An alarm signal generator circuit comprising: a determination unit (10, 30) that has as an input an alarm signal (OCx, OCy, OCz, OHx, OHy, OHz) from an instrument wherein a plurality of phase operations are carried out and is configured to output a first alarm signal (OCx', OCy', OCz', OHx', OHy', OHz') having a first pulse of a width corresponding to a type of failure for a phase in which a failure has occurred; an alarm signal generation unit (20, 40) that has as an input the first alarm signal (OCx', OCy', OCz', OHx', OHy', OHz') outputted by the determination unit (10, 30) and, in accordance with the result of the determination by the determination unit (10, 30), is configured to output a second alarm signal; and a single terminal for deriving the second alarm signal generated by the alarm signal generation unit (20, 40); wherein the determination unit (10, 30) further includes: a latch circuit (11-1, 11-2, 11-3, 11-4, 11-5, 11-6) that has the alarm signal (OCx, OCy, OCz, OHx, OHy, OHz) as an input; and a first monostable multivibrator (12-1, 12-2, 12-3, 12-4, 12-5, 12-6) that has a signal from the latch circuit (11-1, 11-2, 11-3, 11-4, 11-5, 11-6) as an input and is configured to output the first pulse of the width corresponding to the type of failure based on a transition timing of the output of the latch circuit (11-1, 11-2, 11-3, 11-4, 11-5, 11-6); and the alarm signal generation unit further includes a counter (21-4, 21-5, 21-6) that is configured to output one or more second pulses whose number corresponds to the phase among the plurality of phases in which the failure has occurred; wherein: the alarm signal generation unit (20, 40) is further configured to generate the second alarm signal by combining the first alarm signal (OCx', OCy', OCz', OHx', OHy', OHz') with the one or more second pulses outputted by the counter (21-4, 21-5, 21-6); and the second alarm signal has a waveform that comprises the first pulse having the width corresponding to the type of failure and the one or more second pulses whose number corresponds to the phase in which the failure has occurred so that the type of failure and the phase in which the failure has occurred can be determined from the second alarm signal. a determination unit (10, 30) that has as an input an alarm signal (OCx, OCy, OCz, OHx, OHy, OHz) from an instrument wherein a plurality of phase operations are carried out and is configured to output a first alarm signal (OCx', OCy', OCz', OHx', OHy', OHz') having a first pulse of a width corresponding to a type of failure for a phase in which a failure has occurred; an alarm signal generation unit (20, 40) that has as an input the first alarm signal (OCx', OCy', OCz', OHx', OHy', OHz') outputted by the determination unit (10, 30) and, in accordance with the result of the determination by the determination unit (10, 30), is configured to output a second alarm signal; and a single terminal for deriving the second alarm signal generated by the alarm signal generation unit (20, 40); wherein the determination unit (10, 30) further includes: a latch circuit (11-1, 11-2, 11-3, 11-4, 11-5, 11-6) that has the alarm signal (OCx, OCy, OCz, OHx, OHy, OHz) as an input; and a first monostable multivibrator (12-1, 12-2, 12-3, 12-4, 12-5, 12-6) that has a signal from the latch circuit (11-1, 11-2, 11-3, 11-4, 11-5, 11-6) as an input and is configured to output the first pulse of the width corresponding to the type of failure based on a transition timing of the output of the latch circuit (11-1, 11-2, 11-3, 11-4, 11-5, 11-6); and a latch circuit (11-1, 11-2, 11-3, 11-4, 11-5, 11-6) that has the alarm signal (OCx, OCy, OCz, OHx, OHy, OHz) as an input; and a first monostable multivibrator (12-1, 12-2, 12-3, 12-4, 12-5, 12-6) that has a signal from the latch circuit (11-1, 11-2, 11-3, 11-4, 11-5, 11-6) as an input and is configured to output the first pulse of the width corresponding to the type of failure based on a transition timing of the output of the latch circuit (11-1, 11-2, 11-3, 11-4, 11-5, 11-6); and the alarm signal generation unit further includes a counter (21-4, 21-5, 21-6) that is configured to output one or more second pulses whose number corresponds to the phase among the plurality of phases in which the failure has occurred; wherein: the alarm signal generation unit (20, 40) is further configured to generate the second alarm signal by combining the first alarm signal (OCx', OCy', OCz', OHx', OHy', OHz') with the one or more second pulses outputted by the counter (21-4, 21-5, 21-6); and the second alarm signal has a waveform that comprises the first pulse having the width corresponding to the type of failure and the one or more second pulses whose number corresponds to the phase in which the failure has occurred so that the type of failure and the phase in which the failure has occurred can be determined from the second alarm signal. the alarm signal generation unit (20, 40) is further configured to generate the second alarm signal by combining the first alarm signal (OCx', OCy', OCz', OHx', OHy', OHz') with the one or more second pulses outputted by the counter (21-4, 21-5, 21-6); and the second alarm signal has a waveform that comprises the first pulse having the width corresponding to the type of failure and the one or more second pulses whose number corresponds to the phase in which the failure has occurred so that the type of failure and the phase in which the failure has occurred can be determined from the second alarm signal.