Weinmann WM 24900 User manual

Servicing and
repair instructions
SOMNO smart 2
smart PAP-device WM 24900
SOMNO smart 2 with SOMNO click WM 24950
SOMNO smart 2 with SOMNO click 300
WM 24975
SOMNO set
Titration Device WM 23200
SOMNO set with SOMNO support WM 23210
SOMNO soft +
CPAP device with softPAP exhalation relief and
therapy monitoring WM 24600
SOMNO soft + with SOMNO click WM 24610
SOMNO soft + with SOMNO click 300 WM 24675

2
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Description . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Purpose of SOMNO smart 2 . . . . . . . . . 6
2.2 Purpose of SOMNO set . . . . . . . . . . . . 6
2.3 Uses SOMNO soft + . . . . . . . . . . . . . . . 7
2.4 Function of SOMNO smart 2 . . . . . . . . . 7
2.5 Function of SOMNO set . . . . . . . . . . . . 8
2.6 Functional description of SOMNO soft + . . 9
3. Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Intervals . . . . . . . . . . . . . . . . . . . . . . 10
3.2 Filter change . . . . . . . . . . . . . . . . . . . 10
– Coarse dust filter
– Fine filter
3.3 Cleaning the device . . . . . . . . . . . . . . 11
3.4 Resetting the service symbol . . . . . . . . . 12
3.5 Disposal . . . . . . . . . . . . . . . . . . . . . 12
4. Hygienic preparation . . . . . . . . . . . . . . . . . 13
4.1 Cleaning and disinfecting after use . . . . 13
4.2 Cleaning and disinfection after repair . . 13
4.3 Cleaning and disinfecting on change of
patient . . . . . . . . . . . . . . . . . . . . . . . 13
4.4 Cleaning and disinfecting the
SOMNO click/SOMNOclick 300
after use. . . . . . . . . . . . . . . . . . . . . .14
4.5 Cleaning and disinfecting the
SOMNOclick/SOMNOclick 300 on
change of patient . . . . . . . . . . . . . . .14
5. Test the device . . . . . . . . . . . . . . . . . . . . . . 15
5.1 General. . . . . . . . . . . . . . . . . . . . . .15
5.2 Performing the check . . . . . . . . . . . . .15
– Checking the power cord
– Checking the housing
– Checking display
– Checking pressure and button functions
– Checking OP signal (SOMNOsmart 2
and SOMNOset)
– Checking function of humidifier
6. Troubleshooting . . . . . . . . . . . . . . . . . . . . . 20
7. Repair Information and Instructions . . . . . . . 22
7.1 General. . . . . . . . . . . . . . . . . . . . . .22
7.2 Opening the device . . . . . . . . . . . . . .23
7.3 Closing the device. . . . . . . . . . . . . . .24
7.4 Replace Displayboard . . . . . . . . . . . .25
7.5 Replacing the fascia film . . . . . . . . . . .26
7.6 Changing fuses on the Powerboard . . .26
7.7 Replacing the Powerboard . . . . . . . . .27
7.8 Replacing the Smartboard/Softboard . .30
7.9 Replacing battery on Smartboard or
Softboard. . . . . . . . . . . . . . . . . . . . .31
7.10 Replacing transformer . . . . . . . . . . . . .31
7.11 Replacing the oscillation generator
(SOMNOsmart 2 and SOMNOset only) .34
7.12 Replacing the microphone
(SOMNOsmart 2 and SOMNOset only) .35
7.13 Replacing Smartbox/Comfortbox . . . . .35
7.14 Replacing the fan. . . . . . . . . . . . . . . .36
7.15 Replacing lower part of housing . . . . . .41
7.16 Replacing upper part of housing. . . . . .42
8. Tools, testing equipment and disinfectants . . 44
8.1 Tools. . . . . . . . . . . . . . . . . . . . . . . .44
8.2 Testing equipment and fixtures . . . . . . .44
8.3 Disinfectant. . . . . . . . . . . . . . . . . . . .45
9. Spare parts . . . . . . . . . . . . . . . . . . . . . . . . 46
9.1 Spare parts list . . . . . . . . . . . . . . . . .46
9.2 Spare parts required for servicing . . . . .48
10. Technical data . . . . . . . . . . . . . . . . . . . . . . 50
10.1 Specifications . . . . . . . . . . . . . . . . .50
10.2 Pressure-Volume curve. . . . . . . . . . . . .51
10.3 Safety distances . . . . . . . . . . . . . . . .52
11. Repair and service record . . . . . . . . . . . . . . 53
© 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.

