C-Aire eQuinox PAOS 4000 User manual

eQuinoxTM
Personal Ambulatory Oxygen System (PAOS)TM
Model 4000
PROVIDER TECHNICAL MANUAL

20771733 D 2
General Information................................................................... 3
Warning and Caution Statements...................................................................3
Introduction to the eQuinox Oxygen System........................... 4
eQuinox Oxygen System Specications ................................... 5
Pulse Dose Mode Specications ......................................................................6
Power Accessory Specications........................................................................6
Compressor and Compressor Enclosure.....................................................7
Power Distribution ....................................................................................................7
Control Board ...............................................................................................................7
Continuous Flow Mode .........................................................................................7
Pulse Dose Mode .......................................................................................................7
Pulse Proles .................................................................................................................7
Service Mode Functions........................................................................................8
EDAT ...................................................................................................................................8
Power Supplies............................................................................ 9
AC Power Supply........................................................................................................9
DC Power Cable..........................................................................................................9
Battery Pack ...................................................................................................................9
Charging Algorithm ..............................................................................................11
Introduction ............................................................................. 12
Pre-Delivery Check List........................................................................................12
Adjusting Rise Time ...............................................................................................12
Connecting the AC Power Supply................................................................12
Monthly Maintenance—Patient .............................................. 13
Care for the Battery Pack ....................................................................................13
Calibrating the Battery Pack.............................................................................13
eQuinox Monthly Run-Time Procedure ....................................................13
Annual Maintenance
Procedures .......................................................................... 14
Remove and Replace 9-Volt Battery and
Compressor intake Filter............................................................................14
Assembly and Alarm Verication Tests ......................................................17
Electrical Safety Test .............................................................................................17
Cleaning the eQuinox .........................................................................................17
Provider Service and Maintenance Record.............................................18
Table of Contents
Voice Module Operation .......................................................... 19
Voice Module Operational Instructions....................................................19
Enable/Disable the Voice Module ................................................................19
Increase/Decrease the Volume of Vocal Notications .....................19
Changing Voice Module Language.............................................................19
eQuinox Voice Message Alert Descriptions Table...............................20
eQuinox Voice Message Alert Descriptions............................................20
Troubleshooting, Service, and Repair Procedures................. 21
Alarm Conditions and Alarm Codes ........................................ 22
Malfunction Codes.................................................................... 23
Servicing the eQuinox.............................................................. 25
I. Removing/Replacing the Back Cover.....................................................25
II. Removing/Replacing the Handle and Speaker...............................26
III. Removing/Replacing the Back Cover Foam
and Intake Muer Section.......................................................................26
IV. Removing/Replacing the Compressor Assembly......................27
V. Removing/Replacing the ATF.....................................................................29
VI. Removing/Replacing the Product Tank..............................................30
VII. Removing/Replacing the
Proportional Flow Valve.............................................................................31
VIII. Removing/Replacing the Rubber Gasket Seal.............................31
IX. Removing/Replacing the Top Cover Foam Section....................32
X. Removing/Replacing the Control Board, Power Manager
Board, Voice System Board, Battery Bridge Board,
Membrane Panel and Wire Harness Assemblies........................33
Parts List .................................................................................... 39
Optional Accessories ............................................................................................40
CAIRE Inc. Customer Service Contact Information................. 41
Authorized European Union Representative: ........................ 41

Personal Ambulatory Oxygen System Provider Technical Manual
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General Information
This technical manual will familiarize you with Provider-specic
information regarding the eQuinox Oxygen System. Instructions in this
manual are intended to help ensure that:
• Providers are familiar with eQuinox system components and
system principles of operation
• Providers are given proper guidance in the use of the eQuinox and
its accessories that can be conveyed to patients
• Providers are made aware of the care, diagnostics, maintenance,
and repair of the eQuinox
Warning and Caution Statements
Safety instructions are dened as follows:
WARNING: Important safety information for hazards that might
cause serious injury.
CAUTION Important information for preventing damage to the
eQuinox.
Note: Places emphasis on an operating characteristic or
important consideration.

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Introduction to the eQuinox Oxygen System
AC Power Supply
12VDC Cable
eQuinox Cart
Battery Pack
BACK
Battery
Pack Latch
Exhaust
Vent
Battery
Pack
Service Cabinet
FRONT
Control
Panel
Handle
External Power
Receptacle
Oxygen Outlet
Port
FAA
Approval Icon
Rating Label &
Serial Number
Location
Air inlet
Filter
eQuinox

