What must be confirmed regarding the fault lamps before closing the access door?

Before closing the access door, it is crucial to ensure that the fault lamps are off. This indicates that there are no active faults or malfunctions within the system. If the fault lamps were illuminated or blinking, it would signal that there is an issue that needs attention before the door is secured. Ensuring that the lamps are off confirms that the equipment is operating within the expected parameters and is safe to operate, thereby preventing any potential operational hazards that might arise from unresolved faults.