Autoquip FREIGHTLIFT FL4M - Manual (Page 84)

84
DOWN
1. When a DOWN button on a push button station is pressed & released, the control
(secondary) circuit to the motor starter (motor contactor) is completed. The coil of
the motor starter magnetically closes the high (primary) voltage contacts completing
the power circuit to the motor causing
the reversing motor starter to engage and
start the motor.
2. When the carriage arrives at the landing it has been called to, the level limit switch
is activated by the striking of a mechanical cam attached to the side of the carriage.
When activated, this switch cuts the power to the motor circuit, the motor starter
contacts drop out (open), the motor stops, and the motor brake is automatically
applied thereby stopping and holding the carriage at that landing.
3. A counterweight sensing switch has been provided to sense whether the
counterweights attempt to be pulled out the top of their guide tubes in the event
that: 1) the carriage is interfered with during its downward travel and physically
stops downward movement prior to reaching the landing it was called to, and 2) the
slack chain sensing switch(es) do not cut off power to the motor when this occurs.
When activated, the counterweight sensing switch cuts off electrical power to the
motor, and the motor brake automatically applies and holds the carriage at that
landing.
NOTE: Always find out why the counterweight sensor(s) are activated, and be sure
to correct the problem (carriage interference, etc.) before making the lift operational
again.
EMERGENCY STOP
Press the red emergency stop button to stop all vertical movement of the FREIGHTLIFT
at any time for any reason.
1. The emergency stop button will interrupt all electrical control functions when it is
activated. Movement of the carriage will cease, regardless of its direction.
2. After the emergency stop button has been reset (twist), any level button may be
pressed to continue travel.
NOTE: Always find out why the E-Stop button may have been pressed, and be
sure to correct the problem (malfunction, interference, etc.) before making the lift
operational again.
OPERATING INSTRUCTIONS