Model CFZY-XX

Ozone generator
(with oxygen generator )



Operation instruction













1
Content
Preface ----------------------------------------------------------------------------------------------------------3
Summary of model CFZY-XX ozone generator-----------------------------------------------------------4
Part I Summary for ozone generating unit of model CFZY ozone generator
ISummary of model CFY ozone generator--------------------------------------------------------------5
1Working principle-----------------------------------------------------------------------------------------5
2Structure characteristic-----------------------------------------------------------------------------------6
3Fittings and spare parts-----------------------------------------------------------------------------------7
4Figure,operation panel and kinds of functional keys and buttons--------------------------------7
IIRequirement to user--------------------------------------------------------------------------------------7
IIIWarning---------------------------------------------------------------------------------------------------8
IVInstallation----------------------------------------------------------------------------------------------- 8
VAdjustment and operation ------------------------------------------------------------------------------9
VIMaintenance and nursing to equipment--------------------------------------------------------------10
VIIFailure determination and resolution ---------------------------------------------------------------10
VIIIMethod to emergency of ozone generator occuring failure ------------------------------------11
l. Electric Schematic diagram ----------------------------------------------------------------------------12
Part II Summary for oxygen generating unit of model CFZY ozone generator
CHAPTER ONE OPERATION INSTRUCTION OF FY OXYGEN GENERATOR------------13
I. Basic Parameter and Operation Method of FY-XB Oxygen Generator-----------------------------13
1. Basic parameter of FY-XB Oxygen Generator--------------------------------------------------------13
2. Operation method of FY-XB Oxygen Generator------------------------------------------------------13
(1)External view of the machine and instruction of starting up and debugging----------------------13
(2)Automatic alarm function--------------------------------------------------------------------------------15
(3)Notice-------------------------------------------------------------------------------------------------------15
Chapter Two Principle, Structure and Functional Specification of FY Oxygen Generator---------16
2
I. Principle and Flow Chart----------------------------------------------------------------------------------16
II. Structure, Name and Function of FY-XB Oxygen Generating Unit--------------------------------17
1. Outline and Structure Chart of FY-XB Oxygen Generator-------------------------------------------17
2.Name and Function of Each Spare Parts of FY-XB Oxygen Generator-----------------------------18
Chapter Three Maintenance and Troubleshooting of FY Oxygen Generator-----------------------20
I. Maintenance-------------------------------------------------------------------------------------------------20
II. Trouble shooting-------------------------------------------------------------------------------------------21
1. Unusual indication of flow meter------------------------------------------------------------------------21
(1).No flow indication--------------------------------------------------------------------------------------21
(2).Over flowed fluctuation--------------------------------------------------------------------------------21
(3).Voltage abnormal alarm--------------------------------------------------------------------------------22
2. Oxygen concentration lowers obviously--------------------------------------------------------------- 22
(1). Detection method---------------------------------------------------------------------------------------22
(2). Reason and maintenance of oxygen concentration decrease--------------------------------------22























3




Preface

Thanks for using Model CFZY-XX Ozone Generator made by our company
This equipment uses air as gas source.
It is an industrial use equipment, and must be taken charged by professional on
installation, adjustment, operation and maintenance.
Before the installation and adjustment, operator must read this instruction book
attentively comparing with the equipment. For any confusions, please contact with
our company in time.