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eQuinox Oxygen System Specications
Dimensions (H x W X D) 13.6 x 10.6 x 7.4 (inches)
(34.5 x 26.9 x 18.8 cm)
Weight
eQuinox
Battery Pack
12.2 lbs (5.53 kg) unit only
14.0 lb (6.35 kg) w/ 12-cell battery installed
12 Cell Battery Pack - 1.85 lbs (0.84 kg)
24 Cell Battery Pack - 3.6 lbs (1.63 kg)
Flow Settings
Continuous Flow (measured in Liters Per Minute LPM)
Pulse Dose (measured in mL)
0.5 to 3.0 LPM (0.5 liter increments)
Settings 1.0-6.0: 16-96mL (8mL increments)
Settings 7-9: 128mL, 160mL, 192mL
Continuous Flow Accuracy +/- 10% or 200ml/min, whichever is greater
Oxygen Concentration 90% (+5.5/-3%) for all ow settings
Maximum System Pressure 15 psig (103.5 kPa)
Oxygen Output Pressure 5.0 psig (34.5 kPa) nominal
Oxygen Concentration
Status Indicator
Green Light = Normal Operation
Yellow Light = Warning or Caution, less than 85% ± 3%
Red Light Flashing = Abnormal Operation, less than 70% ± 5%
Nominal Sound Level
3.0 LPM Continuous Flow
0.5 LPM Continuous Flow
46 dB(A)
40 dB(A)
Operating Environment
Temperature (Unit ONLY, without Battery Pack)
Humidity
32º F to 104º F (0° to 40°C)
10% to 95%, Non-condensing, 82.4°F (28°C) Maximum Dew point
Storage Environment
Temperature
Temperature (Battery Pack)
Humidity
-4º F to 140º F (-20° to 60°C)
-4°F to 122°F (-20° to 50°C)
Up to 95% Non-condensing
Altitude Operating Range -1254 to 13,130 feet (-382 to 4,000 meters)
Nominal Power
0.5 LPM Continuous ow
3 LPM Continuous Flow
1.0 Pulse Dose Setting
6.0 Pulse Dose Setting
Battery Charging
60 Watts
110 Watts
45 Watts
95 Watts
Approx. 50 W depending on device setting
Nominal Battery Pack Operating Time See Battery Duration Chart
Continuous Flow Indication Expressed in liters per minute (LPM)
Audible Alarm Indicators See Alarm Condition and Alarm Codes
Back-Up Alarm Power 9V Internal Battery
Filters Air Inlet, HEPA, Compressor Intake

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Pulse Dose Mode Specications
Pulse Settings 1.0 to 6.0, in 8mL increments up to 96 mL; 7-9 in 32mL increments up to 192 mL
Trigger Sensitivity Adjustable between settings of 1 (most sensitive) to 3 (least sensitive)
Adjustable Bolus Rise Time Adjustable settings of Fast(factory setting), Medium, or Slow
Trigger Criteria
• Cannula pressure has dropped below the trigger point (typically between
0.135—0.37 cm of H2O of negative pressure)
• At least 1¼ seconds has passed since the last pulse began
Minimum time between breaths 1.25 seconds (max. 3 consecutive breaths)
Response to Missing Breaths
While in Pulse Dose Mode, the eQuinox is always monitoring for breath detection.
After 15 seconds of no breath detected, the eQuinox “delivers”Continuous Flow at the
last Continuous Flow setting. After another 15 seconds, the eQuinox stops delivering
Continuous Flow and waits 15 seconds for a breath. The eQuinox will stay in this modality
until a breath is detected.
Pulse Dose Setting Bolus Size (± 15%) mL AC power, DC Power and Battery Pack
Max Breath Rate
1.0 16 40
2.0 32 40
3.0 48 40
4.0 64 40
5.0 80 37
6.0 96 31
7 128 23
8 160 18
9 192 15
NOTE:Bolus volume decreases as breath rate exceeds published range.
Table 2
Power Accessory Specications
AC Power Cable DC Power Cable Battery Pack
Input Voltage 100-240VAC, 50-60 Hz 11.5–16VDC NA
Input Power 170 VA Max ≤ 10 amps average 14.8 VDC
Output Voltage 28 VDC 11.5–16VDC NA
Output Power 150W NA NA
Capacity NA NA 24-Cell Battery: Quantity (2) 95 W-Hr Battery Packs
12-Cell Battery: Quantity (1) 89 W-Hr Battery Pack
Nominal Battery Pack
Life
NA NA 80% Capacity after 300 Charge/Discharge cycles
Battery Pack Recharge
Time
NA NA 2.0 to 5.0 hours, dependent on ow setting, to achieve
80% capacity from a fully discharged Battery Pack
Table 3

