eQuinoxTM
Personal Ambulatory Oxygen System (PAOS)TM

Model 4000

PROVIDER TECHNICAL MANUALTable of Contents
General Information.................................................................... 3

Voice Module Operation........................................................... 19

Warning and Caution Statements....................................................................3

Voice Module Operational Instructions.....................................................19
Enable/Disable the Voice Module.................................................................19

Introduction to the eQuinox Oxygen System............................ 4
eQuinox Oxygen System Specifications.................................... 5
Pulse Dose Mode Specifications.......................................................................6
Power Accessory Specifications.........................................................................6
Compressor and Compressor Enclosure......................................................7

Increase/Decrease the Volume of Vocal Notifications......................19
Changing Voice Module Language..............................................................19eQuinox Voice Message Alert Descriptions Table...............................20
eQuinox Voice Message Alert Descriptions.............................................20
Troubleshooting, Service, and Repair Procedures.................. 21

Power Distribution.....................................................................................................7
Control Board................................................................................................................7

Alarm Conditions and Alarm Codes......................................... 22

Continuous Flow Mode..........................................................................................7
Pulse Dose Mode........................................................................................................7
Pulse Profiles..................................................................................................................7
Service Mode Functions.........................................................................................8

Malfunction Codes..................................................................... 23
Servicing the eQuinox............................................................... 25

EDAT....................................................................................................................................8

I. Removing/Replacing the Back Cover......................................................25

Power Supplies............................................................................. 9III. Removing/Replacing the Back Cover Foam
and Intake Muffler Section........................................................................26

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

II. Removing/Replacing the Handle and Speaker................................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

Monthly Maintenance—Patient............................................... 13
Care for the Battery Pack.....................................................................................13

Parts List..................................................................................... 39

Calibrating the Battery Pack..............................................................................13

Optional Accessories.............................................................................................40

eQuinox Monthly Run-Time Procedure.....................................................13
Annual Maintenance
Procedures........................................................................... 14

CAIRE Inc. Customer Service Contact Information.................. 41
Authorized European Union Representative:......................... 41

Remove and Replace 9-Volt Battery andCompressor intake Filter.............................................................................14
Assembly and Alarm Verification Tests.......................................................17
Electrical Safety Test ..............................................................................................17
Cleaning the eQuinox ..........................................................................................17
Provider Service and Maintenance Record..............................................1820771733 D 2

Personal Ambulatory Oxygen System Provider Technical Manual

General Information
This technical manual will familiarize you with Provider-specificinformation regarding the eQuinox Oxygen System. Instructions in thismanual are intended to help ensure that:• Providers are familiar with eQuinox system components andsystem principles of operation• Providers are given proper guidance in the use of the eQuinox andits 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 defined as follows:
WARNING:CAUTION

Note:

Important safety information for hazards that mightcause serious injury.

Important information for preventing damage to theeQuinox.

Places emphasis on an operating characteristic or
important consideration.

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Personal Ambulatory Oxygen System Provider Technical Manual

Introduction to the eQuinox Oxygen System
eQuinoxOxygen Outlet
Port

FRONT
HandleControl
Panel
External Power
Receptacle
FAA
Approval Icon

eQuinox Cart

AC Power Supply

Battery
Pack Latch

Rating Label &Serial Number
Location

BatteryPack

BACK
12VDC Cable

Service Cabinet

ExhaustVent

Air inlet
Battery Pack

Filter20771733 D 4

Personal Ambulatory Oxygen System Provider Technical ManualeQuinox Oxygen System Specifications
Dimensions (H x W X D)
WeighteQuinoxBattery Pack
Flow Settings

13.6 x 10.6 x 7.4 (inches)(34.5 x 26.9 x 18.8 cm)
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)
0.5 to 3.0 LPM (0.5 liter increments)

Continuous Flow (measured in Liters Per Minute LPM)
Pulse Dose (measured in mL)

Settings 1.0-6.0: 16-96mL (8mL increments)

Continuous Flow Accuracy

Settings 7-9: 128mL, 160mL, 192mL+/- 10% or 200ml/min, whichever is greater

Oxygen Concentration

90% (+5.5/-3%) for all flow settings

Maximum System Pressure

15 psig (103.5 kPa)

Oxygen Output Pressure

5.0 psig (34.5 kPa) nominal
Green Light = Normal Operation

Oxygen Concentration
Status Indicator
Nominal Sound Level

Yellow Light = Warning or Caution, less than 85% ± 3%
Red Light Flashing = Abnormal Operation, less than 70% ± 5%

3.0 LPM Continuous Flow

46 dB(A)

0.5 LPM Continuous Flow

40 dB(A)Operating Environment
Temperature (Unit ONLY, without Battery Pack)
Humidity
Storage Environment

32º F to 104º F (0° to 40°C)
10% to 95%, Non-condensing, 82.4°F (28°C) Maximum Dew point

Temperature-4º F to 140º F (-20° to 60°C)

Temperature (Battery Pack)-4°F to 122°F (-20° to 50°C)

Humidity
Altitude Operating Range
Nominal Power

Up to 95% Non-condensing-1254 to 13,130 feet (-382 to 4,000 meters)

0.5 LPM Continuous flow

60 Watts

3 LPM Continuous Flow

110 Watts

1.0 Pulse Dose Setting

45 Watts

6.0 Pulse Dose Setting

95 Watts

Battery Charging
Nominal Battery Pack Operating Time

Approx. 50 W depending on device setting
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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Personal Ambulatory Oxygen System Provider Technical Manual

Pulse Dose Mode Specifications
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
• 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

Trigger Criteria
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 thelast 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

AC power, DC Power and Battery Pack

Bolus Size (± 15%) mL

Max Breath Rate
16
40
32
40
48
40
64
40
80
37
96
31
128
23
160
18
192
15
NOTE: Bolus volume decreases as breath rate exceeds published range.
Table 2

1.0
2.0
3.0
4.0
5.0
6.0
7
8
9

Power Accessory Specifications
AC Power Cable

DC Power Cable

Battery Pack

Input Voltage

100-240VAC, 50-60 Hz

11.5–16VDC

NA

Input Power170 VA Max≤ 10 amps average

14.8 VDC

Output Voltage

28 VDC

11.5–16VDC

NA

Output Power

150W

NA

NA

CapacityNA

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 flow setting, to achieve
80% capacity from a fully discharged Battery Pack
Table 320771733 D 6

Personal Ambulatory Oxygen System Provider Technical ManualCompressor and Compressor Enclosure

Continuous Flow Mode

The eQuinox Compressor is a two-cylinder, variable speed compressor,
driven by a highly efficient Brushless DC (BLDC) motor. When air
flows into the Compressor enclosure, it passes through an air intake
filter/muffler that muffles sound and filters out impurities. Using one
cylinder, the compressor takes in filtered 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.

