43
PROBABLE CAUSE
CORRECTIVE ACTION
Inlet Valve Not Opening Or Closing In Relation To System Demand
Improper setting of vacuum pressure
switch or faulty switch
Adjust vacuum pressure switch to proper setting or replace switch, if
faulty
Excessive moisture in control air line at
air cylinder
Service control air line filter daily
Improper functioning of inlet valve piston Check piston and cylinder bore. Repair or replace as needed
Jammed air inlet valve assembly Check air inlet valve bushing and shaft. Check piston and cylinder bore.
Repair or replace as needed
Faulty solenoid valve Repair or replace as necessary
Faulty shuttle valve Repair or replace as necessary
Loose wiring connections at solenoid
valve/pressure switch
Check and tighten wiring terminals
Vacuum pump
Does Not Unload When There Is No System Demand
Incorrect vacuum pressure switch setting Adjust to proper setting
Faulty vacuum pressure switch Replace switch
Faulty solenoid valve Repair or replace as necessary
Faulty differential pilot valve Repair or replace as necessary
Leaks in control lines Check all control line fittings and tubings
Vacuum pump Does Not
Revert To Load When Service Line Pressure Rises To Reset Pressure
Faulty vacuum pressure switch Repair or replace as necessary
Loose wiring connection Check and tighten wiring terminals
Jammed air inlet valve assembly
Check and repair air inlet valve
Faulty solenoid Repair or replace as necessary
Faulty timer Check and replace timer
Faulty differential pilot valve Orifice plugged. Clean or replace as necessary
Vacuum pump Will Not Time-out Or Shut Down When Unloaded (Optional Auto/Dual Units Only)
Faulty timer Check and replace as necessary
Leaks in control lines Check and repair any leaks
Leaks in service lines Check vacuum distribution system for leaks
Faulty air pressure switch Repair or replace as necessary
Faulty air pressure sensors Replace as necessary
To Next Page
Loading...
Need help?
General
