What causes Okuma OSP alarm 2789?

Filter actually clogged with chips and swarf. Malfunction of the pressure switch for detecting clogged filter. Coolant contamination beyond normal filter capacity.

How do I fix Okuma OSP alarm 2789?

1. Read the code number shown with the alarm: code 1 = Filter clog signal ON more than 1 s while oil hole (through spindle coolant) motor ON; code 2 = Filter clog signal ON more than 1 s while shower coolant motor ON; code 3 = Filter clog signal ON more than 1 s while washing gun motor ON 2. Read the code: 1 means the hi-pressure oil hole tank filter clog signal was ON more than 1 second while the oil hole (through spindle coolant) motor was ON, 2 means it was ON while the shower coolant motor was ON, 3 means it was ON while the washing gun motor was ON. 3. Clean the filter as the manual directs: remove the filter element from the through-the-tool coolant tank and flush or replace it. 4. Check the coolant tank for excessive chips and clean it so the filter does not clog again immediately. 5. If a clean filter still shows the clog signal, test the pressure switch for detecting clogged filter and its wiring; replace the switch if it reads clogged with good flow. 6. Restart the coolant motor that was named by the code and confirm the clog signal stays OFF.

Okuma OSP codes

axismd.ai

Okuma OSP Controller

Coolant · Intermediate

Alarm 2789

Okuma OSP Alarm B 2789 - Coolant tank filter clogged

The filter in the through-the-tool coolant tank is clogged. The clog detection signal stayed ON for more than 1 second while one of the coolant motors was running, meaning flow through the high-pressure oil hole circuit is restricted.

Okuma OSPCoolantIntermediate

2789

Okuma OSP Alarm B 2789 - Coolant tank filter clogged

Coolant tank filter clogged

Common Causes

Filter actually clogged with chips and swarf
Malfunction of the pressure switch for detecting clogged filter
Coolant contamination beyond normal filter capacity

Troubleshooting Steps

1Read the code number shown with the alarm: code 1 = Filter clog signal ON more than 1 s while oil hole (through spindle coolant) motor ON; code 2 = Filter clog signal ON more than 1 s while shower coolant motor ON; code 3 = Filter clog signal ON more than 1 s while washing gun motor ON
2Read the code: 1 means the hi-pressure oil hole tank filter clog signal was ON more than 1 second while the oil hole (through spindle coolant) motor was ON, 2 means it was ON while the shower coolant motor was ON, 3 means it was ON while the washing gun motor was ON.
3Clean the filter as the manual directs: remove the filter element from the through-the-tool coolant tank and flush or replace it.
4Check the coolant tank for excessive chips and clean it so the filter does not clog again immediately.
5If a clean filter still shows the clog signal, test the pressure switch for detecting clogged filter and its wiring; replace the switch if it reads clogged with good flow.
6Restart the coolant motor that was named by the code and confirm the clog signal stays OFF.

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