1
HELiOS Portables Technical Service Manual • PN 20562190 Rev E
25
HELiOS P
or
tables
Troubleshooting & Repair Procedures
XI
Table 6 below provides troubleshooting procedures for the HELiOS portables. This guide is not all-inclusive but is intended to serve
as a general outline for solving operational problems. The table describes symptoms, identifies probable causes, and suggests correc-
tive actions.
When more than one probable cause is identified, the causes are listed in order of most likely to least likely reasons for the problem.
Table 6:
Troubleshooting
Symptom
Probable Cause
Corrective Action
1) Unable to start fill or
excessively long fill
times
a) QDV not properly engaged on the reser-
voir
Make sure the QDV on the portable and reservoir are
properly aligned and ensure that a downward force is
being applied to the portable.
b) Reservoir is empty
Swap or re-fill the reservoir
c) Vent valve not open
Ensure that the vent valve lever is fully in the open
position. The lever must be open to begin a fill.
d) FCV is open
Be sure that the FCV knob is in the off (“0”) posi-
tion. If the valve is open, fill times can increase.
e) Reservoir saturation pressure is too low
Swap reservoirs or allow the reservoir time to stabi-
lize and build pressure
f) Vent valve is obstructed
Inspect the vent tubes for blockages. Clean by blow-
ing out with compressed gas or replace parts if nec-
essary.
g) Leak in the system
Check the portable for leaks (RP2) and repair if
needed.
h) QDV damaged or faulty
Inspect the QDV and be sure the poppet opens prop-
erly and smoothly. If necessary, replace the QDV
assembly (RP17)
i) Faulty vent valve
Replace the vent valve (RP15)
2) Liquid leaks from the
coupled QDVs during
the fill
a) Worn or damaged lip seal
Replace the QDV lip seal (RP18)
3) Unable to disconnect
the portable from the
reservoir
a) Pop-off assembly not being utilized
Ensure that the pop-off assembly on the reservoir is
being used. Do not use force to separate the QDVs.
b) QDVs are frozen together
Leave the units coupled with the vent valve closed
and let them sit until they warm up enough to discon-
nect. Always ensure that male and female QDV’s
are cleaned and dried prior to each fill.
