Cotech 36-6721, Original Instructions Manual, Page: 6 / 24

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Troubleshooting guide
The main unit doesn’t
display anything. • Check the batteries in the main unit and sensor.
Temperature from out-
door sensor not dis-
played. • Check that the distance between the main unit and
sensor does not exceed 30 m.
• Make sure that the devices are located at least 2 m
from monitors and TV sets.
• Avoid placing the devices on or close to window
frames made of metal.
• Avoid using electronic devices such as loudspeakers
which operate at the same frequency (433 MHz),
close to the devices.
• Check the batteries in the main unit and any
connected sensors.
• Remove the batteries, wait awhile and then reinsert them.
Displayed temperature
is incorrect. • Remove the batteries, wait awhile and then reinsert them.
• Make sure that the devices are not affected by heat
sources or air-conditioning units and such.
Specifications
Main unit
Temperature (indoor) 0 to 50 ºC (32 to 122 ºF)
Temperature (outdoor) −30 to 50 ºC (−22 to 122 ºF)
Accuracy ±0.5 ºC
Batteries 2 × AAA/LR03 (sold separately)
Size Ø 92 mm, height 20 mm
Weight 80 g
Sensor
Batteries 2 × AAA/LR03 (sold separately)
Update interval 60 seconds
Frequency
433 MHz
Range 30 m
Size
38 × 100 × 18 mm
Weight 30 g