Introduction 3
Introduction
For decades Weinmann has been developing,
manufacturing and marketing devices for sleep
apnoea therapy, inhalation therapy, oxygen
therapy and emergency medical care.
With its SOMNOcomfort and SOMNOvent S
and ST, and also SOMNOsmart 2, SOMNOset
and SOMNOsoft +, Weinmann offers a
graduated therapy concept from treatment of
sleep-related respiratory disorders to treatment of
global respiratory insufficiency.
The aim of these service and repair instructions is
to familiarize you, as a trained expert in the field,
with the function, technology, servicing and repair
of the SOMNOsmart 2, SOMNOset and
SOMNOsoft +. This will enable you to give your
customers proper instructions, eliminate faults
yourself, perform the tests specified in the operating
instructions, carry out any repairs and service the
device in accordance with these service and
repair instructions.
In the event of a guarantee claim, the devices must be
sent 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 spare parts 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 the individual devices:
• Safety instructions
•Preparing for use
• Operation
• Cleaning and disinfecting after use
• Guarantee

4Overview
1. Overview
SOMNOsmart 2, SOMNOset and SOMNOsoft +
SOMNOsoft +
1 hPa 1 cmH2O
1Therapy device
5Control panel
and display
7Device outlet port
10 Adapter
6Humidifier connection
11 Pressure measurement tube
13 Exhalation system
4Ports
3Power cord
Control panel and display SOMNOsmart 2
15 Cap
8Stopper (2x)
14 Mask
12 Hose system
Control panel and display SOMNOset
2Bacteria filter
9Drying adapter
21 LC display
22 Humidifier
activated
23 Service symbol
18 Change filters
27 Humidifier button
(Levels 1-6)
26 Softstart button
24 On/Off button
20 Therapy pressure
19 Pressure rise/Pressure
drop and softPAP mode
activated 28 Humidifier
indicator
lamp
16 Softstart symbol
17 Total therapy time /
Daily therapy time
P
ini
21 LC display
22 Humidifier
activated
23 Service symbol 27 Humidifier button
(Levels 1-6)
26 Softstart button
24 On/Off
button
20 Therapy pressure
25 Set button
16 Softstart symbol
17 Total therapy time /
Daily therapy time 18 Change filters
28 Humidifier
indicator lamp
P
ini
19 Pressure rise/
Pressure drop
Control panel and display SOMNOsoft +
21 LC display
22 Humidifier
activated
23 Service symbol 20 Therapy pressure
16 Softstart symbol
19 softPAP mode
activated
27 Humidifier button
(Levels 1-6)
26 Softstart button
24 On/Off
button
17 Total therapy time /
Daily therapy time
18 Change filters
28 Humidifier
indicator lamp

Overview 5
Dev
i
ce com
bi
nat
i
ons
DC-ACWANDLER
DC-ACINVERTER
IN
OUT
31 Rating plate 30 Power connection
32 Carrying bag
35 SOMNOclick/
SOMNOclick 300
33 Power inverter
34 O2switching valve
29 Filter cover

6Description
2. Description
Note:
SOMNOsmart 2, SOMNOset and SOMNOsoft + are of largely identical basic design. They differ only in
the software, display and fascia film. SOMNOsoft + has no oscillation generator and no microphone.
2.1 Purpose of SOMNOsmart 2
SOMNOsmart 2 is a smartPAP device for treating
sleep-related respiratory disorders.
SOMNOsmart 2 generates positive airway
pressure (PAP).
SOMNOsmart 2 is a self-regulating device. It
recognizes respiratory events and varies the
airway pressure accordingly.
While the patient is asleep, the airways are
braced by the air pressure generated.
Airway pressure is administered by means of a
mask.
SOMNOsmart 2 can be used for people aged
12 years or more.
SOMNOsmart 2 from software version 6.0; in gener-
al from device no. 10,000: The softPAP mode in-
creases patient comfort by means of a brief
pressure reduction during the transition from inha-
lation to exhalation.
Important!
SOMNOsmart 2 can reliably prevent closure of
the airways only if the upper and lower pressure
limits specific to the patient and prescribed by a
doctor have been determined, e.g. in a sleep
laboratory, and set accordingly.
SOMNOsmart 2 is not suitable for use as a life-
support system.
2.2 Purpose of SOMNOset
SOMNOset is a device for efficient adjustment to
CPAP patients. The device can work on a stand-
alone basis or in conjunction with the remote
control SOMNOadjust or an extended user
interface of the SOMNOsupport software. The
recorded data can also be visualized and
evaluated with the aid of SOMNOsupport.
SOMNOset permits titration without the patient
coming to a sleep laboratory. Titration can be
carried out in the patient's familiar surroundings.
SOMNOset generates positive airway pressure
(PAP).
SOMNOset may be operated as a self-regulating
device. In that case SOMNOset recognizes
respiratory events and varies the airway pressure
accordingly.
While the patient is asleep, the airways are
braced by the air pressure generated.
Airway pressure is administered by means of a
mask.
In the Autotitration mode the device determines,
during the titration night, a therapy pressure
(recommended titration pressure) that largely
prevents closure of the upper airways.
From the data recorded, the physician can
determine the required therapy pressure. This
pressure is set on the therapy device which is given
to the patient for long-term therapy following
titration.
SOMNOset can be used for people aged 12
years or more.
Important!
SOMNOset is not suitable for use as a life-support
system.

