
CENTAC TROUBLESHOOTING GUIDE
5
CST-TP0007
1994 Ingersoll-Rand Company
Date of issue: January, 1999 Supersedes: 16-dec-94
Low Control Air Pressure
Cause
Solution
1. Too small control air line.
Replace with larger diameter pipe.
2. Moisture in control air line.
Remove moisture.
Provide permanent method for moisture
removal.
3. Sensing control air pressure from
wrong location.
Change location of sensing pressure.
4. Leaking fittings or damaged pipe.
Repair or replace.
5. Closed C.A. valve.
Open valve.
Low Instrument Air Pressure
Cause
Solution
1. Instrument air line too small.
Replace with a larger pipe.
2. Instrument air dryer malfunctioning.
Repair or replace.
3. Instrument air valve closed.
Open valve.
4. Instrument air supply pressure below
recommended pressure.
Increase supply pressure. Obtain a
different air source of adequate pressure.
5. Dirty I.A. filter.
Clean or replace.
6. I.A. filter wrong size.
Replace.
7. Leaking fittings or damaged pipe.
Repair or replace.