Acm619 Service Manual (s)

ACM619 Service Manual I

ACM619 Anesthetic Workstation

IPPV O2

Ppeak f

kPa /min

PEEP MV

kPa

PCV

L

0        5

0        5

VOL %

         4

       3

N2O

O2

O2

N2O

  1

       3

    2

300 600 900 1200

VOL %

         4

  1

    2

AIR

AIR

1500 PIPE LINE

kPax100

O2

PIPE LINE

PIPE LINE

kPax100

kPax100

N2O

AIR

CYLINDER

kPax100

O2

CYLINDER

kPax100

N2O

CYLINDER

kPax100

AIR

O2+

Fig.（ Fig.（6102535 Front1） Front1）

II

Gas Part： 1） Operation Principle：

1. O2 Cylinder  （Optional） 2.O2 Pipeline Cylinder  （Optional）6.AIR Pipeline

3.N2O Cylinder  （Optional）

4.N2O Pipeline

5.AIR 

7 Pressure gauge（0-1000kPa） 8 Pressure gauge（0-25000kPa）

9. pressure regulator （output 400kPa）10. pressure regulator （output 400kPa） 11. pressure regulator （output 400kPa） 12 filter

13. unidirectional valve 14. relief valve（840kPa） 15. alarm shift valve

（120kPa-200kPa） 16. alarm

17. gas storage cylinder 

18. pressure reducing I valve（output 270kPa） 19. N2O driven regulate valve

20. ventilator pressure reducing I

valve

（Output 250±10kPa）21. proportion valve

22. electromagnetic valve

（output 50±5kPa） 24. expiration unidirectional valve

25. atmosphere

26. relief valve（6kPa） 27. linage

flowmeter (0.1-2L/min;2.5-10L/min)

28. support circuit 29. evaporator （0.2%-5%） 30. relief valve（38kPa）

31. O2 f lush valve (25L/min-75L/min)

32. Venturi valve33. Inspiration unidirectional valve

unidirectional valve  

23. ventilator pressure reducing II valve

patient

35.O2 concentration sensor

39. absorber  （1000mL×2）

（0-6.5kpa） 42.30mm exhaust outlet

36.flow sensor

37. pressure sample interface 38.

40. manual/ mechanical ventilator control 43. Manual bag

34. Expiration

44. Bellows

41. APL valve

45. relief valve (0.2kPa-0.3kPa)

46.30mm exhaust outlet Operation Principle compendium：

ACM619 Anesthesia Machine has O2, N2O and Air three gases and according to CE standards, it has two air supply ways, Serial number is 1、3、5 is the Cylinder inlet(back-up), and the serial number 2、4、6 is the Pipeline inlet (common usage), the pressure of Pipeline gas should set as 280kPa~ 600kPa.After the gas into the machine, it will be through the filter (12) to be filtrated the impurities and grains, and the Pressure gauge (7、8)will display the gas pressure, cylinder gas（1,3,5）is reduced to 400 kpa by  pressure regulator(9,10,11) , connecting with the relief  valve(14), then paralleling with the pipeline gas by unidirectional valve (13)

The gas supply failure alarm system is made of unit (16) ,

alarm shift valve for oxygen ,alarm （15）

gas storage cylinder(17) and unidirectional valve(13), When the gas pressure is higher than

200 kPa, the gas will be through the unidirectional valve (13) into the gas storage cylinder(17), until the gas storage cylinder’s pressure is the same with the gas pressure. If the pressure controlled shift valve (broken line) is on the position 1(left), the gas is closed. When the gas pressure is less than 200kpa, the  pressure controlled (broken line) shift valve is on the position 2(right), the gas of the gas storage cylinder  flows through the shift valve and blows the alarm unit. The alarm time is not less than 7 seconds.