Description 7
2.3 Uses SOMNOsoft +
SOMNOsoft + is a CPAP device for treating sleep-
related respiratory disorders.
SOMNOsoft + generates positive airway pressure
(PAP).
The softPAP mode increases patient comfort by
means of a brief pressure reduction during the tran-
sition from inhalation to exhalation.
SOMNOsoft + recognises respiratory events. This
permits efficient therapy control.
During sleeping, the patient’s airways are braced
by the air pressure generated.
Airway pressure is administered by means of a
mask.
SOMNOsoft + can be used both in CPAP mode
and in softPAP mode for individuals aged 12 years
or more.
Important!
SOMNOsoft + can reliably prevent closure of the
airways only if the therapy pressure specific to the
patient and prescribed by a physician has been
determined, e.g. in a sleep laboratory.
SOMNOsoft + is not suitable for use as a life-sup-
port system.
2.4 Function of SOMNOsmart 2
SOMNOsmart 2 works on the principle of an
electrically powered flow generator delivering an
electronically controlled constant pressure level.
A radial fan draws in ambient air through a filter
and conveys it to the device outlet port. From here
the air flows through the hose system and the mask
to the patient.
An oscillation generator creates a slight sinusoidal
pneumatic oscillation in the air flow produced by
the device.
The airway and oscillation pressure is registered
via the pressure measurement tube in the mask.
The current oscillation pressure reading is
compared with an average value and the
preceding values. This evaluation of the oscillation
pressure makes it possible to identify any
significant change in airway resistance and hence
to increase or reduce the therapy pressure via the
flow generator.
The pressure present in the mask is shown in the LC
display. The microprocessor-controlled flow
generator regulates the pressure at the value
determined.
The device also records a respiratory flow signal
that can be output to a PSG system or read off with
the aid of SOMNOsupport. This makes it possible
to identify apnoea, hypopnoea and respiratory
flow limitations.
The exhalation system before the mask prevents
accumulation of CO2-enriched expired air in the
hose system.
Auto switch-on can be activated on the
SOMNOsmart 2. The device can then be
switched on by breathing into the mask. If there is
no pressure for about 5 seconds (e.g. because the
mask is taken off), the SOMNOsmart 2 switches
off automatically.
Following a power failure and resumption of the
power supply, the status of SOMNOsmart 2 is the
same as it was before the power failure. The
stored data remain preserved.
There are two functions designed to make it easier
to go to sleep: (soft-)start or start pressure function.
(Soft-)start function: When this is switched on, the
pressure is adjusted to the (soft-)start pressure set by
the physician. The pressure limits then gradually in-
crease to the set values. The time taken for this in-
crease is adjustable. This function is suitable for
patients who find the high pressure unpleasant
while they are awake.
Additional function from software version 6.0:
Start pressure function: The pressure remains at the
set value throughout the start period. At the end of
the start period, the pressure is reduced to the low-
er pressure limit. This function is suitable for
patients who find low pressure unpleasant while
they are awake, or who need high pressure quick-
ly after they have gone to sleep.

