Weinmann homecare SOMNOcomfort 2 Setup guide

CPAP Units:
SOMNOcomfort 2
SOMNOcomfort 2 WM 24400 / WM 24465
SOMNOcomfort 2 with SOMNOaqua WM 24450 / WM 24420
SOMNOcomfort 2e
SOMNOcomfort 2e WM 24405
SOMNOcomfort 2 e with SOMNOaqua WM 24455
autoCPAP Units:
SOMNObalance
SOMNObalance, white WM 27400
SOMNObalance, white with SOMNOaqua WM 27440
SOMNObalance, anthracite WM 27410
SOMNObalance, anthracite with SOMNOaqua WM 27450
SOMNObalance e
SOMNObalance e WM 27420
SOMNObalance e with SOMNOaqua WM 27460
Servicing and Repair Instructions

2
Content
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Description of the equipment . . . . . . . . . . . . . 8
2.1 Intended use SOMNO comfort 2 and
SOMNO comfort 2e . . . . . . . . . . . . . . . 8
2.2 Intended use SOMNO balance and
SOMNO balance e . . . . . . . . . . . . . . . 8
2.3 Functional description SOMNO comfort 2
and SOMNO comfort 2e . . . . . . . . . . . 9
2.4 Functional description SOMNO balance
and SOMNO balance e . . . . . . . . . . . . 9
3. Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Intervals . . . . . . . . . . . . . . . . . . . . . . 10
3.2 Filter change . . . . . . . . . . . . . . . . . . . 11
3.3 Reset service symbol . . . . . . . . . . . . . . 12
3.4 Disposal . . . . . . . . . . . . . . . . . . . . . 12
4. Cleaning and disinfecting instructions . . . . . 13
4.1 Cleaning and disinfecting while in use . . 13
4.2 Cleaning and disinfecting during
repairs . . . . . . . . . . . . . . . . . . . . . . . 13
4.3 Cleaning and disinfecting, new patient . 13
4.4 Cleaning and disinfecting the
humidifier while in use . . . . . . . . . . . . 14
4.5 Cleaning and disinfecting the
humidifier, new patient . . . . . . . . . . . . 14
5. Final test . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1 General . . . . . . . . . . . . . . . . . . . . . . 15
5.2 Performing the test . . . . . . . . . . . . . . . 15
– Preparation
– Checking the power supply cable
– Checking the power supply
– Checking the housing
– Checking the control panel and
indicators
– Checking proper functionality of the
therapy unit
– Checking proper function of the
humidifier
6. Troubleshooting . . . . . . . . . . . . . . . . . . . . . 19
7. Repair information and repair instructions . . 21
7.1 General . . . . . . . . . . . . . . . . . . . . . . 21
7.2 Tools and facilities . . . . . . . . . . . . . . . 21
7.3 Sequence of repairs . . . . . . . . . . . . . .22
7.4 Opening the unit . . . . . . . . . . . . . . . .23
7.5 Closing the unit . . . . . . . . . . . . . . . . .24
7.6 Replacing the main circuit board . . . . .25
7.7 Replacing the front panel foil . . . . . . . .26
7.8 Replacing the fuse . . . . . . . . . . . . . . .27
7.9 Replacing the display . . . . . . . . . . . . .27
7.10 Replacing the baffle box . . . . . . . . . . .28
7.11 Replacing the fan. . . . . . . . . . . . . . . .30
7.12 Replacing the housing, lower part. . . . .31
7.13 Replacing the housing, upper part. . . . .31
8. Replacement parts . . . . . . . . . . . . . . . . . . . 33
8.1 Replacement parts list . . . . . . . . . . . . .33
8.2 Replacement parts required for
servicing . . . . . . . . . . . . . . . . . . . . .35
9. Tools, testing equipment and disinfectants . . 36
9.1 Tools. . . . . . . . . . . . . . . . . . . . . . . .36
9.2 Testing equipment . . . . . . . . . . . . . . .36
9.3 Disinfectant. . . . . . . . . . . . . . . . . . . .36
10. Technical data . . . . . . . . . . . . . . . . . . . . . . 37
10.1 Specifications for SOMNOcomfort . . . .37
10.2 Specifications for SOMNObalance . . .39
10.3 Pneumatic diagram . . . . . . . . . . . . . .40
10.4 Electrical block diagram . . . . . . . . . . .40
10.5 Safety distances for SOMNOcomfort 2
and SOMNOcomfort 2e . . . . . . . . . .41
10.6 Safety distances for SOMNObalance
and SOMNObalance e . . . . . . . . . . .41
11. Service record . . . . . . . . . . . . . . . . . . . . . . 42
© 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
The objective of these servicing and repair
instructions is to allow you, as a well-trained and
knowledgeable specialist to become acquainted
with the functionality, technical specifications,
servicing and repair of SOMNOcomfort 2 and
SOMNOcomfort 2e as well as SOMNObalance
and SOMNObalance e. This will enable you to
efficiently train customers, repair malfunctions
independently and to perform required servicing
checks as defined in this servicing and repair
instructions; it will also prepare you to perform any
resulting adjustments.
In the event of a warranty claim, send the
devices to WEINMANN.
In order to handle warranty or goodwill requests
we will require you to submit proof of purchase
(invoice) of the customer.
Repair and servicing work must be performed by
Weinmann or knowledgeable, well trained
specialists.
Any repairs not carried out by a qualified service
engineer are your responsibility and may invalidate
the warranty!
When performing servicing, only genuine Weinmann
replacement parts should be used.
Please consider:
Your customers trust in your capabilities just as
much as you place your confidence into
Weinmann.
Note:
The following information is to be found in the units instructions for use:
•Safety instructions
•Setup of equipment
• Operation
• Hygienic preparation
• Warranty

