Installer Manual Magnum 742-762 - Troubleshooting
88 / 106 Ref. MKT-IM-012 / C - 25.10.2019
10.3. Magnum valve cartridge
The following procedure provides sequential troubleshooting steps to isolate a suspect cartridge.
Note
The dynamic pressure applied to the valve must be greater than 172.4 kPa at all times when
performing the following tests. If a cartridge needs to be removed, follow the removal
procedure in section 9.6.12. Cartridge replacement, page 83.
Loss of water
pressure.
Fouled resin bed due to iron
accumulation.
• Clean Magnum control valve and
mineral bed with cleaner.
Slots in riser pipe or laterals are filled
with resin fines.
• Inspect and clean distributor pipe
slots as needed.
Salt in water to
service after
regeneration.
The injector is too small for the system
size.
• Install the correct injector.
Brine draw time excessively long due
to low water pressure.
• Increase water pressure above
172 kPa minimum.
Restricted drain line.
• Remove drain line restriction.
Insufficient rinse volume.
• Increase slow rinse time, fast rinse
time or both.
Plugged injector and/or injector
screen.
• Inspect and clean the injector and/
or injector screen assembly.
Issue Cause Reset and recovery
#4 Inlet cartridge
#3 Outlet cartridge
#1 Drain cartridge
#2 Rinse cartridge
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