Continuous Flow Mode delivers a constant flow 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 flow 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 withhumidifier use, with nasal cannula not exceeding 7 feet.

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 PowerManager drives the compressor, ATF module motor, blower, andprovides power to the Control Board. In addition, when the unit isconnected to an external power source, the power manager monitorsand 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 flow and concentration, and user input. It determines propercompressor and ATF motor speeds needed in order to provide
optimum system performance. In addition, this system supports theoperation of the Control Panel and its indicators.
The Control Board utilizes a proprietary ultrasonic flow andconcentration sensor and a flow control valve to accurately control theflow of oxygen in Continuous Flow and Pulse Dose Modes.

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 themanner in which gas is absorbed into a patient’s airway. eQuinox users
may select pulse dose volume delivery rates. Regardless of setting, thepulse profile is a simple square‑wave pulse based on a 16 mL volume.
(Refer to “Pulse Profiles” 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 4Control Board
Figure 1: Flow Sensor Board Diagram

Pulse Profiles
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 systemmeets 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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Personal Ambulatory Oxygen System Provider Technical ManualService Mode Functions
Factory maintenance or service updates may sometimes be requiredon the eQuinox. Factory and qualified factory-trained technicians canaccess 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 PortEDAT
EDAT is the world’s first computer-based data retrieval service tool
for oxygen concentrators. EDAT is proprietary to CAIRE Inc., and iscomprised 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 andcommunicate data for troubleshooting or documentation related toservice 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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Personal Ambulatory Oxygen System Provider Technical Manual

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 isilluminated.

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.

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
specific cords or universal power adapter PN 5591-SEQ may be usedwith the AC Power Supply, as the power supply is equipped witha 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 4: eQuinox DC Power Cable

The eQuinox will run at all flow settings when being operated with
the DC Power Cable in a vehicle including 3.0LPM on continuous flow
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 flow and 192mL in pulse mode. Some vehicles may not beable to supply enough power to sustain these settings. In the eventthe vehicle cannot provide enough power to operate at the current
setting, the eQuinox will first stop charging the battery. If the vehicle
still cannot provide enough power the eQuinox will lower the flow.
If the lower flow causes the patient discomfort or is causing patient
saturation levels to decrease, removing the Battery Pack may increase
the flow.

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 illuminatedwhen the AC Power Supply is supplying 28VDC power. If the LED is notilluminated, 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
off. However, these three conditions are self-resetting, such that output
power will resume when protection circuits fall back into acceptable
operating ranges.

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 hourbattery 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 ofequivalent lithium content, or 15.82 grams total.

Figure 5: eQuinox Battery Pack

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Personal Ambulatory Oxygen System Provider Technical Manual

The Battery Pack (Battery) may be charged in two ways: (a) place theBattery 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 lifeand higher performance. It is important to follow the tips andrecommendations when storing and operating the eQuinox on theBattery Pack.
The eQuinox Battery Pack operation time may be affected by several
factors such as bolus size, breathing rates, ambient temperature, age ofBattery Pack and use over time. The table below describes the typicaloperating 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 aprescription for Pulse Dose Mode.
(At nominal temperature of 25ºC/77°F)
Typical New Battery Pack Operating Times*
Battery Type
12-Cell

24-CellContinuous 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

Battery Pack sufficiently cools. Consider removing the Battery Pack toallow 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 flow setting.
WARNING:

DO NOT tamper with, disassemble, crush or heat theBattery Pack above 122° F (50° C). The Battery Packmay present a risk of fire or explosion and will void thewarranty.

CAUTIONStore the Battery Pack in a cool, dry place when not inuse.
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 fire or
explosion and will void the warranty.

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 first 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 flightfor international travel, remove the Battery Pack and properly package.
When shipping the eQuinox for any reason, remove the Battery Packfrom the eQuinox.
If the Battery Pack gets too warm, charging will not begin until the20771733 D 10

Personal Ambulatory Oxygen System Provider Technical Manual

Charging Algorithm
The charging algorithm is performed by the Power Manager softwareand 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 theavailable power.

Figure 6: Battery Pack Status Gauge

While the eQuinox Battery Pack allows the concentrator to operate atits full range of capabilities, the primary purpose of the Battery Packis 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 significantly shorten the service life of
the Battery Pack.

The software will only charge when the Battery Pack temperature is ator below 45°C. The software will always run the cooling fan wheneverthe charger is enabled. The Battery Pack charger is disabled and thecooling fan is set to maximum whenever the Battery Pack temperature
exceeds 45°C. The Battery Pack charger is disabled when temperature isless 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 partiallycharged state (nominally 30%). When stored in a cool, dry location, theBattery Pack can sit unused for up to 12 months without appreciableself-discharge occurring. Nevertheless, CAIRE recommends a first in,
first out rotation of Battery Pack inventory for maximum Battery Pack
service life.

Each Battery Pack contains multiple temperature sensors to monitor
battery cell temperature. The amount of heat the Battery Pack cansafely 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 Packis 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 withinthese limits, the eQuinox will resume normal operation. Operation nearthese temperature limits will not damage the Battery Pack, but are inplace 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 flow setting –higher flows induce greater Battery Pack heating. While high ambient
temperatures are typically the result of operation on a hot day, runningthe eQuinox with inadequate ventilation can also add additional
heat. Always ensure that the eQuinox is operated in a well-ventilated
space, the air intake filter is clean, and intake and exhaust vents areunobstructed.

