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dispenseIT Manual – Troubleshooting

Pump will not run #

  • Problem
    • No 3 phase power to pump
  • Solution
    • Check pump has constant voltage, check any breakers, disconnect switches, and/ or fuses installed in electrical system

  • Problem
    • Incorrect 3 phase voltage supplied to pump
  • Solution
    • Check that the supplied 3 phase voltage matches the pump

  • Problem
    • Pump not in “run”
  • Solution
    • Press power button on screen (lower left button

  • Problem
    • Defective pump/motor
  • Solution
    • Replace pump/motor

  • Problem
    • Relay in dispenseIT control box not energized
  • Solution
    • Verify relay for function energized when function in tunnel controller is on. The LED on relay should be on. The voltage on A1 and A2 of relay should match system control voltage

Pump leaks water #

  • Problem
    • Not enough thread tape/ pipe sealant
  • Solution
    • Install new thread tape/ pipe sealant

  • Problem
    • Loose pipe thread fittings
  • Solution
    • Tighten the fittings

  • Problem
    • Loose flange bolts
  • Solution
    • Tighten the flange bolts

  • Problem
    • Bad flange gaskets
  • Solution
    • Replace the old gaskets with new gaskets

  • Problem
    • Failed pump seals
  • Solution
    • Replace/ repair pump seals

Low water pressure on system #

  • Problem
    • Pump not running
  • Solution
    • Check above items

  • Problem
    • Pump setpoint too low
  • Solution
    • Raise pump set point to desired pressure

  • Problem
    • Insufficient water supply to pump
  • Solution
    • Check water supply to pump

  • Problem
    • Pump not primed
  • Solution
    • Follow pump priming instructions

  • Problem
    • Motor rotation is incorrect
  • Solution
    • Verify the motor rotation

  • Problem
    • Defective Pump
  • Solution
    • Replace pump

  • Problem
    • Defective gauge on system
  • Solution
    • Compare gauge reading to pressure on pump screen, replace gauge. If needed replace the guage.

  • Problem
    • Defective transducer on pump
  • Solution
    • Consult Grundfos factory technical support

Injector not drawing chemical #

  • Problem
    • Clogged chemical feed line from chemical barrel
  • Solution
    • Check hose for clogs, foot valve, metering tips and injector barb

  • Problem
    • Too much back pressure on injector
  • Solution
    • Check for clogged lines or nozzles on applicator arch, install smaller injector

  • Problem
    • Clogged injector
  • Solution
    • Rinse the injector off with hot water with compressed air blow air through the following:
      • Injector chemical hose barb
      • Injector nozzle
    • Remove the injector nozzle; clean and reassemble  (allen key required to remove injector)

Injector draws chemical for a brief moment #

  • Problem
    • Injector is too large
  • Solution
    • Install a smaller injector
    • Install larger spray nozzles on the applicator
    • Install more spray nozzles on the applicator

  • Problem
    • Too much back pressure on injector
  • Solution
    • Check for clogged lines or nozzles on applicator arch, install smaller injector

Injector has a low but consistent vacuum chemical draw #

  • Problem
    • Injector is too small
  • Solution
    • Install a larger injector
    • Install smaller spray nozzles on the applicator
    • Remove spray nozzles from the applicator

No water flow through injectors #

  • Problem
    • Manifold solenoid isolation ball valve closed
  • Solution
    • Open the ball valve and verify water flow through the solenoid to the injector

  • Problem
    • Debris in solenoid
  • Solution
    • Check there is the correct voltage to the coil of the solenoid.
      • Isolate solenoid
      • Disassemble solenoid and check for debris
      • Clean as necessary
      • Reassemble solenoid

  • Problem
    • Faulty solenoid
  • Solution
    • Rinse the injector off with hot water with compressed air blow air through the following:
      • Injector chemical hose barb
      • Injector nozzle
    • Remove the injector nozzle; clean and reassemble  (allen key required to remove injector)

Water flows to applicator nonstop #

  • Problem
    • Function is energized
  • Solution
    • Check tunnel controller for overrides and stuck relays

  • Problem
    • Debris in solenoid
  • Solution
    • Isolate the functions solenoid using the ball valve.
    • Follow the directions for solenoid valve disassembly, check the valve for debris or worn parts

  • Problem
    • Faulty solenoid
  • Solution
    • Install repair kit in solenoid or replace solenoid

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