Installation/Troubleshooting
26
Troubleshooting
2.5 About Pyroelectric Infrared Sensor
Problem Cause and Remedy
Pyroelectric
infrared sensor
does not work.
• You have not enabled the pyroelectric infrared sensor.
Enable the pyroelectric infrared sensor image buffer/transfer
(see page 60 of the Operating Instructions in the Setup CD-
ROM).
• Pyroelectric infrared sensor stops during privacy mode.
Pyroelectric infrared sensor stops during privacy mode.
Disable the privacy mode (see page 73 of the Operating
Instructions in the Setup CD-ROM).
• The pyroelectric infrared sensor is obstructed.
Even if the obstacle is made of glass or acrylic plastic, it
affects the pyroelectric infrared sensor performance.
Remove the obstacle in front of the sensor.
• The pyroelectric infrared sensor does not detect a temperature
difference outside its range.
The pyroelectric infrared sensor detects a temperature
difference between an object and its surroundings in about 5
m (16.4 feet) detection range (about 30 ° horizontally and
about 85 ° vertically ). Therefore, the smaller the temperature
difference is, the shorter the detection range gets. If there is
no temperature difference, the pyroelectric infrared sensor
may not detect anything. On the other hand, if there is a large
temperature difference, the detection range gets longer.
• The pyroelectric infrared sensor is dirty.
Clean the pyroelectric infrared sensor with a soft cloth.
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