Apex Digital iX Series User manual

Version History:
Ver.
Revision
Date
Revised Content
Project Code
(ECR、Variation A~D)
Note
1.0
2021.2
New release.
New Release
2.0
2021.5
Add contents and revised Troubleshooting

Table of Contents
CHAPTER 1: Introduction & Intended Use ................................................................................................................................. 4
CHAPTER 2: Warning & Cautions .................................................................................................................................................. 5
CHAPTER 3: Theory of Operation .................................................................................................................................................. 7
CHAPTER 4: Maintenance................................................................................................................................................................. 8
4-1. Cleaning of the Device......................................................................................................................................................8
4-2. Cleaning the Humidifier ...................................................................................................................................................8
4-3. Cleaning the Tubing...........................................................................................................................................................8
4-4. Replace Air Filter .................................................................................................................................................................9
CHAPTER 5: Troubleshooting........................................................................................................................................................10
CHAPTER 6: Component Removal & Installation...................................................................................................................17
6-1. Open the Top cover ........................................................................................................................................................ 17
6-2. LCD Display ........................................................................................................................................................................ 18
6-3. Mainboard..........................................................................................................................................................................19
Applicable Model: iX Fit..................................................................................................................................................... 19
Applicable Model : iX Sense.............................................................................................................................................19
Applicable Model: iX Auto................................................................................................................................................ 22
6-4. 4G & SD Module.............................................................................................................................................................. 25
6-5. Blower & Air path module............................................................................................................................................27
Applicable Model: iX Fit..................................................................................................................................................... 27
Applicable Model : iX Sense / iX Auto.......................................................................................................................... 29
6-6. WIFI Board..........................................................................................................................................................................34
6-7. DC Jack cable..................................................................................................................................................................... 36
Applicable Model : iX Fit / iX Sense / iX Auto............................................................................................................ 36
6-8. Heated Humidifier ........................................................................................................................................................... 37
Chapter 7. Performance Verification...........................................................................................................................................40
7-1. iX Fit / Sense Pressure Calibration ............................................................................................................................. 40
7-2 iX Fit / Sense Pressure Test............................................................................................................................................ 42
7-3 iX Auto Pressure Calibration ......................................................................................................................................... 45
7-4 iX Auto Pressure Test....................................................................................................................................................... 48
7-5 iX Series functional verification.................................................................................................................................... 51
Chapter 8. Reset Total Meter.........................................................................................................................................................56
Applicable Model: iX Sense / iX Fit................................................................................................................................ 56
Applicable Model : iX Auto............................................................................................................................................... 56
Chapter 9. Reset to Default Settings...........................................................................................................................................57
Applicable Model : iX Auto............................................................................................................................................... 57
Applicable Model: iX Sense / Fit..................................................................................................................................... 58
Chapter 10. Service BOM ................................................................................................................................................................59
Service Parts:............................................................................................................................................................................... 59
Applicable Model: iX Fit..................................................................................................................................................... 59
Applicable Model: iX Sense.............................................................................................................................................. 60

Applicable Model: iX Auto (4G with Wi-Fi version) ................................................................................................. 61
Applicable Model: iX Auto（without 4G）................................................................................................................. 63
Applicable Model: iX Heating Humidifier ................................................................................................................... 65
Accessory Parts < For customer optional purchase >................................................................................................... 65
Applicable Model: iX Fit / Sense / Auto....................................................................................................................... 65
Chapter 10. Service Kit.....................................................................................................................................................................68

CHAPTER 1: Introduction & Intended Use
This device is intended to provide continuous positive airway pressure ( CPAP ) for the treatment of adult
Obstructive Sleep Apnea ( OSA ) in spontaneously breathing patients weighing over 30 kg ( 66 lbs. ). It is for
use in the home or hospital / institutional environment.
Product Type
Product Number
iX Fit
9S-010500
iX Sense
9S-010520
iX Sense WI-FI only
9S-015040
iX Auto WI-FI only
9S-010600
iX Auto 4G with WI-FI
9S-010620
iX Heated Humidifier
9S-010800
( iX Auto ) ( iX Sense ) ( iX Fit )
(Heated Humidifier)

