Use and maintenance manual Self-propelled aerial platforms Page 50
7.2.8
Operation check and adjustment of platform overload controller
Fig.25
The AIRO self-propelled aerial platforms, SF series, are equipped with a
sophisticated system controlling the platform overload.
Normally the overload controller does not require any adjustment, since it is
calibrated in the factory before the machine is delivered.
This device checks the load on the platform and:
-
inhibits all movements if platform is overloaded by 25% compared to the
rate load (drive and steering inhibited with platform lifted);
-
warns the user of the overload condition by means of the audible
warning device and the platform warning light.
By removing the exceeding load, the machine can be operated again.
The overload controller consists of:
-
deformation transducer (
A
) (load cells);
-
electronic board (
B
) for the device calibration located inside the box
installed under the platform;
The calibration of the system is necessary:
-
in case of replacement of one of the items composing the system;
-
when, following an excessive overload, even after removing the
excessive load, the danger condition is signalled anyway.
To calibrate the device:
-
turn-off the machine;
-
open the box which contains electronic board
C;
-
with no load on the platform, introduce the jumper to connector
G
;
-
turn-on the machine;
-
press button
D
(the yellow and red light turn on);
-
press button
E
(the luminosity of the red light increases a few seconds),
and the load system will be reset;
-
on the furthermost part of the platform overhang place a load equal to
the rated load plus 25%;
-
press button
F
(the green light turns on a few seconds);
-
press button
D
again to exit the calibration procedure (the yellow light
turns off and if the procedure has been carried out correctly, the red light
stays on signalling the overload);
-
turn-off the machine;
-
open the jumper on connector
G
;
-
turn-on the machine;
-
check that after removing the 25% overload (only the rated load stays on
the platform) the alarm condition does not occur in any of the platform
positions (platform down, up, driving, rotated);
-
once the adjustment has been completed, close the box which contains
the board.
AS THIS OPERATION IS VERY IMPORTANT IT IS TO BE CARRIED OUT
BY SPECIALIZED TECHNICIANS ONLY.
CALL THE TECHNICAL SUPPORT
B
D
E
F
G
C
A
A
A
A
