11
SAND DOLLAR
®
and CRISTAL-FLO™ II
Top Mount Sand Filter Installation and User’s Guide
ENGLISH
TROUBLESHOOTING
Problem Cause Action
Pool water not
sufficiently
clean.
1. Pool chemistr y not adequate to inhibit
algae growth.
2. Too frequent a backwash cycle.
3. Improper amount or wrong sand size.
4. Inadequate turnover rate.
Maintain pool chemistry or consult service technician.
Allow pressure to build to 10PSI above clean filter
condition before backwashing.
Check sand bed depth and sand size or consult pool
service technician.
Run system for longer time or consult dealer or pool
service technician.
Higher filter
pressure.
1. Insufficient backwashing.
2. Sand bed plugging with mineral
deposits.
3. Partially closed valve or restriction.
Backwash until effluent runs clear.
Chemically clean filter.
Open valve or remove obstruction in return line.
Short filter
cycles.
1. Improper backwashing.
2. Pool chemistry not adequate to inhabit
algae growth.
3. Plugged sand bed.
4. Flow rate too high.
Backwash until effluent runs clear.
Maintain pool chemistry or consult pool service
technician.
Manually remove top 1” surface of sand bed and
chemically clean as required.
Restrict flow to capacity of filter.
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