CAIRE HELiOS Plus Technical & Service Manual page 28

XI 1
Troubleshooting & Repair Procedures
Symptom
f)
g) FCV inlet filter is obstructed
h)
i )
8) Low flow at all
a) Nasal cannula kinked or leaking
LPM settings
b) Saturation pressure is too low
c) Leak in the system
d)
e) Economizer valve faulty
f)
g) FCV faulty
9) Unit stops pulsing in
a) Cannula is disconnected
demand mode
b) Cannula is blocked or kinked
c)
d)
e)
f)
g) Faulty FCV
Table 6 (cont.)
Probable Cause
Vent valve is open
Blockage in the liquid withdrawal
circuit
FCV Faulty
Flow control valve inlet filter
screen dirty
Blockage in the liquid withdrawal
circuit
Cannula tips not positioned prop-
erly in the nose
Patient is breathing with their
mouth open.
Saturation pressure is out of
specification
Leak in the system
Corrective Action
Ensure that there is no venting from the vent valve outlet/tube. If
there is refer to the corrective actions for "Liquid leaks from the
vent valve tube/outlet"
Clean or replace (RP21) the filter screen.
Check the warming coils and withdrawal tubes for blockages.
Replace if necessary.
Replace the FCV (RP20)
Inspect the functionality of the nasal cannula.
Inspect the saturation pressure of the reservoir used for filling.
Allow at least 30 minutes at no flow for the portable to saturate
properly.
Perform a leak check on the plumbing (RP2). Repair leaks as
necessary.
Clean or replace (RP21) the filter screen.
Test the economizer (RP9) and replace (RP10) if necessary.
Check the warming coils and withdrawal tubes for blockages.
Replace if necessary.
Replace the FCV (RP20)
Ensure the nasal cannula is firmly attached to the barb(s).
Inspect the cannula for kinks, bends, or water droplets. Replace
the cannula if necessary.
Ensure the cannula remains in the nostrils and do not slide to one
side.
Patient must inhale through their nose to initiate pulse/demand
flow.
Reference symptom 14). Inspect the saturation pressure of the res-
ervoir used for filling. Allow at least 30 minutes at no flow for the
portable to saturate properly.
Perform a leak check on the plumbing (RP2). Repair leaks as
necessary.
Test the FCV (RP19) and replace if necessary.
HELiOS Portables Technical Service Manual • PN 20562190 Rev E
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