MARLO MR-210-2 - Page 50

MXIII SINGLE PROGRAMMING GUIDE
MAINTENANCE
47
PROBLEM/SYMPTOM PROCEDURE POSSIBLE CAUSE
7. Hard water leakage into
service lines.
A. Close inlet and outlet valves and
inspect by-pass valve.
A. Examine valve
1. Seat washer may be loose or
worn.
2. Seat may be rough.
3. Shaft orice plugged.
4. Diaphragm ruptured.
B. Check that Valve #4 is seating. B. See Problem 5.
8. Restricted or no drain ow
during backwash.
A. Either Valve#1 or Valve#2 is
not opening fully. To determine
which one: Turn position dial to
position #1 and then to position
#3. Compare ow at drain.
A. Flow should be the same for both
positions.
1. If no di󰀨erence is noted, valve
#4 is not opening properly.
2. If backwash ow is higher,
valve #1 is not opening
properly.
See problem #7.
B. Turn position dial to position #1
and then position #3. Compare
ow at drain.
B. Flow should be the same. If ow
for position also is low.
1. Inlet water pressure may be
low.
2. Backwash ow control may be
plugged.
3. If position #3 ow rate is
higher, either valve #4 or valve
#3 is not opening.
See problem #7.
9. Loss of softening resin
(evidence of resin in drain
lines).
A. Open vent in top of softener tank
and check for air in tank.
A. If air is present
1. Vent completely and recheck
prior to next regeneration.
2. If recheck discloses a
recurring build-up of air, check
brine system(s) for possible
leaks in suction line or brine
valve not seating properly.
3. If brine system is functioning
properly source of air may
be in the water supply to
unit. Use of an automatic air
relief valve is indicated in this
situation (consult factory for
recommendation).
B. Check automatic backwash
control valve for rate of ow in
excess of listed ow (gpm)
B. Check for excessive inlet water
supply pressures– reduce to
rated pressure.
10. Loss of softening resin
(evidence of resin and/or
gravel in service lines.
A. Check for damage to softener
under-drain system.
A. Investigation of damage to
under-drain generally requires
unloading of softener tank.
Consult factory for recommended
procedures before proceeding.
TROUBLESHOOTING SOFTENER