Weinmann WM 28000 Service Manual

Page 1
MEDUMAT Easy
Ventilator
WM 28000
Page 2
Contents
Introduction
1.
Overview
1.1
2.
Description
2.1
2.2
2.3
2.4
2.5
3.
Final check
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
3.10
3.11
3.12
3.13
3.14
3.15
3.16
3.17
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Special symbols on the ventilator
. . . . . . . . . . . . . . . . . . . . . . . . . .
Uses
. . . . . . . . . . . . . . . . . . . . . . . . .
Ventilation function Demandflow function Patient valve Audio response
. . . . . . . . . . . . . . . . . . . . . . . . . .
Testing equipment required Preparing for final check Entering the device data Testing for leaks and pressure reading Self-test when device is switched on Functional check on controls
(button check) Functional test and alarms Battery power Test pressure sensors Functional check on frequency setting Functional check
at 4.5 bar input pressure and 10 mbar back pressure
Checking O2 concentration Functional check on pressure limit Functional check on relief valve
without patient valve Checking the type plate data Check on external condition Documentation
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breath volume
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10 10 11 12
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3
4
5
6
6 6 7 7 7
8
8 8 8 9 9
9
4.
Servicing
4.1
4.2
4.3
5.
Troubleshooting
6.
Repair information and instructions
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
6.10
6.11
6.12
6.13
7.
Spare parts
7.1
7.2
8.
Tools and Test Equipment
8.1
8.2
8.3 Testing equipment. . . . . . . . . . . . . . . 39
9. Technical data . . . . . . . . . . . . . . . . . . . . . . . 40
9.1 Pneumatic / electronic systems . . . . . . 41
10. Technical Changes . . . . . . . . . . . . . . . . . . . 42
11. Repair and service records . . . . . . . . . . . . . . 43
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Intervals and scope Batteries Storage
General Changing the filter in the pressurised
gas connection Opening the device Closing the device Replacing button cell Changing the speaker Changing the board Replacing the pneumatic block Replacing the 3/2-way magnetic valve 29 Calibrating the potentiometer
(after changing pneumatic block including potentiometer)
Changing upper part of housing Changing the fascia film Changing lower part of housing
Spare parts list Service sets
General tools Special tools
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30 31 32 33
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35 37
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38 38
© Copyright WEINMANN GmbH & Co. KG. The content and presentation are copyright protected and may only be used by authorised WEINMANN Service Partners in the course of their service operations. The content must not be reproduced or passed on to third parties. The complete documents must be returned on termination of the cooperation with WEINMANN.
2
Page 3

Introduction

For decades WEINMANN has been developing, manufacturing and marketing devices for emergen­cy medical care, oxygen therapy and inhalation therapy.
In 1972 WEINMANN put the first MEDUMAT emergency respirator on the market.
MEDUMAT emergency respirators are automatic respirators. They are used for controlled respiration in emergency medical care, e.g. in cases of acute respiratory disorders, and also secondary obstruc­tions.
The new generation of devices, developed specif­ically to meet users’ requirements and put on the market in 1997, offers users and patients in­creased security. An intelligent alarm system moni­tors the patient’s breathing and informs the user about any problems that occur. These devices thus offer even greater security and reliability during respiration.
The aim of these servicing and repair instructions is to familiarise you, as an expert in the field, with the function, technology, servicing and repair of the
MEDUMAT respirator. Thanks to training which you have already received from WEINMANN, you now count as “trained expert personnel” and can there­fore give your customers appropriate instructions, remedy problems on your own and perform the functional checks prescribed in the operating instruc­tions and any repairs required in accordance with these Service and Repair Instructions.
In the event of a warranty claim, send the MEDUMAT to WEINMANN.
To enable us to process ex gratia requests or war­ranty claims, please enclose the customer’s proof of purchase (invoice) with the device.
Repairs or servicing work may be performed only by WEINMANN or by trained specialist staff.
You are responsible for repairs carried out yourself and for their warranty!
Use only original WEINMANN spares for repairs.
Please bear in mind: Your customer trusts you and relies on your expert capability, just as you rely on WEINMANN.
Note:
For the following information, please consult the Operating Instructions for MEDUMAT:
Safety Information
Fitting accessories
Operating MEDUMAT emergency respirators
Hygienic preparation
Functional check
Introduction 3
Page 4

1. Overview

Control panel MEDUMAT Easy
1 Mask/tube ventilation
switch with indicator LEDs
2 Respiratory pressure
indicator (bar graph)
60
mbar
50
40
30
20
10
0
11
9
10
7
11
16
5
30
3
MV (l/min)
Stenosis Disconnection < 2,7 bar O
12
10
12
Freq.(min
3 Alarm panel
MEDUMAT Easy
2
14
15
13
14
16
Demand­flow
-1
)
4 Alarm confirmation
5 Colour code
6 Adjuster knob, ventilation parameters
7 Index position
8 LED Demandflow
9 ON/OFF switch
Connections MEDUMAT Easy
r
a
b
10 Pressurized gas
connection
15 Relief outlet valve
m
60
50
40
30
20
11
10
10
9
0
10
11
7
16
30
5
eq.(
r
F
3
l/min
(
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11 Battery compartment
12 Speaker
13 Pressure gauge hose
connection
14 Ventilation hose connection
4 Overview
Page 5

1.1 Special symbols on the ventilator

Symbols on MEDUMAT Easy
Typ :
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M
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50
40
30
20
12
11
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14
12
10
9
15
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Inlet 2,7 - 6 bar O2.
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9
5
1
0
0
3
1
1
6
1
4
1
1
1
7
6
1
30
5
3
SN
MEDUMAT Easy device information plate
Serial number of device
Year of manufacture
Do not dispose of device in domestic waste.
Safety check and servicing label
Servicing label: indicates when the next service is due.
Safety check label: (in Germany only) marks when the next safety check as per §6 of the German law relating to users of medical devices is required.
Overview 5
Page 6

2. Description

2.1 Uses

MEDUMAT Easy is an automatic oxygen respiration device (short-term ventilator) with additional inhalation facility.
You can use MEDUMAT Easy:
to revive patients at the site of the emergency;
for longer periods in more protracted emergencies, e.g. fires;
for short-term O2 inhalation using a respiration mask.
You can use MEDUMAT Easy while transporting patients:
between the various rooms and departments of a hospital;
between the hospital and other premises;

2.2 Ventilation function

MEDUMAT Easy operates within a pressure range of 2.7 to 6 bar and at a flow rate of not less than 70 l/min O2. It has a built-in power supply.
It uses high-pressure, medicinal-grade oxygen. An external pressure reducer brings this down to the required operating pressure. The oxygen supply is fed in at input valve 10.
The ventilation settings are continuously variable. These settings (frequency and volume per minute are coupled) and the inspiration/expiration ratio of 1:1.67 are regulated by internal electronic control mechanisms.
in emergencies;
when transport over considerable distances is planned.
MEDUMAT Easy:
is designed to provide controlled ventilation to persons of 10 kg body weight or more;
is used to treat respiratory arrest;
can be preset to parameters that ensure evenly balanced ventilation, provided that the selected maximum ventilation pressure P
max
is
not exceeded;
permits breathing-controlled oxygen inhalation in Demand mode.
MEDUMAT Easy
Stenosis
r
a
b
m
Disconnection
2
60
10
< 2,7 bar O
50
40
30
20
12
11
10
14
12
10
9
15
0
10
13
16
14
11
7
Demand-
w
16
flo
30
5
-1
)
q.(min
Fre
3
MV (l/min)
The gas for inspiration flows along the hose and through the patient valve and either the mask or tube into the patient’s airways. The patient valve is fitted with a lip membrane that enables expired gas to be conducted away through the expiration tube.
6 Description
Page 7
You can check the course of ventilation on the
10
respiration pressure indicator 2.

