terminal Identity

Highest Resistance - Starting or auxiliary2ndHighest Resistance - Low Speed terminal

3rd Highest Resistance - Medium

4th Lowest Resistance - High Speed Terminal

No Resistance - Common 1

No resistance - Common 2

6 leads out ( 6 Wires )

1. Auxiliary or Starting

2. High Speed

3. Medium

4. Low Speed

5. Common 16. Common 2

12

34

56

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Aux - C1 100 ohms

Aux - C2 100 ohms

Aux - Hi 120 ohms

Aux - Med 140 ohms

Aux - Lo 160 ohms

12

34

Auxiliary

High

Med

Low

Common 1

100 Ohms

20 Ohms

20 Ohms

20 Ohms

1

2

3

4

5

6

6 leads out ( 6 Wires )

Common 21-6

1-5

1-4

1-3

1-2

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Auxiliary

High

Med

Low

Common 1

100 Ohms

20 Ohms

20 Ohms

20 Ohms

1

2

3

4

5

6

Common 2

Aux - C1 100 ohms

Aux - C2 100 ohms

Aux - Hi 120 ohms

Aux - Med 140 ohms

Aux - Lo 160 ohms 1-6

1-5

1-4

1-3

1-2

Get the highest Reading

Aux - Low 160 ohms

Aux - Med 140 ohms

Aux - High 120 ohms

Aux - C1 100 ohms

1st

2nd

3rd

4th

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Steps in Identifying Fan Motor Terminal

1. Prepare Multi Tester

2. Label terminals with numbers

3. Check Resistance of every pair of terminals4. Get the highest to lowest reading

Highest should be theAuxand Low speed

2ndhighest should be theAuxand Medium

3rd highest should be theAuxand High speed

5. Get the lowest reading

It should be between Common and High speed

The two common terminals must have no resistance

reading

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Auxiliary

High

Med

Low

Common 1

100 Ohms

20 Ohms

20 Ohms

20 Ohms

Common 2

comp

Selector Switch

Fan Capacitor

L

N

6 Leads Out

Comp

Hi

Med

Lo

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Auxiliary

High

Med

Low

Common 1

100 Ohms

20 Ohms

20 Ohms

20 Ohms

comp

Selector Switch

Fan Capacitor

L

N

5 Leads Out

Comp

Hi

Med

Lo

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Auxiliary

High

Low

Common 1

100 Ohms

20 Ohms

20 Ohms

comp

Selector Switch

Fan Capacitor

L

N

4 Leads Out

Comp

Hi

Lo

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Starting / Auxiliary

Common

Running

100 Ohms

20 Ohms comp

Selector Switch

Fan Capacitor

L

N

3 Leads Out

Comp

Fan

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20 Ohms comp

Selector Switch

L

N

2 Leads Out

Comp

Fan

L1