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Personal Ambulatory Oxygen System Provider Technical Manual

Introduction
Welcome to the eQuinox, Personal Ambulatory Oxygen System with
autoSAT Technology. Setting up and training your patient to use theeQuinox has never been easier! You can expect your patients andcare providers to easily learn how to use the device by following thedirections in this section. While setting up and training a patient, besure 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 patientwith 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 SparePower 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 thefollowing:• 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 flow 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 yourpatient’s prescription when you deliver and set up the device.

Adjusting Rise TimeThe adjustable Rise Time feature on the eQuinox was designed forpatient comfort. The Rise Time feature adjusts flow and speed of bolusdelivery, and determines how quickly the patient receives their bolus
volume while in Pulse Dose Mode. The eQuinox offers delivery settingsof 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 theRise Time will not affect the chosen volume of oxygen delivered to thepatient (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 Indicator on the Control Panel illuminates.

Note:

If the Power Supply Status LED is not illuminatedafter inserting the plug into a outlet, check to makesure 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 specific country’s electrical service. Ensure that power cord isappropriate 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 theeQuinox, remove the plug from the AC outlet before
removing the AC Power Supply plug from theeQuinox.

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Personal Ambulatory Oxygen System Provider Technical ManualMonthly Maintenance—Patient
Care for the Battery Pack
The Battery Pack in the eQuinox requires special care to assure alonger life and the highest level of performance. The SeQual Battery
Pack is the only approved Battery Pack recommended for use with theeQuinox. 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 orsponge. First spray the cloth or sponge with a mild detergent and thenclean 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 cooland dry location.
Note:

The patient can still use the eQuinox while calibrating
the Battery Pack.
• If the Battery Pack temperature rises above 45°C
(113°F), the Battery Pack will not charge.

Note:• 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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Personal Ambulatory Oxygen System Provider Technical Manual

Annual Maintenance
Procedures
The following section lists procedures that are necessary to maintainthe eQuinox. Service should only be performed by a qualified
technician. To perform periodic maintenance, the only tools thatshould 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

Figure 8

2. Place finger under recessed area and pull outward.

Remove and Replace 9-Voly Battery andCompressor intake Filter
Replace the 9-volt battery when the unit beeps three times at the endof 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 fromthe rear panel.

Figure 9

3. Once the cover is removed, replace the 9-Volt Battery by pushingup slightly on the bottom of the battery and then pulling out.

Figure 7

Figure 1020771733 D 14

Personal Ambulatory Oxygen System Provider Technical Manual

4. Once the old battery is removed, insert the new 9-Volt battery byfollowing steps 1-3 in reverse.
Note:

The polarity of the 9-Volt battery does not have to bealigned in a certain manner when inserting the new
9-Volt battery.

5. Once the 9-Volt Battery has been replaced, the next step is toreplace the Compressor Intake Filter. To remove the Compressor
Intake Filter, push the metal tab on the end of the filter inward
and pull outward (similar to the process for removing the 9-Volt
Battery).
Figure 13

7. Push the filter inward towards the plastic housing and theninward towards the eQuinox, ensuring that the filter is sitting flush
against the plastic housing and flat against the rear case of theeQuinox.

Figure 11

Figure 14

8. Replace the back cover and retighten the two captive Phillipshead screws (5.5 in. lb max).
9. To replace the HEPA filter, locate the aluminum oxygen outlet on
the front of the unit.

Figure 12

6. To insert the new Compressor Intake Filter, align the end of thefilter with the inlet hole with the plastic housing on the eQuinox.

Figure 1520771733 D 15

Personal Ambulatory Oxygen System Provider Technical Manual

10. Slide a 3/8”or 10mm deep well socket over the aluminum
oxygen outlet, ensuring that the socket makes contact with thefitting on the boom of the oxygen outlet.

removed, remove the HEPA filter from the oxygen outlet by unscrewing the HEPA filter 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 filter.

Figure 16

11. Attach appropriate ratchet to the socket and loosen by rotating
the socket counter-clockwise until the oxygen outlet is free andremove. NOTE: Make sure that the black o-ring is removed when
taking out the oxygen outlet.

Figure19

14. Replace the oxygen outlet assembly by repeating steps 10-11 inreverse.
15. Next locate the Cabinet Inlet Filter and remove.

Figure 17

12. Once the oxygen outlet and HEPA filter assembly have been

Figure 20

16. Replace the Cabinet Inlet Filter with a new Cabinet Inlet Filter.

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Personal Ambulatory Oxygen System Provider Technical Manual

Assembly and Alarm Verification Tests
To ensure proper assembly and functionality of the eQuinox after it has
been reassembled, the following steps should be followed.

red Alarm Indicator is flashing 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. Confirm that
the External Power Present Indicator is illuminated.
9. Turn off 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 datesof service.

1. Install the Battery Pack into the Battery Pack compartment of
the eQuinox. Plug the AC Power Supply into the wall outlet andconnect it to the External Power Connector of the eQuinox.
2. Press the ON button and set the eQuinox to 2 LPM. At initialstart-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 off and the Yellow and Green remain on. Whenthe concentration reaches normal operating range (above 85%),
the Yellow LED will turn off. The Green LED will stay lit indicatingThis is required only for the eQuinox Oxygen System, that is used in anormal operation. Table 3 shows the normal start-up operating
hospital or institutional environment. This is not required for home careconditions for eQuinox Oxygen Systems. If LED is not green within use.
7 minutes there may be a problem with the eQuinox.
To test the basic electrical safety of the eQuinox AC Power Supply,
CAIRE recommends using an LKG-601 Electrical Safety Analyzer
Green
YellowRed
Audible Alarm Operating (Netech Corporation, Hicksville, NY) or equivalent to verify that the
Indicator Indicator Indicator Alarm code
Condition
current leakage to ground is within appropriate limits.

Electrical Safety Test

Off

Off

Blinking

Beeps

0004

Purity < 70%

OffBlinking

Off

Off

0008

Puritybetween 70%
and 85%

On

Off

Off

Off

0000

NormalOperatingCondition

Table 6

3. Verify that the Battery Pack is charging as indicated by the Battery
Pack Status Gauge is moving in waterfall fashion (scrolling frombottom 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 andobserve that the eQuinox buttons function normally.
5. Press the Delivery Mode button and set the eQuinox to thepatient’s normal Pulse Dose setting. Confirm 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, thesystem stops delivering Continuous Flow and waits 15 seconds
trying to detect a breath. The cycle continues until a breath isdetected.
6. After 5 minutes of operation, block the Cannula Fitting Outlet withyour finger for 2 minutes and confirm 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. Confirm that the Battery Pack Status
Gauge is illuminated and External Power Present Indicator is off.
8. Remove the Battery Pack and verify that the eQuinox alarms and

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 < 250µA (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 thecriteria in step 3, please return it to CAIRE for service.
6. EDAT may be utilized to record eQuinox device status and datesof service.

