How do I get out of Simplex service mode?
William Jenkins
Updated on January 22, 2026
Service mode is accessed by pressing and holding the Reset Button for approximately 10 seconds. Exit service mode by pressing and holding the reset button again for approximately 10 seconds or until the Heartbeat LED turns off.
How do you do the Simplex 4100 in walk test?
How Do I Put a Simplex Fire Alarm Panel Into a Walk Test?
- Press the Menu key on the Simplex fire alarm keypad.
- Select “Enable Walk Test” and press the Enter key.
- Press the F1 button to enable or disable the selected group for the walk test.
- Press the F2 key to enable or disable the event log during the walk test.
How do you reset a Tyco fire alarm?
To reset the alarms:
- Ensure the alarm devices are silenced.
- Press the green RESET button. The system attempts to reset all devices currently in alarm. This can take roughly 20 seconds. The progress of the reset action is displayed until it is complete.
How do you silence a simplex fire alarm?
Press Alarm Silence. Press System Reset. Press Ack to silence tone device. * Additional listings may be applicable; contact your local Simplex product supplier for the latest status.
What is NAC fault in fire alarm system?
An Open NAC is a trouble on a fire alarm panel that shows that a wire in the building, somewhere along the Notification Appliance Circuit, or horn / strobe circuit, has has broken wire or it has come loose from a screw terminal or splice.
How do I reset my Mircom pull station?
Resetting is accomplished by inserting a 1/8” screwdriver from the front. The handle, once pulled will remain open and cannot be reset without utilizing the screwdriver. The MS-400U Series manual stations are constructed of durable aluminium and finished in red.
What does the simplex 4100U fire alarm control panel do?
Overview The Simplex 4100U fire alarm control panel (FACP) has three general functions: • It monitors fire alarm initiating points (smoke detectors, heat detectors, and pull stations). • It activates fire alarm notification appliances (horns, strobes, and audio evacuation messages) when an initiating point activates.
What to do when you find fault in simplex 4100U?
When fault finding the Simplex® 4100U Fire Detection Panel some faults will ‘latch’ and not clear with the use of the ‘System Reset’ button (described on previous page). To clear latched faults or some networking issues it may be warranted to use a CPU Reboot otherwise known as a Warm-Start. To perform a Warm-Start, gain access to the CPU card.
Where is the button on the bottom of a simplex card?
Once located, find the small push-button switch located on the bottom edge of the card (4100U CPU card shown below). Push this button and the panel will then reinitialize. Allow 2-5mins for the panel to become fully active and re-establish communications with all its associated devices.
When did the simplex 4100 series come out?
The 4100 Series was released onto the Australian Market in 1990.The first version supported 512 devices or points. It was replaced with the 4100+ in 1993, which supported 1000 points & the networking of up to 99 panels. The 4100A was a localized version of the 4100+ & has the FireFighter Interface as per AS4428.1.