8Description
In softPAP mode the respiratory flow curve is ana-
lysed continuously to ensure timely recognition of
the transition between inhalation and exhalation.
Before the transition to exhalation the therapy pres-
sure is reduced to make it easier to breathe out.
The size of this pressure reduction can be set in two
stages: “slight” (stage 1) and “normal” (stage 2).
This increases patient comfort. Before the next in-
halation phase, the pressure is raised to the thera-
py figure once again.
If apnoea or valid flow limitations occur while the
patient is sleeping, the softPAP mode is automati-
cally deactivated for the relevant period. If the res-
piratory frequency is too high, the softPAP mode is
also temporarily deactivated. However, the thera-
py pressure remains reduced during this period.
In full face mode the device supports therapy with
a full face mask. The event-related pressure adjust-
ment is modified accordingly.
2.5 Function of SOMNOset
SOMNOset works on the principle of an
electrically powered flow generator delivering an
electronically controlled constant pressure level.
A radial fan draws in ambient air through a filter
and conveys it to the device outlet port. From here
the air flows through the hose system and the mask
to the patient.
An oscillation generator creates a slight sinusoidal
pneumatic oscillation in the air flow produced by
the device.
The airway and oscillation pressure is registered
via the pressure measurement tube in the hose
system.
The current oscillation pressure reading is
compared with an average value and the
preceding values. This evaluation of the oscillation
pressure makes it possible to identify any
significant change in airway resistance and hence
to increase or reduce the therapy pressure via the
flow generator.
The pressure present in the mask is shown in the LC
display. The microprocessor-controlled flow
generator regulates the pressure at the value
determined.
The values determined are recorded. In
Autotitration mode, the recommended therapy
pressure is calculated at the end of the titration
night.
The device also records a respiratory flow signal
that can be output to a PSG system or read off with
the aid of SOMNOsupport. This makes it possible
to identify apnoea, hypopnoea and respiratory
flow limitations.
The exhalation system before the mask prevents
accumulation of CO2-enriched expired air in the
hose system.
To make it easier for the patient to go to sleep, an
automatic Softstart system is incorporated for the
APAP and CPAP modes. When this is switched on,
the pressure is reduced to the Softstart pressure set
by the physician. The therapy pressure then
gradually increases to the set value. The period for
the pressure rise can be set in 5-minute steps
between 0 and 30 minutes. The automatic
Softstart system can be locked out by the
physician.
Auto switch-on can be activated in APAP and
CPAP modes. The device can then be switched on
by breathing into the mask. If there is no pressure
for about 5 seconds (e.g. because the mask is
taken off), the SOMNOset switches off
automatically.
If the power supply is interrupted and then
restored, data recording starts afresh in all modes.
In that case, pressure adjustment and event
evaluation restart in the Autotitration and APAP
modes. In the Pressure Profile and CPAP modes,
titration or therapy are continued in the status that
was active before the interruption. The stored data
remain recorded despite the interruption.

Description 9
2.6 Functional description of SOMNOsoft +
SOMNOsoft + works on the principle of an elec-
trically powered flow generator delivering an elec-
tronically controlled constant pressure level.
A radial fan draws in ambient air through a filter
and conveys it to the device outlet port. From here
the air flows through the hose system and mask to
the patient.
The airway pressure is registered via the pressure
measurement tube in the mask.
The pressure present in the mask is shown in the LC
display. The microprocessor-controlled flow gener-
ator regulates the pressure at the set value.
In softPAP mode the respiratory flow curve is ana-
lysed continuously to ensure timely recognition of
the transition between inhalation and exhalation.
Before the transition to exhalation the therapy pres-
sure is reduced to make it easier to breathe out.
The size of this pressure reduction can be set in two
stages: “slight” (stage 1) and “normal” (stage 2).
This increases patient comfort. Before the next in-
halation phase, the pressure is raised to the thera-
py figure once again.
If apnoea or valid flow limitations occur while the
patient is sleeping, the softPAP mode is automati-
cally deactivated for the relevant period. If the res-
piratory frequency is too high, the softPAP mode is
also temporarily deactivated. However, the thera-
py pressure remains reduced during this period.
The device also records a respiratory flow signal
that can be output to a PSG system or read off with
the aid of SOMNOsupport. SOMNOsoft + recog-
nises apnoea, hypopnoea and respiratory flow
limitations. This permits efficient therapy control.
The exhalation system in front of the mask prevents
accumulation of CO2-enriched expired air in the
tube system.
An automatic Softstart system is provided to enable
the patient to go to sleep more easily. When this
is switched on, the pressure is reduced to the Soft-
start pressure set by the physician. The therapy
pressure then gradually increases to the set value.
The period for the pressure rise can be set in 5-
minute steps between 0 and 30 minutes. The auto-
matic Softstart system can be locked out by the
physician.
Auto switch-on can be activated on the
SOMNOsoft + The device can then be switched
on by breathing into the mask. If there is no pres-
sure for about 5 seconds (e.g. because the mask
is taken off), SOMNOsoft + switches off automati-
cally.
Following a power failure and resumption of the
power supply, the status of SOMNOsoft + is the
same as it was before the power failure. The
stored data remain preserved.

