Chapter B: Troubleshooting - Star Trac 4500 Owner's Manual

Troubleshooting
Star Trac recommends that you refer your questions about your
STAR TRAC 4500
TREADMILL
operation and suspected malfunctions to Star Trac's Service Hotline at
(800) 503-1221, or USA 1-714-669-1660. However, you may wish to investigate error messages
that appear on the Alphanumeric Display. You may do so by reviewing the information in
this section.
KEY DN: This error generally occurs when a key other than j|J, or ISTDP] is held pressed
while the ON/OFF switch is moved to ON. It may also happen if a key becomes stuck. When you
see KEY DN: Move ON/OFF switch to OFF; wait 2 seconds; move ON/OFF switch to ON. The
treadmill should be operational again. Notify Star Trac if additional assistance is needed.
NO STO: This error generally occurs when the Stop Switch is not connected tightly to the circuit
board of the Display Control Panel. It may also happen if the circuitry associated with the switch
develops a fault. When you see NO STO: Move ON/OFF switch to OFF; wait 2 seconds; move
ON/OFF switch to ON. Notify Star Trac if additional assistance is needed.
NO RPM and SP CNG: These errors generally occur when the running belt speed sensor is
disconnected, faulty, or misaligned relative to the revolutions-per-minute (RPM) sensor of the
motor. They may also happen if the speed sensor cable is damaged or if the Motor Control Board
(MCB) is misadjusted or faulty. When you see NO RPM or SP CNG: Move ON/OFF switch to
OFF; wait 2 seconds; turn ON/OFF switch to ON. Notify Star Trac if additional assistance is
needed.
EL STL, EL RNG, EL LOST and EL NOZ: These errors generally occur when the elevation
(incline) potentiometer is faulty or out of limits, or the elevation motor is disconnected or receiving
low power. They may also happen if the Motor Control Board (MCB) is faulty or the motor gears
are stripped. They are usually accompanied by failure of the treadmill to rise from an elevation
other than maximum (or descend from an elevation other than minimum), with attendant beep
indication, when |Q (or Q) is pressed. When you see El STL, EL RNG, EL LOST, or EL NOZ:
1. Move ON/OFF switch to OFF; press and hold [|J while moving ON/OFF switch to ON;
release [=]). See Motor Test Mode.
STAR TRAC4500 TREADMILL Owner's Manual GO