Weinmann MEDUMAT Basic Setup guide

MEDUMAT Basic
Ventilator WM 22600
MEDUMAT Basic p
Ventilator WM 22650
Servicing and repair instructions

2
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Symbols used on the ventilator . . . . . . . . 5
2. Description of ventilator . . . . . . . . . . . . . . . . . 6
2.1 Uses . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Ventilation function . . . . . . . . . . . . . . . 6
2.3 Patient valve . . . . . . . . . . . . . . . . . . . 7
3. Final Check . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1 Test resources required . . . . . . . . . . . . 8
3.2 Preparations for final check . . . . . . . . . . 9
3.3 Entering device data . . . . . . . . . . . . . . 9
3.4 Testing for leaks and checking pressure
reading . . . . . . . . . . . . . . . . . . . . . . 9
3.5 Device self-test after switching on . . . . . 10
3.6 Functional check on alarms . . . . . . . . . 10
3.7 Functional check on frequency setting . . 11
3.8 Functional check on tidal volume
at 4.5 bar delivery pressure and
10 mbar counterpressure . . . . . . . . . . 11
3.9 Checking oxygen concentration . . . . . . 12
3.10 Functional check on pressure limit . . . . 13
3.11 Functional check on exhaust valve
without patient valve . . . . . . . . . . . . . 13
3.12 Check the breath volume . . . . . . . . . . 13
3.13 Checking equipment and accessories
(system components) . . . . . . . . . . . . . 13
3.14 Checking external condition . . . . . . . . 14
3.15 Documentation . . . . . . . . . . . . . . . . . 14
4. Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1 Intervals and Scope . . . . . . . . . . . . . . 15
4.2 Batteries and fuses . . . . . . . . . . . . . . 16
4.3 Adjusting the pressure gauge . . . . . . . 16
4.4 Storage . . . . . . . . . . . . . . . . . . . . . 17
4.5 Disposal . . . . . . . . . . . . . . . . . . . . . 17
5. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . 18
6. Repair information and repair instructions . . 21
6.1 General . . . . . . . . . . . . . . . . . . . . . 21
6.2 Replacing the sieve in the compressed
gas connection . . . . . . . . . . . . . . . . 21
6.3 Changing the foam insert in the
pressure relief valve outlet . . . . . . . . . . 22
6.4 Opening the device . . . . . . . . . . . . . 22
6.5 Closing the device . . . . . . . . . . . . . . 23
6.6 Changing the batteries . . . . . . . . . . . 23
6.7 Replacing the fuse . . . . . . . . . . . . . . . 24
6.8 Replacing ventilation control knob . . . . 24
6.9 Calibration after removal of PCB,
ventilation control knob 5 and/or
pneumatic block . . . . . . . . . . . . . . . . 25
6.10 Replacing the alarm signalling device . . 27
6.11 Replacing two-way switch for maximum
ventilation pressure ( MEDUMAT Basic /
Basic p Basic p only) . . . . . . . . . . . . . 28
6.12 Replacing the circuit board. . . . . . . . . 29
6.13 Replacing the pressure gauge . . . . . . . 31
6.14 Replacing the pneumatic block . . . . . . 32
6.15 Replacing the pneumatic block with
angled outlet . . . . . . . . . . . . . . . . . . 34
6.16 Replace 3/2 solenoid valve. . . . . . . . 37
6.17 Changing the Air Mix/
No Air Mix switch . . . . . . . . . . . . . . 38
6.18 Replace upper part of housing/
control panel . . . . . . . . . . . . . . . . . . 39
6.19 Replacing the housing base section . . . 45
6.20 Upgrading ventilation tube . . . . . . . . . 46
7. Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . 47
7.1 List of spare parts . . . . . . . . . . . . . . . 47
7.2 Maintenance set. . . . . . . . . . . . . . . . 49
8. Tools and test equipment . . . . . . . . . . . . . . . 51
8.1 General tools. . . . . . . . . . . . . . . . . . 51
8.2 Special tools . . . . . . . . . . . . . . . . . . 51
8.3 Test equipment . . . . . . . . . . . . . . . . . 52
9. Technical data . . . . . . . . . . . . . . . . . . . . . . . 53
9.1 Pneumatics . . . . . . . . . . . . . . . . . . . 54
9.2 O2content when using Air Mix. . . . . . 55
10. Technical Changes . . . . . . . . . . . . . . . . . . . . 56
11. Repair and inspection log. . . . . . . . . . . . . . . 57
© 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.