Cleaning the eQuinox
Clean inside the unit, as needed, using a small vacuum cleaner orbrush to remove any accumulation of dust or debris prior to attaching
the covers. After reinstalling the cover, verify that the rubber gasket isinstalled correctly.
Use mild detergent solution to clean the cabinet, Control Panel andpower supplies. Turn OFF the eQuinox and discon­nect from AC or DC
power before any cleaning or disinfection activity. DO NOT spray thecabinet Control Panel or power supplies. Use a damp (not soakingwet) cloth or sponge. Spray the cloth or sponge with a mild detergent
solution to clean the cabinet and power supplies. To disinfect theeQuinox, 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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Personal Ambulatory Oxygen System Provider Technical Manual

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 orrecorded in accordance with your company’s standard procedure. Whenever the case of the eQuinox is opened, the flow rate, purity, and alarm
status should be verified 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 file as the SN and/or the date serviced (example: 08D0110xxxx
08012000).

eQuinox Serial Number _________________________________________
Date

Hour meter
Reading

System Checkout
InitialsService Performed

PurityFlow

AlarmsComments

Table 7: Sample eQuinox maintenance record

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Personal Ambulatory Oxygen System Provider Technical Manual

Voice Module Operation
Voice Module Operational Instructions
The eQuinox is equipped with the capability of providing vocal
notifications 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.

Increase/Decrease the Volume of Vocal
Notifications
1. To increase or decrease the volume of vocal notifications, 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 five 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 whenaccessing the language options menu, “English” will be the textthat appears on the display.
3. Press the Increase or Decrease Flow Rate Key to scroll through thelanguages available.
4. Once the desired language is displayed, allow the units to sit andthe visible language will automatically be set in 3 – 5 seconds.

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 theselection 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 off and device is reset, thevoice module function will automatically be enabled.

20771733 D 19

Personal Ambulatory Oxygen System Provider Technical ManualeQuinox Voice Message Alert Descriptions TableeQuinox Voice Message Alert Descriptions
Condition

Standard eQuinox Voice Message

Message Repeat Interval

Flow rate error > +/- 10%“Low output flow. 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 instanceLow battery“Low on battery. Please plug in external
power.”

Message played every 29 seconds until loss of
power state.

Change in continuous flow setting“Continuous mode flow xx liter per minute.”

One instance(xx = [0.5L, 1.0L, 1.5L, 2.0L, 2.5L, 3.0L])
Change in pulse flow setting“Pulse dose mode xx milliliter.”

One instance(xx = [16mL, 32mL, 48mL, 64mL, 80mL, 96mL,
128mL, 160mL, 192mL])
Patient’s breath rate not detected“Cannot detect breathing.”

One instance

Loss of power to unit

“Loss of power. Please plug in external poweror 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.”

After start-up beep, on instance.

(xx = [16mL, 32mL, 48mL, 64mL, 80mL, 96mL,
128mL, 160mL, 192mL])
Unit is powered on in Continuous Mode andis using AC power supply.

“The device is running. External power
connected. Continuous dose mode xx liter
per minute.”

After start-up beep, on instance.

(xx = [0.5L, 1.0L, 1.5L, 2.0L, 2.5L, 3.0L])
Unit is powered on in Continuous Mode andis using battery.

“The device is running. Using battery.
Continuous dose mode xx liter per minute.”

After start-up beep, on instance.

(xx = [0.5L, 1.0L, 1.5L, 2.0L, 2.5L, 3.0L])
Unit is powered on in Pulse Mode and is using
battery.

“The device is running. Using battery. Pulse
dose mode xx milliliter.”

After start-up beep, on instance.

(xx = [16mL, 32mL, 48mL, 64mL, 80mL, 96mL,
128mL, 160mL, 192mL])
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 thebattery installed and the AC power supply isremoved.

“Using battery.”

One instance

When powering unit off.

“The device is now turned off.”

One instance

Table 820771733 D 20

Personal Ambulatory Oxygen System Provider Technical Manual

Troubleshooting, Service, and Repair Procedures
CAUTIONNote:

The eQuinox contains electrostatic sensitive
components. Do not open or handle except at a static
free workstation. Do not remove cover without ESD
protection.

To adequately troubleshoot and repair the productin the field, EDAT is recommended. eQuinox Data
Acquisition Tool (EDAT)

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Personal Ambulatory Oxygen System Provider Technical Manual

Alarm Conditions and Alarm Codes
Use the table below to decode eQuinox alarm conditions. If other alarm codes are displayed by the eQuinox, contact Technical Support forassistance.
Note:

The following table is intended as a guide for the provider, not the user.

Condition

Alarm
Code

Alarm
Display

Green
Indicator

Yellow
Indicator

Red
Indicator

Battery
Icon

AudibleAlarm

What to Do“9-Volt Battery”

0010

9V Low

N/A

N/A

N/A

N/A

“3 Beeps” at
Start-Up only

The internal 9-volt battery needs replaced

Warming Up

0004

O2<70%On

On

On

NormalOff

Wait - the system typically take 3-4 minutes to reach specified
performance

Warming Up

0008

O2<85%

On

On

Off

NormalOff

Wait - the system typically take 3-4 minutes to reach specified
performance“3.0” (or flow
setting)0

No Alarm

On

Off

Off

NormalOff

Nothing. The system is operating properly at the specified flow rate.

“Low Power
Cartridge”

1000

LOW BATOn

Flashing

Off

Flash
Outline2 Beeps

Plug into external power or replace with a Charged Power Cartridge.

“Warm Power
Cartridge”

0200

WARM BAT

On

Flashing

Off

Flashing

1 Beeps

Remove Power Cartridge and plug into external power or replace witha charged Power Cartridge“O2 Concentration- <85%”

0008

O2<85%

Off

Flashing

Off

NormalOff

Perform Annual Filter PM Maintenance. If condition persists, service isrequired.