CHAPTER 2: Warning & Cautions
NOTE, CAUTION, AND WARNING STATEMENTS
NOTE: Indicates information that you should pay special attention to.
CAUTION: Indicates correct operating or maintenance procedures in order to prevent damage to or
destruction of the equipment or other property.
WARNING: Calls attention to a potential danger that requires correct procedures or practices in order to
prevent personal injury.
DANGER –To reduce the risk of electrocution
1. DO NOT place or store product where it can fall into or be pulled into a bath or sink.
2. DO NOT place or immerse the unit into water or other liquids.
WARNINGS –To reduce the risk of burns, electrocution, fire or injury to the user or operator.
1. THIS DEVICE IS NOT INTENDED FOR LIFE SUPPORT.
2. The airflow for breathing generated by this device may be as much as 5°C (41°F) higher than the room
temperature. This device should not be used if the room temperature is warmer than 35°C (95°F) to
prevent the airflow temperature from exceeding 43°C (109°F) and causing irritation to your airway.
3. This machine should be used only with masks (and connectors) recommended by the manufacturer, or
by your physician or respiratory therapist.
4. Equipment is not suitable for use in the presence of a flammable anesthetic mixture with air or with
nitrous oxide or oxygen.
5. Use this product only for its intended purpose as described in this manual. DO NOT use auxiliary
attachments that are not approved by the manufacturer.
6. Use only Apex Medical Corp. or confirmed by Apex Medical Corp. parts and accessories with the device.
Non-Apex Medical Corp. parts may reduce the effectiveness of the treatment, potential allergic
reactions or damage the device.
7. No modification of this equipment is allowed. If this equipment is modified, appropriate inspection and
testing must be conducted to ensure continued safe use of the equipment.
8. Make sure the environment around the machine is dry and clean. Dust and foreign particles may
affect the treatment. Keep the air inlet on the back of the machine clear to prevent overheating and
damage of the device. Do not place the machine near a source of hot or cold air. Extreme cold or hot
environment may damage the user's respiratory airway.
9. If there is a possibility of electro-magnetic interference with mobile phones, please increase the distance
between devices or turn off the mobile phone.
10. Do not connect the device to the personal computer for data downloading during the treatment. This
may cause the CPAP device failure.
11. Use of this equipment adjacent to or stacked with other equipment should be avoided because it could
result in improper operation. If such use is necessary, this equipment and the other equipment should
be observed to verify that they are operating normally.
12. Use of accessories, transducers and cables other than those specified or provided by the manufacturer of
this equipment could result in increased electromagnetic emissions or decreased electromagnetic
immunity of this equipment and result in improper operation.
13. Sources of oxygen must be located more than 1 m from the equipment to avoid the risk of fire and
burns.

14. Failure to use a mask or accessory that minimizes rebreathing of carbon dioxide or permits spontaneous
breathing can cause asphyxiation.
CAUTION –Reducing the risk of damage to the device.
1. Mobile RF communications equipment can affect medical electrical equipment.
2. Ensure that the SD card sealed cover and filter back cover are both closed whenever any of the
accessories are not installed.
3. Do not use any extension cords with this device.
4. Make sure the filter area at the back of the device is not blocked and check and change the inlet
filter for each specific time (The detail as Chapter 6 Cleaning & Maintenance).
5. Do not install a wet filter into the device.
6. Do not place the device directly onto carpet, fabric, or other flammable materials.
7. Do not place the device in or on any container that can collect or hold water.
8. Tobacco smoke may cause tar build-up within the device, which may result in the device
malfunctioning.
9. Make sure that the DC power cord securely insert into your therapy device before using.
10. Only use APEX Medical Corp. approved DC Power Cord and Adapter. Use of any other system may
cause damage to the device.
11. The equipment must not be covered or positioned in such a way that the operation or
performance of the equipment is adversely affected.
12. Place the device away from sources of heat and moisture to avoid damaging the equipment.

