Sterling 238 User Manual

No power to control box. 

Plug in power cord. Check 
main disconnect. 

Power switch is off. 

Turn ON control box. 

Fuse is blown. 

Replace the MDL 10 fuse. 

The bin below the hopper 
loader is filled to capacity. 

Unit resumes operation when 
the material level drops; this is 
normal. 

Fouled flapper discharge 
valve. 

Remove obstruction; check for 
free movement of flapper 
assembly. 

Build-up on flapper. 

Clean and readjust for material 
flow characteristics. 

Loose control wiring. 

Secure all terminal 
connections. 

Blowback and motor 
connections are not secure. 

Reattach blowback and/or 
motor connections. 

Power switch has failed. 

Replace switch. 

Reed switch has failed. 

Replace reed switch, adjust 
magnet. 

Hopper loader does not 
work. 

Circuit board has failed. 

Replace circuit board. 

The bin below the hopper 
loader is filled to capacity. 

Unit resumes operation when 
the material level drops; this is 
normal. 

Motor assembly is not properly 
connected to the controller. 

Plug motor assembly into the 
controller enclosure. 

Fuse is blown. 

Replace fuse with an MDL 10 
fuse. 

Vacuum motor does not 
work. 

Motor requires servicing. 

Repair or replace motor as 
needed.