“O2 Concentration- <70%”

0004

O2<70%

Off

Off

Flashing

Normal3 Beeps

Perform Annual Filter PM Maintenance. If condition persists, service isrequired.

“Flow Rate Error /Blocked Flow”

0020

FLOWRATE

Off

Flashing

Off

Normal

1 BeepCheck tubing and/or humidifier for obstruction. Check/Clean Air Intake
Filter. If condition persists past 10 minutes, service is required“Cannot Charge
Power Cartridge”

0100

CHARGER

Off

On

Off

Flashing

Off

Instruct patient to seek an external power source. Remove Power
Cartridge add allow to cool to room temperature, if Power Cartridge
malfunction persists, service is required.

“Communication
Loss”

0400

BAT COM

Off

Flashing

Off

Flashing

1 BEEP

Check Battery connections

Off

Make sure tubing does not exceed 7 ft (2.1m) when using Pulse Mode.
Unit will switch to continuous mode if no inspiration is detected for 15
seconds. After 15 seconds of continuous flow the unit will switch backto pulse flow and attempt to detect inspiratory effort“No Inspiration
Detected” (in Pulse
Mode only)0001

P<-->COn

Flashing

Off

Normal“Ambient Pressure
Fail”

0002

AMB PRES

Off

ON

Off

NormalOFF

Instruct the patient to power cycle the unit (i.e. Disconnect fromAC Power Supply, DC Power Cable, and remove the Battery Pack if
attached), wait for 1 minute, then reconnect to AC or DC power without
the Battery Pack engaged. If this does not correct, service is required.

“Reduced Flow
Due to Excess
Power Drain”

0800

FLOWRATE

Off

ON

Off

NormalOFF

When connected to DC power, disconnect all other electronic devices
connected to power circuit (GPS, Cell Phone Charger, etc). If not thecase, remove the Battery Pack from the device.

“DC Power Fail
(DC On and Off 3
Times)

2000

BAD DC

Off

ON

Off

NormalOFF

Ensure that the DC Power Cable is connected firmly into both thepower receptacle in the vehicle as well as the eQuinox. Also, disconnect
all other electronic devices connected to power circuit (GPS, Cell Phone
Charger, etc). If no success, Instruct patient to seek an alternativeoxygen supply until external power is restored“Loss of ExternalPower” *NOTE:
Stars will be
flashing in the LCD“********”

4000******
Flashing

Off

Off

Flashing

NormalConstant

Instruct patient to seek an alternative oxygen supply until external
power is restored or install a charged Power Cartridge.

“System Fault”

0080

FAIL XX

Off

Off

On

NormalConstant

10 seconds then silent, Instruct patient to use back up oxygen supply.
Service is required.

Table 920771733 D 22

Personal Ambulatory Oxygen System Provider Technical Manual

Malfunction Codes
If a malfunction occurs in the eQuinox, the device will stop, the Red LED on the front panel will light and the buzzer will sound for 10 seconds
and then silence. The LCD will display one of the following Malfunction Codes:
Malfunction

FAIL code

Recommended Action

Invalid RESET

FAIL 80

Check for secure communication cables, Verify functionality of PM and CS PCB

I/O Port Failure

FAIL 81

Check for secure communication cables, Verify functionality of PM and CS PCBRAM Failure

FAIL 82

Check for secure communication cables, Verify functionality of PM and CS PCBFLASH Failure

FAIL 83

Check for secure communication cables, Verify functionality of PM and CS PCBEEPROM Failure

FAIL 84

Check for secure communication cables, Verify functionality of CS PCB

IPC Watchdog Timeout

FAIL 90

Check for secure communication cables, Verify functionality of PM and CS PCB

Compressor Motor Temperature Sensor Failure

FAIL 91

Allow eQuinox to Cool for 30 Minutes. Check compressor fan functionality. Check to ensure vents are notobstructed. Verify functionality of the Compressor Assy. Check cable connections between the compressor
and the PM PCB

PCB Temperature Sensor Failure

FAIL 92

Allow eQuinox to cool for 30 Minutes. Verify functionality of PM fan. Check to ensure vents are notobstructed. Verify functionality of PM PCB

No Power to Compressor

FAIL 93

Check Compressor wires for damage. Verify functionality of PM PCB. Verify functionality of the Compressor
Assy

Compressor Motor Stalled

FAIL 94

Check Compressor wires for damage. Verify functionality of PM PCB. Verify functionality of the Compressor
Assy

Battery Communication Failure

FAIL 95

Verify functionality of the Battery Bridge PCB. Check Battery and Battery Bridge PCB for pin damage. Verify
functionality of battery. Verify functionality of PM PCB

PSS failure

FAIL 96

Power Failure

Boost Converter Failure

FAIL 97

Verify Functionality of PM PCB

Compressor motor too hot

FAIL 9A

PCB too hot

FAIL 9B

IPC Failure

FAIL A0

Verify functionality of PM PCB

Breath Pressure Sensor Failure

FAIL A2

Verify functionality of CS PCB

Ultrasonic Failure

FAIL A3

Verify functionality of CS PCB. Check for water intrusion from humidifier

Product Temperature Sensor Failure

FAIL A4

Verify functionality of DB9 cable harness. Verify functionality of CS PCB

Loss of Product Tank Pressure

FAIL A5

Check for leaking, cracked HEPA filter or damaged tubing. Verify ATF motor is turning

Purity Calibration Data Failure

FAIL A6

Check for leaking, cracked HEPA filter or damaged tubing. Verify functionality of CS PCB

Flow Calibration Data Failure

FAIL A7

Verify functionality of Proportional Valve. Verify functionality of CS PCBBreath Sensitivity Data Failure

FAIL A8

Check for damaged tubing. Verify functionality of CS PCBOver Current Failure

FAIL AB

Check power supply for sufficient current

Allow eQuinox to Cool for 30 Minutes. Check compressor fan functionality. Check to ensure vents are notobstructed. Verify functionality of the Compressor Assy.
Allow eQuinox to Cool for 30 Minutes. Check compressor fan functionality. Check to ensure vents are notobstructed.

