There are four symptoms that may require a cartridge to be removed and inspected or replaced.
1. A constant leak from the pilot drain in any cycle position.
A small discharge of water from the pilot drain while transitioning from one cycle to the next is
normal. A leak from the pilot drain could be caused by the following:
- Diaphragm failure in one of the valve cartridges. See table below for faulty cartridges.
- Debris may prevent the flappers from closing.
Inspect discs and seats. Quick cycle the logix Magnum to each cycle indicated below. If the leak
stops in a particular cycle, remove the cartridge listed in the right column. Inspect for wear or
damage.
No leak during
Service cycle (C0)
Backwash (C1)
Brine (C2)/Slow rinse (C3)
Fast rinse (C5)
2. A leak to the main 1.5" drain valve port.
- If the system is newly installed, ensure that the start-up procedure has been properly followed.
Refer to chapter 7. Commissioning, page 62.
- If the system has been operating correctly for a period of time and is now leaking, regenerate
the unit if the media bed is exhausted. Then proceed as follow.
Test the water leaking from the 1.5" drain port of the Magnum valve:
- If it is treated, remove and inspect the #2 Rinse cartridge.
- If it is untreated, remove and inspect the #1 Drain cartridge.
3. Leakage of untreated water to service.
- Leak at riser pipe seal or any other cause mentioned in this troubleshooting chapter.
- Bypassing of untreated water by #4 Inlet cartridge. Remove and inspect it.
4. Leak between the main valve body and the cartridge assembly.
- Remove and replace the two small O-rings at 5:30 and 6:30 positions of the cartridge (part
number for the O-ring set : P/N 1010116. See chapter 11.7. Magnum cartridges, page 98).
Note
Replacement cartridges are only available as complete assemblies.
Cartridge #1
Cartridge #2
Cartridge #3
Cartridge #4
Ref. MKT-IM-012 / C - 25.10.2019
Installer Manual Magnum 742-762 - Troubleshooting
#3 Outlet
#1 Drain
#2 Rinse
#2 Rinse or #4 Inlet
Drain
Fast rinse
Service
Inlet
Cartridge
P/N 1000366
P/N 1000365
P/N 1000366 (No bypass)
P/N 1000336 (Cap only for
bypass)
P/N 1000317
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