Section 8.Theory of OperationModel 6210 Maintenance Manual

Emergency Reverse

If the emergency reverse button (belly button) hall effect switch is closed with the control arm lowered in travel mode, the control system activates an immediate, rapid acceleration in the reverse (forks-first) direction. The following occurs:

•The emergency reverse travel instruction is transmitted through the CAN-bus to the traction amplifier.

•Travel and speed inputs to the traction amplifier ar e ignored.

•The traction amplifier provides maximum torque inputs to the traction motor immediately after the emergency reverse button is activated.

•Travel in reverse (forks-first) direction continues until the emergency reverse button is released.

When the emergency reverse mode is activated, the TA ceases to respond to the normal travel command from the directional/speed control. To reset the truck for normal travel, return the directional/speed control to the neutral position and cycle the brake ON/OFF.

Electric Brake Release Switch

A manually activated Electric Brake Release Switch (SW3) has been added. Arm angle proximity switch SW2 is supplied B– at SW2-3 any time the battery is plugged in. SW3 is supplied with B+ from fuse FU2 any time the battery is plugged in and the Main ON/OFF switch (SW1) is in the ON position. To release the brake, SW2 must be open with low voltage at brake switch inputs, JP1-9 and JP1-24 (logic low). A rising edge at JP1-33 while JP1-9 and JP1-24 are at logic low is required to enter brake release mode. The brake release mode cannot be entered if SW3 is closed during key-on or while the brake switch inputs are at logic high (control handle is in the driving position). While in brake release mode, the arm angle proximity switch (SW2) still controls the brake. The brake is released when the brake switch inputs, JP1-9 an d JP1-24, are at logic high (tiller in driving position). The brake is engaged with the brake switch inputs, JP1-9 and JP1-24, are at logic low (tiller in brake position). To exit brake release mode at any time, open the brake override switch (SW3).

Truck Starting

To start the truck, the battery is plugged in, the Main ON/OFF Switch is put in the ON position. If the optional keypad is present on the control handle, enter the PIN key code and then press the green ON ( |) key.