When the CM750 fails to start up or initiate ink flow, check these common faults before logging a service call.
Symptoms of a no-flow startup
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Printer powers on but won't print
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Ink pump doesn’t activate
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Message: No Ink Flow / System Not Primed
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No visible stream from nozzle
Top causes of no ink flow
| Cause | Fix |
|---|---|
| Dry or air-locked ink system | Run Fill Mixer routine |
| Empty or blocked ink tank | Refill with compatible fluid, check pickup filters |
| Failed ink pump | Test voltage and pump pressure |
| Faulty or blocked valves | Run Clean Ink System or inspect valve solenoids |
| Incorrect ink setup | Confirm ink type, solvent, and mix ratio |
Quick fix checklist
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Check fluid levels
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Run Fill Mixer from System menu
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Listen for pump operation—if silent, inspect power supply
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Use diagnostics to test valves 4, 5, and 6
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If startup fails after 2 attempts, run Umbilical Purge or Clean Ink System
Pro tip:
Always prime the system fully before your first print after ink changes or shutdowns.