10 Servicing
3. Servicing
3.1 Intervals
The two filters 45 and 46 need to be checked regularly for soiling.
•Coarse dust filter 45 must be changed every 6
months.
• Fine filter 46 must be changed at least every
250 operating hours.
• The pressure measurement tube 11 must be
changed at least every 6 months – and more
frequently if soiling is heavy.
For hygiene reasons we recommend:
•replacing the complete mask system every 6 to
12 months depending on soiling, and
•replacing the expiration system in accordance
with the relevant operating instructions.
See the section on “Cleaning” in the relevant
operating instructions.
The following preventive maintenance measures must also be carried out:
1. Service after every 5000 operating hours
(service symbol 23 appears in display and
must be reset after every service).
2. Service after a maximum of 2 years (see
service label on back of device).
3. The parts exposed to the air flow must be
cleaned every 10,000 hours or 4 years.
4. Every 2 years the battery on the Smartboard or
Softboard must be replaced.
After every service, replace the service label 87
with one bearing the new data (see “9. Spare
parts” on page 46). Use a hole punch or nail
scissors (V-shaped notch) to mark the month. Affix
the new service label to the left of the filter cover.
3.2 Filter change
3.2.1 Coarse dust filter
1. To ensure that no water runs into the device 1
when changing the filters, disconnect the
humidifier 35 from the device. Also observe
the operating instructions supplied.
2. Slightly raise the rear of the device or push the
back of the device off the edge of the table a
little, so that you can reach under the filter
cover 29.
87

Servicing 11
3. Press with your thumb on the underside of the
filter cover 29 and lift the cover off.
4. Pull out the coarse dust filter 45 with your
finger.
5. You can wash a soiled coarse dust filter in
clean water and reuse it after drying
thoroughly.
6. Insert the clean coarse dust filter 45.
7. Insert the filter cover 29 in the opening in the
housing with its upper edge first.
8. Using a finger to press in the catch on the
underside of the cover, fit the cover so that it
clicks into place.
9. If appropriate, fit the humidifier. Observe the
section “3.4 Humidifier” in the operating
instructions.
3.2.2 Fine filter
1. Remove the coarse dust filter 45 as described
under “3.2.1 Coarse dust filter”.
2. Remove the fine filter 46.
The fine filter must be changed if it has turned dark
grey, and in any case after 250 operating hours.
In the latter case the filter change symbol
appears.
3. Insert the new filter and filter cover 29 in
reverse order.
4. To clear the filter change symbol, hold down
the on/off button 24 when switching on the
device until the symbol disappears from the
display.
If the fine filter is changed because of soiling
before 250 operating hours are reached, the hour
counter must be reset to zero:
5. To do so, hold down the On/Off button 24
when switching on the device. After about 3
seconds the filter change symbol lights up and
after another 3 seconds it disappears. Now
you can release the button.
3.3 Cleaning the device
The parts exposed to the air flow must be cleaned
and disinfected every 10,000 hours or every 4
years. This must be done as described in Chapter
“4.3 Cleaning and disinfecting on change of
patient” on page 13.
After every service a test must be performed in
accordance with Chapter “5. Test the device” on
page 15.
29
45
46 45

12 Servicing
3.4 Resetting the service symbol
After every service/repair the service hours counter must be reset to “0”, and the service symbol 23 in the
display must be cleared. A new service label (current year + 2 years) must also be affixed to the back of the
device.
1. To reset the service hours counter to “0” or to
switch off the service symbol, hold down the
Softstart button 26 with the device switched off
until A0/A1 or soft0/soft1/soft2
appears in the display.
2. Now press the On/Off button 24 as well until
an S(for “service key”) appears.
3. Now release both buttons.
4. Briefly pressing the On/Off button 24 clears
the service key. If you want set the service
symbol again, press the On/Off button 24
again.
3.5 Disposal
Do not dispose of the device with
domestic waste. To dispose of the device
properly, please contact a licensed,
certified electronic scrap disposal
merchant. This address is available from
your Environment Officer or from your
local authority.
24
23
26
P
ini
2426 2523
SOMNOsoft +
1 hPa 1 cmH2O
23
26
24

