Display/
Problem
Error Messages
Display
Meaning
Measured temperature
is too high.
Measured temperature
is too low.
Ambient temperature
too high.
Ambient temperature
too low.
Error function display.
Blank display.
Low battery
indication.
10
Cause/Action
Displays ''H'' when measured
temperature is higher than
42.2°C or 108.°F.
Displays ''L'' when measured
temperature is lower than
32.0°C or 89.6°F.
Displays ''H'' in conjunction
with the ''▲'' when ambient
temperature is higher than
40.0 °C or 104.0 °F.
Displays ''L'' in conjunction
with the ''▼'' when ambient
temperature is lower than
10.0 °C or 50.0 °F.
When system malfunctions.
Please check if the battery
has been installed correctly.
Also check polarity (<+>
and <->) of battery.
If the steady battery
symbol is the only
symbol shown on the
display, the battery should
be replaced immediately.