How do you ensure a failed safety device is not re-enabled before repair?

How do you ensure a failed safety device is not re-enabled before repair?

• A. Ignore the fault and continue
• B. Rely on operator to refrain
• C. Lockout/tagout, disable device, test to confirm fault, and re-enable only after successful repair and verification
• D. Replace the device without testing

Answer: (C)

The idea is to prevent any chance of the failed safety device being reactivated before it’s fixed. This is done by using a lockout/tagout process to isolate the device from all energy sources, physically disable the device so it cannot operate, and then test to confirm the fault is real. Only after the repair is completed and the safety function has been verified should the device be re-enabled. This sequence protects workers and the system by ensuring the safeguard cannot be used in a compromised state. Ignoring the fault is dangerous because the device could fail again or fail differently. Relying on an operator to refrain from re-enabling it is not a formal, enforceable control. Replacing the device without testing could leave a latent issue or fail to restore proper safe operation.

The idea is to prevent any chance of the failed safety device being reactivated before it’s fixed. This is done by using a lockout/tagout process to isolate the device from all energy sources, physically disable the device so it cannot operate, and then test to confirm the fault is real. Only after the repair is completed and the safety function has been verified should the device be re-enabled. This sequence protects workers and the system by ensuring the safeguard cannot be used in a compromised state.

Ignoring the fault is dangerous because the device could fail again or fail differently. Relying on an operator to refrain from re-enabling it is not a formal, enforceable control. Replacing the device without testing could leave a latent issue or fail to restore proper safe operation.