Hygienic preparation 13
4. Hygienic preparation
4.1 Cleaning and disinfecting after use
Caution!
This point is described in Chapter 5 “Cleaning and Disinfection” of the SOMNOsmart 2, SOMNOset or
SOMNOsoft + operating instructions.
Hygienic preparation of the device after repairs and for a new patient is described below.
4.2 Cleaning and disinfection after repair
In the event of repairs the following work should be performed by the qualified dealer.
Caution!
Be sure to follow the disinfectant manufacturer’s
instructions (8.3, page 45). You are
recommended to wear suitable gloves (e.g.
household or disposable gloves) during
disinfection procedures.
•Wipe outside of device and power cord with
TERRALIN disinfectant.
•Clean hoses, cap and mask as described in the
operating instructions or replace with new parts
(depending on condition).
• Open device as described in 7.2.
•Replace the coarse dust filter and fine filter 45
+ 46 as described in Chapter 3.2.
• Clean the inside of the device and filter
housing with a vacuum cleaner. Thoroughly
clean any specially dirty parts.
• Close device as described in 7.3.
4.3 Cleaning and disinfecting on change of patient
When making the device hygienic for a new patient, the following steps must be carried out:
Caution!
Be sure to follow the disinfectant manufacturer’s
instructions (8.3, page 45). You are
recommended to wear suitable gloves (e.g.
household or disposable gloves) during
disinfection procedures.
•Wipe outside of device and power cord with
TERRALIN disinfectant. Dispose of hose and
mask system and carrying bag, and replace
with new parts.
• Open device as described in Chapter 7.2.
• Clean the inside of the device and filter
housing with a vacuum cleaner. Thoroughly
clean any specially dirty parts.
•Replace the coarse dust filter and fine filter 45
+ 46 as described in Chapter 3.2.
•Spray-disinfect device outlet 7, filter holder 44
and filter cover 29 twice with “MIKROZID
LIQUID”, taking care to wait for the prescribed
disinfection time in each case. At the
beginning of the disinfection time, also wipe
the accessible surfaces with a cloth moistened
with “MICROZID LIQUID”.
Caution!
No disinfectant residues must be left in the
pressure measurement stub of the device outlet
port 7; if necessary the pressure measurement
stub must be blown dry.
• Replace OPS delivery tube 61 (only
SOMNOsmart 2 and SOMNOset).

14 Hygienic preparation
• Open box 62/63 as described in Chapter
7.14.
• Replace both labyrinths 64 and 66, motor
frame 65, box damper insert 69 and cover
damper insert 68. Remove fan cap from fan.
•Spray-disinfect the box, fan and fan cap twice
with “MIKROZID LIQUID”, taking care to wait
for the prescribed disinfection time in each
case. At the beginning of the disinfection time,
also wipe the accessible surfaces with a cloth
moistened with “MICROZID LIQUID”.
• Spray-disinfect fan blade twice with
“MIKROZID LIQUID”. The fan blades must not
be exposed to any mechanical forces.
• Dip-disinfect connecting tube 59 mit
“GIGASEPT FF”.
• Close box 62/63 again as described in
Chapter 7.14.
•Alternatively, box 62/63 can be replaced by
an exchange box (see “7.13 Replacing
Smartbox/Comfortbox” on page 35).
•Close appliance as described in Chapter 7.3.
Wipe housing and power cord with TERRALIN
disinfectant.
•Set service symbol and clear it again, to reset
the service hours counter to “0” (see “3.4
Resetting the service symbol” on page 12).
• Test the device.
• Use SOMNOsupport to clear the patient data
stored in the device. Observe the relevant
operating instructions.
4.4 Cleaning and disinfecting the SOMNOclick/SOMNOclick 300
after use
This point is described in Chapter 4 “Cleaning and Disinfection” of the SOMNOclick or SOMNOclick 300
operating instructions.
4.5 Cleaning and disinfecting the SOMNOclick/SOMNOclick 300
on change of patient
When making the device hygienic for a new patient, the following steps must be carried out:
•For hygiene reasons we recommend replacing
the plastic parts after a maximum of 2 years’
use. The spare parts list can be found in the
SOMNOclick/SOMNOclick 300 operating
instructions (WM 16719).
•If plastic parts and heating element are badly
soiled or covered with lime scale, offer the
customer a new device, otherwise:
Proceed as described in Chapter “4. Hygienic
preparation” of the SOMNOclick/
SOMNOclick 300 operating instructions
(WM 16719).