2.3 Demandflow function

mbar
60
50
2
40
30
20
10
9
0
The Demandflow setting switches the MEDUMAT Easy to breathing-controlled O2 inhalation. Such inhalation must be carried out with the respiration mask. A small inspiration (trigger) pulse causes oxygen to continue flowing until slight overpressure interrupts the flow. Expiration then takes place via the patient valve as in ventilation.

2.4 Patient valve

The gas for inspiration is channelled into the patient’s airways through the patient valve.
The valve is designed to enable spontaneous breathing in the event of failure of the MEDUMAT Easy.
0
Demandflow setting
12
11
9
10
10
7
11
16
5
30
3
Freq.(min
MV (l/min)
12
14
15
13
14
16
Demand­flow
-1
)
38
37
39
40 34 35 36 41

2.5 Audio response

The device has an audio response facility that can be switched on for user guidance, especially for users who have little practice.
If audio guidance is not wanted, it can be switched off by pressing a combination of keys (see “4.10 Audio response for user guidance” in the operating instructions).
Description 7
Page 8

3. Final check

After every repair and every service, the device must be subjected to the following final check in accordance with Test Instructions WM 28001 and the test record.
Note:
For the final check on the MEDUMAT Easy you must connect the ventilation hose and the patient valve to the device.
MEDUMAT Easy must not be used if the final check reveals defects or deviations from the specified parameters.
We recommend that you always hold reserve stocks of the following items:
replacement washers for the connections;
lip membrane for the patient valve.
membrane for spontaneous breathing tube;
membrane for exhalation tube;
O-ring 1145/118.

3.1 Testing equipment required

Volume flow meter, Type RT 200 (Timeter), Type EKU VIP – ventilator, PF 300 Imtmedical or comparable test device
Adjustable orifice, e.g. ball valve, internal diameter 10 mm
Test set for functional checks WM 15323
Oxygen concentration meter, 0 – 100% ± 1%, e.g. Type Oxycontrol WM 13550
Set, hose with syringe WM 15359
Pressure gauge 0 - 6.3 bar, class 1.6
Pressure gauge 0 -100 mbar, class 1.6
Set, supply test Medumat / Modules WM 15440

3.2 Preparing for final check

1. Connect MEDUMAT Easy to the 4.5 - 6 bar pressure supply.
2. Connect ventilation hose and pressure measurement tube to MEDUMAT Easy.
3. Device setting: Freq. = 30 min-1, MV = 3 l/min.
4. Language setting “English”.

3.3 Entering the device data

Enter the device number and the tester number in the test record.
8 Final check
Page 9

3.4 Testing for leaks and pressure reading

3.4.1 Checking input side for leaks

With the device switched off, apply 6 bar pressure to input side and and shut off output pressure.
Requirement: The pressure drop must be less than 0.2 bar/min.

3.4.2 Checking pressure measurement zone for leaks

Apply 55 mbar ± 2 mbar to MEDUMAT pressure measurement zone.
Requirement: The pressure drop must be
2 mbar/min.
Respiration
T
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D
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M
sy
Ea
s i s
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t
n
S
o i t
c
e n n
o
c
r
s
a
i
b
D
m
2
0
6
< 2,7 bar O
0
5
0
4
30
0
2
2
1 1
1
0
4
1
1
2
1
0
1
9
15
0
0
3
1
1
6
1
4
1 1
1
7
16
30
5
3
Test pressure gauge
13
pressure indicator
Syringe

3.5 Self-test when device is switched on

If audio response is enabled, you will hear the sentence “Open oxygen cylinder” before the self-test starts.
1. Apply 4.5 bar to the input.
2. Switch on MEDUMAT Easy at button 9.
Requirement: The self-test starts, the ventilation mode LEDs light up once each one after the other, the alarm
LEDs flash, the pressure indicator LEDs are run through 3 times, a signal tone sounds and an audio response sentence is spoken.

3.6 Functional check on controls (button check)

1. Open the pressure supply.
2. Switch on the device.
3. Switch from mask ventilation to tube ventilation.
4. Press the alarm acknowledgement button.
Final check 9
Page 10

3.7 Functional test and alarms

3.7.1 Test Stenosis alarm

Switch to tube ventilation ( ) and close patient valve outlet.
Operate device at Freq. setting = 30 min-1 and MV = 3 l/min.
Requirement: The Stenosis alarm must be triggered after two ventilation cycles. If audio response is
enabled, the ventilator announces “Check airways and minute volume”.

3.7.2 Checking alarm confirmation

Immediately after the first alarm tone sounds, press Alarm confirmation button 4.
Requirement: The alarm tone must be suppressed immediately.

3.7.3 Test Disconnection alarm

Open patient valve outlet.
Requirement: The Disconnection alarm must be triggered after two ventilation cycles. If audio response
is enabled, the ventilator announces “Check ventilation system and settings”.

3.7.4 Test Pressure alarm

Shut off pressurised gas connection of MEDUMAT (2.7 - 6.0 bar).
Requirement: The Pressure alarm must be triggered. If audio response is enabled, the ventilator
announces “Check pressure hose system and gas supply”.

3.7.5 Checking Demand mode LED

Open the pressure supply.
Requirement: Demand mode LED must come on (flickering).

3.7.6 Check voice output

3.8 Battery power

3.8.1 3.0 V battery (on board)

Since the 3.0 V lithium cell is difficult to access, its charge status can be checked both via the interface and in a relevant menu.
To do so, hold down the alarm confirmation button while switching the device on. The device is then in battery check mode for 3 seconds, before switching to normal operating mode.
During this 3-second period the “Power supply” alarm in the alarm panel lights up and the voltage measured for the lithium cell is shown on the pressure bar graph.
The adjacent table shows how the voltage readings correspond to the bar graph values.
Bar graph value (mbar) Battery voltage (V)
60 3.21
55 3.19
50 3.17
45 3.15
40 3.13
35 3.11
30 3.09
25 3.07
20 3.05
15 3.03
10 3.01
5 2.99
0 2.97
10 Final check
Page 11
Requirement: Voltage measured for 3.0 V battery is in the range 3.0 to 3.2 V; the alarm for this cell is
triggered at 2.7 V.

3.8.2 3.6 V battery (battery compartment)

Remove the 3.6 V battery from the battery compartment and measure the voltage with a digital multimeter.
Requirement: Voltage measured for 3.6 V battery is in the range 3.4 to 3.7 V.

3.9 Test pressure sensors

3.9.1 Input pressure sensor

Shut off pressurised gas connection of MEDUMAT (2.7 - 6.0 bar).
Requirement: The Pressure alarm must be triggered. If audio response is enabled, the ventilator
announces “Check pressure hose system and gas supply”.

3.9.2 Ventilation pressure sensor

Connect ventilation hose to test bag.
Run device with settings: Freq. = 10 min-1 and MV = 11 l/min.
Switch device to mask ventilation.
Requirement: The pressure limit must respond at 20 ± 5 mbar.
Switch device to tube ventilation.
Requirement: The pressure limit must respond at 45 ± 5 mbar.

3.9.3 Demand flow sensor

1. Supply device with pressure.
2. Switch on MEDUMAT Easy at button 9.
3. Connect ventilation tube and patient valve to test bag.
4. Set MEDUMAT Easy to demand flow mode.
5. Green LED in demand mode button illuminates.
6. Squeeze the test bag.
Requirement: Releasing the test bag triggers a short ventilation.
Final check 11
Page 12

3.10 Functional check on frequency setting

T
A
M
U
D
E
M
y
s
a
E
Stenosis
tion c
r a
b
Disconne
m
O
2
r
60
,7 ba 2 <
50
40
30
20
12
11
10
14
12
0
1
9
5
1
0
0
3
1
1
6
1
14
11
7
16
0
3
5
3
Patient valve with hose system
Volume flow meter
Orifice 10 mbar
open
Connect ventilation hose to 10 mbar orifice and to volume flow meter.
Run device with settings: Freq. = 14 min-1 and MV = 16 l/min.
Requirement: The frequency must be 14 ± 2 min
-1
.
Run device with settings: Freq. = 10 min-1 and MV = 11 l/min.
Requirement: The frequency must be 10 ± 2 min
-1
.
Run device with settings: Freq. = 30 min-1 and MV = 3 l/min.
Requirement: The frequency must be 30 ± 2 min
-1
.

