SportsArt Fitness T645, Repair Manual, Page: 31 / 52

Troubleshooting
Model: T645
Malfunction: ERROR_3_1_
Circumstance: Turn off unit. Incline does not return to level.
Possible cause: 1. When the treadmill starts, the incline lowers,
activating the zero switch, calibrating the incline.
2. Drive board or motor malfunction
3. If the incline was at the highest position when it
hit the zero switch, but the zero switch didn’t react,
the zero switch is malfunctioning.
Troubleshooting: 1. Touch the incline motor. Is it hot? If so,
the drive board is malfunctioning. Replace the
drive board.
2. Turn on unit. Does the incline operate downward?
If not, the incline and drive board could be defective.
3. Test the zero switch. Does it switch on/off?
3-9-1
SAC Drive Board
Display board
Zero
SW AC Incline
Unit
Zero switch
Zero switch
Position Incline Zero switch Drive board
LED
0% Hits switch on lit
1-15% Does not hit
switch
off not lit
Incline voltage
Direction incline cable Incline voltage
up White - Black 110v or 220v
down White - Red 110v or 220v