Autoquip FREIGHTLIFT FLH - Manual (Page 96)

96
PROBLEM POSSIBLE CAUSE AND SOLUTION
The Freightlift will not
lower (electrically).
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
.
 The emergency stop button may be depressed or jammed.
Check all pushbutton stations. Repair as necessary.
 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.
 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.
 Check for tripped velocity fuses.
A - air in the system will cause a lockup
B - heavy oil will cause a lockup.
C - Cold temperatures of -10 F or lower will
cause a lockup.
NOTE:
CONTACT THE AUTOQUIP SERVICE
DEPARTMENT BEFORE ATTEMPTING TO REPAIR THIS
PROBLEM!!
Motor labors or heats
excessively.
 The voltage may be low. Check at the motor terminals
while the pump is running under load. Do not check at the
line source or while the pump is idling. Inadequate wiring
can starve the motor even when the source voltage is
ample.
 The wiring may be incorrect. Be sure one leg of the motor
line is not connected to the ground prong. This can happen
particularly on 3-phase units using twist-lock plugs.
 The pump may be binding from oil starvation. This can
cause high internal heat. The pump can be irreparably
damaged by oil starvation and may have to be replaced!
The Freightlift does not
raise completely to the
upper level
(press “emergency
stop” button to stop
motor.)
 The carriage stops at the upper level are not adjusted
correctly
 The oil level in the reservoir may be too low. Check and
replace. Determine the cause of the oil condition and
repair.
 There is some sort of interference with the platform
carriage. Check and correct.
 The load exceeds the capacity of the unit. Lower the unit,
unload, and try again.
TROUBLESHOOTING ANALYSIS