Altec AIR CO2-PG80 Purge Gas Generator Operations and Maintenance Manual
SECTION 7 TROUBLESHOOTING GUIDE
A PROBLEM: UNIT DELIVERS WET AIR OR HIGH CO
2
LEVELS
POSSIBLE CAUSE
CHECK
CORRECTIVE ACTION
A1 High inlet air temperature.
For standard units, inlet air
temperature should be 70-80°F.
Reduce inlet air temperature to proper
level. An aftercooler may need to be
installed after compressor.
A2
Air flow through dryer in
excess of rated capacity.
Make sure outlet flow does not exceed
rated flow. See capacity chart in
Reduce air usage downstream.
SPECIFICATIONS.
A3 Low inlet pressure.
See capacity chart in SPECIFICATIONS.
Increase inlet pressure.
A4 Dirty or obstructed inlet air
filter.
Check inlet airline filter elements.
Replace elements.
A5 Purge orifice plugged.
Check purge air flow with flowmeter.
Clean or replace purge orifices.
A6 Solenoid coil burned out.
Check coil leads with ohmmeter. Open
Replace valves.
(burned out) coil will have no reading.
A7 Oil contamination of
Verify particle/coalescing inlet filtration is
Towers must be replaced if contamination
desiccant beds.
adequate and functioning properly.
is suspected.
A8 Timing cycle improper.
Verify correct timing cycle by listening
to purge or by using voltmeter across
coil connections on timer.
Replace timer if defective.
A9 Purge flow restricted.
Check mufflers for excessive back-
pressure.
Replace mufflers.
B
PROBLEM: RESTRICTED FLOW THROUGH UNIT
POSSIBLE CAUSE
CHECK
CORRECTIVE ACTION
B1
No power to unit.
On-Off switch and power supply.
Correct power problem.
B2
Improper operating
See A2, A3 above.
conditions.
B3
Dirty or obstructed inlet air
See A4 above.
filter.
B4
Plugged air passages.
Check inlet and outlet air passages and
Clear
restrictions.
piping for blockages.
B5
Inlet and outlet ports
Check inlet and outlet ports for proper
Reconnect properly.
reversed.
connections.
C
PROBLEM: EXCESSIVE PURGE
POSSIBLE CAUSE
CHECK
CORRECTIVE ACTION
C1
Check valve not closing.
Check for damage or contamination of
Clean or replace as
necessary.
check valves.
C2
Purge orifice(s) incorrect.
Measure purge flow with flow meter.
Install correct purge orifice(s).
Page 7
P/N P013253 REV B
