The captain knew there was an engine fault but didn't want to alarm the passengers.

船长知道一台发动机出了故障，不过他不想惊动乘客。

《牛津词典》

Fault Analysis and Treatment: the alarm sound from the speaker to determine fault should be in memory.

故障分析与处理：由扬声器的报警声判断，故障应该出在内存上。

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Control the system locally or remotely based on ICloud network technology. Alarm, fault, status push function.

系统是基于云服务联网技术实现本地或远程设置或控制系统，报警、故障、状态推送功能；

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Steve Fussy, from the AWE, said the false alarm, which was triggered by a "sensor fault", was not meant to alert residents.

BBC: Atomic weapons base false alarm wakes neighbours

The second was in failing to warn the new owners, the Michaels, that the fire alarm system had been subjected to filtering while a previous fault was fixed.

BBC: Weston-super-Mare Grand Pier fire: Alarm firm negligent