Sullivan-Palatek D210PHKR - Discharge Pressure Is too High or Relief Valve Blows; Relief Valve Blows with Throttle Lever in Idle Position; Pressure Does Not Blow down after Shutdown; Compressor Oil Level Is Decreasing Excessively

37TROUBLESHOOTING
6.4 DISCHARGE PRESSURE IS TOO HIGH OR RELIEF VALVE BLOWS
POSSIBLE CAUSE ACTION
Regulator valve faulty or mis-adjusted Properly adjust the regulator.
Rebuild/replace the regulator if necessary.
Inlet valve not closing properly Check the white sealing ring for the poppet valve, to
ensure it is intact and not damaged.
Ice or debris in control lines Clean debris from the control lines.
Thaw out the control lines to remove the ice buildup.
Optional Heater Kit availableconsult Factory for
information. Direct the lines so there is a low point to
drain any condensate.
Pressure relief valve faulty Replace the faulty relief valve.
Oil separator plugged Replace the oil separator.
Inlet valve leaks at base Replace O-ring.
 
6.5 RELIEF VALVE BLOWS WITH THROTTLE LEVER IN IDLE POSITION
POSSIBLE CAUSE ACTION
Inlet valve not closing properly Check the white sealing ring for the poppet valve, to
ensure it is intact and not damaged. (185–375 CFM
compressors)
Rebuild/replace valve.
6.6 PRESSURE DOES NOT BLOW DOWN AFTER SHUTDOWN
POSSIBLE CAUSE ACTION
Automatic blowdown valve may be faulty Check operation of the automatic blowdown valve.
Replace if necessary.
Air line from inlet valve or sump to blowdown valve may
be restricted
Verify the pilot signal is reaching the automatic
blowdown valve.
Verify the blowdown valve is plumbed correctly.
6.7 COMPRESSOR OIL LEVEL IS DECREASING EXCESSIVELY
POSSIBLE CAUSE ACTION
Oil line leaking Repair or replace any leaking lines and retest.
Oil cooler leaking Repair or replace the leaking oil cooler and retest.
 
Oil in service line See 6.8 Oil in Service Line section.
6.8 OIL IN SERVICE LINE
POSSIBLE CAUSE ACTION
Oil return line plugged or restricted Remove the oil return line and clean.
Separator element plugged or damaged Replace the separator element and change compressor
oil.
Discharge pressure below 90 psi The air demand may be too much. Add compressors or
decrease the demand.
Adjust the discharge pressure above 90 psi.
Check MPV operation; rebuild/replace as needed.
Condensation in sump tank Drain condensation from sump tank.