4Overview
H
HiTRON
electronics
corporation
MODEL:XXY78-12345-c
PowerSupplyforMedicalUseonly
100-240V~
1.OA
60/50Hz
24V---2.1
InputOutput
CE
1. Overview
13 Humidifier activated
SOMNOcomfort 2/SOMNOcomfort 2e/SOMNObalance/SOMNObalance e
2Power supply
cable
9Breathing tube
10 Exhalation system
7Unit outlet
6Serial interface
12 Head gear
5Cover
11 Mask
8Adapter
14 Service symbol
15 Softstart time 16 Automatic switch on/off
18 Therapy pressure
17 Change filter symbol
21 Humidifier button
20 Softstart button
19 On/off switch
(stand-by)
22 Filter compartment cover,
air inlet
27 Rating plate 26 Supply connection
23 Carry case
24 DC adapter
1Bacteria filter
25 O2connection valve
3Power supply
4Humidifier

Overview 5
Legend
1 Bacteria filter (accessory)
Used to protect the patient from bacteria, particularly if the unit is being used by a
number of patients.
2 Power supply cable
Connects the power supply to the mains supply.
3 Power supply
Used to supply power to the unit.
4 Humidifier
Used to heat and humidify the air flow created by the therapy unit.
5 Cover
Connects the unit outlet with the humidifier connection. Is required if a humidifier is not
being used.
6 Serial interface
Connects the unit in order to display or evaluate therapy data or to connect the O2-
connection valve.
7 Unit outlet
The air flows from here via the breathing tube and mask to the patient.
8 Adapter
Connects the breathing tube to the unit outlet.
9 Breathing tube
The air flows through the breathing tube to the mask.
10 Exhalation system (accessory)
Exhalation air containing carbon dioxide is diverted here during the therapy.
11 Mask (accessory)
The mask is used to provide the patient with air at the required therapy pressure.
12 Head gear (accessory)
Helps locate the mask correctly and securely.
13 Humidifier activated
This symbol appears when the humidifier is in operation. The current humidity level is
displayed.
14 Service symbol
This symbol will appear after 5000 operating hours (SOMNOcomfort 2,
SOMNObalance) or 10.000 operating hours (SOMNOcomfort 2e,
SOMNObalance e). The unit must then be serviced.
15 Softstart time
This symbol appears when the softstart time is set or the softstart is activated.
16 Automatic switch on/off
The symbol "A" (automatic) appears when the Automatic switch on/off is active. The
symbol "M" (manual) appears when the Automatic switch on/off is inactive.
17 Change filter symbol
This symbol appears every 250 operating hours. The fine filter must then be changed.
18 Therapy pressure
The therapy pressure is shown in hPa. 1 hPa = 1 mbar = 1 cm H2O.
19 On/off switch (stand-by)
Switches the therapy unit on and off.
20 Softstart button
Activates the softstart or sets the softstart time (5 - 30 minutes in 5 minute steps).
21 Humidifier button
Activates the humidifier or sets the humidifier level (6 levels).
22 Filter compartment cover, air inlet
Covers and securely locates the coarse and fine dust filters.