4


Summary of model CFZY-XX ozone generator
CFZY series ozone generators consist of CFY series ozone generator units and FY series
oxygen generator units. The ozone generator unit install above, the other below.
Using air as gas source, the fitting working and detecting environment is
temperature25,relative humidity70%. In case the condition is out of the range, the output of
ozone will reduce 10-15%, but attain the range, the output will comeback at once.
Due to installing oxygen generators inside, the products is required to place in dry and
ventilated room worked, for reason one: if split oxygen by using air indoor and putout nitrogen in
airtight condition long, the oxygen of air indoor will decline, and the concentration of ozone will
also decline. The second reason: molecular screen of adsorption tin in oxygen generator works in
humid condition will affect the nature life.
Our company produces three common series of CFZY ozone generators, i.e. CFZY-24B,
CFZY-36B, and CFZY-50B. The main parameters are as following:
Sheet I: Parameters for CFZY series ozone generator
Parameter unit CFZY-24B CFZY-36B CFZY-50B
Rated output g/h 24 36 50
Rated consumption W 1000 1500 2000
Equipment fuse A 8 None None
Module fuse A 3A*2 3A*3 3A*4
Net weight kg 75 95 131
Ameters indication A 1.5~1.8 2.2~2.5 (1.5~1.8)*2
Type of matching ozone
generator
Piece CFY-24 CFY-36 CFY-50
Type of matching oxygen
gernerator
Piece FY-6BA FY-8B FY-12B
Rated flowrate L/h 300 500 2*300
Note: Before operating, a, Take down the sealed nut of ozone outlet at first.
b, Take out the bubble shockproof mat under the air compressor in
oxygen generator.
In the following chapters, well introduction the operation, maintenance, nursing and so on
of ozone generating part and oxygen generating part of ozone generator, the operator should be
read it carefully.

5



Part I Summary for ozone generating part of model CFZY-XX ozone
generator
I. Summary of model CFY ozone generator
Ozone (O
3
is its molecular formula), is allotrope of oxygen. Its molecular structure is easy to
change under normal temperature and normal pressure, swiftly decomposing to be oxygen (O
2
)
and single oxygen atoms (o) automatically. Ozone is a high-effective oxidant without secondary
pollution, since it remains oxygen after it is applied.
As a kind of strong oxidant and disinfectant, ozone is widely applied to such industries as
water treatment (pure water, medium water and wastewater), foodstuff, pharmacy, chemical
oxygenation and edible fungus, etc.
1. Working principle:
Industrial use ozone generator usually adopts principle of effluvium synthesizes ozone to
produce ozone.

As drawing shown, when oxygen (or air) goes through alternation electric field which is
excited by high frequency high voltage power supply, part of oxygen molecule decomposes to be
two oxygen atoms through bombarded by high-speed electron. These oxygen atoms integrate with
other oxygen molecules to be ozone molecules. During this period, oxygen is just partially
6
translated to be ozone.


Following figure is the principle block diagram of ozone generator

As figure shows, oxygen flowing through flowmeter is excited by high frequency high
voltage electric field in ozone board to produce ozone. As seen, ozone generator mainly is
composed of ozone generating parts, which is called as Ozone board and high frequency high
voltage power supply, which is called as Module. Gas route and circuit inside the equipment are
being system by themselves, without mutual interference.
2. Structure characteristic
Our company produces many series of model CFY-XX ozone generator, such as CFY-3,
CFY-6,CFY-12,CFY-24,CFY-36,CFY-50,and CFY-75.
All these model ozone generator consist of ceramic medium air-cooled and board shape
ozone generating part (named as ozone plate), and high-frequency & high voltage power (named
as module); It takes oxygen as gas source and cooled by air instead of cooling water.
From the principle block diagram, we can know that Ozone plate and module are the core
parts of various specifications of ozone generator. It is special for Ozone plate and module of
model CFY-3 and CFY-6 ozone generator, however, for model CFY-12 and above is composed of
repeating CFY-12B ozone plate and CFY-12B module.
For example: Ozone generating unit of model CFY-12 ozone generator consists of one piece
of 12B ozone plate and one block of 12B module, and model CFY-24 consists of one piece of 24B
7
ozone plate which composed of repeating 12B ozone plate up and down, and two blocks of 12B
module.
This kind of module combination type structure provides clear hiberarchy and function,
which is not only easy for standardization production in batch, but also for operation and
maintenance.
3. Fittings and spare parts:
After unpacking, please check following fittings and spare parts:
3.1,1 piece Three-core single phase power line;
3.2,10 m Transparent PVC hose(used for ozone outlet hose)
3.3,some fuse;
3.4,1 copy operation instruction book;
3.5,1 copy maintenance card;
3.6,1 copy maintenance manual;
4. Figureoperation panel and kinds of functional keys and buttons
Place the machine on the stable operation desk or level ground. Get familiar with the figure,
operation panel and functional keys and buttons of the ozone generator.
Front view:
Ampere meter: indicate working current.
(It shall record the stable current initial value after adjusting the machine. This current value is
very important which used for compare when failure occurs.)
Working indicating lamp: green, expresses normal working
Failure indicating lamp: yellow, shown and given a alarm in case of failure of cooling system.
Start-up button: green
Stop button: red
Flow meter: regulating the oxygen flowrate to control the ozone generating capacity. The rated
flow of different devices should accord with sheet 1 of page 3.
Side view:
Cooling fan: Air coming into right side and going out from left side. The inlet/outlet should not
be blocked (during operation).
Back side:
Power socket: Three core single phase power socket, for power Input(230V,50/60Hz)
Fuse box: containing 45X20 fuse
Ozone outlet: for outputting ozone.
Grounding nut: used for the machine shell grounding.
8

