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Okuma OSP Controller
Lubrication · Intermediate
Okuma OSP Alarm C 3771 - Lube tank motor run time over
The lubrication tank motor ran longer than the allowed ON-time limit, so the control shut it down and raised this alarm. It means the lube motor was commanded on continuously instead of being turned off as intended.
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Okuma OSP Alarm C 3771 - Lube tank motor run time over
Lube tank motor run time over
The lubrication tank motor ran longer than the allowed ON-time limit, so the control shut it down and raised this alarm. It means the lube motor was commanded on continuously instead of being turned off as intended.
Common Causes
- Program missing the lubrication output OFF command (M834)
- Lubrication motor ON button held down continuously
- Lubrication motor ON button stuck or malfunctioning
Troubleshooting Steps
- 1Read the code number shown with the alarm: code 1 = Lubrication motor ran past its permitted ON-time limit
- 2Check whether the lubrication motor ON button on the panel is stuck, held, or mechanically binding — free it and see if the alarm clears.
- 3If the alarm occurred during an automatic cycle, confirm the program issues the lubrication oil output OFF command (M834) after the lube ON command; add it if missing.
- 4Test the lube motor ON button electrically; if its contact stays made after release, replace the button/switch.
- 5After correcting the cause, run a manual lube cycle and confirm the motor stops within the normal ON-time limit.
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