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Compressor and Compressor Enclosure
The eQuinox Compressor is a two-cylinder, variable speed compressor,
driven by a highly ecient Brushless DC (BLDC) motor. When air
ows into the Compressor enclosure, it passes through an air intake
lter/muer that mues sound and lters out impurities. Using one
cylinder, the compressor takes in ltered air and delivers it to the ATF
Module under pressure. The second cylinder draws a vacuum on the
ATF module and exhausts nitrogen rich gas to the exhaust vent.
Power Distribution
The Power Manager takes external power that comes into the eQuinox
from the power supplies or Battery Pack and monitors and controls
power distribution to the rest of the eQuinox system. The Power
Manager drives the compressor, ATF module motor, blower, and
provides power to the Control Board. In addition, when the unit is
connected to an external power source, the power manager monitors
and controls the recharging of the Battery Pack.
Control Board
The Control Board is at the center of nearly all eQuinox functions. The
board constantly monitors dynamics such as temperatures, pressures,
product ow and concentration, and user input. It determines proper
compressor and ATF motor speeds needed in order to provide
optimum system performance. In addition, this system supports the
operation of the Control Panel and its indicators.
The Control Board utilizes a proprietary ultrasonic ow and
concentration sensor and a ow control valve to accurately control the
ow of oxygen in Continuous Flow and Pulse Dose Modes.
Figure 1: Flow Sensor Board Diagram
Control Board
Continuous Flow Mode
Continuous Flow Mode delivers a constant ow of oxygen to a patient
by means of tubing and a nasal cannula at rates between 0.5 LPM and
3.0 LPM. Within the eQuinox, concentrated oxygen is stored in a 500ml
product tank at pressures in the range of 5 to 9 psi. This pressure gives
Continuous Flow Mode the capability to deliver the indicated ow rate
to the patient even if extension tubing is used, up to 50 feet long. In
addition, the eQuinox Continuous Flow Mode is fully compatible with
humidier use, with nasal cannula not exceeding 7 feet.
Pulse Dose Mode
The eQuinox Pulse Dose Mode delivers a measured bolus of oxygen at
the very beginning of each inspiration. The approach is based on the
manner in which gas is absorbed into a patient’s airway. eQuinox users
may select pulse dose volume delivery rates. Regardless of setting, the
pulse prole is a simple square-wave pulse based on a 16 mL volume.
(Refer to“Pulse Proles”table below). Pulse durations are no less than
100 milliseconds at the beginning of the inspiration. There are three
Rise Time settings (Slow, Medium, and Fast). The table below is for the
FAST Rise Time setting (factory default is Fast).
Flow
Setting
Pulse Peak
Flow, LPM
(volumetric)
Pulse Duration
(millisecond)
Bolus
Volume
(ml)
1.0 8 120 16
2.0 9 213 32
3.0 10 288 48
4.0 11 349 64
5.0 12 400 80
6.0 13 443 96
7 15 512 128
8 17 565 160
9 19 606 192
Table 4
Pulse Proles
The fundamental approach to triggering and controlling the oxygen
bolus in Pulse Dose Mode is as follows:
The User may select a pulse trigger sensitivity in settings ranging from
1-3. Bolus volume should be prescribed by a physician and may range
from 16mL up to 192mL. The pulse will be triggered when the system
meets all of the following criteria:
• The cannula pressure has dropped below the trigger point
(typically between 0.135 and 0.37 cm H20)
• At least 1¼ seconds has passed since the last pulse began

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Service Mode Functions
Factory maintenance or service updates may sometimes be required
on the eQuinox. Factory and qualied factory-trained technicians can
access service mode software functions by using the Service Port
located on the back of the unit. The Service Port is not for patient use.
Figure 2: eQuinox Service Port
EDAT
EDAT is the world’s rst computer-based data retrieval service tool
for oxygen concentrators. EDAT is proprietary to CAIRE Inc., and is
comprised of both hardware and software components. EDAT is
SeQual’s global solution for your service and support needs.
EDAT software is capable of sensing and displaying historical event
logs and values of components and sensors within the eQuinox
system. This can be used to determine system faults or user errors and
communicate data for troubleshooting or documentation related to
service and updates. EDAT hardware attaches or Plugs into the eQuinox
Service Port, and into a computer’s USB port.
The EDAT software set allows a provider to set-up a hub and spoke
service center. Field service reps can travel to a patient’s home,
troubleshoot and transmit the data to either in-house tech support
personnel or CAIRE. Support personnel can diagnose, provide solutions
and print documentation for equipment records.
EDAT also makes eQuinox software upgrades easy and accessible.
For more information on EDAT, contact CAIRE Inc. Technical Service at
1-800-482-2473.

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Power Supplies
The eQuinox may operate from either the AC Power Supply, DC Power
Cable or Battery Pack. When power is available from an external supply,
the eQuinox will draw from the external source rather than depleting
the Battery Pack. Connection to external power is indicated when
the External Power Present Indicator located on the Control Panel is
illuminated.
AC Power Supply
The AC Power Supply is a universal input type, capable of accepting
100-240VAC, 50/60 Hz. It is capable of delivering up to 150W of 28VDC
output. The input cord requires a grounded receptacle. Country
specic cords or universal power adapter PN 5591-SEQ may be used
with the AC Power Supply, as the power supply is equipped with
a universal input receptacle. When used in a medical care facility,
international safety standards require the use of hospital grade AC
power cord with the eQuinox.
Figure 3: eQuinox AC Power Supply
The eQuinox AC Power Supply does not contain a fan. When in use, the
AC Power Supply should be located in a well-ventilated area.
Located near the output cord, there is a green LED that is illuminated
when the AC Power Supply is supplying 28VDC power. If the LED is not
illuminated, there is no input power available. In addition, the Power
Supply contains protection circuits for output over-current, input
over-voltage, and internal over-temperature conditions. If any of these
conditions exist, output power will be interrupted and the LED turns
o. However, these three conditions are self-resetting, such that output
power will resume when protection circuits fall back into acceptable
operating ranges.
DC Power Cable
The DC Power Cable is intended for use with DC accessory outlets,
such as those found in motor vehicles. Input voltage required to power
the eQuinox from via the DC Power Cable is 11.5 - 16VDC. The 12 Volt
DC Power Cable is sized to compatible with most passenger vehicle
electrical systems.
Figure 4: eQuinox DC Power Cable
The eQuinox will run at all ow settings when being operated with
the DC Power Cable in a vehicle including 3.0LPM on continuous ow
and all pulse settings 1-9. The eQuinox will charge the Battery Pack
while being operated with the DC Power Cable, including 3.0LPM
continuous ow and 192mL in pulse mode. Some vehicles may not be
able to supply enough power to sustain these settings. In the event
the vehicle cannot provide enough power to operate at the current
setting, the eQuinox will rst stop charging the battery. If the vehicle
still cannot provide enough power the eQuinox will lower the ow.
If the lower ow causes the patient discomfort or is causing patient
saturation levels to decrease, removing the Battery Pack may increase
the ow.
Battery Pack
The Battery Pack allows operation away from AC or DC power. The
Battery Pack used with the eQuinox contains Lithium ion battery
cells, similar to those used in laptop computers and cell phones. The
standard 12-cell eQuinox Battery Pack contains a single 89 Watt hour
battery pack which contains 7.38 grams of equivalent lithium content.
The optional 24-cell eQuinox Battery Pack contains a quantity of two
95 Watt hour battery packs. Each battery pack contains 7.92 grams of
equivalent lithium content, or 15.82 grams total.
Figure 5: eQuinox Battery Pack