3
Introduction
For decades, Weinmann has developed, manu-
factured and distributed equipment for emergency
medicine, oxygen therapy and inhalation therapy.
In 1972, Weinmann introduced the first
MEDUMAT emergency ventilator to the market.
MEDUMAT emergency ventilators are automatic
resuscitators. They are used for controlled respirati-
on in emergency medicine, e.g. in the event of
acute ventilatory disorders, and for secondary ob-
structions.
The new generation of equipment, which was
especially developed to meet the requirements of
users, offers users and patients an enhanced level
of safety. An intelligent alarm system monitors the
patient's breathing and notifies the user of any mal-
functions. Hence, this technology offers even grea-
ter safety and reliability during respiration.
The aim of these service and repair instructions is
to familiarise you, as a knowledgeable expert, with
the MEDUMAT in terms of function, technology
and repairs. In conjunction with the training you
have already received from Weinmann, you are
now a "trained, qualified expert" and are able to
instruct your clients correctly, rectify faults yourself,
and perform the functional checks described in the
instructions for use, as well as conduct any repairs
which may be necessary, as outlined in these ser-
vice and repair instructions.
In the event of a guarantee claim, MEDUMAT should
be returned to Weinmann.
To enable us to process any guarantee or goodwill
claims, please return the consumer's proof of
purchase (invoice) together with the device.
Repairs and maintenance work must be carried out
only by Weinmann or by knowledgeable experts.
You are responsible for all repairs performed by
yourself and the warranty thereof!
Only original Weinmann spare parts should be used
for repair purposes.
Please remember:
Your customer trusts you and relies on your experti-
se, just as you rely on Weinmann.
Note:
The following information can be found in the description and operating instructions for MEDUMAT:
•Safety instructions
•Mounting with the wall bracket STATION MEDUMAT,
Mounting of accessories
• Operation
• Hygienic preparation
• Functional check

4Overview
1. Overview
Control panel MEDUMAT Basic, Basic p
MEDUMAT Basic, Basic p connections
1Ventilation pressure gauge
(Manometer)
6Colour code
4Air Mix/No Air Mix switch
3Alarm mute button2Alarm panel
8ON/OFF switch
7Recommendations for ventilation
settings
5Minute volume regulator
9Tumbler switch for setting max.
ventilation pressure (Basic p only)
O/I
Basicp
O/I
MEDUMAT
®
Basic
Typ
SN:
:
:
11 Locking latch for STATION
MEDUMAT wall bracket
10 Pressure gas connection
O/I
MEDUMAT
®
Basic
12 Connection for ventilation hose
14 Relief valve
15 Dust cover
13 Pressure gauge hose connection
16 Mixed air filter
up to appliance no.: Basic 1019
Basic p 1399 from appliance no.: Basic 1020 Basic p 1400
12
13

Overview 5
1.1 Symbols used on the ventilator
SN :
:
O/I
O/I
T
yp
S
N:
:
:
Inlet 2,7 - 6 bar O2.
MEDUMAT Basic / Basic p device information plate
SN 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.

6Description of ventilator
2. Description of ventilator
2.1 Uses
MEDUMAT Basic / Basic p is an automatic (short-term) ventilator.
You can use MEDUMAT Basic / Basic p:
• to revive patients at the site of an emergency
• on a longer term basis in more protracted
emergencies, e.g. fires.
You can use MEDUMAT Basic / Basic p whilst
transporting patients:
• between the various rooms and departments
of a hospital;
• between the hospital and other premises;
• in emergencies;
•when transport over a considerable distance is
planned.
MEDUMAT Basic / Basic p:
•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 Pmax is not ex-
ceeded.
• can be supplied with additional modules for
aspiration and oxygen inhalation. (N.B.
MEDUMAT Basic / Basic p cannot be used
as a ventilator simultaneously with these mod-
ules)
2.2 Ventilation function
MEDUMAT Basic / Basic p operates within a pres-
sure 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
pack.
The gas used for ventilation is highly compressed
medical oxygen, which is reduced to the required
operating pressure by a two-stage external pres-
sure reducer. The oxygen supply is fed in at input
valve 10.
The continuously adjustable ventilation settings and
the inspiration/expiration ratio of1:1.67 are regu-
lated internally by electronic control processes.
The gas for inspiration flows along the hose and
through the patient valve and either the mask or the
tracheal tube into the patient’s airways. The patient
valve is fitted with a lip membrane that enables ex-
pired gas to be conducted away through the expi-
ration tube.
O/I
Basicp
10