CHAPTER 3: Theory of Operation

CHAPTER 4: Maintenance
4-1. Cleaning of the Device
The device should be checked and dusted regularly at least every 30 days.
1. Pull out the plug from the device.
2. Wipe the outside of device with a cloth dampened with water and mild detergent
3. Device should be air-dried thoroughly before use. Inspect the device and all circuit parts for any
damage after cleaning and replace if necessary.
WARNING
To avoid electric shock, the power cord must be unplugged
before cleaning.
Don’t try to open this device. Repairs and internal servicing
should only be performed by an authorized service agent.
Do not drop any object into the air tube or air outlet.
Do not clean the machine during operation
4-2. Cleaning the Humidifier
The humidifier should be checked and cleaned daily (or after every time use) to prevent the growth of
germs that might affect the user’s health.
1. Wipe the outside of the humidifier with a cloth dampened with water and mild detergent
2. Open the water chamber and discard any remaining water.
3. Wash the water chamber with warm water and mild detergent.
4. Rinse the water chamber and allow drying out of direct sunlight and/or heat. Inspect all parts for
any damage after cleaning and replace if necessary.
4-3. Cleaning the Tubing
The air tubing should be checked and cleaned daily (or after every time use) to prevent the growth of
germs that might affect the user’s health (please also refer to the air tubing instruction manual).
1. Disconnect the air tubing from the air outlet of the device.
2. Wash the air tubing in warm water using mild detergent. Rinse thoroughly, hang, and allow to dry. All
items of the air tubing are subject to normal wear and tear and may eventually be replaced. Replace
the air tubing if they are

CAUTION
Do not use bleach, chlorine-, alcohol-, or aromatic-based, which including all
scented oils, moisturizing or antibacterial soaps to clean the cushion, mask or
air tubing. These solutions may cause hardening and reduce the life of the
product.
Do not wash or dry the mask or air tubing at a temperature above 70°C (158°F)
Do not use any cleaner containing fragrance or conditioners as they will leave
a residue.
4-4. Replace Air Filter
For an optimal operation of the device, the Ultra filter is disposable and should be replaced after 30
nights of use or sooner if it appears dirty; however, depending on the air quality, the replacement time
may vary.
1. Open back cover and remove the dirty filter from the enclosure on the rear of the device.
2. Replace a new filter and close back cover.
WARNING
The Ultra filter is not washable or reusable.
Only APEX-supplied filters should be used as replacement
filters.
Dirty air filter may cause high operating temperatures that
affect device performance.
Disassembly Steps:
Find the position of the filter in the picture and pull out the lid. Remove the filter and replace it.

CHAPTER 5: Troubleshooting
It is necessary to pass the verification from APEX headquarters and get the certificate. Any unauthorized
servicing or repairing will void the warranty of the product
Error Code
Definition
Solution
Error 001
Remove the Humidifier during treatment
1. Do not remove the humidifier
during treatment.
2. Reconnect the heated humidifier
and restart the device.
Error 002
SD communication fail
1-1. Check the SD card format (FAT32).
1-2. Ensure the SD card is inserted into
the slot and the SD card has
enough capacity.
2. Replace the SD module if the
problem remains the same <refer
to 6-4>.
Error 003
Remove the SD card while data is being
processed
1. Do not remove the SD while data is
being processed.
2. Please insert the SD card again and
do not remove it until finished the
process< refer to 7-5>.
Error 004
The Wi-Fi signal is too weak
1. Please put the device closer to AP.
Ensure the device is placed where
there is coverage (i.e., on your
bedside table, not in a drawer or
on the floor). The icon of wireless
should be turned on if the wireless
coverage is good.
2. Check for connection of flat flexible
cable if the problem remains the
same<refer to 6-3>.
3. Replace the Wi-Fi module if the
problem still remains the same
<refer to 6-4>.
Error 005
No Wi-Fi connection
1. Ensure to turn off airplane mode
and Wi-Fi is on.
2. Make sure there is no change in the
IT-network configuration (or Make
sure there are no co-existence
interferes by adding new item/dis

connect item to the connected
IT-network).
3. Check for connection of FFC cable if
above solutions do not work <refer
to 6-3>.
Error 006
Cellular is too weak
1. Ensure the cellular setting is on
<refer to 7-5>.
2. Replace a new 4G SIM card for
testing if the signal still remains
too weak.
3. Check if the Antenna connects to
the 4G module board <refer to
6-4>.
4. Replace the 4G module board if
the problem still remains <refer to
6-4>.
E100-01
Wi-Fi module communication failure
1. Check for connection of FFC cable
if the above solutions do not work
<refer to 6-3>.
2. Replace the Wi-Fi board if the
problem remains the same <refer
to 6-6>.
E100-002
Server can't be connected
1. Restart the device.
2. Enter into the Setting mode and
select About to verify if software
version is displayed <refer to 7-5>.
3. Replace the 4G module if the
problem s remains the same
<Refer to 6-4>.
E100-003
4G module communication failure
1. Ensure the cellular setting is on
and restart the device <refer to
7-5>.
2. Replace a new 4G SIM card for
testing if the signal still remains
too weak.
3. Check if the Antenna connects to
the 4G module board <refer to

