Page 4 of 5
WD-AMX
Date of Issue: 17/08/2012
Issue Number: 5.4
LED Status:
Green LED:
The green LED should be on continuously during normal operation, except in the “off” mode or there is an error (see “Error
Indication”).
Yellow LED:
This will be on if the sensor reading is more than 33% of the threshold setting.
Orange LED:
This will be on if the sensor reading is more than 66% of the threshold setting.
Red LED:
This will be on solidly if the sensor reading exceeds the threshold setting. If the red LED is flashing, it is either because the
unit is in “test” mode or,
if the green LED is off
, because the unit has discovered an error (see “Error Indication”).
If the unit thinks that there is an error (for example, the sensor reads such an extreme level that a short circuit is suspected)
then the red LED will flash continuously, the relay will be de-energised, and the sounder will be activated (if enabled). The
sounder pattern will be three tones followed by a gap, to differentiate it from the flood warning. The green LED will be off to
differentiate between an error report and the “Test” mode. The error report will be held until the reset button is pressed,
although this function could reset automatically if the unit is in “Reset” mode.
Off:
The relay will be de-energised and the sounder silent, no matter what the sensor condition. The green and yellow LEDs will
flash alternately while in “learning” mode, and then just the green LED will flash continuously to show that this mode is
selected. The other three LED’s will indicate as normal.
Reset:
The WD-AMX will report all flood alerts by releasing the relay and activating the sounder (if enabled). Any transition will be
reported for a minimum of two seconds. When the sensor stops indicating a flood, the unit resets automatically.
Latch:
In latching (manual reset) mode the WD-AMX reports the initial flood alert by releasing the relay and activating the sounder
(if enabled). The relay and sounder will continue to indicate the alarm until the reset switch on the unit has been pressed.
NB
The LED’s will indicate the
true
status of the sensor.
On:
This is a mode used to test the installation without needing to wet the sensor. The sounder and relay will be energised and
the green and red LEDs will flash alternately for approximately 2 minutes to show that this mode is selected. After this time,
the green LED will be ON while the red LED will continue to flash.
With the sensor connected and the unit power up, enter learning mode and then slowly adjust the threshold trimmer. As
the input becomes more sensitive, the yellow, orange and finally red LED’s will progressively light. If the red LED is lit, the
sensitivity is set too high, and the unit is in alarm.
Error Indication:
Relay Output Modes:
Adjusting the Alarm Threshold:
