Troubleshooting guide – Losi LOSB0112 User Manual
Page 8

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8
EN
Many questions are the result of simple user errors or minor adjustments which
are easily addressed. If after reading below you cannot resolve your problem,
contact the appropriate Horizon product support center.
Steering servo operates but the motor does not run
• Reprogram the ESC by following the programming instructions.
• Confirm the servo is properly connected to the throttle channel on the
receiver.
• Damaged motor: Test motor independently, repair or replace as needed.
• Vehicle battery voltage is low: Charge as needed.
• ESC overload protection is enabled: Check motor and connections.
• Transmission is damaged: Check transmission gears, spur gear and pinion
gear for damage.
Steering and motor do not function
• Servo and ESC are not properly connected to the receiver: Check polarity of
the connectors to the receiver.
• Transmitter batteries or vehicle battery pack discharged: Recharge or
replace as needed.
Full speed not attainable
• ESC programmed incorrectly: Reprogram the ESC.
• Check battery connectors for damage.
• Vehicle battery is weak: Recharge vehicle battery.
Vehicle will not reverse
• Confirm the throttle trim is at neutral.
• Confirm the ESC is not in Forward Only mode.
• ESC is not calibrated correctly: Reprogram the ESC.
Spur gear is damaged repeatedly
• Improper gear mesh.
• Slipper clutch is not adjusted correctly.
Motor operates backward
• Motor is incorrectly connected to the ESC. Confirm the black wire on the
motor is connected to the black wire on the ESC.
Motor starts running as soon as the battery is connected
• Always power on the transmitter before powering on the vehicle.
• ESC is damaged and needs to be replaced.
Motor slows but will not stop
• Throttle trim is adjusted incorrectly.
• ESC program does not match transmitter: Reprogram the ESC.
Reduced radio range
• Motor capacitors broken/missing: Repair or replace.
• Electrical noise from the motor: Move the receiver away from ESC, motor
and wiring.
• Transmitter batteries are weak: Replace AA batteries.
Transmitter does not power on.
• Confirm the AA batteries are installed correctly.
• Replace AA batteries in the transmitter.
Troubleshooting Guide