<p>Disclosed is a clock signal error detection system, which prevents system faults that result from clock signal errors by using serial communications to detect same. A receiver (2) of the clock signal error detection system periodically reads signals received via serial (asynchronous) communications that are transmitted from a transmitter (1), and a clock signal error detection device (23) determines that a clock signal error has occurred, and outputs an alert, if the bit value that is read immediately after the delimiter of each respective bit differs from the bit value that is read immediately prior to the delimiter following thereafter.</p>
