4.3 SME AC electric control assy
4.3.1 General description
Three-wheel AC controller assy is composed of three 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 three power modules.
4.3.2 Structure of controller
Connector, K1 control box Logic control box
Main contactor Power module Power module Power module
for right motor for lifting motor for left motor
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.
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