CAIRE HELiOS Plus Technical & Service Manual page 27

XI 1
Troubleshooting & Repair Procedures
Symptom
4) Liquid leaks from the
QDV poppet after filling
5) Liquid leaks from the
vent valve tube/outlet
6) Excessive venting from
relief valves (hissing
sound)
7) No Flow
Table 6 (cont.)
Probable Cause
Ice crystal preventing the QDV
a)
from closing properly.
b) Dirty or damaged QDV poppet
a) Vent valve is not fully closed
The portable has been trans-
b) ported or laid in an improper
operating position
c) Vent valve is frozen open
d) Faulty vent valve
The portable has been trans-
a) ported or laid in an improper
operating position
b) Saturation pressure too high.
c) Relief valve frozen open
d) Faulty relief valve
Partial or complete loss of
e)
vacuum
a) Portable is empty
b) Flow control valve turned off
Nasal cannula kinked or discon-
c)
nected
d) Saturation pressure is too low
e) Leak in the system
Corrective Action
Engage and disengage the portable onto the reservoir several
times to dislodge the ice crystal. Always be sure that the male
and female QDVs are wiped clean and dry before filling.
Replace the QDV assembly (RP17)
Ensure that the vent valve lever is fully in the closed position.
Return the portable to an upright or acceptable operating posi-
tion and allow several minutes for stabilization.
Allow the portable to warm until the vent valve can close.
After the warm up, allow up to 60 minutes for the portable to
stabilize and build pressure before operating.
Replace the vent valve (RP15)
Return the portable to an upright or acceptable operating posi-
tion and allow several minutes for stabilization.
Inspect the saturation pressure of the reservoir used for filling.
Allow at least 30 minutes at no flow for the portable to satu-
rate properly.
Allow the portable to warm and thaw. Attempt to re-fill the
portable.
Test the relief valve (RP7 & RP8) and replace if necessary
(RP10 & RP11)
Conduct the NER test (RP22) and return the unit to CAIRE,
inc. if necessary.
Check the contents indicator/level gauge and fill the portable
if needed.
Ensure the flow control knob is not in the off ("0") position.
Ensure proper nasal cannula functionality and positioning
Inspect the saturation pressure of the reservoir used for filling.
Allow at least 30 minutes at no flow for the portable to satu-
rate properly.
Perform a leak check on the plumbing (RP2). Repair leaks as
necessary.
HELiOS Portables Technical Service Manual • PN 20562190 Rev E
26