6Overview
23 Carry case
For carrying the therapy unit.
24 DC adapter (accessory)
For operating the therapy unit via a DC socket (12 - 24 V).
25 O2connection valve (accessory)
For introducing oxygen into the mask.
26 Supply connection
This is the connection for the external power supply or DC adapter.
27 Rating plate
Provides information about the unit, e.g. serial number and year built.
Special markings on the unit
Symbol Meaning
SOMNOcomfort 2/SOMNOcomfort 2e/SOMNObalance/SOMNObalance e:
Unit inlet: allows air at room temperature to enter
Unit outlet
SOMNOcomfort 2/SOMNObalance: air escapes with
4 - 18 hPa
SOMNOcomfort 2e/SOMNObalance e: air escapes with
4 - 20 hPa
Side connection socket:
SOMNOcomfort 2/SOMNOcomfort 2e
connection for setting the therapy parameters with SOMNOadjust
WM 23930 and SOMNOsupport WM 23975 by specialist staff
or to control the O2connection valve, WM 24042. Max. current
consumption 163 mA.
SOMNObalance/SOMNObalance e
Serial port for setting therapy parameters using SOMNOadjust
WM 23930 or SOMNOsupport WM 23975 and for specialist
staff to read out raw data on the course of therapy for up to 180
therapy nights or for controlling O2supply valve WM 24042.
Max. current consumption 163 mA. Analog output for therapy
pressure, flow, loss flow, relative respiratory minute volume and
OPP (obstructive pressure peaks) (0 to 1 V DC).
Year built
Unit type B
Do not dispose of the unit as domestic waste.
SN Unit serial number
Unit of protection class II
SOMNOaqua (optional)
Do not use the humidifier on patients whose airways have been
bypassed.
Unit is hot. Do not touch the heater rod.

Overview 7
Markings on the packaging
Symbol Meaning
SOMNOcomfort 2/SOMNOcomfort 2e/SOMNObalance/SOMNObalance e:
SN Unit serial number
Unit of protection class II
Permitted temperature for storage: - 40˚C to + 70˚C
% 0-95 Permitted humidity for storage: max. 95% relative humidity.

8Description of the equipment
2. Description of the equipment
2.1 Intended use SOMNOcomfort 2 and SOMNOcomfort 2e
SOMNOcomfort 2 and SOMNOcomfort 2e are CPAP-Therapy units for the treatment of sleep related
respiratory disorders.
•SOMNOcomfort 2/SOMNOcomfort 2e
creates continuous positive airway pressure
(CPAP).
• While sleeping, the patient’s airways are
stabilized by the applied pressure.
• Air pressure is administered by means of a
breathing mask.
•SOMNOcomfort 2/SOMNOcomfort 2e can
be used for patients age 12 and up.
Important!
SOMNOcomfort 2/SOMNOcomfort 2e can
only reliably prevent airway closure when the
CPAP pressure prescribed by a doctor for the
specific patient has been calculated, e.g. in a
sleep laboratory. Pressure is set by either using the
SOMNOadjust remote control or
SOMNOsupport at the units front control panel.
SOMNOcomfort 2 and SOMNOcomfort 2e are
not designed for life support.
2.2 Intended use SOMNObalance and SOMNObalance e
SOMNObalance and SOMNObalance e are autoCPAP devices for treating sleep-related respiratory
disorders.
•SOMNObalance/SOMNObalance e
creates positive airway pressure (PAP),
• While sleeping, the patient’s airways are
stabilized by the applied pressure.
•The pressure is administered by a nasal or full-
face mask.
•SOMNObalance/SOMNObalance e can
be used for patients age 12 and up.
•SOMNObalance/SOMNObalance e
detects respiratory events and varies airway
pressure accordingly.
• SOMNObalance/SOMNObalance e can
be operated with or without the
SOMNOaqua respiratory air humidifier.
• SOMNObalance/SOMNObalance e
displays therapy data on the device.
Important!
SOMNObalance/SOMNObalance e can only
reliably prevent airway blockage if the upper and
lower pressure limit prescribed by the doctor on a
patient-specific basis has been determined and set
accordingly, for example in a sleep laboratory.
SOMNObalance and SOMNObalance e are
not designed for life support.