one part of the O2 gas enters into the ventilator, then through the primary pressure reducing valve I (20), reducing the pressure to 250±10kPa, the main gas enters into the  bellows(44)through  proportion valve(21) to supply dynamic for breathing. The auxiliary gas   passes through electromagnetic valve (22) and secondary pressure reducing valve (23) , enters into expiration valve (24), meanwhile, the expiration valve connects with atmosphere (25) and relief valve (26). When inspiration, ventilator controls the proportion valve (21), and turns on in accordance with the set tidal volume, at the same time the electromagnetic valve (22) is connecting, and the gas pressure is reduced to 50±5kPa through the secondary pressure reducing valve. The controlling

expiration valve 24 is closed, the main gas is separated with the atmosphere and the driven gas is produced to press bellows to inspiriting. When expiration, proportion valve is closed,

meanwhile, electromagnetic valve (22) is closed, too. The gas from auxiliary gas channel is released by electromagnetic valve, then expiration unidirectional valve opens, the driven gas is released to atmosphere by expiration unidirectional valve. If accident happens during inspiration, say, too much gas supply, pressure increasing, in order to protect the patient, relief valve 26 can automatically open to reduce the

pressure when pressure grows to 5.5~6kPa.

O2 is reduced to 270kPa by primary pressure reducer 18 and enters into the linkage flowmeter (27). At the same time, the pressure reduced O2 controls the N2O’s in an out by N2O driven adjusting valve. When the O2 pressure is lower than 200kPa~120kPa,   N2O is cut off; when the O2  pressure is higher than 200kPa~120kPa, the N2O enters into the linkage flowmeter (27). And the air  source also enters into the linkage flowmeter(27) by primary pressure reducing valve (18)

The pressure reduced O2, N2O, Air is mixed in the linkage flowmeter 27, then passes through   by-pass valve (28) and enters into the vaporizer; after mixing with the anesthestic agent in accordance with the set proportion, the mixed gas enters into the circle absorber through Venturi valve(32)

(it is consisted of the elements from 33 to 43). At the same time, the pressure reduced O2 also enters into the Venturi valve by O2 f lush valve (31), and then into the circle absorber. The working procedures of the circle absorber (it is consisted of the elements from 33 to 43). Setting the switch of Manual/ mechanical to “mechanical”, and the ventilator works to  pressure the bellows to let the gas entering into the circle absorber, and then this gas passes to the patient 38 through unidirectional valve (33). when expiration, pressure of bellows releases,  pressure of patient lung release CO2 by expiration unidirectional valve (34) and make a chemical reaction with sodalime which is in the absorber (39). if the too much gas compensation quantity or other reasons cause the end expiratory pressure higher than the set pressure of spill valve 0.2 kPa ~0.3 kPa, the

spill valve opens to release the gas Setting the switch of Manual/ mechanical to “manual”, anaesthetist uses the manual bag to supply gas to patient, and make the gas exchange.At the same time, in order to protect the patient, you should set the safety pressure of APL valve. When the pressure is higher than the set value, exhaust gas will be exhausted from exhaust outlet (42)

2） Common Malfunction （1）Circle absorber leakage First to test the vaporizer’s connecting to see whether it leaks.

Checking the leakage of circle absorber  Under the manual condition, using a silicone tube to connect the inspiratory outlet and expiratory outlet.

Opening the flow meter slowly to increase of the pressure of the absorber’s gauge to 3KPa, then close the flow meter 

Observing the pressure gauge for 2~3 minutes. If the indicator of the pressure gauge doesn’t drop, it expresses that the circle absorber doesn’t leak. Testing the folding bag and spill valve of the bellows assembly, ff the circle absorber leaks, please check whether the absorber is tightened.

（2）Spill valve’s adjustment Dissembling the bellows assembly

Unscrew the three screws and take down the cover, adjust the place of the pressure nut to change the  pressure value.

