41
4. TROUBLESHOOTING [Troubleshooting of Oil Mist Remover]
4.3 Troubleshooting of Oil Mist Remover
①
The vacuum indicator shows a red mark
The pressure gauges reads zero (0) psi.
The control air is not supplied.
Pressure setting of the regulator is lower ?
Reset the regulator to a proper pressure.
Clean the filter.
Pressure of a control air is lower than the regulator
setting value?
Maintain the pressure of a control air at the regulator
setting value.
The gear case or gear case vent pipe has a leak
(for example, the oil filling port plug on the gear case is not tight).
- Tighten every screw and plug to remove all leaks.
- Make sure that the OMR relief valve is closed.
The solenoid valve may have problem or the remover
element may be dirty.
If the solenoid valve has no problem replace the element.
②
The OMR relief valve opens immediately when starting the air compressor (the control air pressure is still
low) or when the DSP has stopped. This is a normal occurrence.
YES
YES
YES
YES
NO
NO
NO
NO
The OMR relief valve is dirty or stuck open by a foreign object.
Disassemble and clean the OMR relief valve.
Replace if necessary.
Go to the procedure
①
. The vacuum indicator shows a
red mark. (Gear case has a positive internal pressure.)
YES
NO
Problems and actions to be taken are as follows.
③
Oil is vented through the ejector’s compressed air outlet (the separated oil is not being recovered).
④
Oil pressure is low (oil pump may be inhaling air).
Accumulated oil is visible in the tube between the
element housing and the float trap.
Clean the nozzle of the float trap.
Upper or lower packing is not seated properly on the
element ?
Reinstall the element, seating the packing properly for a
maximum sealing performance.
Control air contains oil ?
Check the control air for oil contents.
Element may be dirty.
Inspect the element and replace if necessary.
YES
YES
YES
NO
Problem of compressor (dirty oil filter, low oil pressure due
to oil leakage, failure of oil pump or OMR relief valve, etc.)
Perform necessary adjustment or replacement.
Foreign matter in float trap nozzle (Check for a large
amount of air sucked from the oil collecting pipe to oil
pump suction side.)
Disassemble and clean the float trap nozzle and the
float trap.
YES
YES
NO
NO
NO
NOTE:
The OMR relief valve opens immediately when starting the air compressor (the control air pressure is still low) or when the DSP
has stopped. This is a normal occurrence.
NOTE:
The oil mist remover makes the gear case internal pressure negative during operation, reducing the pressure by 0.7 to 1.5 psi
(0.005 to 0.01 MPa). This is not unusual; reset the oil pressure on the OMR relief valve.
