Edwards Signaling eFSA250 - Manual (Page 178)

Chapter 3: System operation
166 E-FSA64 and E-FSA250 Technical Reference Manual
Activating and restoring sensor bypass
Use the Activate Sensor Bypass option to stop the photoelectric element on the
PHS detector from generating supervisory messages on the LCD, while still
using the heat element of the same PHS. Sensor Bypass is applicable to PHS
devices with device type as “Heat + Smoke Supv Latching,” or “Heat + Smoke
Supv Nonlatching,” only.
Use the Restore Sensor Bypass option when both the heat and smoke
(photoelectric) elements of the PHS return to normal operation. Activation
messages for either condition appear on the LCD.
When Sensor Bypass is activated, the system displays an alarm message only
when the heat element activates. For example, when a large event is planned
that allows smoking or pyrotechnics in a ballroom that has a PHS detector
installed; you may choose to bypass the smoke element to prevent false alarms
while still using the heat element to detect a fire.
When a device is off-normal and you attempt to activate or or restore sensor
bypass, the system displays a warning message. When the activate sensor
bypass option is applied to a device, the system responds as follows:
• The common trouble LED turns on.
• The LCD displays an event to indicate that the device is bypassed.
• The common Trouble LED flashes and the panel goes into a trouble state.
• The common Trouble relay changes state.
• The active point indicators on the LCD increment.
• Resetting the panel has no effect on sensor bypass activated devices, but
removing all power from the panel clears the sensor bypass and restores the
device.