Table 10

Step 1: Remove all power sources; battery and external power. Wait 20 seconds. Reconnect power to the eQuinox. Turn the device to the ON
position. If resolved, continue use.
Step 2: If unresolved, call Technical Support for assistance.

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Personal Ambulatory Oxygen System Provider Technical Manual

Proportional
Valve

Control
Board

Product Tank

IntakePort

ATF

Compressor
Assembly

Figure 22: eQuinox Internal Components

20771733 D 24

Personal Ambulatory Oxygen System Provider Technical ManualServicing the eQuinox
Note:sliding the top of the back cover over the top of the unit as
pictured below.

Prior to performing the following procedures, ESD
protection must be ensured. Do not touch exposed
circuits during maintenance without ESD protection.

Service should only be performed by a qualified technician. To performthe following procedures, the only tools that should be necessary are:• #1 Phillips Screwdriver• Wire-cutting pliers• Small cable ties
• ESD Mat or approved ESD system

I. Removing/Replacing the Back Cover
1. Disconnect power supplies and remove Battery Pack before
removing the unit cover.
2. Place the unit horizontally on the front cover.
3. Perform Steps 1-3 of the “Preventative Maintenance” Section.
4. After removing the compressor intake filter, remove the clear
rubber fitting that the filter would slide into by pulling upward.
NOTE: When replacing this rubber fitting, ensure that the rubber
fitting slides over the intake tube and fits properly.

Figure 25

7. Disconnect the 9-Volt Battery Cable, the 2 service port connectors
and the speaker connector.
9-Volt Battery
Connector
Service Port
Connectors

Figure 23

5. Using a Phillips #1 screwdriver, remove a total of 6 screws (M3x12
Phillips Head SEM Screw, P/N 6974-312-SEQ) from the back of theunit.

Qty 6 Phillips
Figure 24
Head Screws
6. Gently lift the back cover upwards from the bottom of the unit,

SpeakerConnector
Figure 26

8. The back cover is now completely disconnected from the unit. To
replace, repeat steps 1-5 in reverse order.

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Personal Ambulatory Oxygen System Provider Technical Manual

II. Removing/Replacing the Handle andSpeaker

5. Flip the top handle housing over and pull up on the handle toremove/replace.

1. To remove the speaker, after performing the “Removing/Replacing
the Back Cover” section, loosen the four allen-head screws
securing the speaker to the back cover.

Figure 30

6. To reinstall the top handle housing and speaker to the back cover,repeat steps 3-5 in reverse order.

III. Removing/Replacing the Back CoverFoam and Intake Muffler Section
Figure 27

1. Locate the Intake Muffler.

2. Remove the speaker and replace.
3. To remove/replace the top handle, locate the four Phillips Headscrews securing the handle housing to the back cover and using
a #1 Phillips Screwdriver, loosen by turning the screwdrivercounter clockwise until the four screws are released.

Figure 31

2. Gently pull upward on the aluminum tubing that feed into thefoam cover.

Figure 28

4. After removing the four Phillips Head screws, pull up on thehandle. This will remove the Top Handle housing from the backcover.

Figure 32

3. Gently remove the rubber elbow from the muffler tube.

Figure 2920771733 D 26

Personal Ambulatory Oxygen System Provider Technical Manual

IV. Removing/Replacing theCompressor Assembly
1. Remove the Top Exhaust Port by gently pulling upward.

Figure 33

4. Remove the Intake muffler from the foam section.
5. Gently lift up the foam section, while feeding the protruding wires
through the foam, and remove.

Figure 35

2. Remove the Bottom Exhaust Port by slightly lifting up on the
Exhaust Blower Outlet and pulling up the Bottom Exhaust Port.

Figure 34

Figure 36

6. To replace the foam section and intake muffler, repeat steps 1-5 inreverse order.

3. Disconnect the Compressor Assembly power connections circled
below.
Note:

Using tweezers or small pliers to grab the connector isrecommended.

Figure 37

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Personal Ambulatory Oxygen System Provider Technical Manual

4. Remove the aluminum intake tube from the black rubber elbow.

Figure 40

6. The Compressor Assembly can now be removed/replaced. To
replace the Compressor Assembly, repeat steps 1-5 in reverse
order.

Note:
Figure 38

5. Using a small utility knife, cut the two blue tubing pieces
connected to the ATF pictured below in Figures 38 and 39 anddiscard.
Note:

When installing the new Compressor Assembly, prior
to attaching the blue tubing to connect to the ATF,
use a cotton swab saturated with Isopropyl Alcohol
to swab the internal diameter of the blue tubing. This
will allow the blue rubber tubing to slide over thealuminum tubing easier.

Ensure that after the tubing has been removed
that the intake and vacuum ports on the ATF are
immediately capped to prevent damaging the ATF.

Figure 39

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Personal Ambulatory Oxygen System Provider Technical Manual

V. Removing/Replacing the ATF
1. To replace the ATF, Using a small utility knife, cut the two blue
tubing pieces connecting the ATF to the compressor as pictured
below in Figures 40 and 41 and discard.

3. Using a pair of small cutters, snip the end of the tie-wrap on thesoft tubing that connects the ATF to the Product Tank and discard
the tie-wrap.

Figure 41

Figure 44

4. Gently pull the soft tubing from the oxygen port on the ATF.

Figure 42

2. Gently lift the ATF so as to allow access to the Drive Motor power
connector. Disconnect the Drive Motor power connector.

Figure 45

5. The ATF can now be removed from the unit by gently lifting
upward. To install a new ATF, follow steps 1-4 in reverse order.

Note:

Ensure to reinstall the tie-wrap on the soft tubing
connecting the ATF to the Product Tank. Also, prior
to attaching the blue tubing to connect to theCompressor Assembly, use a cotton swab saturated
with Isopropyl Alcohol to swab the internal diameterof the blue tubing. This will allow the blue rubber
tubing to slide over the aluminum tubing easier.

Figure 4320771733 D 29

Personal Ambulatory Oxygen System Provider Technical Manual

VI. Removing/Replacing the ProductTank
1. Using a pair of small cutters, snip the end of the tie-wrap on thesoft tubing that connects the ATF to the Product Tank and discard
the tie-wrap.

