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TROUBLESHOOTING
Safety Warning
Only qualified personnel can perform inspection, testing and maintenance of the nitrogen generation
equipment. Prior to any system troubleshooting on the nitrogen generation system, ensure that the
nitrogen generator is isolated from the compressed air supply and all system risers. Be aware of
pressurized system components as some of the troubleshooting procedures require system components
to be pressurized. Failure to do so can result in system damage and/or personal injury.
Nitrogen generator not
running.
No lights or indicators on generator.
Check incoming power and fuses in nitrogen generator.
Nitrogen generator not
running.
Generator lights and indicators on.
The nitrogen generator may be in the depressurizing phase of the
breathing cycle. When sprinkler system reaches the generator
cut-in pressure, the nitrogen generator will automatically turn on.
(normal operation).
Check status of solenoids in generator.
• Solenoids should be energized (LED on) when running
Check system pressure:
• If system pressure above cut-in pressure of generator, reduce
system pressure below cut-in pressure and check generator
operation.
• If system pressure below cut-in pressure of generator, check
power to air compressor.
Nitrogen not flowing in
sprinkler system.
Verify nitrogen generator is not in bypass
mode.
Place nitrogen generator in nitrogen generation mode.
While the nitrogen generator running, use a gas
analyzer to measure the nitrogen output
quality. (See Commissioning and Maintenance
Sections).
If the nitrogen reading is below 97%, contact ECS.
While the nitrogen generator running, measure
generator production flow rate through flow
meter. (See Commissioning and Maintenance
Sections).
Compare generator production rate to system commissioning
documentation and/or factory test report. If significantly lower,
contact ECS.
Nitrogen generator is
short cycling.
Pressure on generator HMI display decreases
after generator shuts off with sprinkler system
air maintenance device (AMD) open.
Close inlet to sprinkler system AMD, if pressure continues to
decrease, check for leaks in generator cabinet and supply line.
With AMD closed, the pressure on generator
HMI display remains constant after generator
shuts off.
• AMD partially opening allowing minimal nitrogen flow to sprinkler
system results in generator short cycling. Adjust, repair or replace
AMD as necessary.
• Verify the AMD pressure is 3-5 psig (.2-.3 bar) above nitrogen
generator cut-in pressure. Adjust as necessary.
Air compressor is short
cycling.
Air compressor short cycles with the nitrogen
generator in the standby mode.
• Check supply line from air compressor to nitrogen generator for
leaks.
• Check filter floats in filter housings not sealing properly.
Nitrogen generator remains on while air
compressor short cycles.
• Verify the excess air regulator pressure is set 5-10 psig (.3-.7) below
air compressor cutout pressure. Adjust as necessary. Air
compressor should continue to operate until nitrogen generator
shuts off. (See Commissioning and Maintenance Sections).
• Verify production flow rate and nitrogen purity levels.
Nitrogen generator
running continuously or
running more than four
(4) hours
Generator in nitrogen generation mode with
AMD open and unable to pressurize sprinkler
system.
Close AMD.
• If system supply line pressurizes, check sprinkler system for
leaks or inoperable AMD (AMD not automatically closing).
• If system supply line does not pressurize, check nitrogen
generator and system supply line for leaks.
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