1831

Common Causes

• Faulty or stuck pressure relief valve in the oil-air lubrication unit
• Clogged filter or blocked lubrication piping
• Weak or failing lubrication pump
• Defective oil-air pressure monitor switch giving a false reading

Troubleshooting Steps

1. 1Read the code number shown with the alarm: code 1 = Lubricant pressure did not reach 1.2 MPa within 60 seconds after the oil-air lubrication output turned ON; code 2 = Lubricant pressure did not fall to 0.8 MPa before the lubrication output off-time elapsed
2. 2Read the code on screen. Code 1 means pressure never reached 1.2 MPa within 60 seconds of the lubrication output turning ON; Code 2 means pressure never dropped to 0.8 MPa within the output off-time.
3. 3For Code 1, check the oil-air unit tank level, then inspect the filter and piping for clogs or kinks that would prevent pressure buildup.
4. 4Watch the pump run during a lubrication cycle; weak or no pump operation points to the pump or relief valve inside the unit.
5. 5For Code 2, suspect a stuck relief valve or a pressure switch that is not releasing; verify the pressure actually falls with a gauge if fitted.
6. 6If the hardware builds and bleeds pressure correctly but the alarm persists, replace the oil-air pressure monitor switch.
7. 7If the unit itself is faulty, replace the oil-air lubrication unit as the manual directs; if the alarm returns after replacement, record the alarm number and code and contact Okuma service.