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The Battery Pack (Battery) may be charged in two ways: (a) place the
Battery Pack in the eQuinox and connect the eQuinox to AC or DC
power, or (b) place the Battery Pack in the optional Desktop Charger.
Operating and servicing the Battery Pack will ensure longer life
and higher performance. It is important to follow the tips and
recommendations when storing and operating the eQuinox on the
Battery Pack.
The eQuinox Battery Pack operation time may be aected by several
factors such as bolus size, breathing rates, ambient temperature, age of
Battery Pack and use over time. The table below describes the typical
operating time for a new Battery Pack.
If the eQuinox is used in Pulse Dose Mode, there will be longer
operating time. The patient should consult their physician for a
prescription for Pulse Dose Mode.
(At nominal temperature of 25ºC/77°F)
Typical New Battery Pack Operating Times*
Battery Type
12-Cell 24-Cell
Continuous Mode
0.5 LPM 2.48 hrs 5.28 hrs
1 LPM 2.16 hrs 4.84 hrs
2 LPM 1.20 hrs 2.75 hrs
3 LPM 0.80 hrs 1.83 hrs
Pulse Mode (12 BPM)
Setting 1.0 Bolus 16 mL 2.62 hrs 5.94 hrs
Setting 2.0 Bolus 32 mL 2.50 hrs 5.70 hrs
Setting 3.0 Bolus 48 mL 2.38 hrs 5.39 hrs
Setting 4.0 Bolus 64mL 2.31 hrs 4.94 hrs
Setting 5.0 Bolus 80 mL 2.22 hrs 4.75 hrs
Setting 6.0 Bolus 96 mL 1.70 hrs 3.85 hrs
Setting 7.0 Bolus 128 mL 1.56 hrs 3.33 hrs
Setting 8.0 Bolus 160 mL 1.28 hrs 2.72 hrs
Setting 9.0 Bolus 192 mL 1.0 hrs 2.15 hrs
Table 5: Battery Consumption Chart
Note:
Battery times will decrease with higher bolus size,
breath rate, ambient temperature, Battery age and use
over time.
The Battery Pack packaged with the eQuinox is not fully charged.
Before using the eQuinox Oxygen System for the rst time, the Battery
Pack must be fully charged.
Store the Battery Pack in a cool, dry location. Do not leave the eQuinox
or Battery Pack in a vehicle or trunk.
When checking the eQuinox as baggage on a commercial airline ight
for international travel, remove the Battery Pack and properly package.
When shipping the eQuinox for any reason, remove the Battery Pack
from the eQuinox.
If the Battery Pack gets too warm, charging will not begin until the
Battery Pack suciently cools. Consider removing the Battery Pack to
allow for faster cooling.
The Battery Pack operating time is longer if the eQuinox is operated in
Pulse Dose Mode. (Refer to Battery Consumption Chart above.)
The typical time to recharge the Battery Pack to achieve 80%
capacity from a fully discharged Battery Pack is 1.8 hours to 5.0 hours,
dependent upon the ow setting.
WARNING: DO NOT tamper with, disassemble, crush or heat the
Battery Pack above 122° F (50° C). The Battery Pack
may present a risk of re or explosion and will void the
warranty.
CAUTION Store the Battery Pack in a cool, dry place when not in
use.
DO NOT leave the eQuinox or the Battery Pack in a
vehicle or in the trunk during a hot or cold day.
The eQuinox system can only work with a SeQual
Battery Pack. Use of another Battery Pack or Battery
may damage the unit, present a risk of re or
explosion and will void the warranty.

