If an electric actuator must be removed from a clean agent cylinder for maintenance, what indication should appear on the control panel?

If an electric actuator must be removed from a clean agent cylinder for maintenance, what indication should appear on the control panel?

• A. Audible signal only
• B. Audible and visual trouble signal (system impairment)
• C. Visual signal only
• D. No signal

Answer: (B)

Removing an electric actuator from a clean agent cylinder means the system can’t reliably release the agent, so it is treated as a system impairment. The control panel should show both an audible and a visual trouble signal to ensure everyone nearby notices the issue, even in loud environments and over visual alarms. The audible alert draws attention quickly, while the visual signal confirms the fault and its location on the panel, guiding maintenance and operations to take appropriate steps—tagging out the unit and performing the work safely while avoiding any reliance on a nonfunctional release path. Relying on only audible or only visual signals could leave people unaware or uncertain of the system’s status, and no signal would leave the impairment unrecognized.

Removing an electric actuator from a clean agent cylinder means the system can’t reliably release the agent, so it is treated as a system impairment. The control panel should show both an audible and a visual trouble signal to ensure everyone nearby notices the issue, even in loud environments and over visual alarms. The audible alert draws attention quickly, while the visual signal confirms the fault and its location on the panel, guiding maintenance and operations to take appropriate steps—tagging out the unit and performing the work safely while avoiding any reliance on a nonfunctional release path. Relying on only audible or only visual signals could leave people unaware or uncertain of the system’s status, and no signal would leave the impairment unrecognized.