II. Requirement to user
1. Gas source: Because of installing oxygen generator inside, CFZY series ozone generator can change
air into oxygen with PSA principle, and then takes this oxygen as its source, therefore, the air around
the equipment is gas source. It is required that the environment of equipment should be: clean, dry,
ventilated
2. Power supply: 230V50Hz AC is required by ozone generator, distribution panel board shall be
equipped with air switch (or knife switch) and three-hole single- phase socket which rated power
consumption shall be higher than that of relevant different ozone generators shown as Table 1.
Grounding foundation of three-hole socket must be grounding, and connecting method of fire line and
zero line must be correct.
Note: Required power supply is ' I , stabilized voltage power supply is
additionally mounted for which is above 250V or below 210V, otherwise, it is easy to damage the
power module for long-term running under super low voltage or high voltage.
3. It is required that machine room must be dry, cool with good ventilation (moisture room easily
causes ozone boards high voltage power crossing, to damage the ozone board). Using condition:
environment temperature: 5~45; relative humidity>90%.Ozone generator can run continuously
under the above condition.
4. Grounding: Grounding point of equipment must be strictly grounding (Note: zero line cant be
regarded as ground line).

III. Warning
1. Laypeople is prohibited to disassemble the machine shell without authorization, for ozone generator
is under high voltage.
2. This machine is metal shell. In order to ensure safety, it must have reliable grounding (absolutely
prohibit from taking Zero line as Ground line).
3. Power must be cut off when replacing fuse.
4. It must strictly prevent water back flowing into ozone generator from the ozone outlet.
5. The combustible (solid, liquid, and gas)is prohibited strictly be kept in machine room.
6. It is strictly prohibited that using this machine to deal with any combustible liquid or gas, otherwise,
possibility of explosion will occur.

IV. Installation
It must read this instruction book carefully before installation and adjustment.
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1. Place the machine at proper position, ventilation sides can not be block off, above 50CM space is
better to be kept for both sides.
2. It must do preparation for electricity, grounding as per III requirement for userbefore installing the
equipment.
3. Take down the sealed nut of ozone outlet and screw down the underside door of machines face view,
then take down the face panel of oxygens noiseproof box, take out the bubble shockproof matthis
shockproof is use for preventing intense shock of air compressor in transportation. Ozone outlet hose
shall be connected until the machine start up and produce ozone and be connected check valve (fitting
followed with the equipment).