6-4>.
4. Replace the 4G module board if
the problem still remains <refer to
6-3>.
E100-004
SIM Card is not plug in
1. Check for if there is any dirt grime
or foreign debris on the 4G
module board.
2. Re-plug 4G SIM card.
E100-007
Humidifier communication fail
1. Check if the heating humidifier
connects properly <refer to 7-5>.
2. Replace the humidifier mainboard
if the problem remains the same
<refer to 6-8>.
E101-01
Abnormal system settings
1. Reset the device.
2. Replace the mainboard if the
problem remains the same<refer to
6-3>.
E101-02
Abnormal motor RPM
1. Check if blower connects to the
mainboard properly <refer to 7-5>.
2. Replace a new blower for testing if
the problem remains the
same<refer to 6-3>.
3. Replace the mainboard if the
problem remains the same<refer to
6-3>.
E101-03
Motor Drive IC communication failure
1. Restart the device.
2. Check if blower properly connects
to the mainboard.
3. Replace the mainboard if the
problem remains the same <refer to
6-3>.
E101-04
Abnormal pressure sensor
1. Check if pressure sensor tube
properly connects and check if any
damage on the pressure sensor
tube.
2. Replace the pressure sensor tube
if the problem remains the same
<refer to 6-3>.
3. Replace the mainboard if the
problem remains the same <refer
to 6-3>.

E101-05
Abnormal flow sensor
1. Check if flow sensor properly
connects and check if any damage
on the flow sensor tube.
2. Replace the flow sensor tube <refer
to 6-3>.
E101-06
Humidifier Overheat -> Abnormal of
Humidifier
1. Replace the heating plate if the
problem remains the same <refer to
6-8>.
2. Replace heating humidifier
mainboard if the problem remains
the same <refer to 6-8>.
E101-07
Abnormal NTC Sensing of Humidifier
1. Check for any damage in cable
connections if the issue from the
heating humidifier.
2. Replace the heating plate if the
problem remains the same <refer
to 6-8>.
3. Replace heating humidifier
mainboard if the problem remains
the same <refer to 6-8>.
E101-08
Heated Tubing Overheat->Abnormal of
Heated Tubing
1. Reconnect the heated humidifier
<refer to 7-5>.
2. Replace the heating plate if the
problem remains the same <refer
to 6-8>.
3. If the problem still remains,
replace humidifier mainboard <
refer 6-8>.
E101-09
Abnormal NTC Sensing of Heated tubing
1. Check for any damage in cable
connections; Replace PCBA
mainboard from heating
humidifier if the problem remains
the same <refer to 6-8>.
2. Replace the heating plate if the
problem remains the same <refer
to 6-8>.
3. Replace the Heated Humidifier if
the problem remains the same.

Low P icon
Low Pressure
1. Make sure the mask is properly fit
on the user’s face.
Check the condition of the tubing
and connect it properly.
Check if pressure & flow sensor
tube connects properly.
2. Check if any damage on the
pressure & flow sensor tube <refer
to 6-3>.
3. Replace the pressure & flow
sensor tube if the problem
remains the same <refer to 6-3>.
4. Replace the mainboard if the
problem remains the same <refer
to 6-3>.
Problem
Possible Cause
Solution
No display or
display incorrect
1. The power cord is not connected to
the power socket.
2. LCD failure or controlled PCB failure.
1. Check for the power cord if it connected to
the power socket.
2. Replace the LCD <refer to 6-2>.
3. Replace the mainboard if the problem
remain the same < refer to 6-2>.
Illuminator
under LCD is not
on
1. Device is in sleep mode
2. LCD failure
1. Make sure the power cord is plugged in,
then press any button/dial, and the LCD
should automatically turn it on.
2. Replace the mainboard or LCD if the
problem still remains it<refer to 6-3>.
Button or Dial
do not work
Button or Dial failure
1. Remove the Dial and reconnect again.
2. Replace the Dial if the problem remains the
same.
Air delivered is
slow.
1. During ramp time.
2. Filter is too dirty.
3. Flow generator failure.
1. Check the ramp time setting.
2. Change the filter regularly < refer to 4-4>.
3. Check if the blower’s wire harness connects
on the main board.
4. Replace the blower if the problem remains
the same < refer to 6-5>.
Date cannot
be copied to
the SD card.
1. SD card is full.
2. SD card is not inserted correctly.
3. Data on the SD card is corrupted.
1. Check if the SD card is provided by APEX or
Check the SD card format <Fat32>.
2. Check if the SD card is full capacity and clear
space for the new data.
3. Format the card. If it does not work, you

