21
Hydraulic oil level too low
Check and refill hydraulic oil.
Oil leakage
Check and repair the seal performance of
the oil hoses and/or cylinder.
Oil suction failure
Excessive quantity of oil.
Reduce oil quantity.
Loads cannot be
lowered
Dirty oil blocks the control valve.
Check the hydraulic oil and clean the
control valve. Replace hydraulic oil if
necessary.
The lowering electromagnetic
valve is not activated or it is
damaged.
Check or replace the lowering
electromagnetic valve .
Stacker cannot be
operated
Battery is charging
Charge the battery completely and then
remove the main power plug form the
electrical socket.
Battery not connected
Connect the battery correctly.
Fuse failure
Check and eventually replace fuses.
The battery is discharged.
Charge the battery.
The truck is not powered on.
Check emergency switch, key switch and
other switches.
The sequence of operations is
wrong.
Move the tiller bar to the braking position
and put the tiller bar back to the operating
position, then operate the accelerator
Stacker only travels
in one direction
The accelerator and the
connectors are damaged.
Check the accelerator and the connectors.
Stacker travels very
slowly
The battery is discharged.
Check the battery status by the discharge
indicator.
The electromagnetic brake is
engaged.
Check the electromagnetic brake.
The relating tiller cables are
disconnected or damaged
Check the tiller cables and connectors.
Stacker starts up
suddenly
The controller is damaged.
Replace the controller.
The accelerator cannot turn
back to its neutral position.
Repair or replace the accelerator.
If the truck has malfunctions and can’t be operated out of the working zone, jack the truck up and go with
a load handler under the truck and ensure the truck safety. Then move the truck out of the aisle.
