13
9.1 Troubleshooting
Fault Cause Troubleshooting
Assembly not possible
Impossible assembly of the connections
Verify the compatibility with gases, inlet and
outlet
Dammaged connection Change the connection
Insufficient output of gas
Cross section passage limited by a valve. Open the valve
Insufficient filled or empty cylinder Change the cylinder
Not operating valve Change the cylinder
Under-dimensioned equipment Contact AIR LIQUIDE
Equipment in output not operational Change the equipment
The gas source in
reserve drains without
being used (Change
over only)
Occasional over consumption Replace by an equipment with a lower output
Leakage Check out the gas tightness
Leakage at the main valve of the regulator Replace the main valve or the regulator
At the same pressure and
output entry, the outlet
pressure is not the same
which side you are using
Disturb regulators Adjust the regulators
Gas comes out of the
relief valve
Leakage at the flap of the regulator Replace the regulator
Defect relief valve Replace the relief valve
Frosting
Too low working pressure
Close the cylinder valve. Increase the temper-
ature of the equipment above 0 °C
The used gas is argon (Ar), carbon dioxide
(CO
2
) or nitrous oxide (N
2
O)
Mount an heater at the inlet
The outlet pressure
decreases
Output flow too high
Respect the regulator flow. Limit the flow by
using a valve or a calibrated orifice.
Vibrations
Output flow too high
Presence of a valve with rapid opening on the
outlet pipe.
Limit the flow by using a valve or a calibrated
orifice.
In case of malfunctions such as:
• Increase in back pressure without removal,
• leakages of the manifold or the outlet valves,
• visible damage,
• response of the relief valve on the pressure regulator,
• response of a safety valve,
the system must be taken out of operation immediately in
accordance with chapter 7.3 and a service technician must
be informed.
9 Instructions for operation and maintenance
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