Sears 21-7119 Troubleshooting, Treadmill Will Not Start Verify Wall Outlet Has, Replace Motor

TROUBLESHOOTING

SPEED CONTROL SYSTEM TROUBLE-SHOOTING

	EB-O-B-LEM	:
1.	Treadmill Will Not Start.	1.		Verify Wall Outlet		Has	1, 'Reset Circuit Breaker or Replace
				Proper	Voltage.			Fuse.
		2.	i	Verify	Wall Outlet	Is Properly ,_2.		i Ground	Walt Outlet.
				Grounded.			i
		3.	i	Check Reset Switch.			i 3.	i Replace	Reset Switch.
				Check	On/Off Switch. Verify			Replace	On/Off Switch.
				Power	Key Activates On/Off
				Switch.

2.120 VAC Not Present at Motor Controller.

3.120 VAC at Motor Controller, But Motor Does Not Run.

4.Motor Runs Extremely Fast (Greater Than 90 VDC, M1 To M2).

5° Treadmill Has No Safety Start.

6.Flickering Monitor

7.No Distance Indicated

8.No High Speed / Low Speed Works

5.Verify Motor Controller Has

120 VAC, Line To Neutral And Line To Frame.

6, Check For Open Tachometer

Circuit

Remove Wall Plug From

Wall Outlet. Check Continuity

From Line Terminal of Plug

To Line Terminal Of Motor

Controller. Check Continuity

i Of Neutral Terminal of Plug To Neutral Terminal of Motor

I Controller.

1.

I CheckTerminalsVoltageM1 AndOn M2Motor.

•i 17 VDC At Low Speed.

70 VDC At High Speed.

I

i2. 'Check For Open Tachometer

i Circuit

j3• j Check For Loose Fan.

[1.

i Check For Shorted

J Tachometer.

I

12.

l Tachometer Magnet / _ Missing Fan.

Cheek For Missing

! 3. Check For Damaged /

lShorted Triac OnMotor Control Board.

I

1.Motor Controller Bad.

i1. Capactor Damaged On

I Interface Board

! 1. Reed Switch gives no reading.

i

!1. j Belt Tension Incorrect.

r

[ 2. i Lubrication Incorrect

!3. _ Check P2 To N On Interface

!Board (12.3 VDC At Max

I '1Speed).

14.1 70 Volts From M1 To M2 At I Max Speed.

'i a.) Voltage OK

! b.) Voltage Bad

5.Reset Reset Switch and Insert Power Key Fully•

6.Replace Motor.

Repair Or Replace Loose Wiring / Wire Terminals. Repair Or Replace Reset Switch / On/Off Switch.

I, 1. 'Check Motor Wiring.

Replace Motor.

i

I

i

2.Replace Motor.

i3. Tighten Fan.

I

r

! 1. x Replace Motor.

iP

2.Replace Tachometer Magnet /Replace Fan.

3.Replace Motor Control Board.

1.Replace Motor Controller

1. i Replace Interface Board

1 a. Align Reed Switch.

•'=b. Replace Reed Switch

l

I 1. } Adjust Belt Tension.

2.a.) Add Lubrication If Feels Dry. b.) Wipe Down If Dripping Wet.

3. Replace Interface Board.

:4. a) Replace Motor

b.) Replace Motor Controller

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