Control System 22Service Manual – SC500
Function Board (EB1) Alarm Codes (Continues)
General alarms
Alarm on Function Board - FLASHING YELLOW + RED LEDS
Alarm code
--------------------------
Description
No.
Flashes
Meaning Condition Effect
Service Suggestions
G3
-----------------------
MAIN FUSE
FAILURE
3 Blown F2 fuse. Blown F2 fuse. Function block.
F2 is a safety fuse primarily included to
prevent a short circuit or serious damage
to the board causing currents such as to
melt cables and/or cause smoke or re. If
F2 has blown, this is usually indicative of
serious damage to the board.
1. Removing the cover should allow
you to understand the extent of the
damage, but the solution in any case
should be to replace the board.
2. Try replacing fuse F2 only if there is no
clear damage to the board and wiring.
3. Ensure you tighten the fuse contacts
correctly.
G4
-----------------------
BATTERY LOW
VOLTAGE
4 Undervoltage. The battery voltage
remains below 18.4V
for over 10 seconds (for
WET CELL batteries,
19.6V for GEL-AGM
batteries).
Function block.
1. Check the battery voltage under
no-load conditions and under load.
Replace the faulty battery/batteries if
necessary.
2. Recharge the batteries by performing a
complete charging cycle.
G5
-----------------------
BATTERY
OVERVOLTAGE
5 Excessive
battery voltage.
Battery voltage over 32V. Function block.
Check the voltage of the installed batteries
and that the terminals are correctly
tightened.
G6
-----------------------
HARDWARE
FAILURE
6 Serial
communication
error with
dashboard
instrument board.
No signal or error
in communications
decoding between the
Function Board (EB1)
and the Display Board
(EB2).
No block.
1. Check the 5 cables from the 6-way
dashboard instrument board connector
to connector J3 pins 1, 2, 3, 4.
2. If there is continuity, the dashboard
instrument board must be replaced.
G7
-----------------------
HARDWARE
FAILURE
7 General relay
fault.
Relay closes or closed at
start-up.
Function block.
Replace the board.
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