Oil flows back to suction filter at stop
Tanabe TASK, oil-injected rotary screw compressor, packaged
Possible cause
Unloader solenoid fault or stop delay relay wrong
What to do
Manufacturer's manual, p. 37Clean/replace valve, adjust off-delay timer
See the assembly on the 3D model
Other Tanabe TASK faults
Does not start or stops at onceControl panel fault, low voltage, thermal relay trippedAir receiver safety valve blowsUnloader pressure switch, unloader valve or solenoid faultSeparator safety valve blows (high oil pressure)Clogged separator cartridge, minimum pressure valve faultPressure does not rise (stays unloaded)Pressure switch, solenoid or unloader seal ring faultOverheat tripDirty cooler, low oil, fan stopped, blocked intake, thermo valve faultHigh oil content in airClogged separator cartridge, blocked return line, overfillingHigh vibration or noiseWorn mounting rubbers, loose bolts, bearing damage
From the manufacturer's manual “EM-20-3 INSTRUCTION MANUAL FOR AIR COMPRESSOR”. Check against the original on board before work.