③ Sparks generated by forklift drive motor brushes may be caused by poor contact of forklift brushes, uneven commutator surface, improper brush position, dirty surface, commutator short-circuit or motor winding short-circuit. ② The abnormal speed of the forklift drive motor may be caused by short-circuit or open circuit of the winding, incorrect brush position and overload, damage to the bearing, low power supply voltage, etc. ① The forklift drive motor cannot be started, which may be caused by blown fuse, blockage of control circuit, severe short circuit or open circuit of motor winding, short circuit between commutator segments, poor contact of brushes, heavy load or mechanical damage such as bearings. Forklift drive motor failure, check the following points and focus on repairs. Trace to its previous pole until you find the damaged IC.ĥ. If there is this IC is probably broken and there is no control signal. ![]() ![]() If there is input or output, check the IC control line signal (clock), etc. According to the instructions in the manual, first check whether there is a signal (waveform) at the input and output terminals of the suspicious chip. ④Logic pen check: check whether the signal of the key suspicious IC input, output, and control terminal is present, and the strength, etc. ③ Power-on inspection: For the obviously broken board, you can slightly increase the original voltage by 0.5-1V, and rub the IC on the board after power-on, so that the problematic chip will heat up, which will be sensed. ② Multimeter measurement method: Whether the +5V and GND resistance are too small (below 50 ohms). on the surface of the forklift main board. ① Check whether there is burnt, burnt, blistering, explosion, board surface damage, rusty socket, etc. For inspection and maintenance, please refer to the following points: If the electric control board of the electric forklift is damaged, the electric control board should be repaired or replaced by professionals. The DC contactor of the electric forklift is faulty and needs to be repaired and replaced.Ĥ. The driving control micro switch of the electric forklift is loose. Find the manufacturer or professional repair.Ģ. ⑥ After the above exclusion is completed, it still doesn't work. ⑤ Use a multimeter to measure whether the voltage of the forklift battery meets the standard voltage of the battery. ④ Has the forklift battery been left for too long, causing serious vulcanization of the battery pack base material? ![]() ![]() If there is, it will cause poor contact and unable to charge. ③ Check whether the charging terminal is loose or oxidized. ② After the forklift charger is connected, is there an electrical output with a clamp meter? ① Check whether the forklift charger is faulty? If so, find an electric forklift manufacturer to solve it. If it cannot be charged, please check whether the forklift charger or forklift battery is faulty according to the following points. The battery of the electric forklift is insufficient or invalid. In addition, I have attached a solution, I hope it will be useful to everyone.ġ. Why does the electric forklift fail to move forward and backward? What is the solution? There are roughly several reasons why electric forklifts cannot move forward and backward.
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