Autoquip FREIGHTLIFT FL4M - Manual (Page 93)

93
DANGER !
To avoid personal injury, NEVER go under the lift platform until it is securely
blocked (See "Blocking Instructions" section) and the load is removed.
Troubleshooting and maintenance on the lift should only be performed by
qualified service technicians!!
Never walk out onto a jammed carriage until it has been properly blocked or
secured from further movement (See “Blocking Instructions” section)
Maintenance personnel should always speak to the operator(s) of the lift prior to
troubleshooting – to gain insight into the potential cause(s) of the problem.
PROBLEM POSSIBLE CAUSE AND SOLUTION
Freightlift will not raise
(motor not running or
“humming”).
WARNING! The lifting
chains may be
disconnected and slack
chain sensing switches
missing or
malfunctioning. Check
while standing near
(but NOT on) the lift
carriage and correct as
necessary – once
carriage has been
blocked in place.
WARNING! a safety
device may have been
activated – if you are
not familiar with how
safety devices interact
with the operation of
the lift, you must find
someone who does.
Or, call Autoquip
Customer Service at
888-811-9876.
 A slack chain sensing switch is activated due to a slack
or broken chain condition, or the sensing switch is
malfunctioning or is out of tolerance. Check and/or re-
establish chain tension, or check & repair or adjust
sensing switch(es) as required per “Installation” section.
 The Electric Current Sensor (ECS) has tripped due to an
excessive or jammed load on the carriage. Reduce load
to within rated capacity, or follow procedure to free the
jammed load (See “Installation” section for procedure)
 The counterweight sensing switch, over-travel switch, or
other safety status switches/sensors may have been
tripped. Investigate cause and eliminate the condition
which has caused them to trip.
 The level limit switch tripped or is malfunctioning,
preventing the “UP” command. Check with the lift at a
lower level on stops.
 The emergency stop button may be depressed or
jammed. Check all pushbutton stations. Repair / replace.
 The main disconnect switch / distribution panel circuit
breaker is tripped or a fuse is blown. Check and reset or
replace as necessary.
 A door with status switch is open, or switch or interlock is
malfunctioning or is out of tolerance. Close door, or
check and repair or adjust as required per gate manual
(shipped separately – when gates supplied by Autoquip)
 The push button / circuit is malfunctioning. Check
components and circuit. Repair or replace.
 The motor starter overloads (MSO) have tripped. Check
and reset. If it trips again, check for cause in the motor
circuit.
 The control transformer fuse is blown. Check and
replace.
TROUBLESHOOTING ANALYSIS