Description of ventilator 7
At the normal Air Mix setting, atmospheric air is ad-
mixed to give an O2-concentration of between
55% and 85% at 10 mbar ventilation pressure
(see “9.2 O2 content when using Air Mix“ on
page 55).
In certain indications and in cases where the sur-
rounding atmosphere is contaminated, you can
switch to No Air Mix and ventilate with pure oxy-
gen.
The injector unit is switched off when switching
from Air Mix to No Air Mix. This increases minute
volume which can result in the set pressure limit be-
ing exceeded and a stenosis alarm (Stenosis) being
triggered. In this case, set minute volume corre-
spondingly lower.
In the opposite instance, in other words when
switching from No Air Mix to Air Mix, the injector
unit is switched on. This reduces minute volume
which can lead to the set pressure limit being un-
dershot. In this case, set minute volume correspond-
ingly higher.
You can check the course of the ventilation on pres-
sure gauge 1.
2.3 Patient valve
The gas for inspiration is channelled into the patient’s air-
ways through the patient valve.
This valve is designed to enable spontaneous breathing
in case of equipment failure.
O/I
KL.1,6
-20
0
20
40
60
80
EN 837
mbar
S
O2
10 mbar =
1 kPa
10
45
1
Lip membrane
Diaphragm for
spontaneous
breathing arm
Diaphragm for
exspirations arm

8Final Check
3. Final Check
After any repair and maintenance work, the device
must be subjected to the following final check in
accordance with the Test Instructions WM 22671
and Test Record.
Note:
For a final check on the MEDUMAT Basic /
Basic p you must connect the respiration tube and
the patient valve.
If the final check reveals faults or deviations from
the specified values, you must not use the
MEDUMAT Basic / Basic p.
We recommend you to keep the following parts in
stock:
• Replacement seals for device connections;
• Replacement dust filter;
• Lip diaphragm for patient valve;
• Diaphragm for spontaneous breathing leg;
• Diaphragm for expiration leg;
• O–Ring 1145/118.
3.1 Test resources required
• Flowmeter, PF 300 (imtmedical), RT 200 (Timeter), EKU VIP (EKU Elektronik) or comparable testing
device
• Functional check test set WM 15335
• Adjustable orifice, e.g. ball valve, internal diameter ≥10 mm
• Oxygen concentration measuring device, 0 – 100 % ± 1 %,
e.g. Type Oxycontrol WM 13550
• Set: hose with injector WM 15359
• Pressure gauge 0 - 13 bar, class 1.6
• Pressure gauge 0 - 160 mbar, class 1.6
• Set, supply test Medumat / Modules WM 15440
Default settings for flow meter PF300
If you have a comparable testing device, contact WEINMANN’s Technical Support department to have the
setting parameters calibrated.
Settings Values
Default settings:
– Type of gas
– Gas standardization
Air/02auto
STP
Trigger settings:
– Type of ventilation
– Source
– Start
– End
– Delay
– Base flow rate
Adult
Internal HF
Flow rate ≥3.0 l/min
Flow rate ≤3,0 l/min
60 ms
disabled
Units and measured values:
– P high
– P diff
– Rate
– Vti
– O2
bar
mbar
1/min or b/min
ml
%

Final Check 9
3.2 Preparations for final check
1. Connect MEDUMAT Basic / Basic p to pressure supply 4.5 – 6 bar of cylinder system.
2. Connect respiration tube and pressure measurement tube to MEDUMAT Basic / Basic p.
3. Set MEDUMAT Basic / Basic p with switch in position No Air Mix to Freq. = 30 min-1, MV = 3 l/min
and Pmax = 45 mbar.
4. Start check.
3.3 Entering device data
• Enter the device number and date of manufacture in the Test Record.
3.4 Testing for leaks and checking pressure reading
3.4.1 Testing for leaks on the inlet side
• With device switched off, apply pressure of 6 bar to inlet side and shut off outlet pressure.
• Set lever to No Air Mix.
Requirement: The pressure drop must be less than 0.2 bar/min.
• Set lever to Air Mix.
Requirement: The pressure drop must be less than 0.2 bar/min.
3.4.2 Testing for leaks in pressure measurement segment
• Apply pressure of 60 mbar to pressure measurement segment of MEDUMAT Basic / Basic p.
•During the measurement, a traction force of approx. 3 N must be applied manually to the elbow outlet.
Requirement: The pressure drop must be less than 2 mbar/min.
3.4.3 Checking pressure reading
1. Attach T-connector with injector (WM 15359)
to pressure measurement connection 13.
2. Connect test pressure gauge 0 - 100 mbar or
Timeter to free end of T-connector (pressure
gauge/volumetric flowmeter not supplied with
device).
3. Use injector to create a pressure of 55 mbar
as shown on the test pressure gauge.
Requirement: Respiration pressure reading must not
deviate from set value by more than ≤≤
≤≤ 1.5 mbar.
O/I
MEDUMAT
®
Basic
Typ
SN:
:
:
Pressure gauge
Test pressure
Injector
gauge