3. Using a pair of small cutters, snip the end of the tie-wrap on thebottom of the clear rubber elbow that connects the Product Tank
to the aluminum tubing going to the flow tube on the Control
Board.

Figure 48
Figure 46

2. Gently pull the soft tubing from the oxygen port on the ATF.

4. The Product Tank can now be removed by gently pulling upward.
To install a new Product Tank, repeat steps 1-3 in reverse.

Note:

Ensure to reinstall the tie-wrap on the soft tubing
connecting the ATF to the Product Tank as well as theclear rubber elbow that connects to the aluminum
tubing going to the flow tube on the Control Board.

Figure 47

20771733 D 30

Personal Ambulatory Oxygen System Provider Technical ManualVII. Removing/Replacing the
Proportional Flow Valve

3. Disconnect the Proportional Valve electrical connector from thecontrol board.

1. Using a pair of small cutters, snip the end of the tie-wrap on thesoft tubing connecting the Proportional Valve to the Oxygen
Outlet/HEPA Filter housing and gently pull on the tubing todisconnect the tubing from the barb fitting.

Figure 51

4. The Proportional Valve can now be removed by gently pulling
upward. To install a new Proportional Valve, follow steps 1-3 inreverse order.
Figure 49

2. Using a pair of small cutters, snip the end of the tie-wrap on thesoft tubing connecting the aluminum tubing to the Proportional
Valve. Gently pull on the soft tubing to remove from the
Proportional Valve.

VIII. Removing/Replacing the Rubber
Gasket Seal
1. To remove the Rubber Gasket Seal that separates the Top Coverand Bottom Cover, gently pull upward on the gasket seal andwork free from the unit.

Figure 50

Figure 52

2. When removing the Rubber Gasket Seal, the square tab thatfits over the AC Power connection will have a small amount ofadhesive applied at the factory. When removing this portion, lift
up with pressure but carefully not to damage the gasket.
Note:

When reinstalling the Rubber Gasket Seal, use a small
amount of sealant on this area to prevent the sealfrom breaking free.

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Personal Ambulatory Oxygen System Provider Technical Manual

IX. Removing/Replacing the Top CoverFoam Section
1. Carefully lift the Top Cover Foam Section upward at different
locations around the unit, ensuring that all harness wires, cables
and tubing are not damaged. This may require tilting, adjusting,turning, etc., the Top Cover Foam section to free from the unit.

Figure 53

3. To reinstall, or install a new, Rubber Gasket Seal, align the tabs on
the gasket with the correct tabs on the Front Cover and press
down firmly.

Figure 54

Figure 55

Figure 56

2. Once all of the harness wires, cables and tubing are free of the Top
Cover Foam Section, the section can be removed.
3. To replace the Top Cover Foam Section, ensure that all harness
wires, cables and tubing are fed through the Top Cover Foam
Section without binding, kinking or damaging, press firmly downon the section ensuring that the section is aligned properly and isflush with the Top Cover.
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Personal Ambulatory Oxygen System Provider Technical Manual

X. Removing/Replacing the Control Board, Power Manager Board, Voice System
Board, Battery Bridge Board, Membrane Panel and Wire Harness Assemblies
1. Once the Top Cover Foam Section has been removed, the Control Board, Power Manager Board, and Wire Harness Assemblies are now accessible.
Speaker Wire
Harness

Power Manager
Board/Control
Board/Battery
Bridge Board
Wire Harness

Control
Board
PowerManager
Board toBattery Bridge
Board Wire
Harness #1

Service
Port Wire
Harness #1

9-VoltBattery
Wire
Harness
Main Power
Wire Harness
Power
Manager
Board toBattery
BridgeBoard
Wire
Harness#2

Service
Port Wire
Harness #2

PowerManagerto ATF Wire
Harness
Power
Manager
Board

Figure 57

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Personal Ambulatory Oxygen System Provider Technical Manual

2. To remove the Power Manager Board, the first step is to cut the tie-wraps that are attaching the two Service Port Wire Harnesses and 9-Volt
Wire Harness to the Power Manager Board. Using a pair of small cutters, snip the end of the two tie-wraps.

Figure 58

Figure 59

3. Next, disconnect all Wire Harness Assemblies that are attached to the Power Manager Board. These Harness Assemblies are circled below.
The Power Manager Board to ATF Wire Harness will also need to be removed if replacing the Power Manager Board.

Main
Power Wire
Harness

Power Manager
Board to Battery
Bridge Board
Wire Harness #1

9-Volt Battery
Wire Harness

Power Manager
Board to Battery
Bridge Board
Wire Harness #2

PowerManager
Board/Control
Board/Battery
Bridge Board
Wire Harness

Figure 60

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Personal Ambulatory Oxygen System Provider Technical Manual

4. Once the Wire Harnesses have been disconnected, the next step isloosen the two sets of Jumper Wires that attach from the Battery
Bridge Board to the Power Manager Board. To do this, use a small
Flat-Head screwdriver, loosen the four fastening screws pictured
below and gently pull the four wires free of the connector slots.

Figure 63

Figure 61

8. After removing the soft tubing, the next step is to disconnect theBattery Bridge Board to Control Board Wire Harness by gently
pulling the connector from the Control Board.

5. Once the Wire Harnesses and Jumper Wires have been
disconnected, the next step is to remove the 5 Phillips HeadScrews that attach the Power Manager Board to the Front Cover.

Three
Screws

7. To remove the Control Board, the first step is to disconnect thesoft tubing that is connected to the Oxygen Outlet/HEPA Filter
housing by gently pulling the tubing free.

TwoScrews(notvisibledue totubing)Figure 64

Figure 62

BUMP STOP

6. The Power Manager Board can now be removed by gently lifting
the Power Manager Board upward away from the unit. To replace
the Power Manager Board, repeat steps 1-5 in reverse ordermaking sure connections are properly seated and that Bump Stop
has been reinstalled.
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Personal Ambulatory Oxygen System Provider Technical Manual

9. Next, Disconnect the Power Manager Board/Control Board/Battery
Bridge Board Wire Harness from the Control Board by gently
pulling the connector from the Control Board.

