Harrington Hoists and Cranes MR Trolley - (MR2) - Manual (Page 37)

4.3 Trolley and Hoist Controls
4.3.1 Emergency Stop Button – Press the Emergency Stop Button to perform an emergency stop and lock-
out of hoist motion controls or to reset the VFD as shown in Figure 4-1. Turn the Emergency Stop
Button clockwise to unlock the controls and allow hoist operation. “Hbb” will appear on the dual speed
unit’s VFD display when the Emergency Stop Button is depressed.
4.3.2 Single Speed Pendant Control - When using the pendant control depress the Up button to raise the
hoist's hook or the Down button to lower the hoist's hook as shown in Figure 4-1. Depress the Forward
and Reverse buttons to move the trolley horizontally. To stop motion release the buttons.
4.3.3 Dual Speed Pendant Control – Pendant controls supplied with dual speed hoists or trolleys have two
step control buttons. For low speed depress the button to the first step and for high speed depress the
button fully to the second step. Use the Up button to raise the hoist's hook or the Down button to lower
the hoist's hook as shown in Figure 4-1. Depress the Forward and Reverse buttons to move the trolley
horizontally. To stop motion release the buttons.
4.3.4 Trolley with Two Button Pendant – When a motorized trolley is supplied with a two button pendant, the
pendant buttons control the trolley's horizontal motion in the forward and reverse directions. Single and
dual speed buttons function identical to the four button pendant described above.
4.3.5

Make sure the hoist and/or trolley motor completely stops before reversing
direction.
Figure 4-1 Push Button
Pendant Control
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