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Figure 6: Battery Pack Status Gauge
While the eQuinox Battery Pack allows the concentrator to operate at
its full range of capabilities, the primary purpose of the Battery Pack
is to allow a patient to ambulate while they are moving between
stationary power sources. The eQuinox’s Battery Pack, like all lithium
ion batteries, is susceptible to permanent damage from excessive heat.
Exposure to excessive heat may signicantly shorten the service life of
the Battery Pack.
Each Battery Pack contains multiple temperature sensors to monitor
battery cell temperature. The amount of heat the Battery Pack can
safely endure varies depending on how the Battery Pack is being
used. During discharge, the eQuinox software will alarm when internal
battery cell temperature exceeds 60°C, and will shut the system down
if internal battery cell temperature exceeds 75°C. While the Battery Pack
is charging, software will interrupt charger operation when the internal
battery temperature exceeds 45°C or temperature is less than 0°C . In
both of these cases, when internal battery cell temperature falls within
these limits, the eQuinox will resume normal operation. Operation near
these temperature limits will not damage the Battery Pack, but are in
place to ensure that the service life of the Battery Pack is preserved.
Heat in the Battery Pack is generated during discharge, and can also
be the result of operating the eQuinox in high ambient temperatures.
The amount of internally generated heat varies with the ow setting –
higher ows induce greater Battery Pack heating. While high ambient
temperatures are typically the result of operation on a hot day, running
the eQuinox with inadequate ventilation can also add additional
heat. Always ensure that the eQuinox is operated in a well-ventilated
space, the air intake lter is clean, and intake and exhaust vents are
unobstructed.
Charging Algorithm
The charging algorithm is performed by the Power Manager software
and involves three basic decisions:
1. When to start charging
2. How fast to charge
3. When to stop charging
Charging begins when Battery Pack voltage falls below 90% charge.
The charging current is limited by the charger capability and the rated
capacity of the Battery Pack. Under certain conditions, the eQuinox
may not have enough external power available to charge the batteries
at the full rate. In this case, the charging rate will be limited to the
available power.
The software will only charge when the Battery Pack temperature is at
or below 45°C. The software will always run the cooling fan whenever
the charger is enabled. The Battery Pack charger is disabled and the
cooling fan is set to maximum whenever the Battery Pack temperature
exceeds 45°C. The Battery Pack charger is disabled when temperature is
less than 0°C.
All lithium ion batteries self-discharge at very low rates when not
in use. eQuinox Battery Packs are shipped from SeQual in a partially
charged state (nominally 30%). When stored in a cool, dry location, the
Battery Pack can sit unused for up to 12 months without appreciable
self-discharge occurring. Nevertheless, CAIRE recommends a rst in,
rst out rotation of Battery Pack inventory for maximum Battery Pack
service life.

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Introduction
Welcome to the eQuinox, Personal Ambulatory Oxygen System with
autoSAT Technology. Setting up and training your patient to use the
eQuinox has never been easier! You can expect your patients and
care providers to easily learn how to use the device by following the
directions in this section. While setting up and training a patient, be
sure to point out the advantages of the eQuinox. For example:
• Slim and sleek appearance
• Easy-to-use controls
• Quiet operation
• Lower electric bills
• Self-monitoring alarm system
• More consistent FiO2 at higher breath rates
After completing each training procedure, ask your patient if he or she
has any questions. Proper training of your patients will result in fewer
service calls, improved compliance and increased patient satisfaction.
Pre-Delivery Check List
Before delivering the device, check and log the status of the following:
Parts Inventory – Verify that each eQuinox is provided to the patient
with the following items:
• Users Manual
• eQuinox Cart
• Cannula
• AC Power Cord
• AC Power Supply
• DC Power Cord
• 12 Cell or 24 Cell Battery Pack
• Air Inlet Filter and Spare
Power Sources – Insert and check the following for proper operation:
• AC Power Supply with Power Cord
• DC Power Cord
• 12-Cell Battery Pack
Electrical System – Use the Control Panel to check and/or adjust the
following:
• Pulse Dose Setting
• Continuous Flow Setting
• Hour meter
• Pulse Dose Sensitivity
• 9V Battery Status
• Rise Time
• Software Revision
• Battery Pack Status Gauge
The eQuinox is shipped from CAIRE at default ow settings of 2 LPM
Continuous Flow, 2.0 Pulse Dose, and 2 for Pulse Mode Sensitivity
Adjustment and Fast Rise Time. You may adjust these settings to your
patient’s prescription when you deliver and set up the device.
Adjusting Rise Time
The adjustable Rise Time feature on the eQuinox was designed for
patient comfort. The Rise Time feature adjusts ow and speed of bolus
delivery, and determines how quickly the patient receives their bolus
volume while in Pulse Dose Mode. The eQuinox oers delivery settings
of FAST, MEDIUM, and SLOW. The factory default setting is FAST. A
MEDIUM or SLOW rise time may be appropriate for certain patients,
and should be determined and set by a trained clinician. Adjusting the
Rise Time will not aect the chosen volume of oxygen delivered to the
patient (16-192 mL).
Connecting the AC Power Supply
The eQuinox operates from external power when connected to a
power outlet.
To connect the eQuinox to the AC Power Supply, follow these steps:
1. Insert the AC supply plug tip into the eQuinox.
2. Insert the power cord into the AC Power Supply.
3. Plug the power cord into a grounded outlet.
4. The power supply LED displays green to indicate that the AC
Power Supply is drawing power. The External Power Present Indi-
cator on the Control Panel illuminates.
Note:
If the Power Supply Status LED is not illuminated
after inserting the plug into a outlet, check to make
sure the Power Supply and power cords are securely
plugged into the eQuinox.
WARNING: • Ensure adequate clearance around the AC Power
Supply.
• The AC Power Supply is universal input, but the
AC power cord is appropriate to specic coun-
try’s electrical service. Ensure that power cord is
appropriate to country’s electrical service.
CAUTION • DO NOT connect the eQuinox to an extension
cord or electrical outlet controlled by a switch.
Note:
When removing the AC Power Supply from the
eQuinox, remove the plug from the AC outlet before
removing the AC Power Supply plug from the
eQuinox.

