Kidde HD135 - Manual (Page 9)

5. OPERATION AND TESTING
OPERATION: The heat alarm is operating once AC power is applied, fresh batter-
ies are installed and testing is complete. When the heat alarm senses tempera-
tures above 135ºF (plus or minus a few degrees), the horn will sound a loud (85
db) pulsating alarm until the temperature drops below 135ºF.
LED INDICATORS: This heat alarm is equipped with red and green LED indicators.
The red LED is located under the test button and has two modes of operation.
Standby Condition: The red LED will flash every 30-40 seconds to indicate that
the smoke alarm is operating properly.
Alarm Condition: When the unit detects heat and goes into alarm, the red
LED will flash rapidly (one flash per second). The rapid
flashing LED and pulsating alarm will continue until the
temperature drops below 135 ºF.
WHEN UNITS ARE INTERCONNECTED, only the red LED of the originating alarm
or alarm being tested will flash rapidly. All other units in the interconnect sys-
tem will sound an alarm but their red LED’s will NOT flash rapidly.
The green LED is located under the other button.
Standby Condition: The green LED will be steady on, indicating the presence
of AC power.
TESTING: Test by pushing the test button on the cover and hold it down for a
minimum of 5 seconds. This will sound the alarm if all the electronic circuitry,
horn, and battery are working. THE TEST SWITCH MAY NOT CAUSE A TEST SIG-
NAL IF THE AMBIENT TEMPERATURE IS BELOW 32ºF, IN THIS CASE TEST THE
UNIT BY BLOWING HOT AIR AT THE ALARM SENSING ELEMENT WITH A HAIR
DRYER HELD ABOUT 1 FOOT FROM THE UNIT.
If no alarm sounds, check the fuse or circuit breaker supplying power to the
alarm circuit, if the alarm still does not sound the unit may have defective bat-
teries or other failure.
TEST THE ALARM WEEKLY TO ENSURE PROPER OPERATION.
Erratic or low sound coming from your alarm may indicate a defective alarm,
and it should be returned for service (see section 12).
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