3.11 Functional check breath volume at 4.5 bar input pressure and 10 mbar back pressure

T
A
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D
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M
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s
a
E
is
s o n
te
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io
t c e
n n o
c
is
bar
D
m
O
2
r
0
a
6
b 7
, 2
<
0
5
0
4
0
3
0
2
2
1
1
1
0
4
1
1
2
1
0
1
9
5
1
0
0
3
1
1
6
1
4
1
1
1
7
6
1
0
3
5
3
Patient valve with hose system
Volume flow meter
Orifice at 10 mbar
setting
Run device with settings: Freq. = 14 min-1 and MV = 16 l/min.
Requirement: Breath volume must be 1140 ± 170 ml.
Run device with settings: Freq. = 10 min-1 and MV = 11 l/min.
Requirement: Breath volume must be 1100 ± 170 ml.
Run device with settings: Freq. = 30 min-1 and MV = 3 l/min.
Requirement: Breath volume must be 100 ± 20 ml.
12 Final check
Page 13

3.12 Checking O2 concentration

Run device with settings: Freq. = 10 min-1, MV = 11 l/min and 100% O2.
Requirement: The O
concentration must be > 98%.
2

3.13 Functional check on pressure limit

Connect ventilation hose to test bag.
Run device with settings: Freq. = 10 min-1 and MV = 11 l/min.
Switch device to mask ventilation.
Requirement: The pressure limit must respond at 20 ± 5 mbar.
Switch device to tube ventilation.
Requirement: The pressure limit must respond at 45 ± 5 mbar.

3.14 Functional check on relief valve without patient valve

Run device with settings: Freq. = 11min-1 and MV = 7 l/min.
Switch ventilation hose to test bag.
Requirement: The test bag is fully inflated during the inspiration stroke. The ventilator is then heard to
release pressure.

3.15 Checking the type plate data

Check type plate data against drawing.
Requirement: The type plate data must be correctly entered in accordance with the drawing.
Final check 13
Page 14

3.16 Check on external condition

Check external condition.
Requirements: The outside of the device is not scratched and there are no flaws.
The connection thread is undamaged and screws easily.
The adjuster knob is secured by self-locking against inadvertent changes.
Elbow outlet turns easily.

3.17 Documentation

Document items 3.3 to 3.16, and also test date and tester number, in the test record.
14 Final check
Page 15

4. Servicing

Note: Remember to perform a final check after every repair.
We recommend that maintenance work such as inspections and repairs be performed only by the manufacturer, i.e WEINMANN, or by qualified technicians expressly authorized by WEINMANN.

4.1 Intervals and scope

Every 2 years:
Every 2 years the device (incl. patient valve and hose system) must undergo servicing and be subjected to a
safety check as specified below.
You can also have servicing and the safety check performed by WEINMANN.
Be sure to check the following items:
Check equipment for completeness;
Visual check:
– Mechanical damage – Labelling of controls – Damage to all external hoses;
Renew parts subject to wear / parts requiring compulsory replacement (see “7.2 Service sets” on page 37);
Check system components: carrying platforms, oxygen fittings, secretion suction system, hose connections etc.;
Check test bag;
Final check in accordance with Test Instructions/ Test Record STK WM 28001 (see “3. Final check” on page 8 and see “11. Repair and service records” on page 43).
Every 4 years:
Servicing of the fittings in the oxygen supply system (e.g. pressure reducer) either by the manufacturer or by a specialist expressly authorized by the manufacturer.
Every 10 years:
Repeat testing of conventional steel or aluminium oxygen cylinders by the responsible testing organisation. The repeat testing date is stamped on the shoulder of the cylinder.
Servicing 15
Page 16

4.2 Batteries

MEDUMAT Easy is equipped with two batteries. The main battery 18 must always be changed. The button cell 17 (CR2430) only has to be replaced every 4 years.
The button cell 17 supplies auxiliary power to the electronic system if the main battery 18 fails. This makes it possible to set off an alarm even if the main battery suddenly fails. The device then switches to exhalation.
In principle, the battery capacity is designed so that under normal conditions of use, it will not need changing in the 2 years between services. The main battery 18 is to be renewed during the 2­yearly service, the button cell 17 only every 4 years.
17
60
MEDUMAT
m
b
a
r
Easy
S
te
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os
50
is D
isco
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2
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ba
40
r
O
2
30
20
10
11
12
0
9
10
10
12
14
7
11
15
13
14
16
16
5
30
D
em
an
d
-
3
flow
Freq
.(
m
-
1
in
)
M
V
(
l/m
i
n
)
42
18
When changing batteries, special precautions must be taken to protect the electronic circuits (see “6.5 Replacing button cell” on page 24).
17: Button cell for back-up power 18: Lithium battery 3.6 V for main power
supply MEDUMAT Easy
When changing the main battery 18, you must change the O-ring 42 on the battery compartment cover as well.

4.3 Storage

If you do not intend to use MEDUMAT Easy for a long period, we recommend the following storage precautions:
1. Clean and disinfect the device (see “5. Hygienic Preparation” in the operating instructions).
2. Store MEDUMAT Easy in a dry place.
Important
Remember that devices still require servicing at the specified intervals even when in storage, otherwise they are not allowed to be used when removed from storage.
16 Servicing
Page 17

5. Troubleshooting

Fault Cause Remedy
A battery is exhausted
Fuse defective Change board (6.7, page 26)
MEDUMAT Easy does not start up when switched on
MEDUMAT Easy will not switch off
MEDUMAT Easy is functioning, but without any displays
MV too high
MV not correct
Ribbon cable X100 of fascia film is faulty or not connected
On/Off button 9 defective Change fascia film (6.12, page 32)
Board defective Change board (6.7, page 26)
Magnetic valve defective
Operating error
On/Off button 9 defective Change fascia film (6.12, page 32)
Pressure gauge hose on MEDUMAT Easy or on patient valve has slipped off
Kink in pressure gauge hose
Pressure gauge hose within device is kinked or has slipped off
Measured without 10 mbar back pressure
Measuring device not calibrated Calibrate measuring device
Input pressure > 6 bar
Patient valve not in order
Potentiometer wrongly adjusted
Adjuster knob out of adjustment
Pneumatic block leaking
Change main battery 18 (4.2, page 16), check button cell 17 (3.8.1, page 10) and replace if necessary (4.2, page 16)
Check plug-in connection and cable (6.7, page 26)
If necessary, replace upper part of housing (6.11, page 31)
Change magnetic valve (6.9, page 29)
Keep On/Off button 9 pressed for at least 2 seconds
Check pressure gauge hose
Set to 10 mbar back pressure
Reduce system setting to less than 6 bar
Check membranes and O-ring, replace if necessary (Chapter 6.7 of operating instructions)
Readjust potentiometer (6.10, page 30)
Readjust adjuster knob (6.10, page 30)
Replace pneumatic block (6.8, page 27)
Troubleshooting 17
Page 18
Fault Cause Remedy
+–
Incorrect setting selected on device
Make correct setting (Chapter 6.5 of operating instructions)
Check membranes and O-ring,
Patient valve not in order
replace if necessary (Chapter 6.7 of operating instructions)
Pressure limit (P
max
) not in
Patient valve or test bag not correctly connected
MV not in order See fault “MV not in order”
Check hose connections and test bag
order
Hose connections in device not in order
Check hoses, replace if necessary (6.8, page 27)
Pressure sensor on board is faulty Change board (6.7, page 26)
Adjuster knob for ventilation defective
Pressure measurement connection blocked
Replace adjuster knob (6.3, page 21 and 6.4, page 22)
Replace (6.8, page 27)
LED’s do not light up Change board (6.7, page 26)
Alarms (visual + acoustic) not in order
Incorrect indication (Stenosis/ Disconnection)
Check settings, check hose connection to patient valve (Chapter
6.7 of operating instructions)
No (visual + acoustic) alarm Board defective Change board (6.7, page 26)
Alarm confirmation pressed? Wait for between 30 – 120 s
No acoustic alarm
Speaker defective Replace speaker (6.6, page 25)
Pressure sensor defective Change board (6.7, page 26)
Alarm < 2.7 bar although pressure present
Hose connections in device not in order
Check hoses, replace if necessary (6.8, page 27)
Change main battery 18 (4.2,
alarm. Battery failing
page 16), check button cell 17 (3.8.1, page 10) and replace if necessary (4.2, page 16)
Pressure inlet leaking
Hose system in device is leaking
Pressure sensor on board is leaking
Angled connector in device is loose or defective
Check (6.8, page 27)
Check hoses, replace if necessary (6.8, page 27)
Change board (6.7, page 26)
Mask/tube switch 1 defective Change fascia film (6.12, page 32)
Pneumatic block leaking
Potentiometer wrongly adjusted
Replace pneumatic block (6.8, page 27)
Adjust potentiometer (6.10, page 30)
Frequencies not in order
Replace pneumatic block (6.8, page 27)
Test bag is not filled sufficiently during functional check, Disconnection alarm
Potentiometer defective
Ventilation parameters incorrectly set Correct ventilation parameters
Patient valve not working properly Check lip membrane
Pressure measurement tube not fitted Fit pressure measurement tube
18 Troubleshooting
Page 19
Fault Cause Remedy
No Stenosis alarm when patient valve closed during functional check (see “Checking the breath volume” in the operating instructions)
Patient valve not working properly Check lip membrane
Troubleshooting 19
Page 20

