ABB IRBT 4003S Product Manual page 94

Maintenance instructions
Locating blockage in Series-Flo systems
Master divider valve without performance indicators:
1. With a manual pump connected to the master divider valve as outlined in step 1, raise
2. Remove one at a time each indicator port plug and attempt to operate the manual
3. If all indicator port plugs are removed and master will not cycle, the blockage is in this
If testing in step 2 indicates a blockage in the master divider valve, this divider valve
must be disassembled and cleaned. See step 5 for instructions on correct procedure.
3-12
Action
pressure to 2,000 PSI.
pump after each plug is removed.
Do not exceed 2,000 PSI.
If pressure drops and master cycles freely after an indicator port plug is removed then
the blockage is downstream in the area that is being served from that outlet.
See step 3.
divider valve.
When indicator port plug of a blocked area is removed a small shot of trapped lubricant
will usually surge out of this outlet as the inlet pressure on the divider valve drops.
3HEA 800 970-001 Rev. D, Mars 2006