Screw

Pressure adjustment nut

Rotate the nut anticlockwise to increase the spill valve’s pressure value; rotate nut clockwise to reduce the pressure value. After adjustment, assemble the bellows again. After the machine works well, observe the airway pressure gauge on the circle absorber, and the end-expiratory pressure should be 0.2~0.3KPa.

Ⅲ

1

Electric Part： . Operation Principle

Anesthesia machine wiring diagram

ib. diagram, the left side “power supply”， 220V or 110V via X1entrance ventilator,

through magnetism ring L1, L1

for shield interfere comes from of power supply. Live wire (L), Null Line (N), in series 8amp. fuses, connect with switch S1, earth wire(E) connect with the machine shell.

From of S1 lead two line, L and N. One joint 2A slow fuse

via capacitance C1, C2 which fixed on the machine shell connect with the switch U1, the another one joint 2A quick  fuse connect X2, X3, X4 together with E which one on the shell. Power switch U1 output two wires, Earth wire GND and 24V, connect with electrical outlet X2 on the control board A1. Control board A1： Electrical outlet X7 output 5 lines, “D” shape outlet which designed for signal interference shielding, two for oxygen concentration, two for manual switch, five for coupler test board. Oxygen concentration 1

Manual switch

2

GND

Coupler test board

1

2

1

Signal

GND

+5V

2

3

Signal

Signal

4

5

Signal

GND

Electrical outlet X8, three lines connect to buzzer board. 1

2

3

+5V

GND

Control board

Electrical outlet 5, connect to Proportional Valve Controller: 1

2

3

4

Control board

GND

+12V

+24V

Gray

Black

Red

Purple

Proportional valve controller output: Black

Red

On-off

+12V

Electrical outlet 4, connect to electromagnetic valve 1

2

Control board

+12V

Electrical outlet X11, 26 core cable connect to the LED display board A2. 1

2

3

4

5

6

+5V

+5V

GND

GND

PVC setting

VCV setting

8

9

10

I:E setting

Respiratory rate setting

TV setting

11

12

13

14

Confirm button

Optical encoder OC1

Optical encoder OC2

Display board D2 Chip

7 Inspiration pressure setting

select signal 15

16

17

18

VCV Lights

Display Board D1 Chip

PCV Light

SCLOCK Bus signal

select signal

19 SDA Bus signal Line 20~26 “Empty”. Electrical outlet X6 1

2

3

GND

D1 Serial ports TXD end

D1 Serial ports TXD end

Electrical outlet X10 1

2

3

4

5

6

7

-12V

Empty

Empty

DGND

5VD

EGND

12V

Electrical outlet X11 1

2

3

4

GND

Pressure analog output

Flow analogy signal output

Flow analogy signal output

LCD Display 12V Input

Inverter 

High-voltage output Cable connected to upper board.

LED Display board A2：

26 core cable X2 connect with A1X1 6 core cable X3 connect with shuttle button.

10 core X2 connect with upper board X4

Connect with the membrane board

Electrical outlet X3（6 core） 1

2

3

4

5

6

GND

Confirm button

GND

shuttle button OC1

shuttle button OC2

+5V

Electrical outlet X2 connect with electronic board electrical outlet X4 (10 core) 1

2

3

4

5

STBY Indicator light

STBY

MENU

Mute

RESET

setting

setting

setting

setting

6

7

8

9

10

LCD display setting

Confirm

Shuttle button

OC1setting

Shuttle button

OC2 setting

GND

Electrical outlet X4 (19 core) 1 STBY Indicator light

2 STBY setting

3 MENU setting

4 Mute setting

5 RESET setting

6

7

8

9

LCD display setting

TV Setting

Respiratory rate Setting

I:E Setting

11

12

13

14

15

PCV function

IPPV function

PCV indicator light

IPPV indicator light

Empty

16

17

18

19

Empty

Empty

GND

GND

Electronic board

Electrical outlet X6, serial interface, used for machine debugging. The others tie-in please refers to the circuit board instructions.