6. Repair information and instructions

6.1 General

Always perform repairs to MEDUMAT Easy at an ESD-protected workplace.
Observe the safety information in the Operating Instructions for MEDUMAT Easy.
All operations on this device require detailed knowledge and observation of the Operating Instructions and the Service and Repair Instructions.
Do not carry out any repairs that are not described in these Service and Repair Instructions. This is the only way to guarantee trouble-free functioning of MEDUMAT Easy.
Make sure that your hands and workplace are clean during the repair work.
Be sure to carry out a final check after every repair (see “3. Final check” on page 8).
If you replace components or individual parts, use only genuine WEINMANN parts.
When ordering the lower part of the housing 24, please specify device type, year of manufacture and device number.
Note: The item numbers quoted in the following text are identical to the item numbers in the spare parts list on Page 35 and the overview on Page 4.

6.2 Changing the filter in the pressurised gas connection

Tools and equipment required
Flat-head screwdriver
Tweezers.
1. Unscrew the slot-head screw from the pressurised gas connection 10.
2. Use tweezers to remove filter set 57.
3. Carefully insert a new filter set 57 in the pressurised gas connection.
4. Screw the slot-head screw firmly into the pressurised gas connection.
57
20 Repair information and instructions
Page 21

6.3 Opening the device

12
11
Tools and equipment required
ESD-protected workplace,
Phillips screwdriver, size 1,
Tubular hexagon box spanner 10 mm,
Special tool WM 22829 from special tool set WM 15349,
Flat-nose pliers.
1. Open the battery compartment with a coin and remove the battery.
60
M
E
D
U
M
m
b
A
a
r
T
E
a
s
y
S
te
no
50
s
is D
is
c
o
n
n
e
c
tio
n
<
2
,7
b
40
a
r
O
2
30
20
10
11
12
0
9
10
10
12
14
7
11
15
13
14
16
16
5
30
D
e
m
a
n
d
-
3
flo
F
r
w
e
q
.(
m
­1
in
)
M
V
(
l/m
in
)
2. Lift off the lid 32.
3. Hold the adjuster knob 33 still with the special tool and loosen the nut with a tubular hexagon socket spanner (10 mm).
Do not unscrew the nut completely – only loosen it. Otherwise the knob will split into its separate parts.
4. Pull off the adjuster knob 33.
5. Place the device on a non-slip surface and unscrew the 4 screws 43 from the rear of the device.
6. Place the device on its side and carefully pull the two parts of the housing apart until the locating pin of the adjuster knob is pulled completely out of the upper part of the housing 20.
7. Remove the speaker 12 from the lower part of the housing 24 and disconnect it.
10
0
7
5
14
12
10
9
15
10
13
16
14
11
16
Demand- flow
30
-1
)
q.(min
Fre
3
33
32
MV (l/min)
43
24
43
60
M
E
D
U
M
m
b
A
a
r
T
E
a
s
y
Stenosis
50
Disconnection < 2,7 bar O
40
2
30
20
10
11
12
0
9
10
10
12
14
7
11
15
13
14
16
16
5
30
Demand-
3
flow
Freq.(
min
­1
)
MV (
l/m
in)
24
12
20
Repair information and instructions 21
Page 22
8. Disconnect the plug of wiring harness 51 from the board.
Note:
This is best done with flat-nose pliers. Be very careful not to damage the board with the pliers.
9. Unscrew the blue sensor tube 53 from the pneumatic block.
Note: Do NOT pull sensor tube 53 off the pressure sensor on the board, as this will damage the sensor.
10. Pull the ends of the Y-shaped sensor tube 54 off the sensors on the board.
11. Flap the two parts of the housing apart and place them with the outside downwards.
12. Unscrew screw 47 with the serrated washer 48 from the earth connection to the pneumatic block.
13. Unscrew the two screws 46 with the spring washers 45 and remove the battery contacts from the battery compartment.
The two halves of the housing are now separated.
Earth connection
53 5154 47
46
45
48

6.4 Closing the device

Tools and equipment required
ESD-protected workplace,
Torque spanner 50 ±5 Ncm,
Torque spanner 200 ±10 Ncm,
Tubular hexagon box spanner 10 mm,
Special tool WM 22829 from special tool set WM 15349,
Allen key SW 2.5.
1. Place the two parts of the housing side by side with the outside facing downwards.
2. Place the battery contacts in the battery compartment and screw them in place with the two screws 46 and the spring washers 45.
46
45
22 Repair information and instructions
Page 23
3. Push the ends of the Y-shaped sensor tube 54
12
11
onto the sensors on the board.
4. Screw the blue sensor tube 53 onto the pneumatic block.
5. Connect the plug of wiring harness 51 to the board.
6. Attach the earth connection to the pneumatic block using screw 47 and serrated washer 48.
Earth connection
7. Connect up the speaker 12 and insert it in the recess in the lower part of the housing 24. The centering lug of the speaker must be located in the corresponding groove in the lower part of the housing.
8. Push the adjuster knob locating pin through the hole in the board and put the two halves together.
9. Insert the battery in the battery compartment and close the lid with a coin. Make sure the battery is correctly connected.
10. Now screw up the lower part of the housing with the 4 screws 43 using a torque of 50 ±5 Ncm.
53 5154 47
60
M
E
D
U
M
m
b
A
a
r
T
E
a
s
y
Stenosis
50
Disconnection < 2,7 bar O
40
2
30
20
10
11
12
0
9
10
10
12
14
7
11
15
13
14
16
16
5
30
Demand-
3
flow
Freq.(
min
­1
)
MV (
l/m
in)
48
24
Centering lug
1220
60
M
E
D
U
M
m
b
A
a
r
T
E
a
s
y
S
te
n
o
50
s
is D
is
c
o
n
n
e
c
tio
n
<
2
,7
b
40
a
r
O
2
30
20
10
11
12
0
9
10
10
12
14
7
11
15
13
14
16
16
5
30
D
e
m
a
n
d
-
3
flo
F
r
w
e
q
.(m
­1
in
)
M
V
(
l/m
in
)
11. Secure the adjuster knob 33:
– Push the adjuster knob onto the spindle as
far as it will go, then pull it out a fraction.
– Hold the knob firm with the special tool and
screw it tight with a torque of 200 ±10 Ncm.
43
24
43
10
0
7
5
14
12
10
9
15
10
13
16
14
11
16
30
Fre
3
q.(min
and-
Dem flow
-1
)
33
32
MV (l/min)
Repair information and instructions 23
Page 24
12. Check the alignment of the adjuster knob. When the knob is turned fully to the left, the white line must point to MV: 3 l/min. If it does not, slacken the nut and realign the adjuster knob.
13. Place the cap 32 on the adjuster knob 33.
14. Perform the final check (see “3. Final check” on page 8).

