Sterling 882.00379.00 ユーザーズマニュアル

Conveying System Mechanical Components    Chapter 6: Troubleshooting 

96 of 138 

Material or vacuum line 
plugged.  

Find and remove the 
obstruction, such as a 
coupling gasket and gaylord 
bags. 

Filter chamber filter dirty.  

Clean filter.  

Vacuum hopper filter dirty.  

Clean filter. 

Bad atmospheric/sequence-T 
valve.  

Check for signal, sufficient 
compressed air, proper 
wiring and operation. 

Vent valve on pump package 
not operating correctly.  

Check for signal, sufficient 
compressed air, proper 
wiring and operation. 

Improper piping. 

Locate and correct. 

Convey time set too long. 

Reduce convey time. 

Collapsing hoses. 

Inspect hoses. 

Faulty vacuum switch. 

Test – ON – replace switch. 

High-Vacuum alarm. 

Take off compartment 
closed. 

Adjust take-off box. 

Conveying times are too 
long (Time Fill only). 

Special convey enabled. 

Observe and time the 
hopper(s) when loading. 
Note the time needed to fill a 
hopper. Set the conveying 
time to a few seconds less. 

Vacuum receivers are being 
overfilled. 
 

(Refer to enclosed Control 
Panel Manual)

 

Maximum conveying times 
are too long (Volume Fill 
only) and the Receiver Full 
proximity switch(es) are not 
being recognized by the 
PLC. 

Check proximity sensors for 
proper operation and proper 
wiring to PLC. Repair. Re-
set the conveying times to 
reasonable times. Re-adjust 
if needed; see Page 76

.

 

Poor take-off adjustment. 

Conveying times are too 
short (Time Fill only).  (See 
control panel’s O & I.) 

Observe and time the 
hopper(s) when loading. 
Note the time needed to fill a 
hopper. Set the conveying 
time to a few seconds more. 

Vacuum line leak.  

Find and repair leak. 

No material to convey. 

Make sure pickup probe is 
buried in material source. 

Vacuum receivers are being 
under-filled. 

Vacuum filter is plugged. 

Clean and/or replace filter.