8-3: Systems Troubleshooting
CHEMICAL SYSTEM
1.0 System will not prime
Possible Cause Solution
1.1 The check valves in
chemical pump are faulty.
Remove the valves and inspect. Clean or replace as
necessary.
1.2 The chemical pump
diaphragm is faulty.
Remove and inspect. Replace as necessary.
1.3 The check valve in high
pressure pump is faulty
(piston which chemical
pump is attached to).
Remove the valve and inspect. Clean or replace as
necessary.
1.4 The lter on feed line in
chemical jug is clogged.
Inspect and clean.
1.5 The feed line from
chemical jug is loose,
pinched or damaged.
Inspect and repair.
1.6 The chemical selector
valve is faulty.
Inspect the valve for leaks between ports. Replace
as necessary.
2.0 Chemical ow is unstable or low
Possible Cause Solution
2.1 Air is in the lines. Check that all ttings and connections are tight and
in good condition. Repair or replace as necessary.
2.2 The lter screen in the
chemical jug is partially
obstructed.
Inspect and clean.
2.3 The chemical selector
valve is faulty.
Inspect the valve for leaks between ports. Replace
as necessary.
2.4 The chemical metering
valve is faulty.
Remove and inspect the valve. Clean or replace as
necessary.
2.5 The high pressure check
valve is faulty.
Remove and inspect the valve. Clean or replace as
necessary.
3.0 Chemical is present in water box
Possible Cause Solution
3.1 The chemical pump
diaphragm is faulty.
Remove and inspect the chemical pump diaphragm.
Replace as necessary.
3.2 The high pressure check
valve is faulty.
Remove and inspect the valve. Clean or replace as
necessary.
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