Nitrogen generator fault analysis and maintenance are as follows:

Fault phenomenon

Cause analysis

Elimination method

1. The indicator is off

electroless

The switch is not closed

Blown fuse

Power transmission

Close the switch

Check the circuit, change the fuse

2, the pneumatic valve does not operate

Air pressure < 0.4Mpa



The solenoid pilot valve does not operate



Debris in valve

Check the air pressure. Increase the pressure

Check PLC circuit

Cable falls off, reconnect

Pilot valve broken, replace

Open pneumatic valve and clear

3. The analyzer is inaccurate

The digital indicator blinks



The data display is unstable

Clear drop in indication

Electromagnetic interference, change the circuit

Purity beyond the range

Analyzer calibration

Oxygen electrode replacement

4, the system pressure difference is large

The air handling system has high resistance

Check the air lines, replace the parts

When the nitrogen machine equipment is faulty, it is forbidden to turn on the machine to reduce the damage again, communicate with the manufacturer to eliminate the fault in time, find out the cause of the fault for elimination, maintenance, replacement, start-up, and ensure the normal operation of the nitrogen machine equipment.

Before the maintenance and repair work of the nitrogen machine equipment, the power supply should be cut off, the doors and Windows should be opened to ensure that the indoor oxygen content is greater than or equal to 21%, and the ventilation monitoring work should be done to avoid causing the maintenance personnel to inhale too much nitrogen and suffocation, and the system devices and pipes are in a state of pressure. During the maintenance of the equipment, remove the air pressure of the AB tower of the nitrogen machine equipment, and be sure to reduce the pressure of each pipeline to zero in order to disassemble the pipeline and system components, otherwise the pressurized gas will immediately expand and spray out, which will directly or indirectly cause personal injury. Storage tanks, adsorption towers, and buffer tanks are all Class I pressure vessels, which should be slowly increased and reduced when opening and stopping.