6.5 Replacing button cell

Tools and equipment required
ESD-protected workplace,
Phillips screwdriver, size 1,
Tubular hexagon box spanner 10 mm,
Torque spanner 50 ±5 Ncm,
Torque spanner 200 ±10 Ncm,
Special tool WM 22829 from special tool set WM 15349,
Flat-nose pliers.
1. Open the device (see “6.3 Opening the device” on page 21).
2. Release the ribbon cable from its clamp X100: To do so, lift up the top part of the clamp. Then you can pull out the cable.
3. Unscrew the two screws 49 and remove the board 21 from the upper part of the housing.
4. To remove the button cell 17, use a match or similar to ease it slightly out of the holder and pull the button cell out sideways with the other hand.
Caution!
Do not use sharp or pointed objects for this purpose, as this could damage the board.
5. Insert a new button cell 17.
Make sure it is installed the right way round.
X100
Push here
49 21
49
17
24 Repair information and instructions
Page 25
6. Insert the board 21 in the upper part of the housing.
Make sure that the ribbon cable is not under the board or jammed between it and the housing.
49 21
7. Attach the board 21 with the two screws 49.
8. Place the ribbon cable in the clamp X100 on the board and then press down the top part of the clamp.
X100
49
9. Close the device (see “6.4 Closing the device” on page 22). Use a new main battery 18.
10. Perform a final check (see “3. Final check” on page 8).
Please remember that old batteries must not be disposed of in household waste. Always take old batteries to a local collection point.

6.6 Changing the speaker

Tools and equipment required
ESD-protected workplace,
Phillips screwdriver, size 1,
Tubular hexagon box spanner 10 mm,
Torque spanner 50 ±5 Ncm,
Torque spanner 200 ±10 Ncm,
Special tool WM 22829 from special tool set WM 15349.
1. Open the device (see „6.3 Opening the device“ on page 21, steps 1. to 6.).
2. Remove the speaker 12 from the lower part of the housing 24 and disconnect the speaker cable plugs. Put the old speaker on one side.
3. Take the new speaker 12 and connect the speaker cable plugs.
4. Insert the speaker 12 in the recess in the lower
60
50
40
30
20
10
0
part of the housing 24. The centering lug of the speaker must be located in the corresponding groove in the lower part of the housing.
5. Close the device (see „6.4 Closing the device“ on page 22, steps 8. to 13.).
6. Perform the final check (see “3. Final check” on page 8).
M
E
D
U
M
m
b
A
a
r
T
E
a
s
y
Stenosis Disconnection < 2,7 bar O
2
24
11
12
9
10
10
12
14
7
11
15
13
14
16
16
5
30
Demand-
3
flow
Freq.(
min
­1
)
MV (
l/m
in)
Centering lug
1220
Repair information and instructions 25
Page 26

6.7 Changing the board

Tools and equipment required:
ESD-protected workplace,
Phillips screwdriver, size 1,
Tubular hexagon box spanner 10 mm,
Torque spanner 50 ±5 Ncm,
Torque spanner 200 ±10 Ncm,
Special tool WM 22829 from special tool set WM 15349,
Flat-nose pliers.
1. Open the device (see “6.3 Opening the device” on page 21).
2. Release the ribbon cable from its clamp X100: To do so, lift up the top part of the clamp. Then you can pull out the cable.
3. Unscrew the two screws 49 and remove the board 21 from the upper part of the housing.
4. Place the new board 21 on the spacers.
Make sure that the ribbon cable is not under the board or jammed between it and the housing.
X100
49 21
49
5. Attach the board 21 with the two screws 49.
6. Place the ribbon cable in the clamp X100 on the board and then press down the top part of the clamp.
7. The screw of the blue sensor tube 53 is secured with a nut for transport. Remove the nut before screwing the tube to the pneumatic block
8. Close the device (see “6.4 Closing the device” on page 22).
9. Perform a final check (see “3. Final check” on page 8).
49 21
53
X100
49
26 Repair information and instructions
Page 27

6.8 Replacing the pneumatic block

Tools and equipment required:
ESD-protected workplace,
Phillips screwdriver, size 2,
Tubular hexagon box spanner 10 mm,
Torque spanner 50 ±5 Ncm,
Torque spanner 200 ±10 Ncm,
Special tool WM 22829 from special tool set WM 15349,
Flat-nose pliers.
1. Open the device (see “6.3 Opening the device” on page 21).
2. Press the catch and unplug the magnetic valve control cable.
3. Unplug the potentiometer cable.
Potentiometer cable
4. Remove the clip 27 from the pneumatic block 22.
5. Pull the elbow connector 26 off the pneumatic block 22.
6. Turn the lower part of the housing over, hold it and the pneumatic block tight and unscrew both screws 44 together with the spring washers 45.
7. Turn the lower part of the housing over again.
8. Press the catch towards the elbow connector and pull the pneumatic block 22 off the tube 56.
When you remove the pneumatic block from the lower part of the housing, the O-ring 28 will fall out of the connection. Make sure that the O-ring 31 does not fall out of the relief outlet valve.
56
Catch
22
Magnetic valve control cable
22
27
26
45 44
28 31
Repair information and instructions 27
Page 28
9. When inserting the new or replacement pneumatic block 22, insert the tube 56 in the elbow connector. Make sure that the cables are routed below the pneumatic block to the right-hand side.
10. Turn the lower part of the housing over, hold it and the pneumatic block tight and screw up both screws 44 with their spring washers 45.
56
45 44
22
Cable
11. Lubricate the O-rings of the elbow connector
26 with a little O
lubricant (WM 14298).
2
Make sure that the compensating hole remains free.
12. Insert the O-ring 28 in the groove in the outlet from the pneumatic block.
13. Insert the elbow connector 26 in the pneumatic block 22.
14. Insert the clip 27 in the pneumatic block 22.
15. Plug in the potentiometer cable.
16. Plug in the magnetic valve control cable.
17. Close the device (see “6.4 Closing the device” on page 22).
18. Perform a final check (see “3. Final check” on page 8).
22
27 28
26
26
Compensating hole
Potentiometer cable
Magnetic valve control cable
28 Repair information and instructions
Page 29

6.9 Replacing the 3/2-way magnetic valve

Tools and equipment required:
ESD-protected workplace,
Phillips screwdriver, size 2,
Phillips screwdriver, size 0,
Tubular hexagon box spanner 10 mm,
Torque spanner 50 ±5 Ncm,
Torque spanner 200 ±10 Ncm,
Special tool WM 22829 from special tool set WM 15349,
Flat-nose pliers.
1. Open the device (see “6.3 Opening the device” on page 21).
2. Remove the pneumatic block (see “6.8 Replacing the pneumatic block” on page 27).
3. Place the pneumatic block on the side with the type plate.
4. Unscrew the two securing screws and remove the 3/2-way magnetic valve 23.
5. Insert the new 3/2-way magnetic valve 23 in the correct position.
Make sure that the seal for the 3/2-way magnetic valve is seated in the correct position.
6. Fasten the 3/2-way magnetic valve with the screws supplied with it.
7. Reinstall the pneumatic block (see “6.8 Replacing the pneumatic block” on page 27).
8. Close the device (see “6.4 Closing the device” on page 22).
9. Perform a final check (see “3. Final check” on page 8).
23
Repair information and instructions 29
Page 30

