MARLO NXT2 Series Installation, Operation And Maintenance Manual page 38

MGT 30M–300M NXT2 1" SINGLE
MAINTENANCE
TROUBLESHOOTING 2900 VALVE (CONTINUED)
PROBLEM
7. Excessive Water In Brine Tank.
8. Softener Fails To Draw Brine.
9. Control Cycles Continuously.
10. Drain Flows Continuously.
Problem: Softener Delivers Hard Water.
Cause could be that . . . Reserve Capacity Has Been Exceeded.
Correction: Check salt dosage requirements and reset program to provide additional reserve.
Cause could be that . . . Meter Is Not Measuring Flow.
Correction: Check meter with meter checker.
CAUSE
A. Plugged Drain Line Flow Control.
B. Plugged Injector System.
C. Timer Not Cycling.
D. Foreign Material In Brine Valve.
E. Foreign Material In Brine Line Flow
Control.
A. Drain Line Flow Control Is
Plugged.
B. Injector Is Plugged.
C. Injector Screen Plugged.
D. Line Pressure Is Too Low.
E. Internal Control Leak
F. Service Adapter Did Not Cycle.
A. Misadjusted, Broken or Shorted
Switch.
A. Valve Is Not Programming Cor-
rectly.
B. Foreign Material In Control.
C. Internal Control Leak
General Service Hints For Meter Control
35
CORRECTION
A. Clean Flow Control.
B. Clean Injector and Screen.
C. Replace Timer.
D. Replace Brine Valve Seat And
Clean Valve.
E. Clean Brine Line Flow Control.
A. Clean Drain Line Flow Control.
B. Clean Injector.
C. Clean Screen.
D. Increase Line Pressure To 20 P.S.I.
E. Change Seals, Spacers and Piston
Assembly.
F. Check Drive Motor And Switches.
A. Determine If Switch or Timer Is
Faulty and Replace It or Replace
Complete Power Head.
A. Check Timer Program and Posi-
tioning of Control. Replace Power
Head Assembly If Not Positioning
Properly.
B. Remove Power Head Assembly
And Inspect Bore. Remove Foreign
Material and Check Control In Var-
ious Regeneration Positions.
C. Replace Seals and Piston
Assembly.