Control System 24Service Manual – SC3000
General alarms
Alarm on the function electronic board - YELLOW LED + RED LED FLASHING
Alarm
Code
on the
display
No. of
ashes
on the
board
Meaning Condition Effect
Troubleshooting action
G4 4 Blown F2 fuse. Blown F2 fuse. Function block.
F2 fuse is a power safety fuse (100 amps rated)
and its primary function is to avoid that a short drive
so much current to generate smoke or re into the
board. The F2 opening is normally due to a severe
damage of the board.
1. Open the board plastic cover to verify the
condition of the board.
2. If everythink seems ok try to substitute F2 fuse
otherwise substitute the board.
3. Take care to properly tight the fuse .
G5 5 Wrong KEY
sequence.
Voltage dip (of the order
of 100ms or less) of the
key input.
Function block.
1. Check any bad contact in the key switch.
2. Check for any bad contact in the wires from the
key switch to the pin 5 and 6 of J3 connector on
the board.
3. If necessary substitute the key switch.
G6 6 No signal from
BATTERY
CHARGER
No signal from battery
charger on the
communication yellow
wire to pin 11 of J1
connector
The charging
battery phase is
not shown
1. Check the continuity of the yellow wire from the 3
way charger connector to pin 11 of J1 connector.
2. If ok, it is necessary to substitute the charger or
the board.
G7 7 Undervoltage. The battery voltage
stay for more than 10
senconds lower than
18,4 Volt (for WET
batteries, 19,6 Volt for
GEL-AGM batteries).
Function block.
1. Check the battery voltage without and with load. If
necessary substitute the bad batteries.
2. Charge the batteries with a complete charging
cycle.
G8 8 Serial
communication
error with
dashboard
electronic board.
No signal or
decoding error in the
communication between
the function Electronic
board (EB1) and the
display board (EB2).
No block.
1. Check the 4 wires from the 4 ways connector on
the dashboard to the pin 1,2,3,4 of J3.
2. If ok substitute the dashboard.
G9 9 Battery voltage
drop.
Battery voltage drop
bigger than 3 Volt in less
than 1 sencond.
Drive system +
electromagnetic
brake block.
G9 tipically shows that the red safety button under
the seat (that mechanically open the ANDERSON
CONNECTOR) was pressed during the machine
operation.
If this is not the case, check the power wirings from
the batteries to the ANDERSON connector: it could
be a bad contact in one of these power connections.
Otherwise it could be caused by one or more batteri-
es damaged or to be replaced.
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