6.10 Calibrating the potentiometer (after changing pneumatic block including potentiometer)

When the pneumatic block including potentiometer is changed, the potentiometer must be recalibrated for the board.
1. Make sure the device is switched off.
2. Press the On/Off switch 9 and immediately
hold down the alarm confirmation button 4 and the mask/tube ventilation switch 1. Then release the button. After a brief interval, the 30 mbar LED on the bar graph indicator lights up.
3. To set the first calibration value, turn the
adjuster knob 6 fully to the left to the value
MV 3, Freq. 30.
4. Press the mask/tube switch 1. The device now
makes a plausibility check.
– If the value is not correct, all alarm LEDs light
up until the correct value is present at the adjuster knob 6 and has been confirmed with the mask/tube ventilation switch 1. Or you can cancel the potentiometer calibration process by pressing the On/Off switch 9.
– If the value is correct, this is indicated by the
0 mbar LED on the bar graph lighting up. You can now set the next value.
5. Turn the adjuster knob 6 fully to the right to the
white Demandflow zone.
6. Press the mask/tube switch 1. The device
accepts this value The LED on the bar graph lights up, and you can move on to setting the next value.
7. Turn the adjuster knob 6 back beyond the
index point 7 to the ventilation mode zone, then to the right again until it reaches the index point (zone MV 16, Freq. 14 ).
8. Press the mask/tube switch 1 again. The
calibration values are stored and the device exits the calibration mode.
Note:
60
mbar
50
40
30
20
10
0
1 9
11
9
10
7
11
16
5
30
3
MV (l/min)
Stenosis Disconnection < 2,7 bar O
12
10
Freq.(min
MEDUMAT Easy
2
14
12
15
13
14
16
Demand­flow
-1
)
4
6 7
Until the last step the calibration mode can be cancelled at any time by pressing the On/Off switch 9, without storing the new values. If an invalid value is detected during calibration (all alarm LEDs light up), no value is stored either.
30 Repair information and instructions
Page 31

6.11 Changing upper part of housing

Tools and equipment required:
ESD-protected workplace,
Phillips screwdriver, size 2,
Tubular hexagon box spanner 10 mm,
Torque spanner 50 ±5 Ncm,
Torque spanner 200 ±10 Ncm,
Special tool WM 22829 from special tool set WM 15349,
Flat-nose pliers.
1. Open the device (see “6.3 Opening the device” on page 21).
2. Remove the board (see „6.7 Changing the board“ on page 26, steps 2. and 3.).
3. Remove the grommet 52 from the upper part of the housing 20.
You have now removed all the parts. You can start reassembling.
4. Insert the grommet 52 in the new upper part of the housing 20.
5. Refit the board (see „6.7 Changing the board“ on page 26, steps 4. to 6.).
6. Close the device (see “6.4 Closing the device” on page 22).
7. Perform a final check (see “3. Final check” on page 8).
20
52
Repair information and instructions 31
Page 32

6.12 Changing the fascia film

Tools and equipment required:
ESD-protected workplace,
Phillips screwdriver, size 2,
Tubular hexagon box spanner 8 mm,
Tubular hexagon box spanner 10 mm,
Torque spanner 50 ±5 Ncm,
Torque spanner 200 ±10 Ncm,
Special tool WM 22829 from special tool set WM 15349,
Flat-nose pliers.
1. Open the device (see “6.3 Opening the device” on page 21).
2. Remove the board (see „6.7 Changing the board“ on page 26, steps 2. and 3.).
3. Remove the grommet 52 from the upper part of the housing 20.
4. From inside the housing, insert the tubular box spanner through the hole for the grommet 52 and press the fascia film 19 outwards until you can grasp it on one side. Then completely remove the fascia film from the upper part of the housing.
5. Use 70% isopropanol to remove all traces of adhesive from the upper part of the housing. Then wait until the isopropanol has completely evaporated from the housing surface.
You have now removed all the parts. You can start reassembling.
6. Stick the new fascia film 19 to the upper part of the housing:
– First position the fascia film on the upper
part of the housing on the side where the ribbon cable is attached.
– Run the ribbon cable through the slit in the
upper part of the housing.
– Then affix the entire fascia film, taking care
to avoid bubbles.
19
20
19
20
52
6
0
5
0
4
0
3
0
2
0
1
0
0
MEDUMAT Easy
m
b
a
r
S
t
e
n
o
s
is
D
is
c
o
n
n
e
c
t
io
n
<
2
,7
b
a
r
O
2
1
1
1
2
9
1
0
1
1
2
4
1
0
7
1
5
1
1
1
3 1
4
1
6
1
6
5
3
0
D
e
m
a
n
d
-
flow
3
F
re
q
.(m
-1
i
n
)
M
V
(l/min
)
Ribbon cable
32 Repair information and instructions
Page 33
7. Refit the grommet 52 in the upper part of the housing 20.
8. Refit the board (see „6.7 Changing the board“ on page 26, steps 4. to 6.).
9. Close the device (see “6.4 Closing the device” on page 22).
20
52
10. Perform a final check (see “3. Final check” on page 8).

6.13 Changing lower part of housing

Tools and equipment required:
ESD-protected workplace,
Phillips screwdriver, size 2,
Open-ended spanner, 13 mm,
Open-ended spanner, 22 mm,
Torque spanner 50 ±5 Ncm,
Torque spanner 200 ±10 Ncm,
Special counter tool G 3/8 (WM 22827) and special spanner 17 mm (WM 22828) from special tool set WM 15349,
Vice with jaw protectors,
Flat-nose pliers.
1. Open the device (see “6.3 Opening the device” on page 21).
2. Remove the pneumatic block (see „6.8 Replacing the pneumatic block“ on page 27, steps 2. to 8.).
3. Undo the screws 50 and remove the wiring harness 51.
4. Use a pointed object to push the blanking plug
59 of the interface connection out of the lower
part of the housing 24 from inside.
5. Remove the O-ring 31 from the lower part of the housing 24.
50
51
24
59
24
31
Repair information and instructions 33
Page 34
6. Screw the special counter tool onto the pressurised gas connection 10.
7. Clamp the special counter tool in a vice.
10
8. Use a 22-mm open-ended spanner to screw the nut of the special counter tool firmly again the pressurised gas connection.
9. Screw the elbow connector 25 off with a 13-mm open-ended spanner.
10. Use the 17-mm special spanner to slacken the nut 30 and unscrew it completely.
11. Lift out the plate 29.
12. Remove the lower part of the housing 24.
13. Take the new lower part 24 and place it on the pressurised gas connection 10.
14. Slide the plate 29 on the inside of the housing onto the connection.
15. Tighten the 17-mm nut 30 on the inside of the connection.
16. Fasten the elbow connector 25 to the connection.
17. Use the 22-mm open-ended spanner to undo the nut of the special counter tool.
18. Open the vice.
29
30
10
24
25
19. Screw the special counter tool off the pressurised gas connection 10.
20. Using screws 50, screw the interface cable of the wiring harness 51 into the new lower part of the housing 24.
21. Push the blanking plug 59 into the interface connection from outside.
22. Refit the O-ring 31 in the lower part of the housing 24.
23. Reinstall the pneumatic block (see „6.8 Replacing the pneumatic block“ on page 27, steps 9. to 16.).
24. Close the device (see “6.4 Closing the device” on page 22).
25. Perform the final check (see “3. Final check” on page 8).
50
51
31
59
24
34 Repair information and instructions
Page 35

