Autoquip FREIGHTLIFT FLT - Manual (Page 70)

70
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!!
PROBLEM POSSIBLE CAUSE AND SOLUTION
Unit will not raise (motor not
running or “humming”).
.
• The emergency stop button may be depressed
or jammed. Check all push-button stations.
Repair as necessary.
• The gate or door is not closed. Check and close.
• The main line disconnect switch is open (off).
Check and close (on).
• The main distribution panel circuit breaker is
tripped or a fuse is blown. Check and reset or
replace as necessary.
• The gate status switch or door interlock is
malfunctioning or is out of tolerance. Check and
repair or adjust as required.
• The main line fuse disconnect fuse is blown.
Check and replace.
• The “UP” push button or circuit is
malfunctioning. Check at the other push button
station for “UP” function. 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.
• The motor starter coil (MI) has burned out.
Check and replace. (Will usually blow the control
transformer fuse.)
TROUBLESHOOTING ANALYSIS