SERVICE
BULLETIN
PN: 21190303

RELEASE DATE:

August 29, 2017

REVISION DATE(S): NovembeU 8 2017 (Rev B), March 11, 2019 (Rev C)
MODEL:

VisionAire 5 Oxygen Concentrators

ISSUE:

Change to VisionAire Main Circuit BoardNOTES:

Effective September, 2017 the VisionAire 5 main circuit board
will change entirely from item CB151-1 to CB078-1 (for 115V models)and CB078-2 (for 230V models). CB078 has been used on some 120V
models since Sept 1st, 2014 and will now be extended to all models of theVisionAire 5.
The updated board will no longer have the temperature sensor probe
connection and as a result the 5 beep high temperature alarm will nolonger be featured on VisionAire units made with these updated boards.
The VisionAire units have a thermal protection switch attached to thecompressor stator that will shut down the compressor in the event thecompressor overheats (this switch activates at 145°C). For these newer
units, the overheating condition will cause this thermal switch to shut
down the compressor, which results in low system pressure and the 3 beep
low pressure alarm.

Figure 1. Circuit board comparison
Ref 21190303 Rev CPage 1 of 5

CB078 circuit boards may be used for all service parts and can be
retrofitted into VisionAire 5 models that were originally built with CB151
or CB102 circuit boards. CB151 or CB102 boards should not be installedin units designed to use CB078, as the unit will need an additionaltemperature sensor and may not meet RoHS 2 or electromagnetic
interference compliance if older boards are used. CB151 boards can still
be used in units that were originally equipped with CB102 or CB151
boards (while supplies last).
Instructions to replace previous circuit board with current CB078-1 or CB078-2
Note: be sure to use proper electrostatic discharge protection prior to handling any
circuit boards on the device.
Step 1: Remove front panel.
Step 2: Pull the compressor enclosure out from the center section as for as possible (mayrequire disconnecting pressure feed tubes to sieve beds)

Figure 2. CB151 or CB102 style circuit board
Step 3: Disconnect the pressure sensor tube and all wires connecting the circuit board
except the valve wire harness. Remove and discard the temperature probe (may require
removing the compressor enclosure cover).

Ref 21190303 Rev C

Page 2 of 5

Figure 3. Board connections removed
Step 4: Remove the three circuit board screws and then disconnect the valve wire harness.

Figure 4. Screws and valve wire harness disconnected
Step 5: Connect replacement circuit board to the valve wire harness.

Ref 21190303 Rev C

Page 3 of 5

Figure 5. Valve wire harness connected

Step 6: Reinstall the three circuit board screws

Figure 6. Screws re-installed
Step 6: Connect the pressure sensor tube and all remaining wiring connections to thecircuit board. Reinstall front panel.

Ref 21190303 Rev C

Page 4 of 5

CONTACT:

For technical questions or concerns, contact Technical Service:USA:
800-482-2473
www.cairemedical.com
Europe:+44 (0) 118 936 7060
www.cairemedical.com
For ordering information or general inquires, contact Customer6HUYLFH
USA:
800-482-2473
www.cairemedical.com
Europe:+44 (0) 118 936 7060
www.cairemedical.com

Copyright © 2019 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 anytime without prior notice and with no further obligation or consequence. All rights not expressly statedherein are reserved by us, as applicable.

Ref 21190303 Rev C

Page 5 of 5