Section 5
ShopTek™ ST4, ST5, ST7, ST11, ST15 Three-phase 60 Hz User Manual 5: Operation
88292018-236 R00
Subject to EAR, ECCN EAR99 and related export control restrictions. 39
Operation
5.1 Routine operation
Before starting the compressor, check the fluid level in 
the separator tube. If sight glass is not completely full, 
add the required amount of fluid to bring it to its proper 
level. Frequent addition of fluid indicates the presence of 
a leak or a condition causing excessive fluid consump-
tion. See the Section 6.12: Troubleshooting on
 page 51 
under “Excessive compressor fluid consumption” for a 
p
robable cause and corrective action.
After a routine start, observe the controller display for the 
pr
oper indications for this phase of operation. After the 
compressor has warmed up, check all compressor oper-
ation indications to ensure that it is running properly.
 WARNING
High pressure hazard
Removing caps, plugs, and/or other components 
wh
en compressor is running or pressurized 
could result in death or serious injury.
Do not 
remove caps, plugs, and/or other com-
ponents when compressor is running or pressur-
ized. Stop compressor and reliev
e all internal 
pressure before removing caps, plugs, and/or 
other components.