10 Inspiration pressure setting

2

Parts testing

Proportional valve

Yellow/Yellow

Yellow-green/Yellow together put in the right side jack.

Down Up

ENTER 键

1． Connected proportional valve and the controller as the indication above; 2． Turn on ventilator, long press ENTER for 5 seconds to enter setup menu; 3． Into the INP (input) menu, by pressing the down button to INP = 0 ~ 5V, the display interface to the END option,  press ENTER exit. 4． Into the OUT (output) menu, then enter the UALU (body type) menu, by pressing the down button to set to 2833, the display interface to the END option, press ENTER exit; 5． Into the OUT (output) menu, then enter the ADJ (adjust coil) menu, by pressing the down button to LO (low) = 250mA, so that HI (high) = 400mA, the display interface to the END option, press ENTER exit; 6． Into the CUT (screen) menu, by pressing the down button to make CUT value = 0, the display section to the CUT option, press ENTER exit; 7． Into the CUT (screen) menu, by pressing the down button to make CUT value = 0, the display section to the CUT option, press ENTER exit; 8． Other menu options do not do change The display interface to the END option, press ENTER to return control window. Pressure settings: Preheated for 5 minutes after boot, anesthesia machine work for the state, anesthesia ventilator control panel DIP switch S1, 4,3,2 segment is set to on, 1 is set to off, then anesthesia ventilator tidal volume window adjusted value for  the pressure, the digital pressure gauge to the pressure sampling port, debug as follows: 1)

To the pressure sampling port on the air, anesthesia ventilator display 2.00 ~ 2.02, or adjust control panel

 potentiometer R4;

2)

Measurement of the container through the sampling port pressure to 7kPa, anesthesia ventilator showed a value of 

8.98 ~ 9.02, or adjust control panel board potentiometer R3; Repeatedly adjust R3, R4, to meet the requirements of airway pressure display. Adjustment is completed, the control panel DIP switch S1 of a segment set to on.

3） Fault: Tidal volume are not accurate (gas line problem need to exclusion before electrical test) as a pressure sensor, two pressure sampling tubes often stagnant water, pressure will affect the transmission of tidal volume are not accurate, so first check whether the sampling tube does have water, and clear it.

Analysis carried out

after confirmation. Three problems lead the Tidal volume not accurate: 1) pressure sensor failure; 2) the proportional valve controllers problem; 3) The proportional valve is not working properly; Pressure sensor test:

 N12 After the boot to be working properly, measuring 3 feet N12 voltage, consistent with Table 1, differential pressure sensor to determine the normal sampling:

 

（ml）

No.

TV

Voltage（max）

1

250

2.53

2

350

2.71

3

500

2.87

4

650

2.95

5

800

3.04

6

1000

3.14

Table 1 Proportional Valve Controller Detection:

Output current value Measure input voltage Start working properly, set the different tidal volume, simultaneous detection of the input voltage proportional valve controller, the controller shows the current value of observation, compared with, if found in the following table (Table 2), the control panel (A1) and proportional valve is working properly.  

No.

TV

Input Voltage

Current mA

1

250

1.58

298

2

350

1.84

305

3

500

2.21

316

4

650

2.56

327

5

800

2.95

338

6

1000

3.55

355

Table 2 2.

Black screen, black screen of Death; Check the back of LCD panels before and after the 220V inverter and +12 V, power supply socket X1 PC board situation.

3.

membrane board key failure: First test the use of all buttons, the screen is normal operation; further determined that under fault phenomenon mask the problem, the PC and control board failures. PC board controls: buttons, "home screen", "menu", "confirm", "▲", "▼", "STBY", "Mute 2min", "reset." All screen display. Control Panel Control: Key "PVC", "VCV", "suction pressure", "smoking calls more than", "respiratory rate", "tidal volume", "confirm." By checking the LED display X2, X4, X1 socket, to confirm cause of the malfunction.