Hydra-Flex Aqua-Lab MD Operating Manual - Manual (Page 11)

Operating Manual
© Hydra-Flex Inc 2011 - 11 -
Troubleshooting
Pump Issues
Problem Potential Causes Solutions
Pump Operates, but
only delivering 100-
150 psi
Incorrect Motor Rotation Reverse rotation by interchanging two leads
Pump Operates, but
delivers little or no
water
Pump not Primed See Priming Instructions
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
Pump won’t start or
run at full speed
Current sensor not seeing any current Turn on one valve and verify red light blinks fast,
verify at least 10 wraps of wire around current
sensor.
Constant Hot Not Connected Make sure constant control voltage is supplied to
brown wire on yellow cable in car wash controller.
Blown fuse or circuit breaker Could be due to blown pump motor. Try to turn
breaker back on or replace fuse. If breaker trips
after trying to fire motor, motor is most likely burned
out. Replace with new motor and pump.
Defective Motor Starter contactor Replace motor starter contactor
Thermal Overload set too 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
Excessive Noise
from Pump
Not primed Reprime Pump
Pump not secured firmly Secure properly
Restricted Inlet Clean or correct restriction
Water regulator fluttering / chattering Try to adjust regulator down and then back up or
replace regulator
Cavitation (sounds like marbles in
pump) Increase inlet size
Pump Leaks Worn mechanical seal Replace Pump
Injector Issues
Problem Potential Causes Solutions
Injector is not
drawing chemical –
PASSES vacuum
pressure check
Clogged chemical feed Check chemical hose, foot valve, metering tip and
hose barb for debris or clogs
Injector is not
drawing chemical –
FAILS vacuum
pressure check
Too much back pressure on injector Clean or replace downstream check valves,
increase nozzle size or quantity, use larger tubing,
or use smaller flow injectors
Clogged injector check valve Blow compressed air through the chemical hose
barb on the injector to remove debris