Error in the upper pump of the PHA blowing system
Last updated: February 22, 2026
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HP DesignJet 500 repair. Guidance on the 21:10 (21.10) error code. For Service, Repairs, Support, DesignJet Plotter Sales ...
Error in the upper pump of the PHA blowing system
- 1
Turn Off/on. Check Pump cable is undamaged and connected to PCA, replace the upper pump
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A numeric or alphanumeric code displayed on the printer's front panel or in diagnostic logs that identifies a specific hardware or software malfunction.
The complete system that stores, transports, and delivers ink from the cartridges to the printheads, including tubes, valves, and pressure regulators.
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