10 Final Check
3.5 Device self-test after switching on
1. Apply approx. 4.5 bar to the inlet.
2. Switch on MEDUMAT Basic / Basic p at pushbutton 8O/I.
Requirement: The self-test is activated: all 4 LEDs light up together and a brief signal tone sounds.
3.6 Functional check on alarms
3.6.1 Stenosis alarm check up to appliance no.: Basic 1019; Basic p 1399
• Set MEDUMAT Basic / Basic p to the Air Mix setting at f = 30/min, MV = 3 l/min and
pmax = 45 mbar. Close patient valve outlet.
Note: Over-response of needle is normal.
Requirement: The stenosis alarm must be activated after two respiration cycles.
• Set MEDUMAT Basic / Basic p to the No Air Mix setting at f = 30/min, MV = 3 l/min and
pmax = 45 mbar. Close patient valve outlet.
Note: Over-response of needle is normal.
Requirement: The stenosis alarm must be activated after two respiration cycles.
3.6.2 Stenosis alarm check from appliance no.: Basic 1020; Basic p 1400
• Set MEDUMAT Basic / Basic p to the Air Mix setting at f = 30/min, MV = 3 l/min and
pmax = 45 mbar. Close patient valve outlet.
Note: Over-response of needle is normal.
MEDUMAT Basic / Basic p briefly switches to expiration if the maximum ventilation pressure is exceed-
ed, but then tries to continue inspiration in the same inspiration phase.
If the maximum ventilation pressure is exceeded for a second time during the same inspiration phase,
the unit finally switches to expiration and vents the patient tube system completely. The next inspiration
begins with the following ventilation stroke according to the frequency selected.
Requirement: The stenosis alarm must be activated after two respiration cycles.
• Set MEDUMAT Basic / Basic p to the No Air Mix setting at f = 30/min, MV = 3 l/min and
pmax = 45 mbar. Close patient valve outlet.
Note: Over-response of needle is normal.
Requirement: The stenosis alarm must be activated after two respiration cycles.
3.6.3 Test alarm mute button
• Immediately after first alarm tone sounds, press button 3alarm acknowledgement.
Requirement: The alarm tone must be suppressed immediately. The alarm sounds again after approx.
1 min (or immediately, if parameters are changed).
3.6.4 Disconnection alarm check
• Open patient valve outlet.
Requirement: The disconnection alarm must be activated after two respiration cycles.
3.6.5 Pressure alarm check
• Shut off pressurised gas connection of MEDUMAT Basic / Basic p (2.7 - 6.0 bar).
Requirement: The pressure alarm must be activated.

Final Check 11
3.7 Functional check on frequency setting
Connect respiration tube to 10 mbar orifice and to volumetric flowmeter.
1. Run MEDUMAT Basic / Basic p in position No Air Mix, Freq. = 16 min-1 and MV = 20 l/min.
Requirement: The measured frequency must be 16 ± 2 min-1.
2. Run MEDUMAT Basic / Basic p in position No Air Mix, Freq. = 10 min-1 and MV = 11 l/min.
Requirement: The measured frequency must be 10 ± 2 min-1 .
3. Run MEDUMAT Basic / Basic p in position No Air Mix, Freq. = 30 min-1 and MV = 3 l/min.
Requirement: The measured frequency must be 30 ± 2 min-1 .
3.8 Functional check on tidal volume at 4.5 bar delivery pressure
and 10 mbar counterpressure
1. Run MEDUMAT Basic / Basic p in position No Air Mix, Freq. = 16 min-1 and MV = 20 l/min.
Requirement: Tidal volume must be 1250 ± 190 ml.
Switch MEDUMAT Basic / Basic p to position Air Mix.
Requirement: Tidal volume must be 1250 ± 190 ml.
2. Run MEDUMAT Basic / Basic p in position No Air Mix, Freq. = 10 min-1 and MV = 11 l/min.
Requirement: Tidal volume must be 1100 ± 170 ml.
Switch MEDUMAT Basic / Basic p to position Air Mix.
Requirement: Tidal volume must be 1100 ± 170 ml.
O/I
MEDUMAT
®
Basic
Typ
SN:
:
:
Patient valve with
tube system
Orifice 10 mbar
Volumetric flowmeter open

