MARLO MR-210-2 - Page 49

MXIII SINGLE PROGRAMMING GUIDE
MAINTENANCE
46
PROBLEM/SYMPTOM PROCEDURE POSSIBLE CAUSE
1. Slight leak to drain. A. Disconnect tubing at backwash
control
A. Flow indicates leaky seal in stager
valve.
B. If stager is not leaking, use soap test
kit and check hardness of water at
drain.
B. If water tests soft, Valve #6 is
leaking: If water tests hard, Valve #3.
See Problem 5
2. High ow to drain
during service.
A. Check position dial. A. If not in position #4, rotate stager
clockwise to this position.
B. If position dial is in #4, check for
water leakage from Valve #3 or Valve
#6 vent holes.
B. Leakage indicates:
1. Ruptured diaphragm
2. Loose diaphragm nut
C. If vent hole is not leaking, use soap
test kit and check hardness of water
at drain.
C. If water tests soft, Valve #6 is open:
If water tests hard, Valve #3.
See Problem 5
3. Failure to draw brine. A. Check that manual brine valve is
open wide.
A. Valve must be open at all times, except
when servicing.
B. Check water pressure. B. Water pressure must be a least 30 psi
during regeneration.
C. Turn position dial clockwise to
position #2. Break union in suction
line to injector and feel for suction.
C. If there is suction, automatic brine
valve may be clogged.
No suction indicates:
1. Drain pipe to small or discharging at
level too high above oor.
2. Plugged pilot strainer.
3. Plugged injection nozzle.
4. Valves #1, #4, or #2 not closing fully.
See Problem #5
5. Plugged backwash controller.
6. Dirty mineral bed.
4. Slight leak from vent
hole.
A. Turn position dial clockwise to a
position, which relieves pressure on
valve.
A. If leaking stops, there is possibly a
loose diaphragm nut, a small Tear
in diaphragm, or the washer under
diaphragm is missing. If leaking
does not stop, shaft guide O-ring is
damaged, shaft guide is not seated
against gasket, or shaft is damaged.
5. Diaphragm valve
does not close or
seat completly.
A. Check that vent hole is not plugged. A. If vent hole is plugged, air in space
between diaphragm and shaft guide
will compress and prevent valve from
closing.
B. Check for water leak at vent hole. B. See Problem #4
C. Loosen tubing nut at diaphragm cap. C. If there is no ow, pilot strainer may be
plugged.
D. Turn o󰀨 water pressure and
disassemble diaphragm valve.
D. Seat washer may be dirty, worn or
loose. Seat may be eroded.
6. Diaphragm valve
does not open.
A. Check that vent hole is not plugged. A. If vent hole is plugged, a partial
vacuum will be created in the space
between the diaphragm and shaft
guide, preventing valve from opening.
B. Loosen tubing nut at diaphragm cap. B. Check for ow
1. If there is ow, stager valve is
leaking.
2. If there is no ow, tubing tting may
be plugged.
TROUBLESHOOTING SOFTENER