Casio DT-X200 Series Software Manual page 36

(4) Temperature restriction control
When external temperature is high and the unit's devices are operating at full capacity (high CPU
speed, continuous wireless communications) etc., the internal temperature of the unit rises and
eventually a warning is issued and the power is turned off to protect the unit. In that case, either
turn off the power and leave the terminal unused for a while, or move it to a location where the
surrounding air temperature is cooler.
If power is turned off due to the temperature restriction, a warning message is output when the
terminal is turned on again
Warning the next time the unit starts after being turned off due to temperature
restriction
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