7.5.
LOCKING RELEASE
7.5.1. Press the TEST button, the unit will return to Normal Operation status, see fig.3.
7.6.
ALARM CONDITION
7.6.1.
When the unit detects dangerous levels of CO, it will emit an alarm signal along with flashing red LED, see fig.4. This will continue
as long as there is a dangerous level of CO concentration of or equal to 5PPM. The LCD will show the concentration and SPEAKER
symbol. This will indicate that an alarm has occurred and it should be investigated.
NOTE:
To stop the alarm refer to 7.4.
7.7.
MEMORY FUNCTION
7.7.1.
When no one is home, the unit may detect CO and the alarm sound. The alarm stops when the CO condition returns to normal. The
highest CO concentration that was present, will be recorded and shown on the LCD with the “CO figure” flickering once every 15
seconds, together with 2 continuous “beep”, “beep” sounds, red LED and the “SPEAKER” symbol flashing, see fig.6.
7.7.2.
Press the TEST button, the “CO figure” will then be cleared and the unit returns to normal working condition, see fig.3.
7.8.
LOW BATTERY SIGNAL
7.8.1.
When the unit detects the battery voltage is low and needs replacing, the red LED will beep every 40 seconds along with one BEEP.
The LCD will show the LOW VOLTAGE symbol, see fig.6.
7.8.2.
The
red LED will flash as usual, during the low battery period, and the unit can still alarm as usual.
NOTE:
The normal stand by time of battery is 5 years minimum. If there is a problem with the battery or low battery signal warning
keeps activating for over 30 days, replace the battery.
7.9.
MANUAL ZERO
7.9.1.
In normal operation with no CO gas present, when the LCD does not show “0 PPM”, you can press the TEST button down for 3
seconds until the PPM character on the LCD disappears, then release the TEST button until the LCD shows “0 PPM”.
7.9.2.
Manual Zero can only be carried out under the following two conditions:
A: The CO concentration on the LCD is lower than 10 PPM.
B: The first digit of the LCD shows “-”.
7.10.
FAULT SIGNAL WARNING
7.10.1. T
he unit will self-test the amplifying circuit and sensor every 10 seconds.
When there is a problem with the amplifying circuit or sensor,the unit
will beep every 30 seconds along with a yellow flashing LED, the LCD
will show “---”, see fig.7.
CO - LEVEL (PPM)
RESPONSE TIME (MIN.)
ALARM SOUND
30 ppm - 49 ppm
After 120
2 continuous chirp (with 1 s frequency chirp)
50 ppm - 99 ppm
60 - 90
3 continuous chirp (with 1 s frequency chirp)
100 ppm - 299 ppm
10 - 40
4 continuous chirp (with 1 s frequency chirp)
300 ppm or above
0 - 3
4 continuous chirp (with 0.5 s frequency chirp)
Flashes every 40
seconds
fig.6
fig.8
Flashes every 60
seconds
fig.7
Flashes every 30
seconds
S
CMA1 Issue 2 23/06/2020
Original Language Version
© Jack Sealey Limited