3785

Common Causes

• Spindle lubrication filter element clogged with sludge or debris
• Contaminated or degraded spindle lubrication oil blocking the filter
• Clogged-filter detection switch/signal wiring fault causing a false OFF signal

Troubleshooting Steps

1. 1Read the code number shown with the alarm: code 1 = Spindle lubrication filter is clogged; the clogged-filter signal remained OFF for 2 seconds or longer (signal not checked for 8 seconds after control reset)
2. 2Read the code on the alarm screen; Code 1 means the clogged spindle lubrication filter signal stayed OFF for 2 seconds or more.
3. 3Locate the spindle lubrication unit filter and remove the element; inspect it for sludge, metal particles, or varnish buildup.
4. 4Clean the spindle lubrication filter element as the manual directs, or replace it if cleaning does not restore it; check the oil in the lubrication tank for contamination and change it if dirty.
5. 5If the alarm returns with a clean filter, check the clogged-filter detection switch and its wiring/connector at the lubrication unit for a stuck switch or broken signal line.
6. 6If the alarm persists after these checks, record the alarm number, code, and object and contact Okuma service.