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Water Leak Detector - Four Zone with open/short-circuit detection
Page 3 of 3
Sensitivity
Within 30 seconds of applying power to the AX-WLDF, with the cable connected, adjust the sensitivity potentiometers
on each input by turning clockwise (increasing sensitivity) until the zone LED illuminates red, and then anti-clockwise
(reducing sensitivity) until the zone LED goes off. Less sensitivity may be needed when long runs of cable are used. If
the input is not used it should be disabled, see Disable zone.
Testing
To test the installation, after the sensitivity has been set, put a wet cloth over the cable to simulate a water leak, the
indicator zone LED will illuminate solid red. Remove the cloth, short across the mute input, and if the cable is dry the
zone LED will be solid green.
Audible alarm output
If the unit is in alarm and there is no mute switch in use, the alarm can be silenced by shorting across the mute terminals.
If the audible alarm is not required the mute terminals can be permanently shorted.
Alarm relay outputs and alarm LED
Only when the fault is removed and the mute contacts closed will the alarm relay contacts return to normal, and the
Alarm LED extinguish.
Cable fault
The unit monitors the cable for open and short circuit conditions. Only 1 cable or sensor should be connected to each
zone input. Connecting two cables or sensor to one zone input will interfere with the cable fault detection and unit
sensitivity. When a fault is detected the the Zone relay and General relay will go into the alarm state, the 0-10V will
show an alarm for the zone and the zone LED will flash red.
Analogue 0-10V output:
The table below indicates the output voltage for each fault condition (Alarm = water detected, open circuit or short
circuit) (OK = No alarm or input disabled):
Channel 1
Channel 2
Channel 3
Channel 4
Analogue Output
OK
OK
OK
OK
10.00V
ALARM
OK
OK
OK
9.33V
OK
ALARM
OK
OK
8.67V
ALARM
ALARM
OK
OK
8.00V
OK
OK
ALARM
OK
7.33V
ALARM
OK
ALARM
OK
6.67V
OK
ALARM
ALARM
OK
6.00V
ALARM
ALARM
ALARM
OK
5.33V
OK
OK
OK
ALARM
4.67V
ALARM
OK
OK
ALARM
4.00V
OK
ALARM
OK
ALARM
3.33V
ALARM
ALARM
OK
ALARM
2.67V
OK
OK
ALARM
ALARM
2.00V
ALARM
OK
ALARM
ALARM
1.33V
OK
ALARM
ALARM
ALARM
0.67V
ALARM
ALARM
ALARM
ALARM
0V