7. Spare parts

7.1 Spare parts list

Note:
The item numbers in the following table are identical to the numbers in the text of these Service and Repair Instructions and in the Operating Instructions.
Item No. Description Order No.
10 Pressurised gas connection (threaded), preassembled WM 22685
12
16 Ventilation hose WM 22647 17
18 19 Fascia film WM 28009
20
Speaker – Seal
– Button cell CR 2430 – Battery 3.6 volt
Upper part of housing with film up to device no. 2279* comprising: – Upper part of housing with film – Label for languages – Label for patient connection Upper part of housing with film from device no. 2280* comprising: – Upper part of housing with film – Rating plate – Label for patient connection
WM 28077 WM 28066
WM 22652 WM 28045
WM 28078
WM 28078
21 PCB, MEDUMAT Easy, exchange WM 28079 22 Pneumatic block, complete, new WM 28025 23 3/2-way magnetic valve WM 28035
Lower part of housing up to device no. 2279* comprising: – Lower part of housing – Rating plate – Label for O2 input – Label for excess pressure valve
24
25 Elbow connector 4/6 WM 22552
26
– Label for battery position Lower part of housing from device no. 2280* comprising: – Lower part of housing – Label for O2 input – Label for languages – Label for excess pressure valve – Label for battery position
Elbow connector ventilation hose, complete – Hose connection for patient valve
WM 28137
WM 28137
WM 28057 WM 3213
Spare parts 35
Page 36
27 28 29 30 31 32 33
34 35 36 37 38 39 40 41
42 43 44
45
46 47 48
Clip for elbow connector
O-ring, elbow connector
Torque plate
Nut for pressure connection
O-ring, pressure relief valve
Cap
Short knob
Patient valve, comprising: –
bottom part of control unit for spontaneous breathing
Membrane for Spontaneous breathing tube
insert for spontaneous breathing tube
top part of control unit
tube connection for patient valve
Lip membrane
Disc membrane Exhalation tube
O-ring 15-1,5
O-ring for battery compartment lid
Fillister head screw 30 x 40 mm for housing
Fillister head screw M3 x 16mm for pneumatic block
Spring washer for fastening pneumatic block and battery contacts
Fillister head screw KB 35 x 8 for battery contacts
Cheese-head screw M3 x 6 for earth connection
Serrated washer for earth connection
WM
WM
WM
WM
WM
WM
WM
WM WM WM WM WM WM WM WM WM
1145/118
WM
WM
WM
WM
WM
WM
WM
28052
1145/141
22509
22586
1145/3
22941
4891
3280 3281 3284 3282 3181 3213 3211 3212
1145/145
58347
53033
50350
58350
50594
51850
49 Fillister head screw KB 30 x 6 for board WM 23159
50
Fillister head screw KB 25 x 6 for interface cable, lower part of housing
WM 58320
51 Cable harness WM 28088 52 Grommet WM 4112 53 Sensor tube, length 65 mm WM 22966
Set, tubes MEDUMAT,
WM 15058
comprising:
54 55 56
– 3x tube, silicone, length 52 mm – Y-connector – Oxygen inlet tube, length 40 mm
WM 28097 WM 28053 WM 28095
Set, filter,
57
comprising: – Filter
WM 15284
– Sealing washer 3.5 x 6 x 0.5
Service label
58
– for servicing in 2 years' time – for servicing in 4 years' time – for servicing in 6 years' time
WM 75340 WM 75341 WM 75339
59 Blanking plug for interface connection, lower part of housing WM 1504
Operating instructions GB, ES, PT WM 16862
*
When placing an order, please make sure to include type, unit serial no. and year built.
36
Spare parts
Page 37

7.2 Service sets

Overview
Years 2 4 6 8 10 12 14 16
Service set
Service set 2, 6, 10 and 14 years
Set, WM 15463 comprising:
WM 15463 WM 15462 WM 15463 WM 15464 WM 15463 WM 15465 WM 15463 WM 15464
Battery
Lip membrane
Membrane for test connector
Membrane for spontaneous breathing tube
Membrane for exhalation tube
Sealing washer 3.5 x 6 x 0.5
Filter
O–ring 15 x 1.5
Service set 4 years
Set, WM 15462 comprising:
Set WM 15463 Button cell
Service 8 and 16 years
Set, WM 15464
comprising:
Set WM 15463
Button cell
Seal for speaker
Set, tubes
Pneumatic block
2x O–ring 11 x 1.5 for elbow outlet
Service 12 years
Set, WM 15465
comprising:
Set WM 15463
Printed circuit board (PCB) MEDUMAT Easy
O-ring 26 x 2 for battery compartment lid
Spare parts 37
Page 38

8. Tools and Test Equipment

This section lists all the tools and test equipment mentioned in these Service and Repair Instructions.
The specific tools and test equipment required in each case are listed in the individual chapter.
You can obtain special tools from WEINMANN.

8.1 General tools

Flat-head screwdriver, size 0.5 x 3 x 100;
Phillips screwdriver, size 0;
Phillips screwdriver, size 1;
Phillips screwdriver, size 2;
Open-ended spanner, 13 mm, for elbow connector at O2 inlet;
Open-ended spanner, 22 mm, for special counter tool;
Vice with jaw protectors, countering threaded connection;
Tubular hexagon box spanner 10 mm, for adjuster knob;
Tubular hexagon box spanner 8 mm, for fascia film;
Tweezers, for filter set;
Diagonal cutter;
Flat-nose pliers;
Allen key, 2.5 mm.
Torque spanner 50 ±5 Ncm;
Torque spanner 200 ±10 Ncm.

8.2 Special tools

The following tools can be obtained from WEINMANN:
Special tool set, comprising: WM 15349
– Special counter tool G 3/8, WM 22827
for countering threaded connection at O2 inlet
– Special spanner, 17 mm, WM 22828
for counter nut at O2 inlet;
– Special tool, WM 22829
for holding securing adjuster knob. – Set, hose with syringe WM 15359 – Special pliers WM 22928
38 Tools and Test Equipment
Page 39

8.3 Testing equipment

Oxygen concentration meter, type Oxycontrol WM 13550
Volume flow meter
Type RT 200 (Timeter)
obtainable from: Allied Healthcare Products Inc. 1720 Sublette Avenue St. Louis, Missouri, MO 63110 USA
Tel.: 001-800-444-3954 Fax: 001-314-771-5183
or
Type EKU VIP ventilator tester
obtainable from: EKU Elektronik GmbH Feldstrasse 9a D-56291 Leiningen Germany
Tel.: 00 49 6746-1018 Fax: 00 49 6746-8484 www.eku-elektronik.de
or
Type Flow Analyser PF-300
obtainable from: SI-special instruments GmbH Strelgasse 2 D-86720 Nördlingen Germany
Tel.: 00 49 90 81/2 20 61 or 2 20 62 Fax: 00 49 90 81/2 20 63 www.specialinstruments.com
www.eku-elektronik.deTest set for final check WM 15323
Set, supply test Medumat/Modules WM 15440
Set, test set respiration and pressure reducer flow WM 15443
Pressure gauge 0 to 6.3 bar, class 1.6;
Pressure gauge 0 – 100 mbar, class 1.6
Type WIKA
obtainable from: Alexander Wiegand GmbH & Co. Alexander-Wiegand-Strasse 30 D-63911 Klingenberg am Main Germany
Tel.: 00 49 9372/1320
Digital multimeter
Hazet torque wrench obtainable from:
Hommel Heidelberger Str. 52 D-68519 Viernheim Germany
Tel.: 00 49 6204/738-0 Fax: 00 49 6204/739-222
Tools and Test Equipment 39
Page 40
40

