SERVICE
BULLETIN
PN: 21145161

RELEASE DATE:May 1, 2017

REVISION DATE(S): January 21, 2019 Rev B
November 22, 2019 Rev CFebruary 1, 2020 Rev D
MODEL:

Companion 5™

ISSUE:

Preventative maintenance for Companion 5 filters.

NOTES:

Companion 5 oxygen concentrators manufactured from May 2017 January 20, 2020 feature a multi-position airflow system as shown below.
Companion 5 concentrators manufactured after January 20, 2020, startingwith serial number CBB6920040033, will no longer include the handle
intake location and will only have the bottom air intake filter (cartridge)
and bottom gross particle filter.
See bulletin PN 21494442 for detail on the top handle filter removal.

Figure 1. Companion 5 Air Flow.
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Note: The gross particle handle filter is optional for units manufactured
between May 2017 – January 20, 2020. You may remove and discard it
upon receipt. A screen within the handle serves as an additional level offiltration that is sufficient if the gross particle filter is removed. The grossparticle filter is simply an optional added layer of protection you may
choose to utilize for harsh environments. Units produced prior to May
2017 and after January 20, 2020 do not have the intake located in thehandle and do not include a handle gross particle filter.

Figure 2: Top Gross Particle Filter (left) and Bottom Gross Particle
Filter (right).
Preventative Maintenance Procedures for Companion 5 Filters.
1. Air Intake Filter (bottom cartridge)
Replace every 2 years, as needed if unit is in a harsh environment, or ifconcentration is ~80 - 87%.

Figure 3. Air Intake Filter (cartridge). Located under filter cover.
Customers may follow the below procedure if experiencing O2
concentration between 80-87%, particularly when the bottom filters arevisibly occluded:

Ref 21145161 Rev DPage 2 of 4

1. Turn on device and allow 15 minutes to warm-up.
2. Measure O2 concentration with a calibrated O2 analyzer.
3. If unit is producing O2 concentration below 87%, replace intake
filter cartridge with clean filter. A device producing below ~80%
O2 likely will not be improved by a filter change. For units
producing <80%, contact CAIRE for an RMA to return the device
for service at an authorized repair facility.
4. Allow another several minutes to see if O2 improves.
5. If the O2 does improve, the intake filter cartridge was the cause.
6. If the O2 does not improve, contact CAIRE for an RMA to returnthe device for service at an authorized repair facility.
Note : It is recommended to replace filter the Bottom GrossParticle Filter when replacing the Air Intake Filter Cartridge.
2. Optional Top Gross Particle Filter (if unit is equipped with one.)
The patient should clean the top gross particle filter with warm soapy
water. Replace filter as needed. The filter may require more frequentcleaning in harsh environments. This filter can be equipped on units
produced May 2017 – January 20, 2020. See figure 4.

Figure 4. Optional Top Gross Particle Filter. Located in the top handle.

3. Bottom Gross Particle Filter (equipped on units after May 2017)
The bottom gross particle filter should be replaced at least every 2 years or
as needed. This filter is equipped on units produced after May 2017 (thisfilter stayed on units even after the top intake was removed). See figure 5.
Please follow the below procedure when cleaning both the top grossparticle filter and the bottom gross particle filter:
1. Remove dirty filter from inside unit handle.
2. Wash dirty filter in warm soapy water and rinse thoroughly.
3. Use a soft, absorbent towel to remove excess water.
4. Ensure filter is completely dry before reinstalling in the unit.
Ref 21145161 Rev D

Page 3 of 4

5. Reinstall clean filter in handle. Replace with new filter as needed.

Maintenance Procedure for bottom gross particle filter (for providers
only):
1. Remove dirty gross particle filter from bottom of unit.
2. Install new, clean filter. See figure 5.

Figure 5. Bottom Gross Particle Filter. Located in front of compressor
intake on bottom of unit.

CONTACT:For technical questions or concerns, contact Technical Service:USA:

800-482-2473

Techservice.global@caireinc.com
Europe:+44 (0) 118 936 7060

Techservice.global@caireinc.com
For ordering information or general inquires, contact Customer Service:USA:

800-482-2473

Customerservice.usa@caireinc.com
Europe:+44 (0) 118 936 7060

Customerservice.europe@caireinc.com

Copyright © 2020 CAIRE Inc. CAIRE Inc. reserves the right to discontinue its products, or change theprices, materials, equipment, quality, descriptions, specifications and/or processes to its products at any
time without prior notice and with no further obligation or consequence. All rights not expressly statedherein are reserved by us, as applicable.
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