MRO 3 & 4 MANUAL
42
98-0140
Rev. F
PROBLEM
POSSIBLE CAUSE
CORRECTIVE ACTION
Disinfect cycle will not
operate when holding the
ENTER key (cont’d)
Disinfect Solenoid Valve not
operating
Test solenoid valve (Section
9.5). Replace the valve if it
fails (Section 9.6).
Pump making excessive
noise
Low pressure or flow rate
feeding the MRO
Feed solenoid is not
operating
Pump motor or impeller
failing
Check the inlet gauge PSI
(must be > 20 PSI), and
verify that the product flow
(flowmeter) > 1 GPM.
Test the solenoid (Section
9.5). Replace the valve if it
is defective (see Section
9.6).
Check PUMP PSI GAUGE to
verify that it is within
operating parameters.
Replace the pump assembly
if necessary (see Sections
9.3 and 9.4).
Poor quality product water
High Chlorine levels
MRO not rinsed thoroughly
Reject Flow Meter not
properly adjusted.
Fouled membrane
Backwash the carbon filter or
rebed.
Rinse membrane (see
Section 8.5, Rinse Out
Cycle).
Turn the Reject Flow Meter
knob so that the Reject
Water flow is equal or slightly
greater than the Product
Water flow.
Exchange all water
treatment components (see
Section 8).
Verify that the conductivity
cell accuracy with a known
good meter. Follow the
calibration procedures in
Section 6.5 or replace cell if
necessary.
Summary of Contents for MRO3
Page 8: ...MRO 3 4 MANUAL 5 98 0140 Rev F SECTION 3 COMPONENTS AND SCHEMATICS 3 1 EXTERNAL FRONT VIEW...
Page 10: ...MRO 3 4 MANUAL 7 98 0140 Rev F 3 2 INTERNAL REAR VIEW...
Page 12: ...MRO 3 4 MANUAL 9 98 0140 Rev F 3 3 ELECTRICAL DIAGRAM MRO3 MRO4...
Page 13: ...MRO 3 4 MANUAL 10 98 0140 Rev F 3 4 FLUID DIAGRAM MRO3 MRO4...
Page 34: ...MRO 3 4 MANUAL 31 98 0140 Rev F FIGURE 6 2...
Page 35: ...MRO 3 4 MANUAL 32 98 0140 Rev F FIGURE 6 3...
Page 52: ...MRO 3 4 MANUAL 49 98 0140 Rev F SECTION 11 MRO3 4 SPARE PARTS LISTING...
