INSTALLATION INSTRUCTIONS
Hydrosense Conventional Water Detection System
Document Part No. 3500012 REV03
Page | 17 of 27
Internal Indicators
Mains fail
Indicates that the 230V AC supply is not present and the system is running on standby
batteries. If there is not a power cut, check the panels mains fuse.
Batt Fail
Indicates that the standby battery has become disconnected or that the charging circuit of
the control panel has failed. Check that both batteries are connected and linked together.
Test battery. Disconnect battery and ensure that 28 Volts can be measured on battery
charger leads.
CPU Fault
Indicates that the central processor unit has failed to correctly execute code and has been
re-started by the system watchdog. The
Watchdog Reset
switch must be pressed to clear
the CPU fault condition.
Press
Watchdog Reset
. If system does not return to normal then the panel is probably
damaged and needs the circuit board replacing.
Aux 24V Fault
The Aux 24V and R0V terminals provide a 500 milliamp, 24V DC power supply for power fire
alarm ancillary equipment. This LED indicates that fuse protecting the R0V output has
operated and the rating of this output has been exceeded. The fuse is a self-resetting type
and the supply will resume when the fault condition is removed.
Batt Low
Illuminates when the system is running on batteries and the battery voltage is between 21.5
V and 20.5 V (the minimum battery voltage).
Comms Fault
Indicates that communication has been lost with a repeater panel or Ancillary board. Check
for comms fault at all repeaters and ancillary boards to identify the source of the problem.
Earth Fault
Indicates that part of the system wiring is connected to earth. Remove all system wiring and
re-connect cables one at a time until the earth fault returns. This will indicate which cable the
earth fault is present on.
Sys Fuse Fault
Indicates that the total power rating of the power supply has been exceeded and that the
system fuse has come into operation. Remove and review all loads and re-connect one at a
time until over rated circuit trips fuse to identify troublesome circuit.
S1 and S2 fault
Indicates a short or open circuit on sounder outputs. Remove wiring and refit end of line
resistors. Check sounder circuit wiring.
