CAIRE HELiOS Plus, Техническое и сервисное руководство

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HELiOS Portables Technical Service Manual • PN 20562190 Rev E
28
HELiOS P
or
tables
Troubleshooting & Repair Procedures
XI
Table 6 (cont.)
Symptom
Probable Cause Corrective Action
10) Flow stops sud-
denly on con-
tinuous setting
NOTE: For continu-
ous flow to continue
a inhalation must
be detected periodi-
cally. Refer to the
Theory of Operation
section of this
manual for more in-
formation.
a) Cannula is disconnected
Ensure the nasal cannula is firmly attached to the barb(s). Must be
using a dual lumen cannula connected to both ports.
b) Cannula is blocked or kinked
Inspect the cannula for kinks, bends, or water droplets. Replace
the cannula if necessary.
c) Cannula tips not positioned prop-
erly in the nose
Ensure the cannula remains in the nostrils and do not slide to one
side.
d) Patient is breathing with their
mouth open.
Patient must inhale through their nose to initiate continuous flow.
e) Saturation pressure is out of
specification
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.
f) Faulty FCV Test the FCV (RP19) and replace (RP20) if necessary.
11) Unit flows continu-
ously on demand
settings
a) Saturation Pressure is too high
Inspect the saturation pressure of the reservoir used for filling.
Allow at least 30 minutes at no flow for the portable to saturate
properly.
b) Faulty FCV Test the FCV (RP19) and replace (RP20) if necessary.
12) Increased NER
a) Saturation Pressure is too high
Inspect the saturation pressure of the reservoir used for filling.
Allow at least 30 minutes at no flow for the portable to saturate
properly.
b) Leak in the system
Perform a leak check on the plumbing (RP2). Repair leaks as nec-
essary.
c) Relief valve open
Ensure that there is no venting from the relief valves. If there is
refer to the corrective actions for “Excessive venting from relief
valves (hissing sound)”
d) Partial or complete loss of vac-
uum
Conduct the NER test (RP22) and return the unit to CAIRE, Inc. if
necessary.
13) Excessive Frost
NOTE: Minimal
frost on the case and
on the plumbing is
normal. This symp-
tom applies to frost
that is much greater
than what is nor-
mally observed.
a) Frost is acceptable
Some frost on the outer case and on the plumbing is acceptable,
especially at high flow rates during continuous use. This is due to
the evaporation of LOX to gas and the temperature difference be-
tween the LOX and room temperature.
b) High humidity level High humidity levels can increase frost accumulation.
c) Saturation pressure is too high
Inspect the saturation pressure of the reservoir used for filling.
Allow at least 30 minutes at no flow for the portable to saturate
properly.
d) Leak in the system
Preform a leak check on the plumbing (RP2). Repair leaks as nec-
essary.
e) Relief valve open
Ensure that there is no venting from the relief valves. If there is
refer to the corrective actions for “Excessive venting from relief
valves (hissing sound)”
f) Partial or complete loss of vac-
uum
Conduct the NER test (RP22) and return the unit to CAIRE, Inc. if
necessary.