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CHAPTER 10 – TROUBLESHOOTING
A list of possible troubles and solutions is given below
TROUBLE: POSSIBLE CAUSE: SOLUTION:
The main switch is not turned on Turn the switch on
The lift does not work
There is no power Check Power on to restore if
necessary
The electrical wires are
disconnected
Reconnect
Fuses are blown Replace
The maximum height limit
switch is faulty.
Check the switch and relevant
connection for proper operation.
Replace, if needed.
The lift 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
Presences of air in the hydraulic
circuit
Bleed the hydraulic system
The UP button is faulty. Check UP button and connection for
proper operation. Replace, if needed
The maximum pressure valve is
faulty
Check and clean if dirty or replace if
needed
The lowering solenoid valve
does not open.
Check and clean if dirty or replace if
faulty
The emergency screw of
lowering solenoid valve does not
close
Retighten the screw
The pump filter is dirty. Check and clean if needed.
The pump suction is blown Check the seal and replace if needed
The platforms are not
leveled
Oil leakages in hydraulic circuit Check the circuit for any leakage
The lift 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).
The DOWN button is faulty Check and replace if needed
The pressure of compressed air
is not sufficient
Adjust air pressure
The lift does not lift or
lower smoothly
Leakages or presences of air into
hydraulic circuit
Bleed the hydraulic system
The pump filter is dirty. Check and clean if needed.
The pump suction is blown Check the seal and replace if needed
The motor does not
stop when reaching it
maximum height
The maximum height limit
switch does not work
Check the limit switch and replace if
needed
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