8
Trouble Shooting
Symptoms
1. With no flow through the
system (downstream valves
closed and cylinder valve
open) working pressure
increasing steadily above set
pressure (use test gauge if
necessary).
2. Gas leakage from spring case
Gauge:
3. Gas leakage from gauge
4. Gauge does not return to zero
5. Gauge does not consistently
repeat reading
6. Gas leakage from any joint
7. Excessive drop in working
pressure
8. Gas leakage from relief valve
9. Inadequate heat
10. No heat
Probable Cause
1. Leak across the seat
2. Loose case or damaged
diaphragm
3. Damaged gauge
4. Damaged gauge
5. Damaged gauge
6. Damaged or loose connection
(fittings, gauges, or spring case)
7. Worn or sticking internal parts;
Internal flow obstruction;
Dirty inlet gland filter; Cylinder
or upstream valve not fully
opened.
8. Faulty valve; Seat leak
9. One or two heaters burned out*
10. Lack of power; Faulty
thermostat(s)
*Check resistance across power leads (Figure1). With all heaters
functioning, resistance should be 88 ohms. With two heaters functioning,
resistance should be 132 ohms. And with only one heater functioning,
resistance should be 256 ohms.
