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VIII. TROUBLESHOOTING GUIDE
Symptom
Possible Cause
Corrective Action
Drain stuck open - Air continuously
being discharged.
1. Bleed hole on bottom of piston cylinder
obstructed.
2. Worn seals .
1. Use pin to open hole.
2. Rebuild drain. See Section VI-B.
Drain won’t discharge - condensate
can be drained through manual drain.
1. Drain being operated below minimum
pressure.
2. Air supply through inlet or vent line
obstructed.
3. Drain line obstructed
4. Valve body has been turned causing
impairment of float movement.
5. Worn seals
1. Increase line pressure above 10 psig
(.69 bar)
2. Top connection drains: Slope inlet line downward
to avoid water trap or install vent line.
Bottom connection drains: Make sure vent line is
open.
Make sure isolation valves are open.
3. Make sure there are no valves, severe bends, or
other obstructions in drain line.
4. Disassemble and check that float is free to move.
5. Rebuild drain. See Section VI-B.