FIGURE XX

12. The Control Panel can now be removed by gently lifting upwardon the Control Board. To replace the Control Board, repeat steps
7-11 in reverse order.
13. In order to remove/replace the Membrane Panel, the Control
Board must be removed. Once the Control Board has been
removed, rotated the Front Cover over so as to have access to theMembrane Panel.
14. Insert a small Flat Head screwdriver under the Membrane Panel,prying upward, and work around the outer edge of the panel
to break away the adhesive that secures the panel to the Front
Cover.

Figure 65

10. Next, remove the two Phillips Head Screws that attach theControl Board to the Top Cover.
Figure 67

15. Pull the Membrane Panel upward, making sure that theconnector is fed through the opening on the Top Cover.
16. Once the Membrane Panel is removed, use Isopropyl Alcohol
to clean any residual adhesive remaining on the Front Panel andallow to dry completely.
17. Obtain a new Membrane Panel and peel off the protective
cover off of the backside of the Membrane Panel, exposing theadhesive.
Figure 66

11. Next, gently lift the Control Board upward and disconnect the
Membrane Panel Connector.

Figure 68

18. Once the protective has been removed, feed the connector
through the slot in the Top Cover and align the Membrane Panelwith the recess on the Top Cover and press down firmly.

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Personal Ambulatory Oxygen System Provider Technical Manual

Note:

Anytime that the Membrane Panel is removed, it must
be replaced with a new Membrane Panel.

23. Place the Battery Bridge Board Installation Fixture into the front
cover, just as if a battery pack was being installed.

19. Reconnect the Membrane Panel connector to the Control Board.
20. To remove the Battery Bridge Board, the Power Manager Board,
first loosen the four Phillips-Head Screws that attach the Battery
Bridge Board to the Front Cover.
Note:

In order to remove the Battery Bridge Board, thePower Manager Board must be removed.

Figure 70

24. Once the Battery Bridge Board Installation Fixture has been
inserted into the Battery pack slot in the Front Cover, install thetwo “shims” that are provided with the Battery Bridge Board
Installation Fixture.

Figure 69

21. Once the four screws have been removed, the Battery Bridge
Board can removed by gently lifting the Battery Bridge Board
upward.
22. To install a Battery Bridge Board, the Battery Bridge Board
Installation Fixture must be used.

Figure 71

25. Once the “shims” for the Battery Bridge Board Installation Fixture
have been installed, rotate the front cover back over and install
the Battery Bridge Board. Ensure that the Male connectors on
the Battery Bridge Board are aligned properly with the Female
connectors on the Battery Bridge Board Installation Fixture forproper alignment after installation.
26. Insert the four Phillips Head screws into the Battery Bridge Board
and Tighten to 5.5 in. lbs.
27. To remove the Voice System Board, disconnect the Service Port
Wire Harness #2 and the Speaker Wire Harness from the Voice
System Board.

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Personal Ambulatory Oxygen System Provider Technical Manual

Figure 72

Figure 73

28. Remove the four Phillips Head screws that are used to attach the
Voice System Board to the Front Cover.

Figure 74

29. Once the four screws are removed, the Voice System Board canbe removed by gently lifting upward on the Voice System Board.
30. To reinstall, or install a new Voice System Board, follow steps 2728 in reverse order.

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Personal Ambulatory Oxygen System Provider Technical ManualParts List
Contact Customer Service or visit
www.cairemedical.com
to obtain your parts list.

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Personal Ambulatory Oxygen System Provider Technical Manual

Optional Accessories
Visit us at www.CAIREmedical.com for more information about optional
accessories. There are many different types of oxygen tubing, cannula,and humidifiers. The following items are recommended by CAIRE Inc.
for use with the eQuinox.
Salter Labs® Humidifier, Part Number HU003-1, or equivalent:
If your physician has prescribed an optional humidifier, follow the
manufacturer’s instructions for use. Attach the humidifier to theoxygen outlet port of the eQuinox. Use of optional humidifiers notrecommended for the eQuinox may impair performance of the device
and may void the warranty.
DO NOT use a humidifier in the Pulse Flow Mode. The eQuinox will
not detect inspiratory effort. The device will alarm and default to theContinuous Flow Mode for continuing operation after 15 seconds.
CAIRE Humidifier Adapter – Part Number 7116-SEQ: If yourphysician has prescribed an optional humidifier, you may need to use
the CAIRE Humidifier Adapter. Follow the instructions for use. Attach
the Humidifier Adapter to the oxygen outlet port of the eQuinox andthen to the humidifier. Attach the cannula, or oxygen tubing to thehumidifier outlet.
Salter Labs Oxygen Supply Tubing, Part Number Series 2000, or
equivalent: The internal diameter should be no less than 3/16” (0.48cm). Connect the oxygen tubing to the outlet port of the humidifier,or directly to the oxygen outlet port of the eQuinox if you do not use
a humidifier. Connect the other end of the tube to the nasal cannula,if oxygen supply tubing is not already attached to the cannula. Tubing
not specified for use with this eQuinox may impair the performance ofthe device.
Salter Labs Oxygen Cannula, Part Number 1600 Series, or
equivalent: Your physician will have prescribed a cannula to deliver
oxygen. In most cases they are already attached to the oxygen tubing.
If not, follow the instructions included with the cannula to attach it tothe oxygen tubing. Use of an oxygen cannula not specified for use withthis eQuinox may impair the performance of the device.

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CAIRE Inc. Customer Service Contact Information
If you need any additional assistance, contact CAIRE Inc:

By mail:
CAIRE, Inc.
2200 Airport Industrial Drive, Suite 500
Ball Ground, GA 30107 USA
By telephone: 800.482.2473
www.CAIREmedical.com

Authorized European Union Representative:
Medical Product Service GmbH
Borngasse 20
35619 Braunfels, Germany
www.CAIREmedical.com

SeQual®, ATF® and eQuinox® are registered trademarks of CAIRE Inc.
Lysol® is a registered trademark of Reckitt Benckiser, UK.
Loctite® is a registered trademark of Loctite Corporation, USA.

Copyright © 2019 CAIRE Inc. CAIRE Inc. reserves the right to discontinue its products, or change the prices, materials,
equipment, quality, descriptions, specifications and/or processes to its products at any time without prior notice andwith no further obligation or consequence. All rights not expressly stated herein are reserved by us, as applicable.

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