might need to use a new SD card.
There is no air
flow through
the mask
1. Device is not turned on or working
correctly
2. Heated tubing is not connected
correctly.
3. Air tubing is blocked.
1. Check the power cord is connected
properly.
2. Reconnect the heated tubing correctly.
3. Unblock the air tubing.
Condensation in
mask or tubing
1. The heating humidifier level setting is
too high.
2. The operating environment or
position of the heated humidifier is not
correct.
3. The setting of heated tubing is not
On.
1. Adjust to low temperature setting.
2. Remove any air conditioner nearby the
heated humidifier or keep room
temperature up near 25°C
3. Adjust the level of the heated tubing
setting until the condensation reduced or
becomes comfortable.
Water Leakage
1. Water chamber is not properly
assembled.
2. Water chamber worn out.
1. Remove the water chamber from the
heated humidifier, pour out the water and
reassemble the water chamber again,
making sure the water chamber closes
securely, and fill the water till it reaches
maximum line and checks if it still leaks or
not
2. Replace with a new water chamber.
Air is leaking
from around
mask or tubing
or device
( Low Pressure )
1. Tubing is damaged.
2. Tubing is not correctly connected.
3. Heating Humidifier is not properly
assembled.
4. Water chamber is not properly
assembled.
5. Mask is not properly connected.
6. User does not wear the mask properly.
1. Check the condition of the tubing and
replace new tubing.
2. Check the tubing connection the air outlet
on the side of the device and the other end
to tubing firmly to the mask.
3. Check the assemble step of heating
humidifier <refer to 6-8>.
4. Check if the water chamber connects
properly to the heated humidifier.
5. Please refer to the videos if how to wear
mask provided by the Apex.
6. Please refer to the Apex YouTube channel
for how to wear mask.
Therapy data
has not been
sent to my care
provider
1. Wireless coverage may be poor.
2. The No wireless connection icon is
displayed on the top right of the
screen no wireless network available..
3. Device may be in Airplane Mode.
4. Data transfer is not enabled for your
1. Make sure that device is placed where
there is coverage (i.e., on your bedside
table, not in a drawer or on the flow). The
icon of wireless should be turned on if the
wireless coverage is good.
2. Make sure there are no co-existence

device.
interfere by adding new item/disconnect
item to the connected IT-network.
3. Turn off Airplane Mode
4. Re-plug and the device will automatically
re-upload data.

CHAPTER 6: Component Removal & Installation
It is necessary to pass the verification from APEX headquarters and get the certificate. Any unauthorized
servicing or repairing will void the warranty of the product.
6-1. Open the Top cover
Applicable Model: iX Fit / iX Sense / iX Auto
Disassembly Steps:
Remove the 4 screws under the bottom and the top cover can be separated.
For insert the 4G card, it needs to remove Start socket screw, which is right beside the 4G-port (This
disassembly step is only applied for iX auto).
Assembly Steps:
According to the disassembly steps, assemble in reverse order.
The tightening torque of bottom electric screwdriver: 4~6 kgf-cm.
The tightening torque of star socket screwdriver: 0.3~1kgf-cm

6-2. LCD Display
Applicable Model : iX Auto
Disassembly Steps:
1. Remove the 4 screws under the bottom and top cover can be separated <Refer to 6.1>.
2. Squeeze both sides of the screen bracket and make 2 buckles under the screen separately.
3. Remove the FFC cable.
Assembly Steps:
1. Make sure the Wi-Fi cable needs to be assembled to the bottom and the FFC cable should be presented
S-shape under the screen.
2. According to the disassembly steps, assemble the LCD displaying in reverse order.
3. The LCD Display connector should be buckle up tightly.

6-3. Mainboard
Applicable Model: iX Fit
Disassembly Steps:
1. Remove the 4 screws under the bottom and top cover can be separated < Refer to 6.1 >.
2. Pull up the mainboard upward and disconnect all the cables from the mainboard (Heating
Humidifier / Blower / DC cord).
Assembly Steps:
1. Connect the blower cable and make sure the loading direction is correct.
2. Connect the heating humidifier cable and DC jack cable.
3. While assembling the mainboard, make sure the 6 ribs should align to the 6 holes which on the
mainboard. Please note that one of the ribs is under the LCD display and pay attention not to lose
the 6 pieces of O-ring due to its light and small.