Test the device 15
5. Test the device
5.1 General
Important
A test is required after every service or repair.
Please enter the following figures in your service
record sheet (see Page 53):
For SOMNOsmart 2: operating hours, humidifier
level, Softstart time and Softstart initial pressure,
and the patient’s pressure limits and pressure rise
rate as shown in the patient pass.
For SOMNOset:operating hours, humidifier level,
Softstart time and Softstart initial pressure, and the
patient’s pressure limits and pressure rise rate as
shown in the patient pass, and also the mode.
For SOMNOsoft +:operating hours, humidifier
level, Softstart time and Softstart initial pressure,
CPAP pressure and mode.
If the test reveals faults or deviations from the
specified values, the device must not be used
again until the faults are rectified.
To find out what may be causing the faults and
how to remedy the malfunction, see Chapter „6.
Troubleshooting“ on page 20.
5.2 Performing the check
5.2.1 Checking the power cord
1. Check the power cord 3.
Make sure that
– the insulation is sound,
– the cable is undamaged,
– there are no loose connections.
2. If necessary, change the power cord 3.
5.2.2 Checking the housing
Check the general condition of the housing.
–If the housing is damaged or faulty, replace
the relevant side of the device (see „7.15
Replacing lower part of housing“ on
page 41 or „7.16 Replacing upper part of
housing“ on page 42).

16 Test the device
5.2.3 Checking display
1. Check that the fascia film of the control panel
5is flat all over and firmly in place. If it is not,
replace the fascia film (see “7.5 Replacing the
fascia film” on page 26).
2. Now fix up the power supply by connecting
one end of the power cord 3to the device and
the other to the wall socket.
3. Press the On/Off button 24. The LC display 21
appears.
4. Briefly open and close the device outlet port.
The LC display changes.
5. Switch off the device with button 24. The day’s
therapy duration appears briefly in the LC
display 21. Then only “0” is left showing on the
LC display 21.
5.2.4 Checking pressure and button functions
1. Assemble the device ready for use with hose
system 12, mask 14 and power cord 3
attached.
Note:
If the SOMNOset is in Autotitration or Pressure
Profile mode, switch to APAP or CPAP.
2. With the device switched off, press the
Softstart button 26 repeatedly until the current
auto switch-on setting (A0 or A1) appears in the
display.
Note:
if the exhalation relief setting (soft0/soft1/
soft2) appears in the display, first press the
humidifier button 27 to switch to the auto
switch-on setting.
3. If necessary, press the On/Off button 24 to
change the setting to A1.
– The device will now be switched on
automatically as soon as breathing through
the mask starts (pressure > 0.5 hPa),
–When the mask is removed, the device must
switch off after 5 seconds.
4. The day’s therapy duration appears briefly in
the LC display 21. After that, only “0” is left
showing on the LC display 21.
5. Press the On/Off button 24 to switch the
device on. For 3 seconds the display shows
the total use time 17.
6. Close the opening of the mask, e.g. with your
thumb or hand, and hold it closed.
26 24215
24
21
26
27
P
ini
2426 25
21
27
SOMNOsoft +
1 hPa 1 cmH2O
26
24
2721

Test the device 17
7. If Softstart is switched on, switch it off by
pressing button 26. The radial fan delivers air
through the hose system to the mask, and the
current pressure in hPa is shown in the LC
display 21.
8. Compare the pressure shown in the LC
display 21 with the prescribed minimum
pressure limit. After approx. 1 minute the
difference must be not more than ± 0.2 hPa.
9. Use a pressure gauge to check the set pressure
at the connection stub of the mask.
– To do so, remove one stopper.
– Connect a pressure gauge to the open
connection stub.
Compare the reading with the figure shown on
the LC display 21. After approx. 1 minute the
difference must be not more than ± 0.4 hPa.
10. Press button 26 to switch on Softstart. The
Softstart symbol 16 appears and the LC
display 21 shows the Softstart time. At the
same time the pressure is reduced to the initial
Softstart pressure.
The Softstart function can be locked out by the
physician. In that case the Softstart initial
pressure shown in the display is “– –”.
Stopper
24
21
26
16
P
ini
242621
16
SOMNOsoft +
1 hPa 1 cmH2O
26
24
16
21

18 Test the device
5.2.5 Checking OP signal (SOMNOsmart 2 and SOMNOset)
Measuring equipment required:
• ESD workplace,
• Multimeter,
• PSG connecting cable, WM 23976,
• Operating instructions for PSG connecting cable, WM 16250.
Important
Auto switch-on must be deactivated.
1. Use SOMNOsupport to assign the OP signal
to channel 1.
2. Insert the Western plug W of the PSG
connecting cable in port 4of the device.
3. Connect the pair of wires marked Oto the
multimeter. The insulated wire 6is the plus pole
for the oscilatory pressure (OP), the bare wires
5are the earth.
4. Select a suitable measuring range on the
multimeter, e.g. 0 – 2 V DC.
5. Switch on the device at the On/Off switch 24.
6. With the mask open, the voltage measured
must be ≤0.3 V DC.
With the mask closed (use your hand to hold
it closed), the voltage measured must be
≥0.4 V DC.
If no OP signal can be measured, remove the
battery from the device (see “7.9 Replacing
battery on Smartboard or Softboard” on
page 31) for a few minutes, then put it back.
Perform the measurement again. If there is still
no measurable OPS, the Smartboard must be
replaced.
7. Switch off the device at the On/Off switch 24.
6
T O
5 1
W5