9. Technical data

MEDUMAT Easy
Product category according to
II b
93/42/EEC
Dimensions L x W x H
Weight incl. accessories
100 x 145 x 90 incl. connections
approx. 0.6 kg
Operation: – Temperature range – Humidity – Air pressure
-18°C to +60°C max. 95 % 70 kPa to 110 kPa
Storage -40°C to +70°C
Electromagnetic compatibility acc. to EN60601-1-2 and EN 794-3:
(the test parameters and threshold values are obtainable from the manufacturer on request)
– Radio interference
suppression
EN 55011
– Radio interference
resistance
Control
EN 61000-4-2 to 3
Timing pulse, volume constant
Gas input Medicinal oxygen
Operating pressure 2.7 to 6.0 bar
Minimum gas volume required
Insp-exp. ratio
Ventilation frequency
Minute volume (MV) MV tolerances: – Room temp. (20 °C)
70 l/min O
2
1:1.67
Continuously variable from 10 to 30 min
continuously adjustable from 3 to 16 l/min for 3 l/min =±20% for >3 l/min = ±15%
– -18°C to +60°C
for 3 l/min =±35% for >3 l/min = ±20%
Max. ventilation pressure
concentration
O
2
Pressurized gas connection
20 or 45 mbar
100% O
2
External thread G 3/8
MEDUMAT Easy
Patient valve – Expiration tube
Power supply
30 mm socket ISO 5356-1
Maintenance-free lithium
battery 3.6 V; 5.2 Ah, Life expectancy Max. storage period
Auxiliary power for
> 2 years
10 years after delivery
Button cell CR 2430 alarm system Max. storage period
10 years after delivery
Fuse F1 T 500 L 250 V
Ventilation hose
Degree of protection against water
Standards complied with
Spiral silicone
NW 10
IP X4
EN 794-3;
EN 60601-1
EN 1789
Alarm sound pressure 60 dB (A)
Accuracy of ventilation pressure measurement
±5% of upper range
value
Resistance, patient valve (under EN 794-3): – Inspiration – Expiration – Spontaneous
<6 mbar at 60 l/min
<6 mbar at 60 l/min
<1.5 mbar at 30 l/min
breathing
Elasticity of breathing
-1
system
Patient valve dead space
Components with critical flow direction
Components containing latex
Subject to technical change without notice.
Negligible
12.8 ml
Patient valve
None
Ventilation hose connection
Patient valve – Inspiration tube
Technical data
External diameter 13 mm
15 mm socket 22 mm plug ISO 5356-1
Page 41

9.1 Pneumatic / electronic systems

The input pressure at p is max. 6bar. This is dynamically reduced by V1 to 2.5 bar. This is the input pressure at V2, V3 and V4.
Inspiration
An electrical impulse to V2 opens V3 and closes V4. Oxygen flows through the ventilation hose to the patient valve. If the ventilation pressure in the patient valve reaches >100 mbar, the relief valve V5 will open.
Expiration
A fresh electrical impulse closes V2. The relief valve V4 opens and vents the ventilation hose. The patient breathes out through the patient valve.
Demandflow
An inspiration impulse (trigger) at V2 opens valves V3 and V4.
Electronic system
The microprocessor-controlled electronic system sets the ventilation parameters and monitors ventilation, and also O2 supply and power supply. If necessary, a visual and acoustic alarm is given. The ventilator has an audio response facility that can be switched on for user guidance.
Patient valve
During inspiration the respiratory gas flows to the patient.
During expiration the expiration pressure switches the valve so that the patient can breathe out.
Technical data 41
Page 42

10. Technical Changes

Technical Changes From Device No. Date
New position of device information plates 2280 27.04.07
42 Technical Changes
Page 43

11. Repair and service records

Date Signature
Service performed in accordance
with MEDUMAT service
instructions
Company
_____________ __________________
Measures / Comments
Company
Date Signature
_____________ __________________
Company
Date Signature
_____________ __________________
Company
Date Signature
_____________ __________________
22525 Hamburg
Device master data Service and repair work carried out in accordance with service instructions
Manufacturer: WEINMANN GmbH +
Co.
Device type: MEDUMAT Easy
Order No.: ________________________
Date of manufacture: ________________
Safety check - 2 years _______________
Safety check - 4 years _______________
Repair and service records 43
Safety check - 6 years _______________
Safety check - 8 years _______________
Safety check - 10 years _______________
Page 44
Test record: Safety check in accordance with Test Instructions WM 28001
Device: MEDUMAT Easy WM No.: 28000 Device No.: .......………........ Date of manufacture: …...................
1. Testing equipment
• Pressure gauge 0 – 6.3 bar, class 1.6 (test pressure 6 ± 0.15 bar, operating pressure 4.5 ± 0.15 bar)
• O2 concentration meter
• Volume flow meter (e.g. RT 200, ViP, PF-300); adjustable orifice 10 mbar; test set WM 15323
• Digital multimeter
2. Preparations for test
• Connect MEDUMAT to test equipment.
• Set language “English”
• Set MEDUMAT to f = 10 min-1, MV = 11 l/min and “tube” (p
= 45 mbar).
max
3. Enter device data
• Entry of above device data Measurement OK not OK
4. Leak test at 6 bar
• Pressure drop inlet side 0.2 bar/min
• Pressure drop pressure measurement zone < 2.0 mbar/min
5. Self-test when device is switched on
• 4 red and 1 green LED (i.e. one each for “Tube” and “Mask”) light up alternately, alarm tone and audio response sound
6. Functional check, control elements
• Key check
7. Functional check, display elements
• Check on alarm LEDs
• Check on Demand mode LED
• Check on Ventilation pressure indicator LEDs
• Check on audio response
8. Check batteries
• 3.1 V ± 0.1 V
• 3.5 V + 0.2 / -0.1 V
9. Check pressure sensors
• Input pressure sensor
• Ventilation pressure sensor
• Demandflow sensor
10.Check frequency setting
• Frequency 14 ± 2 min
• Frequency 10 ± 2 min
• Frequency 30 ± 2 min
-1
-1
-1
11.Check breath volume at 4.5 bar supply pressure and 10 mbar back pressure
• f = 14 min-1, MV = 16 l/min: BV = 1140 ± 170 ml
• f = 10 min-1, MV = 11 l/min: BV = 1100 ± 170 ml
• f = 30 min-1, MV = 3 l/min: BV = 100 ± 20 ml
12.Check O2 concentration at f = 10 min-1 and MV = 11 l/min
• O2 concentration > 98 vol.%
13.Functional check on pressure limit at f = 10 min-1 and MV = 11 l/min
• Pressure limit “Mask” responds at 20 ± 5 mbar
• Pressure limit “Tube” responds at 45 ± 5 mbar
14.Functional check on relief valve
• Test bag is fully inflated, then ventilator vents audibly
15.Check on equipment and accessories
Present yes no
• Ventilation hose and patient valve undamaged and operational
• Test set for functional check operational
• Pressure reducer operational
• O2 cylinder within test deadline, valve operational
• Carrying platform complete and operational
• Medical products book
• Operating instructions
16.Check on external condition
• Connection thread undamaged, adjuster knob operational, index function working, swivelling elbow outlet moves easily
Service performed: yes no Final check performed: ______ _______ __________________
Date Tester No. Signature
44 Repair and service records
Page 45
Page 46
Page 47
Page 48
Weinmann Geräte für Medizin GmbH+Co. KG
P.O. Box 540268 • D-22502 Hamburg Kronsaalsweg 40 • D-22525 Hamburg T: +49-(0)40-5 47 02-0 F: +49-(0)40-5 47 02-461 E: info@weinmann.de www.weinmann.de
Center for Production, Logistics, Service
Weinmann Geräte für Medizin GmbH+Co. KG Siebenstücken 14 D-24558 Henstedt-Ulzburg T: +49-(0)4193-88 91-0 F: +49-(0)4193-88 91-450
WM 16998d - 12.08
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