7
lci1.com
574-537-8900
CCD-0001763
Rev: 08.07.18
Flow Max
™
12V DC
Fluid Pump
by Duraself
Installation and Owner’s Manual
(For Aftermarket Application)
What's Happening? What Should Be Done?
Pump will not start/
Blows circuit
Check electrical connections, fuse or breaker, main switch and ground connection.
Is the motor hot? Thermal breaker may have triggered; it will reset when cool.
Is voltage present at switch?
Check charging system for correct voltage (+ or - 10%) and good ground.
Check for an open or grounded circuit, motor or improperly-sized wire.
Check for seized or locked diaphragm assembly—water frozen?
Will Not Prime/Sputters
(No discharge/
Motor runs)
Check if the strainer is clogged with debris.
Check if there is water in the tank or whether air has collected in the hot water heater.
Check if the inlet tubing/plumbing is sucking air at plumbing connections—vacuum leak?
Is the inlet /outlet plumbing severely restricted or kinked?
Check proper voltage with the pump operating: + or - 10%
Check for debris in the pump inlet /outlet valves or if there are swollen or dry valves.
Check pump housing for cracks or loose drive assembly screws.
Rapid Cycling
Check for restrictive plumbing and flow restrictions in faucets/shower heads.
Ensure water filter/purifier is on separate line feed.
Check if pressure switch shutoff needs adjustment.
Pump Will Not Shut Off/
Runs When Faucet
Closed
Check output side (pressure) plumbing for leaks and inspect for leaky valves or toilet.
Check for trapped air in outlet side (water heater) or pump head.
Check for correct voltage to pump (+ or - 10%).
Check for loose drive assembly or pump head screws.
Check if the valves or internal check valve is held open by debris or if the rubber is swollen.
Check pressure switch operation. Refer to shutoff adjustment for switch.
Noisy or Rough
Operation
Check plumbing, which may have vibrated loose.
Check if the pump is plumbed with rigid pipe, causing noise to be transmitted.
Does the mounting surface amplify the noise? Check for loose mounting feet or if mounting
feet are compressed too tightly.
Check for loose pump head to motor screws. There are three long screws.
Leaks From Pump Head
or Switch
Check for loose screws at the switch or pump head.
Check if the switch diaphragm is ruptured or pinched.
Check for punctured pump diaphragm if water is present in the drive assembly.
Troubleshooting chart
Vibration caused by driving, sea conditions or transporting can loosen plumbing, strainers and pump hardware.
Check for loose system components. Many symptoms can be resolved by tightening hardware. Refer to the chart for
troubleshooting tips.