I've lost my coolant thru spindel on my cincinnati arrow2 750.
When I turn on thru spindel coolant M28, the pump starts and I don't get any error codes, but there is no coolant flood coming out of spindel.
There is no voltage on SOL5 (the coolant valve), but there is no break in wiring to the PCB.
As a test i changed the SOL4 (external coolant) and SOL5 (internal coolant) plugs and preformed a M8 test. The result is that the valv for internal coolant opened and pump started, and I got a flood thru spindel. So there is no plugging of the coolant pipeline.
Anyone out there who has had the same problem ?
I don't know what to look for anymore. Is there a fuse or something on a PCB that is blown ?