USER MANUAL
Models SD-820 to SD-1710 with DDS
Rev 04 – October 2005
22
Inlet/exhaust valve failed to activate
Verify wiring to terminal strip
Verify wiring connector on the solenoid valve
assembly
Verify pilot air service valve is open
Verify pilot air filter element is not soiled
Outlet check valve failed to close
Verify bushings on check valve are worn
Verify spring on check valve
Verify check valve seat O-ring
6.3 BACK PRESSURE TOO HIGH DURING REGENERATION
POSSIBLE CAUSE
SOLUTION
Muffler is blocked
Clean or replace muffler
Outlet check valve failed
Verify springs and bushings on valves
Verify seat O-ring is not damaged
Exhaust valve not fully open
Verify operation of pneumatic actuator
Verify pilot air to actuator
Verify if valve is obstructed
Inlet valve leaks across ports
Remove valve and test for across port
leakage
Install new seals
Inlet valve not fully positioned
Verify
the
pneumatic
actuator
for
90°
operation
Verify for leaks across vane of actuator
Pilot air pressure failed due to plugged pilot
filter or damaged pilot line.
Attention!
If you are not able to repair a fault, call your local Sullair distributor
or the Sullair Service Department to arrange for service. A service
technician will help you with the problem or, if necessary, will be sent
to your site.
Summary of Contents for SD-1050 Series
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