53
Document NO.: RD-690-39-001 Version: A Date
：
2017.12.30
Battery Fault
Indicates the unavailability of the battery power,
or a voltage level less the DC 20V. The battery
may be depleted because the mains supply has
been unavailable for an extended period of
time, or there is a fault in the battery charger
that prevents the batteries from being charged.
Check that the battery connections are secure.
Measure the battery voltage. If the battery
voltage is less than the manufacturer's minimum
voltage, replace the batteries.
Measure the battery charging voltage to ensure
the battery charger is operating correctly.
System Fault
Indicates a fault with the internal supply
voltages used to supply power to the
microprocessor, or to the running of the control
program.
Contact the service company to replace the
main controller.
Earth Fault
Indicates a current leakage from any of the fire
detection and alarm system wires to Earth. This
may occur if there is damage to a single
conductor, and it contacts some conductive
equipment connected to Earth.
Isolate each of the transmission paths in turn
until the wires causing the Earth have been
identified. Trace the faulty wires to locate the
source of the connection to Earth, and prevent
the connection path.
7 SERVICE
7.1
Installation/Replacement
7.1.1
Installation/Replacement of PCB:
Remove the screws of PCB, which has to be change and remove the PCB from the mounting position and place the new
PCB in that same position as shown below.
Figure
–28
7.1.2 Installation/Replacement of Power adapter:
Summary of Contents for GS690
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