12 Final Check
3. Run MEDUMAT Basic / Basic p in position No Air Mix, Freq. = 30 min-1 and MV = 3 l/min.
Requirement: Tidal volume must be 100 ± 20 ml.
Switch MEDUMAT Basic / Basic p to position Air Mix.
Requirement: Tidal volume must be 100 ± 20 ml.
3.9 Checking oxygen concentration
1. Run MEDUMAT Basic / Basic p in position Freq. = 10 min-1 and MV = 11 l/min with 100 % O2.
2. Check O2 concentration in position No Air Mix.
Requirement: The O2concentration must be greater than 98 %.
3. Check O2concentration in position Air Mix.
Requirement: The O2concentration must lie between 50 % and 65 %.
O/I
MEDUMAT
®
Basic
Orifice set to
Volumetric flowmeter
Patient valve with
tube system
10 mbar

Final Check 13
3.10 Functional check on pressure limit
1. Connect respiration tube to test bag.
2. Set MEDUMAT Basic / Basic p to No Air Mix, Freq. = 11 min-1 and MV = 7 l/min.
3. Applies to MEDUMAT Basic / Basic p Basic p only
Set pressure limit to 20 mbar.
Requirement: The pressure limit must respond at 20 ± 5 mbar and trigger the stenosis alarm.
4. Applies to MEDUMAT Basic / Basic p Basic and MEDUMAT Basic / Basic p Basic p
Set pressure limit to 45 mbar.
Requirement: The pressure limit must respond at 45 ± 5 mbar and trigger the stenosis alarm.
3.11 Functional check on exhaust valve without patient valve
1. Run MEDUMAT Basic / Basic p in position f = 10 min-1 and MV = 11 l/min.
2. Connect patient valve to device outlet with expiration outlet closed, without lip diaphragm and with test
bag.
Requirement: The test bag is completely inflated in one inspiration stroke. The respiration device can then
be heard to exhaust.
3.12 Check the breath volume
See “Check the breath volume” in the description and operating instructions for MEDUMAT.
3.13 Checking equipment and accessories (system components)
• Respiration tube with patient valve undamaged and in working order
• Functional check test set in working order
• Pressure reducer in working order
• O2cylinder within test deadline; valve in working order
• Portable system complete and in working order
• Medical products book present
• Operating instructions present

14 Final Check
3.14 Checking external condition
• Check external condition of device.
Requirement: No mechanical damage to housing.
Device labels with operating information are legible.
Sealing sleeves are properly seated.
Pressure gauge zero reading is correct.
Connecting thread G3/8 is undamaged and functions smoothly.
All rotary knobs are self-locking against inadvertent readjustment.
3.15 Documentation
• Document points 4. to 13. in the Test Record, along with test date and tester number.

Servicing 15
4. Servicing
N.B.
Always remember to carry out a technical safety check of the ventilator after every repair.
MEDUMAT Basic / Basic p must be serviced regularly.
We recommend having all maintenance work, servicing and repairs carried out either by the manufacturer
Weinmann or by a qualified agent expressly authorised by that company.
4.1 Intervals and Scope
Every 2 years:
Every 2 years, you must subject the device (including patient valve and tube system) to a technical safety check
and maintenance.
The servicing and inspection may also be carried out by the manufacturer Weinmann.
The following points should be observed:
• Check that the equipment is complete
• Visual check for:
– physical or mechanical damage
– correct markings on controls
– damage to all external hoses
• Replacement of worn components/
compulsory change parts (see “7.2 Mainte-
nance set” on page 49);
• Check of system components: portable sys-
tem, oxygen supply fittings, secretion suction
system, hose connections etc.
• Check test bag.
• Repeat testing of aluminium oxygen bottles
WM 1821 and WM 3621 by the Technical
Testing Association. The specified testing date
is stamped on the shoulder of the bottle.
• Final check in accordance with Test Instructions/
Test Report STK WM 22671 (see „3. Final Check“
on page 8 and see “11. Repair and inspection
log” on page 57).
Every 4 years:
•Servicing of the fittings in the oxygen supply system (e.g. pressure reducer) either by the manufacturer or
by a qualified agent expressly authorised by him.
Every 10 years:
•Repeat testing of the conventional steel or aluminium oxygen bottles by the Technical Testing Association.
The specified testing date is stamped on the shoulder of the bottle.