V. Adjustment and operation
1. Start up the machine
(1)Switch on the power using single phase three core power line.
(2)Push the green button, the green indicating lamp turn on, and ozone generator start to work.
Check if the indication of the Ampere meter matches corresponding one on the indicated value for
ozone generator of table 1 in this instruction book. If they basically match and the current is stable,
and ozone can be smelt from the outlet, it shows the unit is working well. Record the current value for
future reference. Please record the working initial current value of this unit is A.
(3) That three seconds after pressing green button is the prepareing phase of ozone generator for
reserve gas. After this three seconds, oxygen generator start to pressurize and discharge pressure
normally and periodically. Equipment start to run in normal.
(4) Distinguish normal working sound of oxygen generator
When oxygen generator runs in normal, it will send out two regular sounds after turned on:
sound of compressors motor and cylinders piston runs is ululantin regular.
Recurrent switching sound:
The switching sound is very regular in cycles.
Users shall be familiar with the normal running sound of oxygen generator, for it is very
important to distinguish the failure. Every day, turn on, and listen silently for a while. After
distinguish the sound is in normal, then read the value of flowmeter and working current value of
ozone generator. If all are in normal, it can affirm that oxygen generator and ozone generator and
ozone generator run in normal.
(5) Regulate the flowmeter of ozone generator panel, so that the float of flowmeter reach the
requiring number of rated flow, and feel at the ozone outlet by hand, it can be felt that the air is
blowing out.
2. Turn off the machine
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(1) Push the red button to stop ozone generator.
(2) Close the air switch (knife switch) of the distribution panel board.
3. Operation:
The Operation procedure of ozone generator of daily using is the same as adjustment.
Operation of turning on the machine:
(1) Turn on the power and air switch.
(2) Push the green start-up button, and the machine start to work. Check if the indicating lamp
and current value of Ampere meter is normal, and listen if the oxygen generating part works as per
normal working sounds, if not, stop it and check it at once.
Check if the output of ozone is normal, if so, user can start to run the machine.
Operation of turn off the machine:
It shall operate as per the counter-procedure of turning on the machine.

VI. Maintenance and nursing to the equipment
Any equipment shall have periodical maintenance and nursing. Since Model CFY ozone
generator uses air-cooling, air from outside blows into inside of the equipment ceaselessly, as time
passes, a mass of dust must be carried into the inside, attaching on the ozone plate, two kinds of
hazard are brought about from the above as following:
(1) Lower the efficiency of heat dissipation, therefore, affect the ozone output capacity of
ozone generator;
(2) Lower the isolating power of each insulating layer, without nursing for long time,
possibility of coming out electric- crossing and breakdown insulating layer will occur.
Therefore, the equipment must carry out periodical nursing.
Method and content of nursing is as following:
(1) Cut off the power;
(2) Screw down the side panel of both side of machine with screwdriver, and unplug the inset
of fan and take down the grounding nut of fan.
(3) Blow off dust in the machine with high-pressure air, especially the dust on ozone plate. For
the dust cannot be blown can be removed by dry brush (toothbrush), then blow. Please note that
ozone plate cannot be washed with water.
(4) Wipe off accumulated dust on the fan blade with dry cloth, if it can not be removed, please
use dry brush (toothbrush) to get rid of it;
(5) Keep record of nursing content: time, period, signature of personnel who does nursing
and person in charge carries out inspection and give signature.
(6) Periodical nursing shall be carried out one time per half year generally.
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VII. Determination and Resolution of Failure
Variety of current value of each ozone generators ammeter is the main means to find and
determine the failure.
During the equipment in operation, working current value is very stable, it seldom changes
unless power supply voltage has some change. In case working current value of Ampere meter
lowers exceed 0.5A, it shall check whether there is any failure on this machine.
Please refer to the first chapter ofmaintenance manual)for the method of examination and
resolution.

VIII. Method to emergency of ozone generator occuring failure
If oxygen generator in model CFZY-XX ozone generator occurs failure, which can not be
removed at short time, while ozone generator at upper side runs normally(working current value is
normal) and users requires the ozone urgently, thus, oxygen bottle will be the best choice to this
situation. The method is as following:
(1) Remove back cover board, pull out power socket(white) of oxygen generating unit, stop
the oxygen generating part of ozone generator.
(2) Hire a industrial oxygen bottle(used for welding) from oxygen station, deploy a reducing
valve, and connect gas outlet of reducing valve and gas inlet of flowmeter of ozone generator
using transparent PVC hose.
(3) Two pieces air pressure gauges are available on the reducing valve, high pressure
gauges shows pressure in bottle, and low pressure gauges shows outlet pressure of reducing valve.
Please note that general reducing valve used for welding which low pressure gauges full range is
2.5Mpa,but this machine required oxygen low pressure gauges indication only is 0.050.1Mpa,
only 0.5~1 minor meter is shown.
(4) Turn the screw of reducing valve counter-clockwise, then open the angle of oxygen bottle, now, the high
pressure gauge of reducing valve shows the oxygen pressure inside of the bottle(the oxygen pressure in a newly
filled bottle is normally 12~14Mpa).Then slowly turn the screw of reducing valve clockwise to make the
indication of the low pressure gauges finger only 0.05~0.1Mpa(Note: only a small metre on low pressure gauge,
and dont open too much).




