Electric forklift fails to move forward and backward?
Summary:The reasons and maintenance methods for electric forklifts that cannot move forward or backward are mainly as follows, which are for your reference an...
The reasons and maintenance methods for electric forklifts that cannot move forward or backward are mainly as follows, which are for your reference and hope to be useful to you.1. The battery of the electric forklift is insufficient or invalid. Maintenance method: charge in time, if it cannot be charged, check whether the forklift charger or forklift battery is faulty according to the following points. Check if the forklift charger is faulty? If so, find the manufacturer to solve it. After connecting the forklift charger, use the clamp meter to measure whether there is power output? Check whether the lower charging terminal is loose or oxidized. If there is any, it will cause poor contact and also cause the charging to fail. Has the forklift battery been placed for too long without being charged, resulting in serious vulcanization of the battery pack substrate? Use a multimeter to measure whether the voltage of the forklift battery meets the standard voltage of the battery. After the above exclusion is completed, it still does not work, find the manufacturer or professional maintenance.2. The electric forklift travel control micro switch is loose. Maintenance method: Tighten the screws.3. The DC contactor of the electric forklift fails to be repaired and replaced.4. The electric control board of the electric forklift is damaged, and the control board is repaired or replaced by professionals. If you need to check and maintain, you can refer to the following points: whether the surface of the main board of the forklift truck is burnt, burnt, blistered, exploded, the board surface is broken, the socket is corroded, etc. Multimeter measurement method: whether the +5V, GND resistance is too small (below 50 ohms). Power-on inspection: If it is clear that the board has been damaged, the original voltage can be slightly increased by 0.5-1V, and the IC on the board will be washed by hand after turning on, so that the faulty chip will heat up, so as to sense it. Logic pen inspection: Check and drain the suspected IC input, output, and control poles to check the presence and strength of signals. For the suspected chip, according to the instructions of the manual, first check whether there is a signal (wave pattern) at the input and output terminals. The possibility of bad is extremely high, there is no control signal, trace to its previous pole, until the damaged IC is found.5.forklift drive motor failure, check the following points and focus on maintenance. The forklift drive motor cannot be started, which may be caused by a blown fuse, a blocked control circuit, a serious short circuit or open circuit in the motor winding, a short circuit between the commutator segments, poor contact of the brush, heavy load or mechanical damage such as bearings.The abnormal speed of the forklift drive motor may be caused by short circuit or open circuit of the winding, incorrect position of the brush and overload, damage to the bearing, and low power supply voltage. The sparks of the forklift drive motor brushes may be caused by the poor contact of the forklift brushes, the uneven surface of the commutator, the incorrect position of the brushes, the unclean surface, the short circuit of the commutator segment or the short circuit of the motor winding.