Description of the equipment 9
2.3 Functional description SOMNOcomfort 2 and
SOMNOcomfort 2e
SOMNOcomfort 2 and SOMNOcomfort 2e operate according to the principle of an electrically driven flow
generator, with the pressure level being controlled electronically.
• A fan draws in ambient air via a filter and
conveys it to the unit outlet. From here the air
flows through the breathing tube and the mask
to the patient.
•A pressure sensor measures the pressure at the
unit outlet and shows this in the display. The
microprocessor-controlled flow generator
controls the pressure to the set value and
reduces fluctuations in pressure caused by
breathing.
•A softstart automatic system is installed to help
the patient fall asleep more easily. When the
unit is switched on, the CPAP pressure starts at
the initial pressure selected by the doctor and
is then slowly increased to the setpoint
pressure selected. The time of the pressure
increase can be adjusted between 5 and
30 minutes in 5 minute increments.
• The therapy unit offers an automatic on/off
feature. The unit can then be switched on by
breathing into the mask. If there is no pressure
for approx. 15 seconds (e.g. because the
mask has been removed), it will switch off
automatically.
• The therapy parameters are set by trained
personnel using the remote control system
SOMNOadjust or the evaluation program
SOMNOsupport.
• The therapy unit will automatically save all
settings in the event of a power failure. This
means that the unit does not need to be reset
when power is restored.
2.4 Functional description SOMNObalance and SOMNObalance e
• A fan draws in ambient air via a filter and
conveys it to the unit outlet. From here the air
flows through the breathing tube and the mask
to the patient.
• The exhalation system upstream of the mask
prevents the accumulation of CO2-enriched
exhaled air in the tube system. During sleep,
the patient's airways are braced by the air
pressure generated.
• The pressure in the mask is shown in the
therapy device display. The device determines
a respiratory flow signal which can be output
to a PSG system or also read out using
SOMNOsupport.
• The device analyzes the pressure and
respiratory flow signals and detects respiratory
events (e.g. apneas, hypopneas, flow
limitations and snoring).
• In APAP mode, therapy pressure is
automatically increased in the event of
obstructive respiratory events, but no higher
than the upper pressure limit prescribed by the
doctor. Once the events are over, therapy
pressure is slowly reduced again.
• The device can be operated in APAP and
CPAP modes, in each case with softPAP
exhalation relief as an option.

