16
17
TROUBLESHOOTING
Symptom
Cause
1. Gas leakage at the line regulator outlet when the
adjusting knob of the line regulator is completely
backed out.
2. With no flow through the system (downstream
valves closed and adjusting screw in) line pressure
steadily increases above set pressure.
3. Gas leakage from spring case (adjusting screw/
knob end of regulator).
4. Gas leakage from any joint.
5. Excessive drop in working pressure with regulator
flowing gas.
6. Gas leakage from relief valve.
7. Gas leakage from any gauge.
8. Gauge does not return to zero when not under gas
pressure.
9. Gauge does not consistently repeat the same
reading.
10. The system makes a noise or hums.
1. Regulator(s) have malfunctioned. Replace or
repair.
Symptom
Cause
1. Switchover system seems to be using gas from
the primary
and
reserve cylinders (pressure is
decreasing on both inlet gauges at the same time).
1. Make sure the priority valve knob is turned fully
to the right or left.
2. Observe the inlet pressure. It may be necessary
to do this during times of the heaviest use. If the
inlet pressure is less than the values listed below,
replace the high pressure cylinders.
621 3XXX 265 PSI (18 BAR)
621 5XXX 540 PSI (37 BAR)
621 7XXX 625 PSI (18 BAR)
If liquid cylinders are used and the inlet pressure
increases significantly when the system is not
in use, then the system is over-withdrawing the
liquid cylinders. Additional capacity may be
added to the system to prevent this.
1. Inlet gauges not reading pressure.
1. Check that the valves on the cylinders are opened.
2. If using a manifold system, check that the valve on
the manifold is opened.
1. Power light is not on.
1. Check that connector to remote alarm is properly
plugged into the autoswitch and the alarm.
2. Check that the remote alarm is powered on.
3. Check that cable between autoswitch and remote
alarm is wired correctly.
