Condux Gulfstream 35, Product Manual

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08785150

Troubleshooting

Improper Discharge Pressure

If discharge pressure is too low, check the following:

I.  Too  much  air  demand.    (Air  tools  required 

more air than the compressor can produce, air 
tools are free wheeling without resistance.)

II.  Service valve is wide open to atmosphere.

III.  Leaks in service line.

IV.  Restricted compressor inlet air filter.

V.  Faulty control system operation (i.e. regulator 

is sending a signal to close the inlet valve at 
all times).

VI.  Low engine speed

VII.  Worn,  damaged,  or  improperly  tensioned 

belts. 

If discharge pressure is too high or the safety valve 
blows, check the following:

I.  Oil separator plugged or blocked.

II.  Faulty safety valve.

III.  Faulty regulator or set too high

IV.  Inlet valve leaking or partially open. Loss of 

pressure signal to inlet valve from regulator 
causing inlet valve to stay open.

Coalescer Plugging

If the coalescer element has to be replaced frequently 
because it is plugging, it is an indication that foreign 
material may be entering the compressor inlet or the 
compressor oil is breaking down.

Compressor  oil  can  break  down  prematurely  for  a 
number of reasons:

I.  Extreme operating temperature.

II.  Negligence  in  draining  condensate  from  oil 

sump.

III.  Using the improper type of oil or dirty oil.

Oil Consumption

Abnormal oil consumption or oil in service line can 
be caused by the following:

I.  Overfilling of oil sump.

II.  Leaking oil lines or oil cooler.

III.  Plugged return line

IV.  Defective separator element

V.  Compressor shaft seal leakage.

VI.  Discharge pressure below 55 PSI

Relieving  pressure  too  quickly  after  shutdown  will 
cause the oil to foam and spill out of the blow down 
valve.

High  Compressor  Discharge 
Temperature

If the compressor shuts down on high temperature, 
check the following:

I.  Check  compressor  oil  level.    Add  oil  if 

required.

II.  Check electric fan and switch.

III.  Clean outside of oil cooler.

IV.  Clean oil system (cooler) internally.

V.  Plugged compressor oil filter.

VI.  Plugged return line.