If water yield is small, check the nozzle for debris or scale. Use a small wire or needle to clear the tip.
If you purchased through a distributor, provide them the serial number (located near the terminal block). They can email you the latest revision of the (Rev 4.2 or higher). by02-vbp-s manual
If your BY02-VBP-S is from a known brand (e.g., B&Y Automation, SEW Eurodrive variant, or a Chinese OEM like Inovance), visit their official support page. Use the exact string by02-vbp-s manual in their search bar. If water yield is small, check the nozzle
: Most spray guns in this series feature a trigger safety lock; ensure it is engaged when not actively spraying. Nozzle Adjustment If water yield is small
The dedicates an entire page to "Motor Parameter Identification."