10 Servicing
3. Servicing
3.1 Intervals
Servicing every 2 years or 5000 operating hours
(SOMNOcomfort 2/SOMNObalance only)
Servicing every 4 years or 10,000 operating hours / change of patient
Following components to be wiped down with disinfectant:
• Unit housing
• Filter compartment cover
• Cover
• Power supply
• Power supply cable
– (see chapter 4., page 13)
Replace filter – (see chapter 3.2, page 11)
Check proper device operation incl. pressure
measuring – (see chapter 5., page 15)
Only if excessive soiling is present:
Clean inside using a vacuum cleaner:
• Unit housing
• Filter compartment cover
Clean areas of extreme soiling.
– Opening the unit (see chapter 7.4, page 23)
– Closing the unit (see chapter 7.5, page 24)
Following components to be wiped down with
disinfectant:
• Unit housing
• Filter compartment cover
• Power supply
• Power supply cable
– (see chapter 4., page 13)
Clean inside using a vacuum cleaner:
• Unit housing
• Filter compartment cover
Clean areas of extreme soiling.
– Opening the unit (see chapter 7.4, page 23)
– Closing the unit (see chapter 7.5, page 24)
• Replace the following parts:
• Baffle box, assembled 53
• Cover 5
• Gasket, fan housing 66
• Foam, lower part 59
• Decoupling tube, outside 50
• Adapter, assembled 8
– (see chapter 7.6, page 25)
Replace filter – (see chapter 3.2, page 11)
Check proper device operation incl. pressure
measuring – (see chapter 5., page 15)

Servicing 11
3.2 Filter change
1. In order to prevent water from entering the
SOMNOcomfort 2/SOMNOcomfort 2e/
SOMNObalance/SOMNObalance e,
detach the humidifier 4from the unit. When
doing so, please refer to the included
instructions for use.
2. Remove the filter compartment 22 cover on the
rear of the unit.
3. Remove the coarse dust filter 68.
4. Remove the fine dust filter 67.
5. Replace the filters and close the cover on the
rear of the unit.
6. Attach the humidifier where applicable. Please
refer to chapter “3.4 Humidifier” of the
instructions for use.
Clear the filter change indicator:
– When switching the unit on, press and hold
the on/off switch 19 until the filter change
indicator goes blank.
Reset the hours meter
If the fine filter was changed due to soiling before
250 operating hours, the hours meter must be reset
to zero. Proceed as follows:
1. When switching the unit on, press and hold
the on/off switch 19.
The filter change indicator will come on after
about three seconds before going off again
after another three seconds.
2. Release the on/off switch.
67 68
22
19

12 Servicing
3.3 Reset service symbol
After every servicing and hygienic preparation the display’s service symbol 14 will have to be reset in order
to reset the service indicator back to 0 hours.
1. To delete the service symbol, ensure the unit is
switched off and press and hold softstart
button 20 until the setting option for Automatic
on/off (SOMNOcomfort 2/
SOMNOcomfort 2e) or the SoftPAP stage
(SOMNObalance/SOMNObalance e)
appears.
2. Now, additionally press the on/off switch 19,
until an S(for “key”) appears.
3. Now release both buttons.
4. SOMNOcomfort 2/SOMNOcomfort 2e:
By pressing the on/off switch briefly 19 the
servicing indicator can be set and deleted.
SOMNObalance/SOMNObalance e:
Briefly pressing on/off switch 19 allows the
servicing code to be set. It is deleted by
pressing softstart button 20.
5. Additionally, a new servicing label should be
attached at the rear of the unit.
SOMNOcomfort 2/SOMNObalance:
Current year + 2
SOMNOcomfort 2e/SOMNObalance e:
Current year + 4.
3.4 Disposal
Do not dispose of the unit as domestic waste. To dispose of the unit properly, please contact a
licensed and certified electronic waste disposal merchant. Names and addresses can be obtained
from your Environmental Officer or municipal authorities.
1920

