Section 8.Theory of Operation

Travel 8-6

•Battery under/over voltage: Less than +16 volts cuts down the output from the TPA and limits travel speed. Greater than +45 volts places the controller in a shut down condition.

•Under/Overtemperature: Overtemperature of the traction power amplifier is 185°F (85°C) and above. Overheating is unus ual, but can occur if the traction po wer amplifier is installed incorrectly or overloaded. At overtemperature, the drive current limit is linearly decreased from full set current limit down to zero. Plugging current is not reduced by any thermal conditions to allow full plugging strength at all times. When the traction amplifier is operating at less than -13°F (-25°C), the current limit is cut back resulting in reduced travel speed and acceleration.

*Disables PC contactor through PC DRIVE line. When the PC DRIVE line goes to 5 volts the PC opens and the STM tells the CM to display a code 2,2.

Model 5200 High-Level Orderpicker

Publication Number: 1043922B, Revised: 2 Sept 2015