Volvo VNL Operator's Manual page 166

Stop message
Red STOP telltale
If the temperature of the transmission oil
becomes too high, a flashing stop message
is shown automatically with the text TOO
HIGH. At the same time the red
telltale under the display lights up and the
warning signal sounds. Esc acknowledges
the stop message.
For TOO HIGH to display with the
STOP telltale, the transmission oil tem-
perature must be 285 F (140 C) for 30
seconds.
Graphic Display
STOP T3008831
TOO HIGH
285 F
T3008861
161