12


IX. Electric Schematic Diagram


Note: This diagram is used for model CFY-24, which needs increase or reduce the amount of
module comparing with the diagram of other models.

13
Part II summary of oxygen generating part of model CFZY-XX ozone
generator
Chapter One Operation Instruction of FY Oxygen Generator
I. Basic Parameter and Operation Method of FY-XB Oxygen Generator
1. Basic parameter of FY-XB Oxygen Generator
Table 1
Spec.&
Type
Rated
oxygen
flowrate
NL/min_
Oxygen
concentra
tion
Outlet
pressure
MPa_

Power
W_
Applied
ozone
output g_
Working
environment
Working
power
FY-6B 6
90% 0.06~0.08
650 24
Temp.5~35
RH80%

220V
/50Hz
FY-8B 8 650 36
FY-12B 12 1300 50
FY-16B 16 1300 75
FY-24B 24 1950 100
14
FY-32B 32 2600 150
Note: 1) FY-6B and FY-8B are composed of single set of oxygen generating unit respectively;
2) FY-12B and FY-16B etc. are made of two sets or more oxygen generating units by parallel
connected.
2Operation method of FY-XB Oxygen Generator
(1) External view of the machine and instruction of starting up and debugging.
A. External view

External View of FY-8B Oxygen Generator

External View of FY-16B Oxygen Generator
15

B. Instruction of starting up and debugging
a.Place the oxygen generator on the flat ground, keeping above 0.5m space by all
around. Turn on power and switch, oxygen as required will come out continuously. Before
operating, adjust the floating ball to the rated oxygen flow rate listed on the Table 1, and
please note the conversion as: Unit for rated flow rate listed on the Table 1 is NL/min, while
unit of flow meter of ozone generator is NL/h.
b.Distinguish to the sound from normal running of oxygen generator
When the oxygen generator works normally, there are two kinds of sound when it starts
running:
Sound from motor of compressor and piston of cylinder, which is regular sound as
Woo .
Periodic switch sound as Woo bo qi

It is very important to distinguish the fault through checking the sound of normal
running, users shall note whether the sound is normal or not after turning on the machine.
(2) Automatic alarm function
Normal working voltage of oxygen generator is 200~240V, when the voltage is above
240V or less 200V, the compressor will not work normally, and the machine will send alarm
as buzzing automatically, at this time, user must turn off machine immediately. Where the
voltage is unstable, manostat is required to be fixed to ensure the oxygen generator work
normally.
(3) Notice
Room for the oxygen generator located shall be kept ventilation, clean and dry,
inflammable goods are not allowed to be placed.
Layman is not allowed to disassemble the machine without permission. If change
the fuse or maintain the machine, it must cut off the power supply.
The machine shall be grounded correctly and reliably.
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Chapter Two Principle, Structure and FunctionalSpecification
of FY Oxygen Generator
I. Principle and Flow Chart
FY-XB oxygen generator adopt advanced physical oxygen generating principle,
separate oxygen and nitrogen of air directly through the function of molecular sieves
pressure swing adsorption (PSA), to get high concentration oxygen and provide oxygen
persistently.
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Flow Chart of FY-6B/8B PSA Oxygen Generator

Principle of pressure swing adsorption: when pressuring, molecular sieve adsorb
Nitrogen (Nitrogen molecular is adsorbed in the micropore of molecular sieve), while
oxygen molecular is few adsorbed, most of oxygen molecular pass through the particle
surface of molecular sieve; under normal pressure, desorb (exhaust the nitrogen from the
micropore of molecular sieve) and backlash it to the air with part of oxygen. Run in cycle, it
can reach the purpose of separating the oxygen from the air continuously. In order to
separate the oxygen continuously, two adsorption tin are usually used, one is for
pressuring, adsorbing and generating oxygen, the other is releasing, desorbing and
exhausting nitrogen. With such cycle running, continuously come out oxygen with above
90% oxygen concentration. (See page 10 for details of outline structure )

II. Structure, Name and Function of FY-XB Oxygen Generating Unit
18
1. Outline and Structure Figure of FY-XB Oxygen Generator





19

Outline and structure figure of FY-6B/8B oxygen generator

Note: Except for the adsorption tin is different, external and internal structure of FY-6B is
totally same as that of FY-8B.

