Fault Troubleshooting:
(1) Failure to power on, indicator light not lit:
a. Check if there is power input.
b. Check if the indicator light bulb is loose or burnt out.
c. Check if the overload protector has tripped.
d. Verify if the ON-OFF switch contact is normal.
e. If the V.R. (Variable Resistor) second pin is damaged, the device may not power on, but the indicator light will be on.
(2) The motor does not work when the joystick is moved to the right or left:
a. Check if the right or left limit switch is stuck or damaged.
b. Ensure the handle is not loose, causing insufficient downward angle.
c. Inspect if the carbon brushes are making proper contact with the rotor or if they are worn out or broken.
d. Check if the internal wiring and printed circuit board are loose.
e. Examine if the DC (Direct Current) switch has poor contact or is damaged.
f. There may be damage to the circuit board.
(3) Irregular speed control or only high-speed operation:
a. Check if the fast button is jammed with iron filings and cannot return to its position.
b. Verify if the V.R. function is working correctly.
c. Ensure that the electrical wires are not loose.
d. Check for short circuits or breaks in the stator windings.
(4) The protection switch frequently trips or instantly trips during normal use:
a. There may be a short circuit in the motor rotor or stator, requiring replacement of the coils.
b. The DC snubber on the circuit board is penetrated, necessitating the replacement of the circuit board.
c. The carbon brush holder is under high voltage and has broken down, requiring replacement.
d. The D.O.L (Direct-On-Line starter) is damaged.
(5) Leakage of electricity:
a. Check the limit switches.
b. Remove the carbon brushes and use an ohmmeter to measure whether the carbon brush holder is penetrated or short-circuited with the outer shell.
c. Inspect whether the circuit board is in contact with or short-circuited with the outer shell.
