Nitrogen machine fault analysis and maintenance
Time：2014-05-15 17:34:23 CTR：
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.
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.