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PT4: Loss of Speed: Upper display lights, treadbelt moves, speed will not increase
Troubleshooting
59
6.18. PT4: Loss of Speed: Upper display lights, treadbelt moves, speed will not increase
With treadmill OFF press and hold down
INCLINE (+)
and
INCLINE (–)
keys and then
press and hold the
ENTER
button until screen changes to read Diagnostics. Press
ENTER
again to get into different diagnostic modes. Press
(+)
key to change modes.
When you get to “Calibration” press
ENTER
.
Refer to attached pictures for PWM’s LED locations.
Move the treadbelt by pushing it backward.
Do you get a speed reading on the display?
Does the Speed LED (#7) on
the lower board flicker when
the drive motor is moved by
hand?
Press
SPEED (+)
to top speed and verify
90VDC from the MOTOR (+) & MOTOR (–)
terminals. Did you measure approximately
90VDC?
Check connections for Speed
Sensor. If OK then replace
Speed Sensor.
YES
NO
NO
YES
Turn treadmill off. Test the Drive motor by hooking up the black and white drive motor
wires to the terminals on a 9VDC battery or drill battery. Did the motor run?
Replace PWM board BUT first
check Drive Motor and treadbelt
and deck for wear as these can
cause PWM failures
NO
YES
NO
1. Check Motor Brushes. If
faulty or worn replace
motor brushes.
2. Replace the Drive Motor.
Check connections from Motor
to PWM. Repair if necessary.
Turn on treadmill and test if it
will run correctly. If not check
Motor Brushes. If it still will not
run correctly, replace Motor.
YES
Check Wire Harness for
continuity, especially brown
wire. If bad replace. If good
replace Display Board.
Summary of Contents for L7 Club
Page 1: ...L7 L8 L9 Treadmill 90 Series Service Manual...
Page 4: ...Grounding Instructions 4...
Page 16: ...Introduction Recommended Tools 16...
Page 26: ...Electrical Reference Harnesses 26...
Page 30: ...Routine Maintenance Maintenance Checklist 30...
Page 102: ...Replacement Parts 102 Figure 8 8 Control Panel 17 16 15 13 14 12 11 11 9 5 3 7 6 2 4 8 1...
Page 116: ...Replacement Parts 116...
Page 119: ......