Watson-Marlow qdos H-FLO Reference Manual page 223

Pumphead of unknown type fitted
PUMPHEAD UNKNOWN screen displays warning to check settings.
Previous pump head settings (Speed limit, pressure limit, analog calibration) are retained.
1.
Press ACKNOWLEDGE to continue with current configuration.
2. Bring pump back into operation.
3. Re-calibrate the flow, by following flow calibration procedure in section 11.3.2
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