4.3 SME AC electric controller assy
(1) General description
Four-wheel AC controller assy is composed of two power inverters which separately
drives traveling and lifting motor, main control box, DC contactor, control aluminum sheet.
Main control box is connected with power source module, separately controlling two
power modules.
(2) Structure of controller
NOTICE: The electric control device contains capacitance which is discharged by
procedure through hydraulic motor when cutting off the key switch, then cut off the main
contactor to turn off the circuit power. Before doing the service, maintenance and
inspection for the forklift, firstly cut off the key switch for one minute, then discharge the
capacitance completely by process control.
4.4 Distribution and setting of sensor (AC)
4.4.1 General description
The electric forklift truck embodies many superior features, such as infinitely variable
lifting speed, steering speed adjuster and pedal setting, which can be adjusted and set in
real-time by EYE software. These functions have been initialized before delivery and
needn’t to be changed except the conditions as follows:
1. After long-term operation, the loose parts will be indicated with alarm codes.
2. The damaged electronic components are indicated with alarm code, replace them.
3. When replacing or disassembling other parts, after disassembling steering, lifting
potentiometers, it’s necessary to reset the value.