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should occur, the detector will chirp twice (
BEEP - BEEP
) per minute,
SERVICE
red LED
will blink for 5 seconds every minute, and model CD8180 LCD will continuously display
. This malfunction condition indicates a problem with the unit. See Section 13 for
information regarding service.
SENSOR END-OF-LIFE CONDITION:
The electrochemical sensor has a minimum
five year life expectancy. Once the batteries are activated, a microcontroller monitors
the total time that the detector is under power. After five years of service, the “End-of-
Life” signal will be activated; the detector will chirp once per minute, and the
SERVICE
red LED will glow for 3 seconds at the same time. The model CD8180 LCD will also
continuously display
to indicate that the sensor life has expired and the detector
must be replaced. See Section 13 for handling an End-of-Life alarm.
ALARM CONDITION:
When the batteries are active, and CO gas is detected at a level
and duration specified in Section 3
CO RESPONSE TIMES
, the horn will sound and the
ALARM
red LED will light. The initial 5 minutes of an alarm signal will repeat 4 short
beeps and pause for 5 seconds. Afterwards, the alarm signal will change to 4 short
beeps and pause for 60 seconds. The
ALARM
red LED will flash in sync with the
beeping sound. The model CD8180 LCD will also display the current CO level detected.
The alarm signal is either manually or automatically reset. See Section 10
WHAT TO
DO WHEN THE ALARM SOUNDS
.
TEST/RESET/MUTE
BUTTON:
The
TEST/RESET/MUTE
button is used to check the
detector for proper operation, and to temporarily mute horn for 5 minutes when alarm is
activated, for 24 hrs. during the first week of a “Low Battery Voltage” signal (
)
activation, or for 60 hrs. during the first month of an “End-of-Life” signal (
) activation.
The model CD8180 LCD will display the current CO level detected when detector is
being tested, or
when an alarm signal is muted. See Section 9 for detailed
instructions to test the detector and mute the audible horn.
LCD DISPLAY FUNCTION (FOR MODEL CD8180):
When detector is operating
normally, the LCD will continuously display
. If a CO level of 30 ppm or more is
detected, or alarm is activated, the LCD will automatically display the current CO level
detected. The LCD will display the
symbol if the batteries have low voltage.
DISPLAY CO LEVEL BUTTON (FOR MODEL CD8180):
To manually display the
current and highest CO level detected, press the
DISPLAY
CO LEVEL
button once. The
LCD will display the recorded data in the following order:
1. The current CO level detected from 9-999 ppm,
2. The highest (peak) CO level detected within the last 30 days from 9-999 ppm, and
3. The total length of time the highest CO level has been detected, within 10% of the
peak, from 1-999 minutes.
Each reading will appear for five seconds. To erase the record in memory, press the
DISPLAY CO LEVEL
button, and, while the readings are being displayed, press the
TEST/RESET/MUTE
button. The detector will burst a long beep, and display read
.