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20771733 D 13
Monthly Maintenance—Patient
Care for the Battery Pack
The Battery Pack in the eQuinox requires special care to assure a
longer life and the highest level of performance. The SeQual Battery
Pack is the only approved Battery Pack recommended for use with the
eQuinox. The following are generic guidelines for the Battery Pack:
• Avoid high temperatures
• Avoid cold temperatures
• Do not drop Battery Pack
• Do not jab objects into contacts
Battery Pack Cleaning: Use a damp (not soaking wet) cloth or
sponge. First spray the cloth or sponge with a mild detergent and then
clean the Battery Pack case and the latch.
WARNING: Exposing the Battery Pack to water or other liquids
may cause personal injury or harm.
DO NOT tamper with or try to repair the Battery Pack.
There are no serviceable parts inside.
Battery Pack Storage: The Battery Pack should be stored in a cool
and dry location.
Note: The patient can still use the eQuinox while calibrating
the Battery Pack.
Note:
• If the Battery Pack temperature rises above 45°C
(113°F), the Battery Pack will not charge.
• If the Battery Pack temperature rises above 75C
for the 12 Cell battery Pack and 60C for the 24 Cell
Battery Pack, the Battery Pack will not discharge.
eQuinox Monthly Run-Time Procedure
1. Power on eQuinox using AC Power, DC Power, or Battery Pack
2. Allow unit to run for a minimum of 2 hours

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Annual Maintenance
Procedures
The following section lists procedures that are necessary to maintain
the eQuinox. Service should only be performed by a qualied
technician. To perform periodic maintenance, the only tools that
should be necessary are:
• #1 Phillips Screwdriver
• 3/8”or 10mm Deep Well Socket and Ratchet
WARNING: Disconnect all power supplies going to the unit prior
to performing the following steps
Remove and Replace 9-Voly Battery and
Compressor intake Filter
Replace the 9-volt battery when the unit beeps three times at the end
of power-on self-test, when voltage is less than 7.0 Volts, or during
annual PM. To replace the 9-volt battery, follow these steps:
1. Remove the rear cover by loosening the two Phillips-head screws.
NOTE: The two captive screws will not remove completely from
the rear panel.
Figure 7
Figure 8
2. Place nger under recessed area and pull outward.
Figure 9
3. Once the cover is removed, replace the 9-Volt Battery by pushing
up slightly on the bottom of the battery and then pulling out.
Figure 10

Personal Ambulatory Oxygen System Provider Technical Manual
20771733 D 15
4. Once the old battery is removed, insert the new 9-Volt battery by
following steps 1-3 in reverse.
Note:
The polarity of the 9-Volt battery does not have to be
aligned in a certain manner when inserting the new
9-Volt battery.
5. Once the 9-Volt Battery has been replaced, the next step is to
replace the Compressor Intake Filter. To remove the Compressor
Intake Filter, push the metal tab on the end of the lter inward
and pull outward (similar to the process for removing the 9-Volt
Battery).
Figure 11
Figure 12
6. To insert the new Compressor Intake Filter, align the end of the
lter with the inlet hole with the plastic housing on the eQuinox.
Figure 13
7. Push the lter inward towards the plastic housing and then
inward towards the eQuinox, ensuring that the lter is sitting ush
against the plastic housing and at against the rear case of the
eQuinox.
Figure 14
8. Replace the back cover and retighten the two captive Phillips-
head screws (5.5 in. lb max).
9. To replace the HEPA lter, locate the aluminum oxygen outlet on
the front of the unit.
Figure 15

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20771733 D 16
10. Slide a 3/8”or 10mm deep well socket over the aluminum
oxygen outlet, ensuring that the socket makes contact with the
tting on the boom of the oxygen outlet.
Figure 16
11. Attach appropriate ratchet to the socket and loosen by rotating
the socket counter-clockwise until the oxygen outlet is free and
remove. NOTE: Make sure that the black o-ring is removed when
taking out the oxygen outlet.
Figure 17
12. Once the oxygen outlet and HEPA lter assembly have been
removed, remove the HEPA lter from the oxygen outlet by un-
screwing the HEPA lter from the oxygen outlet.
Figure 18
13. Place a new o-ring over the threaded end of the oxygen outlet
and tighten in the new HEPA lter.
Figure19
14. Replace the oxygen outlet assembly by repeating steps 10-11 in
reverse.
15. Next locate the Cabinet Inlet Filter and remove.
Figure 20
16. Replace the Cabinet Inlet Filter with a new Cabinet Inlet Filter.