Cleaning and disinfecting instructions 13
4. Cleaning and disinfecting instructions
4.1 Cleaning and disinfecting while in use
Attention!
You will find appropriate instructions in Chapter 5. “Cleaning and disinfecting instructions” of the instructions
for use SOMNOcomfort 2/SOMNOcomfort 2e/SOMNObalance/SOMNObalance e.
The following describes the cleaning and disinfecting procedures while repairing or transferring the unit to
another patient.
4.2 Cleaning and disinfecting during repairs
During repairs, the following steps are to be performed by the authorized dealer!
Attention!
The instructions of disinfectant manufactures must
be adhered to (9.3, page 36). We recommend
that you wear suitable gloves when disinfecting the
equipment (e.g. household or disposable gloves).
• Disinfect outer housing and power supply
cable by wiping them down with TERRALIN.
• Clean or replace (depending on condition)
breathing tube, headgear and mask
according to the instructions for use.
• Open the unit according to 7.4.
• Replace 68 + 67 coarse- and fine dust filters.
• Vacuum clean inner housing and filter
compartment, clean areas of extreme soiling.
• Close the unit according to 7.5.
4.3 Cleaning and disinfecting, new patient
If the unit is to be disinfected and cleaned in order to transfer it to a new patient, the following steps should
be taken:
Attention!
The instructions of the disinfectant manufactures
must be adhered to (9.3, page 36). We
recommend that you wear suitable gloves when
disinfecting the equipment (e.g. household or
disposable gloves).
• Disinfect outer housing, power supply and
power supply cable by wiping them down
with TERRALIN. Dispose of the bag, breathing
tube and mask system, and replace with new
components.
• Open the unit according to chapter 7.4.
• Vacuum clean inner housing and filter
compartment, clean areas of extreme soiling.
• Replace 68 + 67 coarse- and fine dust filters.
• Cover 5, fan housing gasket 66, foam 59,
decoupling tube 50, adapter 8must be
replaced.
•Baffle box 53 should be replaced according to
chapter 7.10.
• Close the unit according to chapter 7.5.

14 Cleaning and disinfecting instructions
4.4 Cleaning and disinfecting the humidifier while in use
You will find corresponding instructions in chapter 4. “Disinfecting and cleaning instructions” of the
instructions for use SOMNOcomfort 2(e).
4.5 Cleaning and disinfecting the humidifier, new patient
If the unit is to be disinfected and cleaned in order to transfer it to a new patient, the following steps should
be taken:
•For hygiene reasons, we recommend that the
plastic parts are replaced after a maximum of
two years use. The replacement part list can
be found in the instructions for use
SOMNOcomfort 2/SOMNOaqua or
SOMNObalance/SOMNOaqua.
• If plastic components and heater rod are
extremely soiled or encrusted with lime you
should use a new unit, otherwise
proceed according to chapter 4.
“Disinfecting and cleaning instructions” of the
instructions for use SOMNOcomfort 2(e).

Final test 15
5. Final test
5.1 General
Important!
A final test is required after each and every repair.
Please maintain a record of all maintenance and
service work that you perform. We suggest that you
maintain this record on a service record form, as
found on page 34 of this manual. You may photocopy
this page for manual entry, or obtain the manual in
PDF format, display it using Acrobat Reader, complete
it on a PC, and print it.
Enter the following values for SOMNOcomfort 2/
SOMNOcomfort 2e in your service record (see
page 42):
• Operating hours
• Humidity level
• Softstart time and initial pressure
• Patient’s therapy pressure
Enter the following values for SOMNObalance/
SOMNObalance e in your service record (see
page 42):
• Operating hours
• Humidity level
• Softstart time and initial pressure
• Mode
for CPAP: therapy pressure
for APAP: bottom and top pressure limit, rise
speed as per patient record
If you detect errors or deviations from defined
values in the course of your final testing you must
not redeploy SOMNOcomfort 2/
SOMNOcomfort 2e/SOMNObalance/
SOMNObalance e before these errors have been
eliminated. You can determine possible causes of
such errors and recommended countermeasures by
referring to chapter “6. Troubleshooting” on
page 19.
5.2 Performing the test
5.2.1 Preparation
– Assemble the therapy unit ready to use
including breathing tube 9, mask 11, power
supply 3and power supply cable 2.
5.2.2 Checking the power supply cable
1. Check the power supply cable 2.
Make sure that
– insulation is intact,
– the cable is not damaged,
– and that there are no loose connections.
2. Replace the power supply cable 2if
necessary.