2. Name and Function of Each Spare Parts of FY-XB Oxygen Generator
Please refer to the photos and flow chart to know each parts name and function of this
series oxygen generator.
Take FY-8B as example, carry out description from airflow direction. Other FY-XB series
oxygen generator is connected in parallel based on FY-6B/8B oxygen generator, with
same principle and maintenance, no more comments hereafter.
(1)Filtrating cup
A high-effective filtrating cup is fixed on the FY-8B oxygen generator, which can filter
dust in air, to keep the molecular sieve of adsorption tin. It shall be changed termly as
working environment required.
(2)Air compressor
It is the main parts of FY-XB oxygen generator, which function is to compress the filtered
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air to be 0.20.01Mpa compressed air.
(3)Air tube
The material of air tube is silicon rubber. Since oxygen generator vibrates
during running, there will be crack and air leakage occurs when air tube
bumps against other objects. Please choose spare parts from our company
or heat resisting silicon rubber tube when change the air tube.
(4)Condenser
It carries out cooling down the high-temperature compressed air output from the
compressor, which shall be cleaned dirt retention termly.
(5) Fan
It is applied to cool down condenser and compressor.
(6) Air-water separator
It is applied to separate compressed air and condensate water.
(7)Control board
Control board comes out timing signal of adsorption switch. There are two luminotrons
with green color and red color on the board turning on and off alternately and continuously,
indicating switchover timing. Its output controls two 2-3 solenoids on and off, so as to
control adsorption tins adsorption and desorption. The board also has function of alarm
for over voltage and under voltage.
(8) Transformer
It supplies power to thecontrol board.
(9) Adsorption tin A and B
Adsorption A and B are the core parts of this machine, inside of them are molecular
sieves. When 2-3 solenoid A turns on, compressed air carries out pressurizing the
adsorption tin A and adsorbing nitrogen to generate oxygen through the 2-3 solenoid A. At
the same time, adsorption tin B carries out releasing, desorbing and exhausting nitrogen
through 2-3 solenoid B. During this period, high-concentration oxygen is come out
continuously.
(10) Two position threeway(2-3) solenoid A and B
2-3 solenoid A and B carry out pressuring, adsorbing nitrogen to the adsorption tin under
the control of control board, so that the oxygen flows the adsorption tin smoothly, at this
time, 2-3 solenoid B carries out reducing pressure, desorbing and exhausting nitrogen to
the adsorption tin under the function of spring since there is no signal from control board.


21



Timing chart from control board to 2-3 solenoid A and B is as below:

(11) One-way valve
Its function is to prevent the oxygen in the oxygen tank not backflow to the adsorption tin
when the adsorption tin reduces pressure.
(12) Oxygen storage tank
Its function is to accumulate oxygen and stabilize the output pressure of oxygen.
(13) Bridging
It is a transparent hosepipe, restriction chock is built in. Little oxygen from the adsorption
tin A flow into adsorption tin B through the bridging to backlashes nitrogen.
(14) Pressure regulating valve
Pressure regulating valve and oxygen store tank are connected by the screw thread with silicon
rubber sealing ring in the middle. The valve can regulate the pressure of output of oxygen, which
regulating range is 0.06-0.08Mpa. Pressure increases by clockwise, while decreases by
anticlockwise. Value of output pressure is relative with the oxygen concentration, normally
it is not regulated by large range.