16 Servicing
4.2 Batteries and fuses
MEDUMAT Basic / Basic p is fitted with two bat-
teries which must always be changed together:
A button cell CR2430 17 supplies the electronics
with auxiliary power if the capacity of the main
battery 19 is exhausted. This means that an alarm
can still be activated in the event of sudden failure
of the main battery. The device switches to expira-
tion.
As a general rule, the capacities of the batteries
are designed in such a way that under normal us-
age conditions, they do not need to be changed
during the 2-year servicing intervals. Within the
context of the prescribed 2-year servicing, the bat-
teries are replaced completely.
We recommend that the batteries be changed
only by the manufacturer Weinmann or by authori-
sed specialists explicity authorised by them, since
special precautions must be taken to protect the
electronics (see “6.6 Changing the batteries” on
page 23)).
For information on replacing the fuse, see Section
„6.7 Replacing the fuse“ on page 24.
4.3 Adjusting the pressure gauge
In the idle state, with MEDUMAT Basic / Basic p deactivated and the oxygen cylinder closed, the needle of
the pressure gauge must point precisely to “0”.
To adjust the needle, proceed as follows:
1. Carefully lever out the plastic cover of the ad-
justing screw.
2. Adjust the needle with the adjusting screw
using a small screwdriver.
3. Re-insert the plastic cover.
17:Button cell for auxiliary power
18:Fuse to prevent internal short-circuiting
19:Lithium battery 3.6 V for main power to
MEDUMAT Basic / Basic p
17
19
18
Adjusting screw

Servicing 17
4.4 Storage
If you are not intending to use MEDUMAT Basic / Basic p for a long period, we recommend the following
storage precautions:
1. Clean and disinfect the ventilator (see
“5. Hygienic preparation” of the description
and operating instructions for MEDUMAT).
2. Store MEDUMAT Basic / Basic p in a dry
place.
Important note!
Remember that the ventilator still requires servicing
at the stipulated intervals even when in storage,
otherwise it cannot be used when removed from
storage.
4.5 Disposal
Do not dispose of the unit with domestic waste. For proper waste disposal of the equipment, please
contact an approved and certified waste disposal site for electronic goods. Ask your Environmental
Officer or town council for the address.

18 Troubleshooting
5. Troubleshooting
Defect Cause of defect Elimination
MEDUMAT Basic / Basic p
Basic, Basic p cannot be
switched on
Battery failure Replace both batteries
(chap. 6.6, page 23)
Fuse is defective Replace the fuse (chap. 6.7,
page 24)
Ribbon cable to front membrane
faulty or not connected
Check plug-in connectors X7 and
cable (chap. 6.12, page 29);
If necessary replace top of housing
(chap. 6.18, page 39)
On/Off switch faulty If necessary replace top of housing
(chap. 6.18, page 39)
Circuit board faulty Replace circuit board (chap. 6.12,
page 29)
MEDUMAT Basic / Basic p
Basic, Basic p cannot be
switched off
User error Keep switch 8depressed for at least
2 seconds
On/Off switch 8faulty If necessary replace top of housing
(chap. 6.18, page 39)
MEDUMAT Basic / Basic p
Basic, Basic p is functioning
but without any displays
Pressure gauge hose on
MEDUMAT Basic / Basic p Basic,
Basic p or on patient valve slipped
off Check pressure gauge hose
Kink in pressure gauge hose
MV too high Measured without 10 mbar
counterpressure Set to 10 mbar counterpressure
MEDUMAT Basic / Basic p
Basic, Basic p:
MV not correct
Measuring device not calibrated Calibrate measuring device
Spindles in pneumatic block out of
adjustment
Replace pneumatic block (chap.
6.14, page 32)
or replace pneumatic block with
angled outlet (chap. 6.15,
page 34)
MEDUMAT Basic / Basic p
Basic only:
MV not correct
Inlet pressure > 6 bar Adjust system to below 6 bar
Patient valve not in order
Check diaphragms and O-ring,
replace if necessary (Chapter 6.8 of
Operating Instructions)
Adjustment knob incorrectly set Reset adjustment knob (chap. 6.9,
page 25)
Air Mix/No Air Mix switch 4faulty Replace switch (chap. 6.17,
page 38)
Leak in pneumatic block
Replace pneumatic block (chap.
6.14, page 32)
or replace pneumatic block with
angled outlet (chap. 6.15,
page 34)

