21
Manual: NGP-300D
11. Nitrogen Generator Alarms/Troubleshooting
The nitrogen generator has 7 alarms. If an alarm is activated, the alarm light will turn red on the outside of the cabinet and the
Alarm Horn will sound. The alarm number will also display on the Nitrogen Control Module inside the cabinet.
Alarm 1 – Nitrogen Solenoid Excess Cycles
Issue: The nitrogen solenoid has cycled more than 36 times in 12 hours.
NOTE:
More than 8 cycles a day will reduce membrane life below 10 years.
Answer:
1.
If the nitrogen solenoid is ON, check the pressure on the nitrogen storage tank. It should be below 80 PSI. If the pressure is
greater than 80 PSI, the pressure switch may need re-adjustment or replacement.
2.
Check the nitrogen generator system for leaks. See Page 23 for method.
3. Check the sprinkler system for leaks.
Alarm 2 – Bypass Alarm
Issue: The nitrogen generator has been left in Bypass Mode (Air Fill) for over 1 hour. This alarm clears when the unit has been
placed in Nitrogen Mode. It is designed to prevent the unit from being inadvertently left in Bypass Mode.
Answer:
1.
Turn the Bypass Valve (Yellow Handle) to the OFF position. Open the Nitrogen "Inlet" Valve (Blue Handle) and the Nitrogen
"Outlet" Valve (Blue Handle). Refer to
Nitrogen Purging Procedure
on page 17.
2.
If the unit is filling multiple systems, or being left intentionally in Bypass Mode, mute the Alarm Horn by pressing the button
on the inside of the cabinet on the back of the Alarm Horn.
Alarm 3 – Compressor Overload
Issue: The control panel has tripped due to a motor overload.
Answer:
1.
Turn power OFF to the nitrogen generator.
2.
Check overload setting.
3. Reset the thermal overload located at the bottom of the compressor contactor. Measure amperage of motor - check for
excessive amp draw.
Alarm 4 – Excessive Air Compressor Run
Issue: The air compressor has run for longer than 45 minutes continuously.
Answer:
1.
Check the pressure in the air storage tank. If the pressure is greater than 105 PSI and the compressor is still running it could
indicate a pressure switch issue. Call Potter Technical Support at 1-866-956-1211.
2.
Check the nitrogen generator system for leaks. See Page 23 for method.
Alarm 5 – Compressor Fail To Start
Issue: Contactor auxiliary contacts did not close.
Answer:
1.
Troubleshoot contactor wiring and functionality. See alarm 4.
2. Replace contactor.
To clear alarms, cycle power or press ALT then hold the
right arrow key for 5 seconds. Press ALT again to get
back to main menu. There is also a silence button on the
back of the Alarm Horn.
Alarm Horn
Silencer
Figure 21
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