16 Final test
5.2.3 Checking the power supply
1. Connect the power supply 3to an available
power source.
– If the LED lights up, the power supply is in
order.
2. Replace the power supply 3if necessary.
5.2.4 Checking the housing
– Check the housing’s general condition.
If the housing is damaged in any way, replace
the respective part of the housing (see also
Chapter 7.12, Page 31 and Chapter 7.13,
Page 31).
5.2.5 Checking the control panel and indicators
1. Make sure that front panel foil of the control
panel is attached flush and tight. If this is not
the case, replace the foil (see chapter “7.7”
on page 26).
2. You should now establish the power supply
by connecting the power supply 3and the
power supply cable 2to the unit and an
available power outlet.
3. Close the opening of the mask, e.g. using your
thumb or hand and hold it closed.
4. Push the on/off switch 19 to switch the device
on.
On the display, the total hours of operation
will be indicated for 3 seconds before the
current measured pressure will appear.
5. Press the Softstart button 20. The display will
change.
6. Switch the unit off using the 19 switch.
The display will show the date and the day’s
length of therapy for a short while.
Subsequently only “0” and “A” or “M” will be
shown.
1921 20

Final test 17
5.2.6 Checking proper functionality of the therapy unit
1. Switch on the therapy unit.
2. Close the opening of the mask, e.g. using your
thumb or hand and hold it closed.
3. If the mask test is activated on
SOMNObalance/SOMNObalance e,
switch it off using button 20. If softstart is
switched on, then deactivate this as well,
likewise using button 20.
The radial fan will transport air to the mask
through the breathing tube, and the display
will show the current pressure in hPa.
4. Compare the pressure shown on the display
with the CPAP pressure prescribed. After
approx. 1 minute the maximum allowable
pressure deviation is ± 0.2 hPa.
5. Replace the masks with pressure measurement
adapter WM 23456 and connect it to an
exhalation system, e.g. WM 23685. Seal the
top opening with the red plug for drying
(WM 23639).
6. Connect the lateral connector to a pressure
measurement device.
7. Switch on the therapy device. If softstart is
active, switch it off using button 20.
8. Compare the value displayed by the pressure
measurement device with the value in the LC
display. After approx. 1 minute the maximum
allowable pressure deviation is ± 1 hPa.
9. Press the 20 button to activate softstart. The
softstart indicator 15 will appear and the
display will show the softstart time.
Concurrently, the CPAP pressure will be
reduced to the set softstart initial pressure.
The initial softstart pressure can be adjusted.
(see chapter “2.3” on page 9).
10. The pressure increases slowly and reaches the
CPAP pressure after the time selected. The
softstart indicator 15 will disappear.
With SOMNObalance/SOMNObalance e,
it is the set bottom pressure limit, not the
prescribed CPAP pressure, which is reached
in APAP mode.
11. Switch the therapy unit off.
12. Press and hold softstart button 20 until the
setting option for Automatic on/off
(SOMNOcomfort 2/SOMNOcomfort 2e) or
the SoftPAP stage (SOMNObalance/
SOMNObalance e) appears. On
SOMNObalance/SOMNObalance e, press
the humidifier button to reach the setting option
for Automatic on/off.
1921 20

18 Final test
13. In order to switch to the “A” setting, push the
on/off button 19.
– The therapy unit will now switch on
automatically when breathing into the mask
(pressure > 0,5 hPa),
– If the mask is removed, the unit should
switch off after approx. 15 seconds.
14. Switch the unit off using the button 19. The
display will show the date and the day’s
length of therapy for a short while.
Subsequently only “0” and “A” will be shown.
5.2.7 Checking proper function of the humidifier
1. Check the plastic housing visually:
if tears/damage or heavy soiling are found,
the plastic parts or gaskets must be replaced.
2. Fill the humidifier up to the mark with water.
3. Check whether the humidifier is leaking.
4. Empty the water.
5. Now pour in about 50 ml of water.
6. Attach the humidifier.
7. Attach the breathing tube to the unit.
8. Switch the therapy unit on.
9. Switch the humidifier on by pressing the
humidifier button on the therapy unit.
10. Set heater level 6 on the therapy unit.
11. Check whether the humidifier is getting
warmer.
12. Remove the breathing tube by pressing the
adapter’s locking button.
1921 20

