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v. 5
NEW STYLE BOARDS
1)
Remove control box cover (see service
procedure 14).
2)
Unplug J1 and J2 connectors (see Fig. 27).
3)
Using long nose pliers, remove the cirucit board
from the plastic standoffs holding it in place.
4)
Replace the new main PCB circuit in place as
shown on Fig. 27, pushing it onto the plastic
standoffs.
5)
Plug J1 and J2 connectors.
6)
Adjust the circuit board as per service
procedure 14.3
7)
Install the control box cover.
8)
Reinstall the battery pack and test all features
controlled by this device to confirm that it works
properly, as per service procedure 4.
For the main PCB replacement, the safe working load test should be performed with free weights because
the potentiometers of boom and leg actuators might have to be adjusted. For the leg actuator adjustment,
the legs have to be opened and closed with the safe working load hoisted. It is not possible to use the
load test equipment because of the test straps that restrain the legs and prevent them from moving freely.
OLD STYLE BOARDS
a)
Safe working load:
By actuating the hand control, make sure that the lift raises the safe
working load on its entire stroke (between 227-238 kg [500-525 lb]). If not, adjust the current
limiter with the potentiometer VR1 (see Fig. 28). Keep the safe working load raised for the next
step.
b)
Opening and closing the legs:
The safe working load hoisted, open and close the legs
completely with the hand control. If they do not function correctly, adjust the current limiter with
the potentiometer VR2.
c)
Safe working load X 1.5
:
Using the buttons of the control panel make sure that the hoist
does
not lift
1.5 X its safe working load (between 318-340 kg [700-750 pounds]). If it does, adjust
the current limiter with the potentiometer VR1.
d)
Casters:
All casters must touch the
ground at all times.
e)
Emergency stop:
When completing
a full stroke, press the emergency
stop button (red). The actuator must
stop immediately. Press the “on”
button (green) to reactivate the hoist
and finish its course.
Fig. 28
Fig. 27
J2
connector
J1
connector
Plastic
standoff
Note: If the potentiometer value was lowered, a safe working load test must be performed, as
service procedure 22.
