for leaks and component failures. Power cycle the unit to reset the alarm but avoid doing this
without finding the cause, as it will shorten the generator’s life. Contact South-Tek Systems,
or the local installer, for further troubleshooting.
7.5.3. Low System Pressure Alarm Mode
The Low System Pressure alarm activates when a system pressure is detected below the
normal functioning limits of the nitrogen generator. This may be from an issue with the
generator, a supply valve being shut off, or caused by a large leak in the fire protection
system, The Low Pressure Alarm will trigger the audible buzzer, alarm contact, and flash “N2
PRESS ALAR.” on the controller’s 7-segment display.
7.5.4. Power Loss Alarm Mode (-----)
The Power Loss Alarm activates when the nitrogen generator loses power for any reason.
This will cause the alarm contact to trigger.
7.5.5. Filter Replacement Alarm Mode
Once the nitrogen generator has been running for 1,000 hours or more, the filter replacement
alarm will activate the audible buzzer, alarm contact, and flash “FILTER CHANGE” on the
controller’s 7-segment display. Replace the filters according to Section 9 Maintenance. After
replacing the filter elements, press and hold the Filter Change Reset button (Down Button)
for 7 seconds. Screen will show “FILTER RESET” and audible beep will confirm that the time is
reset, and the filter alarm will shut off if it is active. (Note: resetting this will also trigger the
Customer Alarm Relay for one second).
7.5.6. Communication
(1) (Modbus RTU)
Modbus (RTU) is optional feature our generator offers to our customer to monitor the unit
from BMS (Building Management System).
MODBUS communication can be set up to retrieve real time data. The nitrogen generator
MODBUS Communication settings are as follows:
- Protocol: RTU
- Slave ID: 1
- PLC Controller: Slave
- Bud rate: 119200
- Data Bits: 8
- Parity: none
- Stop Bits: 2
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