Troubleshooting Chart 
 
 
PROBLEM CAUSE SOLUTION
To high of an initial pressure 
drop
Air flow excessive for housing size or 
filter media grade too fine.
Install larger filter or coarser element
Premature Clogging 1.  Lubricant improperly selected for 
compressor.
Change oil, consult with lubricant supplier
2.  Excessive inlet particulate 
contamination.
Add particulate pre-filter
3.  Excessive lubricants present on 
element caused by either high lubricant 
viscosity or very high inlet aerosol.
Add particulate  pre-filter and oversize 
coalescer to compensate for overload.
4.  Oil/water emulsion forming an 
element.
Remove water by drip leg or aftercooler
Oil Present Downstream of 
Filter
Improper draining. Increase drain time on auto drain, clean "V" 
strainer, add auto drain, filter not seated in 
housing.  Check bypass valves to ensure it is 
closed.  Check condition of element.  Check 
flow direction.
Filter Ruptured Pressurizing the filter too fast. Keep air/out valve closed and open inlet 
slowly when pressurizing the filter.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
JL & JT SERIES SEVERE DUTY FILTER Recommended Drainage System: JT type filters have one 
drainpoint, JL type filters have two drain points! Alters, coalescers and adsorbers should be fitted with an 
automatic drain for removal of collected water and condensate. 
 
Section 18 Warranty 
 
The Airtek Warranty Philosophy... 
 
Warranty can be defined as a protection of investment. Warranty policies can come in all different shapes 
and sizes; however, the most important attribute to a successful policy is its fairness to all parties involved. 
This brings us to the explanation of components that make up Airtek Warranty Philosophy. 
 
Warranty Procedure... 
 
Airtek believes in giving the most expedient service possible to our customers. In order to accomplish this 
the most important step for our customer is to call us (1-800-451-6023) immediately in the event of a 
potential warranty situation. The phone call serves several purposes; 
 
•  It puts the customer in direct communication with the factory and assures them of factory support. 
 
•  It helps us to diagnose the problem and perhaps remedy it over the phone. This saves everyone time. 
In most cases we can determine the root cause of the failure through a simple phone call. 
 
•  It helps us to assess any parts that may be needed for repair. This eliminates time and travel by a 
service company making one trip with parts in hand. 
 
•  It helps us to determine situations non related to the dryer. After the phone call has been placed, and 
if service is necessary, we will authorize a service house in close proximity to the customer.