Lonfian Scitech Jay Oxygen Concentrator Service manual
Service Manual
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LONGFIAN SCITECH CO., LTD
SERVICE MANUAL
FOR HIGH PRESSURE GENERATOR
No.401,4th Floor, Block 1, Building 1, College Tech. Zone, No.5699 North
Second Circle Road, Baoding, Hebei, 071051, China
Tel: +86-312-3169262 Fax: +86-312-3169301
www.longfian.com
Service Manual
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Contents
▇ External Structure
..............................................................................................................
2
▇ Main Service Tools and Accessory Materials
.............................................................
2
▇ Internal Structure and Name of Major Components
...................................................
3
▇ Dismantling Method.......................................................................................................... 3
▇ Working Principle
..............................................................................................................
6
▇ Circuit Description
.............................................................................................................
7
▇ Key Indicator...................................................................................................................... 9
▇ Major Fault Phenomenon and Maintenance Method
.................................................
9
▇ Accessory
.........................................................................................................................
12
▇ Appendix
............................................................................................................................
13
Service Manual
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█ External Structure
External Structure :see figure 1&2，the parts :See table1
Figure 1 Figure 2
S/N
Name
123456789101112131415
flowmeter
LCD display
power switch
pressure gage
indicating lamp
pressure regulating
valve
side panel
Air filter
front panel
top panel
oxygen outlet
back panel
fan
power line
outfall
table1
█
Main Service Tools and Accessory Materials
Main Service Tools and Accessory Materials: see table 2
Tools
Accessory Materials
Name
Model
Name
Model
Phillips screwdriver
400mm, 200mm
704 silica gel
704
Slotted screwdriver
200mm
Impact wrench
6mm、9mm
8~10、12~14
13~15、14~17
19~22
Peeling pliers
Nipper pliers
PU tube
nylon tube
Φ12×10
Diagonal cutting pliers
φ10×8
Tube cutter
Φ8×6
Electric soldering iron
35W
Φ6×4
Avometer
FLUKE 17B
Oxygen density tester
handheld
Solder wire
0.6
Pressure gauge
0~0.4Mpa
7
3
1
2
4
5
6
8
9
11
12
13
14
15
10
Service Manual
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Table 2
█
Internal Structure and Name of Major Components
Front elevation : see figure 3；Left elevation: see figure 4；Right elevation :see figure 5；Back
elevation: see figure 6
Figure 3 Figure 4
Figure 5 Figure 6
█Dismantling Method
4.1 Dismantling the shell
4.1.1
Open the side panel，press/lift the hinges installed in the side panel(Two hinges),and then
remove the side panel(See figure 7）
4
.1.2 After removing the side panel, unscrew the retaining screw in the top panel, and then can
remove the top panel(See figure 7）
4.1.3Using Phillips screwdriver, unscrew the retaining screw in the front panel and then remove
the front panel（See figure 8
）
4.1.4 When removing the back panel，take down the fixed clamp of power line, take the power
line of fan apart installed in the back panel and unscrew the retaining screw .
Service Manual
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Figure 7 Figure 8
4.2 Dismantling front panel
Take the tube apart that connect with pressure valve and flowmeter,take down the 3 pin
connector of LCD display, unscrew the retaining screw and then can remove the front panel
（See figure 8）
4.3
Dismantling
PCB board and power switch
After removing the front panel, the area of PCB board will be come into view. Take all the
connector apart installed in the board, it include: valve’s wiring (vent valve, inlet valve, balance
valve, drain valve), fan’s wiring, dryer’s wiring, compressor’s wiring, power switch’s wiring(24V),
7-pin connector of LCD display, 5-pin connector of lamp panel, 3-pin connector of temperature
sensor, power supply wiring of oxygen sensor (5V), 4-pin connector of power failure alarm, the
connecting tube of pressure sensor, the power line in the Wire terminal. Using Phillips
screwdriver, unscrew the retaining screw in the PCB board and switching power supply and then
can remove the PCB board and switching power supply(See Appendix 2)
4.4 Dismantling dryer, molecular sieve and oxygen tank
1、
unplug the connecting tube between dryer and compressor, dryer and inlet valve, dryer and
drain valve; Unscrew the retaining screw installed in dryer and then can remove the dryer by
using Impact wrench
2、
unplug the connecting tube between valves , zeolite sieve and oxygen tank. Unplug the
connecting tube between Exhaust valve and Intake valve using #19 wrench; Equalizing valve (#13
wrench); Using #13 wrench,uncrew the screws between molecular sieve and oxygen tank ,unplug
the tube, take the retaining screws down in the holder of Intake valve and equalizing valve,
remove the holder and then unscrew the retaining screws between the molecular sieve and
cabinet using Phillips screwdriver. The molecular sieve was taken off. (See figure 9)
Retaining screw
（top panel）
Retaining screw
（side panel）
Retaining screw
（front panel）
Retaining screw
（front panel）
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