Troubleshooting 19
6. Troubleshooting
Malfunction Cause Rectification
No mechanical sound, ready
and operating indicator is off.
No power.
Check connections between the power supply
cable and the unit, wall outlet respectively.
Check the power source with another device
(e.g. lamp) if necessary.
If necessary, replace power supply cable.
Fuse defective. Replace fuse (Chapter 7.8, Page 27).
Flat cable connection of the
display has slipped from the
socket.
Check connection to main circuit board
(Chapter 7.6, Page 25).
Supply connection line 64 loose
or defective.
Reattach (Chapter 7.5, Page 24) or replace line
(Chapter 7.12, Page 31).
Main circuit board defective. Replace main circuit board (Chapter 7.6,
Page 25).
If the powerpack’s LED is off:
Power supply defective. Replace powerpack.
No mechanical sound after
operating indicator turns on.
Motor is not turning.
Replace main circuit board (Chapter 7.6,
Page 25).
Replace fan (Chapter 7.11, Page 30).
Fan connection line loose or
defective.
Reattach (Chapter 7.6, Page 25) line or replace
fan (Chapter 7.11, Page 30).
Defective or no display. Display defective. Replace display (Chapter 7.9, Page 27).
Pressure tolerance of the CPAP is
> 1 hPa after 1 minute. Main circuit board defective. Replace main circuit board (Chapter 7.6, Page 25).
Unit will not switch on by
breathing into the mask while in
automatic mode.
Automatic mode switched off. Activate automatic mode (see 4.1 of the
instructions for use).
Main circuit board defective. Replace main circuit board (Chapter 7.6,
Page 25).
Using a full-face mask with
integrated exhalation system.
Automatic on is not an option with this type of
mask (see instructions for use for
SOMNObalance/SOMNObalance e, Section
4.4 "Automatic on/off").
Unit is running but does not
reach CPAP pressure level
selected.
Filter soiled. Replace both filters (Chapter 3.2, Page 11).
Mask leaking. Adjust headgear so that mask is airtight.
Cover or humidifier not attached/
inserted. Insert/attach humidifier or cover.
Pressure measurement tube kinked
or loose.
Attach the pressure measurement tube and close
the unit in a manner avoiding kinks.
Unit does not switch off after
approx.15 seconds once mask
is removed.
Automatic switch on/off not
activated.
Activate automatic mode (see 4.1 of the
instructions for use).
Using a high-resistance mask (e.g.
"nasal pillow" masks).
Automatic off is not an option with this type of
mask.
Filter change indicator on
the display.
Filter soiled, end of filter life cycle
reached.
Clean/change both filters (Chapter 3.2,
Page 11).

20 Troubleshooting
Humidifier water will not warm
up.
Humidifier defective.
Check using another humidifier, if necessary
replace heating rod (see instructions for use
SOMNOcomfort 2/SOMNOcomfort 2e/
SOMNObalance/SOMNObalance e).
Main circuit board defective. Replace main circuit board (Chapter 7.6,
Page 25).
Humidifier connection line 49
loose or defective. Reattach (Chapter 7.6, Page 25) or replace line.
Power supply cable defective. Replace power supply cable.
Err b Back-up battery weak/depleted.
Replace main circuit board (Chapter 7.6,
Page 25).
Err E EEPROM data erased/damaged.
Err S Hardware defective (fuse, motor
driver).
Err c
EEPROM cell containing
calibration data erased/
defective.
Err A Pressure sensor defective.
Err P Hardware defective (pressure
sensor, motor driver).
Err h Hardware defective (humidifier
output stage).
On SOMNObalance/SOMNObalance e
Err10 Calibration fault
Replace main circuit board (Chapter 7.6,
Page 25).
Err20 EEPROM fault
Err30 Pressure sensor fault
Err31 Pressure fault
Err40 Data fault [flash]
Err50 Battery fault
Err60 Speed fault (fan)
Replace main circuit board (Chapter 7.6,
Page 25) and/or replace fan (Chapter 7.11,
Page 30).
Err70 Humidifier fault Replace main circuit board (Chapter 7.6,
Page 25).
Err80 RTC fault
Malfunction Cause Rectification