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8.4 Advanced maintenance schedule (only certified service staff)
The position references in the table refer to the PID. See fig.: 6.
Warning
Danger of personal injury or damage to the
equipment!
The following tasks must only be performed by
certified service staff. This staff must have received
proper training from Grundfos before any work on the
system.
Interval
Component
Whole AQpure system
Feed pump (GP1) /
Backwash pump (GP2)
Pressure relief valve (4)
Motor valves (MK1 to
MK5)
Filters (11), (27)
UF membrane (13)
Every 6
Control cabinet
months
Internal CIP
Air scouring
GAC filter (39)
UV disinfection (45)
Chlorination
Prefilter (5)
Air scouring
GAC filter (39)
Every 12
months
UV disinfection (45)
Solar package
Whole AQpure system
Feed pump (GP1) /
Backwash pump (GP2)
Prefilter (5)
Every 24
Internal CIP
months
Air scouring
Chlorination
External CIP unit
UF membrane (13)
Internal CIP
Every 60
months
Air scouring
Solar power
34
Task
Inspection of general installation conditions. Log statistics, alarm history, check system for
functionality, leaks, abnormal conditions.
Inspect shaft seal, tighten pump connections, tighten electrical connections on terminal box.
Check that no leak is present.
Check functionality of valves.
Replace filter screens.
Perform integrity test.
Retighten electrical connections. Clean mat of cooling filter.
General check of circulation pump (GP3). Retighten mechanical and electrical connections.
General check of air compressor (GP4). Retighten mechanical and electrical connections.
Replace activated carbon (GAC) in filter vessel (39) and check filter cartridge in cartridge filter
(42). Inspect strainers and riser pipe for damages or clogging. Test functionality of multiport valve
(MK6).
Clean UV sleeve and sensor of UV system (45). Check intensity value. Check functionality of
solenoid valve (MB2).
Check level sensor (BL1) and suction line. Check that no sediments are in chemical tank (21).
Check that the sodium hypochlorite solution meets the specifications.
Calibrate dosing pump (GP5), and retighten dosing head screws.
Replace filter screen (5.13). See fig.: 20.
Replace intake filter of compressor (GP4).
Replace filter cartridge in cartridge filter (42).
Replace UV lamp of UV system (45). Perform sensor cleaning. Reset intensity value to 100 %.
Tighten electrical connections, measure voltage of batteries.
Perform External CIP to remove sediments and other particles.
Replace shaft seal, wear kit, gaskets and motor bearings.
Replace non-return valve (7).
Replace cylinder (5.1) and elbow fitting (5.2). See fig.: 19.
Replace non-return valve (10).
Replace non-return valves (16), (17).
Replace diaphragm and valves of dosing pump (GP5).
Replace non-return valve (52).
Replace membrane element.
Replace pump head of circulation pump (GP3).
Replace intake vanes of compressor (GP4).
Replace batteries.
After maintenance, the certified service staff is
responsible for setting the new scheduled
Note
maintenance date in the service menu at the HMI.
Details can be found in the separate HMI manual,
which is supplied to certified service staff only.
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