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20771733 D 17
Assembly and Alarm Verication Tests
To ensure proper assembly and functionality of the eQuinox after it has
been reassembled, the following steps should be followed.
1. Install the Battery Pack into the Battery Pack compartment of
the eQuinox. Plug the AC Power Supply into the wall outlet and
connect it to the External Power Connector of the eQuinox.
2. Press the ON button and set the eQuinox to 2 LPM. At initial
start-up, the eQuinox will light the Green, Yellow and Red LED’s
accompanied by a beep. As concentration increases to ~70%,
the Red LED turns o and the Yellow and Green remain on. When
the concentration reaches normal operating range (above 85%),
the Yellow LED will turn o. The Green LED will stay lit indicating
normal operation. Table 3 shows the normal start-up operating
conditions for eQuinox Oxygen Systems. If LED is not green within
7 minutes there may be a problem with the eQuinox.
Green
Indicator
Yellow
Indicator
Red
Indicator
Audible
Alarm
Alarm
code
Operating
Condition
O O Blinking Beeps 0004 Purity < 70%
O Blinking O O 0008
Purity
between 70%
and 85%
On O O O 0000
Normal
Operating
Condition
Table 6
3. Verify that the Battery Pack is charging as indicated by the Battery
Pack Status Gauge is moving in waterfall fashion (scrolling from
bottom to top). If the Battery Pack Status Gauge is not moving,
verify that the Battery Pack is properly engaged.
4. Check the Control Panel by pressing each of the Increase/
Decrease, Pulse Dose Mode and No Smoking buttons and
observe that the eQuinox buttons function normally.
5. Press the Delivery Mode button and set the eQuinox to the
patient’s normal Pulse Dose setting. Conrm that without
breathing from the unit, after 15 seconds of no breath detected,
the system changes automatically to Continuous Flow Mode. The
green Delivery Mode light is blinking fast, indicating the system
is delivering a Continuous Flow. After another 15 seconds, the
system stops delivering Continuous Flow and waits 15 seconds
trying to detect a breath. The cycle continues until a breath is
detected.
6. After 5 minutes of operation, block the Cannula Fitting Outlet with
your nger for 2 minutes and conrm that the visual and audible
alarm occurs. Unblock the Cannula Outlet Port and let it stabilize
until the alarm stops.
7. Disconnect the AC Power Supply and allow the eQuinox to run
for about one minute. Set the eQuinox to the patient’s normal
Continuous Mode setting. Conrm that the Battery Pack Status
Gauge is illuminated and External Power Present Indicator is o.
8. Remove the Battery Pack and verify that the eQuinox alarms and
red Alarm Indicator is ashing and the alarm sounds. After about
5 seconds, re-install the Battery Pack and connect the AC Adapter
and observe that the eQuinox automatically restarts. Conrm that
the External Power Present Indicator is illuminated.
9. Turn o eQuinox and unplug the AC Power Supply.
10. Record results, initial and date the Service and Maintenance
Record.
11. EDAT may be utilized to record eQuinox device status and dates
of service.
Electrical Safety Test
This is required only for the eQuinox Oxygen System, that is used in a
hospital or institutional environment. This is not required for home care
use.
To test the basic electrical safety of the eQuinox AC Power Supply,
CAIRE recommends using an LKG-601 Electrical Safety Analyzer
(Netech Corporation, Hicksville, NY) or equivalent to verify that the
current leakage to ground is within appropriate limits.
1. Plug the AC Power Supply into the electrical safety analyzer.
Disconnect the AC Power Supply from the eQuinox unit.
2. Plug the electrical safety analyzer into a wall outlet.
3. Follow the analyzer manufacturer’s instructions for measuring
both the forward and reverse earth leakage current only. Verify
that forward and reverse-current leakage to ground is < 250
µA (100/115VAC applications) and < 500 µA (220/240VAC
applications).
4. Disconnect the AC Power Supply from the electrical safety
analyzer.
5. If the AC Power Supply measures leakage current greater than the
criteria in step 3, please return it to CAIRE for service.
6. EDAT may be utilized to record eQuinox device status and dates
of service.
Cleaning the eQuinox
Clean inside the unit, as needed, using a small vacuum cleaner or
brush to remove any accumulation of dust or debris prior to attaching
the covers. After reinstalling the cover, verify that the rubber gasket is
installed correctly.
Use mild detergent solution to clean the cabinet, Control Panel and
power supplies. Turn OFF the eQuinox and disconnect from AC or DC
power before any cleaning or disinfection activity. DO NOT spray the
cabinet Control Panel or power supplies. Use a damp (not soaking
wet) cloth or sponge. Spray the cloth or sponge with a mild detergent
solution to clean the cabinet and power supplies. To disinfect the
eQuinox, use Lysol® Brand II disinfectant. Proceed as directed by the
manufacturer.
WARNING: Disconnect and Remove ALL power supply
connectors before cleaning the exterior cabinet. DO
NOT use denatured alcohol or apply liquid spray or
aerosol cleaners.

