If the hole jammed, please use a thin iron wire to dredge it, then install it back
appropriately.
7.5 If there have pressure inside chemicals tank, please check following parts.
7.5.1 Disassemble the bolt at the bottom of chemical tank, check the filter is jammed?
If the filter is jammed, clean it, install it back appropriately.
7.5.2 Check whether the nozzle jammed?
Disassemble the nozzle,
If it is jammed, use a thin iron wire to dredge it, check photos below,