Troubleshooting 19
Pressure limit (Pmax) incorrect
Incorrect setting selected on device Make correct setting (Chapter 6.5 of
Operating Instructions)
Pressure gauge not reading “0”
Adjust (chap. 4.3, page 16) or
replace pressure gauge (chap.
6.13, page 31)
Patient valve not in working order
Check diaphragms and O-ring, if
necessary replace (Chapter 6.8 of
Operating Instructions)
Patient valve or test bag incorrectly
connected Check tube connections and bag
MV not correct See defect “MV not correct”
Tube connections in device faulty Check tubes and replace if
necessary (chap. 6.14, page 32)
Pressure sensor on circuit board
faulty
Replace circuit board (chap. 6.12,
page 29)
Potentiometer for frequency faulty
Replace pneumatic block (chap.
6.14, page 32)
or replace pneumatic block with
angled outlet (chap. 6.15,
page 34)
Pressure measurement connection
blocked Replace (chap. 6.10, page 27)
Two-way switch 945 mbar/
20 mbar faulty (for
MEDUMAT Basic / Basic p Basic p)
Replace switch (chap. 6.17,
page 38)
Alarms (visual and acoustic)
faulty
LEDs do not light up Replace top of housing (chap. 6.18,
page 39)
Incorrect indication
(Stenosis/Disconnection)
Check settings, check tube
connection to patient valve
(Chapter 6.8 of Operating
Instructions)
No alarm (visual + acoustic) Circuit board faulty Replace circuit board (chap. 6.12,
page 29)
No acoustic alarm
Alarm acknowledgement pressed Wait for 30 – 120 s
Alarm sensor faulty Replace alarm sensor (chap. 6.10,
page 27)
No stenosis alarm Valve unit membrane leaking Check that valve membrane is
properly seated
Alarm < 2,7 bar despite
existence of pressure
Pressure sensor faulty Replace circuit board (chap. 6.12,
page 29)
Tube connections in device faulty Check tubes and replace if
necessary (chap. 6.14, page 32)
Alarm Battery failing Replace both batteries (chap. 6.6,
page 23)
Leak at pressure inlet Elbow connector in device loose or
faulty Check (chap. 6.19, page 45)
Leaks in tubes in device Check tubes and replace if
necessary (chap. 6.14, page 32)
Defect Cause of defect Elimination

20 Troubleshooting
Leak in pressure sensor on
circuit board
Replace circuit board (chap. 6.12,
page 29)
Air Mix/No Air Mix switch 4
faulty
Replace switch (chap. 6.17,
page 38)
Leak in pneumatic block Replace circuit board (chap. 6.14,
page 32)
O2concentration not correct
Measuring device not calibrated Calibrate measuring device
Incorrect measurement sequence Check No Air Mix first, then Air Mix
Air Mix/No Air Mix switch 4faulty Replace switch (chap. 6.17,
page 38)
Pneumatic block faulty
Replace pneumatic block (chap.
6.14, page 32)
or replace pneumatic block with
angled outlet (chap. 6.15,
page 34)
Frequencies incorrect
Adjustment knob out of adjustment Reset adjustment knob (chap. 6.9,
page 25)
Spindles (MV + frequency in
MEDUMAT Basic / Basic p Basic)
out of adjustment
Replace pneumatic block (chap.
6.14, page 32)
or replace pneumatic block with
angled outlet (chap. 6.15,
page 34)
Test bag is not sufficiently
inflated during functional
check, disconnection alarm
Ventilation parameters wrongly
selected Correct ventilation parameters
Patient valve not working properly Check lip membrane
Pressure gauge hose not fitted Fit pressure gauge hose
No stenosis alarm when
patient valve is closed during
functional check, see
“Functional check on tidal
volume” (chap. 3.8,
page 11)
Patient valve not working properly Check lip membrane
Defect Cause of defect Elimination