Rev. H • Rev. H • Rév. H 12-9-99 9 P/N • Núm/Pte. • Réf. P/N 99226000
SECTION IV. TROUBLE SHOOTING.
System Problem Cause Remedy
Pool water not 1. Pool chemistry not adequate to inhibit algae growth. Maintain pool chemistry or consult pool service technician.
sufficiently clean. 2. Backwashing too frequently. Allow pressure to build to 5-11 psi above clean filter condition before
backwashing, see SECTION II, G.5.
3. Improper amount or wrong sand size. Check sand bed depth and sand size or consult pool service technician.
4. Inadequate turnover rate. Run system for longer time or consult pool service technician.
High filter pressure. 1. Insufficient backwashing. Backwash until water runs clear.
2. Sand bed plugged with mineral deposits. Chemically clean filter and/or change sand, see SECTION I.
3. Partially closed valve or restriction in return. Open valve or remove obstruction in return line.
Requires frequent backwash 1. Improper backwash. Backwash until water runs clear.
(short filter cycle). 2. Pool chemistry not adequate to inhibit algae growth. Maintain pool chemistry or consult pool service technician.
3. Plugged sand bed. Manually remove top 1 in. surface of sand bed and chemically clean as
required.
4. Flow rate too high. Restrict flow to capacity of filter.
Return flow to pool diminished 1. Obstruction in pump hair and lint strainer. Clean basket in strainer.
and low filter pressure. 2. Obstruction in pump. Disassemble and clean pump.
3. Obstruction in suction line to pump. Clean skimmer basket. Remove obstruction in lines. Open valves in
suction line.
Sand returning to pool. 1. Broken underdrain lateral. Replace broken or damaged laterals.
2. Backwash rate too high. Reduce backwash flow rate.
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