Chapter Three Maintaining and Trouble Shooting of FY
Oxygen Generator
22
I. Maintaining
1. Room where oxygen generate is located shall be kept ventilation, clean and dry.
2. Clean each parts termly, such as compressor and condenser, etc.
3. Replace filtering cup termly. When carrying out replace, draw out the inside filtrating cup
by force, and replace with new cup. The period of replacing cup is fixed as per operating
environment; normally it is 2-12 months.
II. Trouble Shooting
There are three kinds of troubles may occurs on the oxygen generator, which is stated as
following one by one.
1. Abnormal indication of flow meter
(1)Non flowrate indication
The floater of flow meter does not floating up after normal starting up.
Refer to Table 3 for Trouble phenomenon, trouble reason and trouble shooting.
Table 3
Trouble
phenomenon
Trouble reason Trouble shooting

Air compressor
does not work(no
running sound of
compressor)
Source jack socket of
compressor is not contact
well, no power supplied.
(1)Repair or replace jack socket
or supply power directly.
(2)Check the fuse.
Capacitance is damaged. Replace the capacitance.
Compressor is damaged. Replace the compressor.

Control board is
damaged. (can
hear compressors
running sound, but
no switching
sound)
Power light on the board is
off.
(1)Check whether the 15V
transformer is normal or not.
(2)Replace the control board.
Switching light on the board
is off.
Replace the control board.
Main pipeline inside
the oxygen
generator is crack
seriously. (can hear
running sound,
while other leakage
noise also exist)
Main pipeline inside the
oxygen generator broke
seriously, and the
compressor leaks air largely.
Replace the main pipeline, use
silicon rubber as material.

(2)Over fluctuation of flow rate
When the oxygen generator works normally, the indication fluctuation of flow meter is
very small as normally is 10%. When the fluctuation value is 30%~50% of the normal
23
value, it shall be judged as trouble occurs on the oxygen generator.

Refer to Table 4 for Trouble phenomenon, trouble reason and trouble shooting.
Table 4
Trouble phenomenon Trouble reason Trouble shooting
Abnormal switching
sound (can hear
compressors running
sound, but switching
sound is abnormal)

Control board is
damaged, one switching
light is on, the other is
off.
Replace the control
board.
2-3 solenoid is
damaged.
Replace the 2-3
solenoid.
Above part of the
adsorption tin leaks.
(switching sound and
compressors running
sound are both normal)
Pressure regulating
valve leaks or the
diaphragm inside valve is
damaged.
Replace the pressure
regulating valve or
replace the diaphragm.
Oxygen storage tank
breaks and leaks.
Replace the oxygen
storage tank.
The bridging leaks. Replace the bridging or
remove the leakage
pipe.

(3) Alarm of voltage abnormal
On the control board, there is set supply voltage alarm line. When the AC voltage value
is higher than 240V or lower than 200V, the alarm send out harsh sound as screech
When hearing the alarm, user shall check the supply voltage, if the voltage is unstable,
the user shall equip a manostat.
2. Oxygen concentration lowers obviously.
Oxygen concentration of the oxygen generator under normal going shall be equal or
greater than 90%.
(1) Detecting method
Adjust the flow meter to the rated oxygen flow rate, so that the outlet of oxygen
generator has oxygen output, at this time, take a oxygen analyzer to test whether the
oxygen concentration meets the required standard or not.
(2) Reason and maintenance of oxygen concentration decreasing
Air leakage
Any section of air circuit of the oxygen generator occurs leakage will result in under
pressure when the adsorption tin pressurizing, bringing decrease of oxygen concentration.
Check the leakage point and remove it.
Abnormal switchover
24
When the switchover is abnormal, though the change of air flow rate is not large
15%20%_, oxygen concentration may also lowers. Check the control board and 2-3
solenoid whether sometimes is normal and sometimes is abnormal, so as to replace the
damaged accessories.
Compressor ageing
The pressure always cannot be up, normal output pressure of air compressor is about
0.180.22Mpa, since the compressor is aged, the pressure cannot be raised even if the
pistons snap ring looses. Replace the compressor after confirmation.
Molecular sieve inside adsorption tin ageing
Service-life of molecular sieve is about above 5000 hours. After two years operation,
if the oxygen concentration lowers, it shall replace the adsorption tin.
Pressure regulating valve is damaged
If air pressure is regulated incorrectly, the produced oxygen concentration will not
meet the standard. If sealing silicon rubber ring inclines, it shall align and screw it; if the
sealing ring ages and breaks, it shall be replaced.