Troubleshooting
334513N
27
Troubleshooting
, page 23,
before checking or repairing the pump.
2. Check all possible problems and causes before dis
-
assembling the pump.
To reduce the risk of injury due to burns, allow ade
-
quate time for the motor to cool before performing any
troubleshooting tasks.
Problem
Cause
Solution
Pump runs, but chemical does not
discharge at the correct rate
(Fluid in calibration column is “bounc
-
ing” during calibration)
Inlet check is clogged with debris
Remove debris from the check valve.
Inlet check o-ring is damaged
Evaluate o-ring chemical compatibil
-
ity and replace as required.
Air in pump head
Ensure the suction lines are tight and
then prime the pump.
Injection into a gas line: Inspect the
outlet check valve to ensure gas is
not back-feeding into the pump head.
Packing leak
Tighten the packing nut. If leak per
-
sist, evaluate packing chemical com
-
patibility and replace.
Inadequate chemical supply
Ensure the chemical tank is filled.
Inspect and replace the chemical
supply filter.
Incorrect calibration
Ensure the calibration gauge is func
-
tioning properly with good venting.
