AAQ AL-4000A, Installation Manual & Operation Instructions

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Trouble shooting
A list of possible troubles and solutions is given below
TROUBLE POSSIBLE CAUSE SOLUTION
The
hoist
does not work
The main switch is not turned
on
Turn the switch on
There is no power Check Power on to the restore if
necessary
The electrical wires are
disconnected
Replace
Fuses are blown Replace
The
hoist
does not raise
The motor direction of rotation
is not correct
Interchange the two phases on
the main switch.
The oil in the hydraulic unit is
not sufficient.
Add some hydraulic oil
The UP button is faulty Check UP button and
connection for proper
operation. Replace, if needed.
The maximum height limit
switch is faulty.
Check the switch and relevant
connection for proper
operation. Replace, if needed.
The lowering solenoid valve
does not close
Check and clean, if dirty, or
replace, if faulty.
The suction pump filter is dirty Check and clean if needed.
The lifting capacity is not
sufficient
The pump is faulty Check the pump and replace, if
needed
Oil leakages in hydraulic circuit Check the circuit for any leakage
The
hoist
does not lower
when the DOWN button is
pressed
The lowering solenoid valve
does not work properly
Verify if it is powered and check
magneto for damage (replace if
disconnected or blown)
Safety solenoid valve is jammed Verify if it is powered and check
magneto for damage (replace if
disconnected or blown)
The DOWN button is faulty Replace the DOWN button
Carriages do not stop in
standing position
The lowering and solenoid
valves stay opened.
Verify that solenoid valve sliders
are not blocked
Leakage in the hydraulic
pipelines.
Check connections for proper
tightening and tubes for
damage(replace if damaged)
Hydraulic cylinders are faulty Check and replace if needed.
The
hoist
does not lower smoothly Presence of air in the hydraulic
system
Bleed the hydraulic system.
Lifting is not synchronized
Check cable adjustments for
correct engagement on the locks.
Adjust the cable nuts at the top
of the column.
The
hoist
does not stop at
safety height
The safety height limit switch
does not work
Check the limit switch and
replace if needed.
The motor does not stop when
the
hoist
reaches it maximum
height
The maximum height limit
switch does not work
Check the limit switch and
replace if needed.
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