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20771733 D 18
Provider Service and Maintenance Record
Whenever maintenance or service is performed on an eQuinox unit, an entry should be made in the service log for that concentrator or
recorded in accordance with your company’s standard procedure. Whenever the case of the eQuinox is opened, the ow rate, purity, and alarm
status should be veried per the Test Procedures in this manual.
EDAT may be utilized to record eQuinox device status and dates of service.
Note: Use the “Save As” function under the “File” section and save the le as the SN and/or the date serviced (example: 08D0110xxxx
08012000).
eQuinox Serial Number _________________________________________
Date Hour meter
Reading Initials Service Performed
System Checkout
Comments
Purity Flow Alarms
Table 7: Sample eQuinox maintenance record

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20771733 D 19
Voice Module Operation
Voice Module Operational Instructions
The eQuinox is equipped with the capability of providing vocal
notications and operational status intended to supplement
information displayed to the end user via LED (light emitting diodes)
and/or the unit display. The following information provides instructions
on how to enable/disable the voice module function, adjust loudness,
and change language as preferred by the end user.
Figure 21
Enable/Disable the Voice Module
1. To enable/disable the voice module function, power on the unit
by pressing the ON/Standby Key.
2. After the unit has powered on, press the No Smoking Icon and
Hidden Key once.
3. Within 1–2 seconds, the SPKR = ON or SPKR = OFF menu item will
be present.
4. Press the Increase or Decrease Flow Rate Key to toggle the
selection to ON (enable voice module) or OFF (disable voice
module).
5. Within 3–5 seconds, the option selected will become active.
Note:
This will only disable the voice module function once.
When the device is turned o and device is reset, the
voice module function will automatically be enabled.
Increase/Decrease the Volume of Vocal
Notications
1. To increase or decrease the volume of vocal notications, press
the No Smoking Icon & Hidden Key twice.
2. The Volume = # - (Volume Setting Menu) will be present.
3. Press the Increase or Decrease Flow Rate Key to increase or
decrease the volume level from 1 to 10.
4. After selecting the desired loudness, the option will become
active/set within 3–5 seconds.
Changing Voice Module Language
1. To change the voice module language, press the No Smoking
Icon & Hidden Key ve times to access the language options.
2. The current activated language will be indicated on the display.
For example, if the voice module is speaking English when
accessing the language options menu, “English” will be the text
that appears on the display.
3. Press the Increase or Decrease Flow Rate Key to scroll through the
languages available.
4. Once the desired language is displayed, allow the units to sit and
the visible language will automatically be set in 3 – 5 seconds.

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20771733 D 20
eQuinox Voice Message Alert Descriptions Table
eQuinox Voice Message Alert Descriptions
Condition Standard eQuinox Voice Message Message Repeat Interval
Flow rate error > +/- 10% “Low output ow. Check the cannula.” Continuous until condition is removed.
30 minutes runtime remaining on battery “30 minutes remaining on battery.” One instance
15 minutes runtime remaining on battery “15 minutes remaining on battery.” One instance
Low battery “Low on battery. Please plug in external
power.”
Message played every 29 seconds until loss of
power state.
Change in continuous ow setting “Continuous mode ow xx liter per minute.”
(xx = [0.5L, 1.0L, 1.5L, 2.0L, 2.5L, 3.0L])
One instance
Change in pulse ow setting “Pulse dose mode xx milliliter.”
(xx = [16mL, 32mL, 48mL, 64mL, 80mL, 96mL,
128mL, 160mL, 192mL])
One instance
Patient’s breath rate not detected “Cannot detect breathing.” One instance
Loss of power to unit “Loss of power. Please plug in external power
or battery.”
Continuously until condition is removed.
Unit is powered on in Pulse Mode and is using
AC power supply.
“The device is running. External power
connected. Pulse dose mode xx milliliter.”
(xx = [16mL, 32mL, 48mL, 64mL, 80mL, 96mL,
128mL, 160mL, 192mL])
After start-up beep, on instance.
Unit is powered on in Continuous Mode and
is using AC power supply.
“The device is running. External power
connected. Continuous dose mode xx liter
per minute.”
(xx = [0.5L, 1.0L, 1.5L, 2.0L, 2.5L, 3.0L])
After start-up beep, on instance.
Unit is powered on in Continuous Mode and
is using battery.
“The device is running. Using battery.
Continuous dose mode xx liter per minute.”
(xx = [0.5L, 1.0L, 1.5L, 2.0L, 2.5L, 3.0L])
After start-up beep, on instance.
Unit is powered on in Pulse Mode and is using
battery.
“The device is running. Using battery. Pulse
dose mode xx milliliter.”
(xx = [16mL, 32mL, 48mL, 64mL, 80mL, 96mL,
128mL, 160mL, 192mL])
After start-up beep, on instance.
While unit is running from battery, the AC
power supply is connected.
“External power connected.” One instance
While unit is running from AC power with the
battery installed and the AC power supply is
removed.
“Using battery.” One instance
When powering unit o. “The device is now turned o.” One instance
Table 8