Test the device 19
5.2.6 Checking function of humidifier
1. Make a visual inspection of the plastic
housing:
If there are any cracks/damage or heavy
soiling, the plastic parts or seals must be
replaced.
2. Fill the humidifier up to the mark with water.
3. Check that the humidifier is not leaking.
4. Pour the water out.
5. Now pour in 50 ml water.
6. Click-fit the humidifier to the therapy device.
7. Insert the red drying adapter (supplied with the
therapy unit) in the outlet connection stub of the
humidifier.
8. Push the hose system onto the drying adapter.
9. Switch on the therapy appliance.
10. Switch on the humidifier by pressing the
Humidifier button on the therapy device.
11. Select heating level 6 on the therapy device.
12. Check that the humidifier is heating up.
13. Remove the hose system by pressing the
adapter release catch.
14. Remove the red drying adapter from the
humidifier by twisting it slightly.
If servicing was completed successfully, reset the
service symbol (see “3.4 Resetting the service
symbol” on page 12).

20 Troubleshooting
6. Troubleshooting
Fault Cause Rectifying faults
No running noise,
”Standby” and
”Operating” indicators
do not come on.
No power supply.
Check connection between power cord and device or socket.
Check power supply with a different device (e.g. lamp). If
necessary, replace power cord.
Fuse has blown. Replace fuse (Chapter 7.6, page 26).
Transformer defective. Replace transformer (Chapter 7.10, page 31).
Display board defective Replace displayboard (Chapter 7.4, page 25).
Smartboard or Softboard
faulty. Replace Smartboard or Softboard (Chapter 7.8, page 30).
Powerboard defective. Replace Powerboard (Chapter 7.7, page 27). Send defective
Powerboard to manufacturer for fault analysis.
No running noise after
”Operating” indicator
comes on.
Motor not turning.
Replace Powerboard (Chapter 7.7, page 27). Send defective
Powerboard to manufacturer for fault analysis.
Replace fan (Chapter 7.14, page 36).
Transformer defective. Replace transformer (Chapter 7.10, page 31).
Fuse has blown. Replace fuse (Chapter 7.6, page 26).
Faulty display or none at
all. Display defective. Replace displayboard (Chapter 7.4, page 25).
Tolerance of therapy
pressure is >0.4 hPa after
1 minute.
Smartboard or Softboard
faulty. Replace Smartboard or Softboard (Chapter 7.8, page 30).
Device cannot be
switched on by breathing
into mask in Automatic
mode.
Automatic mode not
active.
Activate auto switch-on
(see 4.1. of operating instructions).
SOMNOset only:
Autotitration or Pressure
Profile mode active.
Auto switch-on is not available in these modes. (See
“Supplementary Operating Instructions for Medical Staff
SOMNOset”).
Powerboard defective Replace Powerboard (Chapter 7.7, page 27).
Smartboard or Softboard
faulty. Replace Smartboard or Softboard (Chapter 7.8, page 30).
Device runs, but does not
reach lower pressure
limit.
Filters soiled. Change both filters (Chapter 3.2, page 10).
Leak in mask. Adjust cap and/or headstraps so that mask is a firm fit.
Device does not switch
off 5 seconds after mask
is removed.
Auto switch-on mode not
activated Activate auto switch-on (see section 4.1 of operating instructions).
SOMNOset only:
Autotitration or Pressure
Profile mode active.
Auto switch-on is not available in these modes. (See
“Supplementary Operating Instructions for Medical Staff
SOMNOset”).
Filter change indicator
comes on. Filters soiled. Clean or change both filters (Chapter 3.2, page 10).
Service symbol comes
on
Have device serviced as soon as possible by Weinmann or an
authorized dealer.
Error message “Err b” in
display
Battery on Smartboard/
Softboard run down,
Internal clock data not
plausible
Replace battery on Smartboard/Softboard (Chapter 7.9,
page 31) and reset date/time.
Internal clock data not
plausible
Replace Smartboard/Softboard (Chapter 7.8, page 30) and
reset date/time.