Hydra-Flex Aqua-Lab SD Operating Manual - Manual (Page 9)

Operating Manual
© Hydra-Flex Inc 2011 - 6 -
Troubleshooting
PROBLEM POTENTIAL CAUSES SOLUTIONS
Pump not primed See priming instructions
Inlet Restriction Check all in-line filters and inlet plumbing for restrictions. Check
valves and backflow preventers
Missing 1 of 3 Phases Wire according to diagram
Inadequate water supply Check pressure on inlet side of pump to be sure positive
pressure is maintained
Undersized piping Replace with larger piping
Leak on the Inlet side Make sure connections are tight
Worn or defective pump parts Replace worn parts or entire pump, Clean parts if required
Incorrect Motor rotation Reverse motor rotation by interchanging any two leads
Blown fuse or circuit breaker Replaced fuses or close circuit breaker
Defective Motor Starter
contactor Replaced motor starter contactor
Current Sensor set to high Verify wiring
Thermal Overload set to low Adjust setting on thermal overload to match voltage
Incorrect Motor Voltage Voltage must be within 10% of motor rated voltage
Defective motor Replace motor
E-Stop is depressed unlock E-Stop
Pump components damaged Replace worn part or entire pump
Not Primed Reprime pump
Pump not secured firmly Secure properly
Restricted Inlet Clean or correct restriction
Water regulator fluttering Try to adjust regulator down and then back up or replace
regulator
Cavitation (Sounds like marbles
in pump) Increase inlet size
Worn mechanical seal Replace shaft seal
Worn o-ring seals Replace
Injector is not
drawing chemical -
Passes Vacuum
Pressure check
test
Clogged chemical feed Check chemical hose, foot valve, metering tip and hose barb
for debris or clogs
Too much back pressure on
injector Perform back pressure check test outlined in Section IV if this
manual. If the result is higher than 66 psi then Increase arch
nozzle size or quantity, use larger tubing, or use a smaller flow
injector
Clogged injector check valve Blow compressed air through the chemical hose barb on the
injector to remove debris
Clogged injector nozzle Remove injector and blow out any debris with compressed air
Defective Injector If Vacuum check fails but Back Pressure is less than 66 psi,
replace the injector
Pump won't start or
run at full speed
Pump Operates, but
delivers little or no
water
Injector is not
drawing chemical -
Fails Vacuum
Pressure check
test
Pump Leaks
Excessive Noise from
Pump