Pentair Modular DE Filter PLDE48 - Manual (Page 11)

11
1. Short Cycle Time:
NOTICE: Cycle Time will vary with each installation and be-
tween different areas of the country. The following causes and
remedies are for cycle times shorter than normal for your area.
A. Chlorine residual too low; maintain proper residual (con-
sult pool professional for recommendation).
B. Flow rate too high; restrict flow to rated capacity of filter
(see instruction plate on filter or specifications on Page 4).
C. Filter is too small; install an additional filter.
D. Improper/insufficient precoat; see precoat instructions
(Page 5).
E. Filter module is dirty or plugged; thoroughly clean the fil-
ter (see No. 4, “Plugged Module Cloth”, and “Module
Cleaning Procedure", Page 8).
F. Too much DE; check for clogged filter module.
G. Water is chemically out of balance; consult pool
professional.
H. Algae in the pool. Apply heavy dose of chlorine or
algicide as recommended by the pool manufacturer.
2. Low Flow/High Pressure:
A. Elements plugged; clean filter thoroughly (see Page 8).
B. Pipe blocked downstream from filter; remove obstruction.
C. Piping too small; use larger pipe (consult dealer for sizing).
D. Filter area too small; install an auxiliary filter (consult
dealer for recommendation).
E. Outlet port check valve obstructed (if applicable);
remove obstruction to allow valve to open.
3. Low Flow/Low Pressure:
A. Pump too small; consult dealer for recommendations.
B. Plugged pump or plugged hair and lint trap; clean
thoroughly.
4. Plugged Module Cloth:
NOTICE: The pleated filter material may look matted after use.
However, as long as the DE adheres to the pleated cloth, the filter
is operating properly.
A. Insufficient precoat; see precoat instructions (Page 6).
B. Insufficient cleaning; follow cleaning instructions closely
and clean thoroughly (see Page 8).
C. Water is chemically out of balance; consult pool
professional.
D. Excessive air in filter; non-precoated areas may plug. Vent
air from tank and check for pump suction pipe leaks.
Clean air bleed filter in grid assembly with a hose and soft
flow nozzle.
E. Filter is too small. Install an additional filter.
F. Pool water contains iron. See “Special Cleaning
Instructions”, Page 8.
G. Algae in pool. Apply heavy dose of chlorine or algaecide
as recommended by the pool manufacturer.
H. Use of incorrect chemicals with PHMB sanitizers. Replace
filter module.
I. Not enough D.E. precoat. See precoat instructions
(Page 4).
5. Pool Water Not Clean:
A. Chlorine residual too low; maintain adequate
chlorine residual (consult pool service technician for
recommendation).
B. Broken filter module passing DE into pool; replace defec-
tive module.
C. Insufficient or improper precoat; follow precoating instruc-
tions and use recommended amount of DE (see Page 4).
D. Inadequate turnover rate; consult dealer to verify that
equipment is properly sized for your pool.
E. Pump is too large and is overpumping. Reduce the flow
rate.
F. The filter is installed backwards. Reinstall it correctly.
G. Pool water contains iron. See “Special Cleaning
Instructions”, Page 8.
H. Heavy or improper application of powdered chlorine
tablets using a binder. See “Special Cleaning Instructions”,
Page 8.
I. Algae in the pool. Apply heavy dose of chlorine or algi-
cide as recommended by the pool manufacturer.
6. Pool Accessories Stop Working:
A. Clean filter and observe performance of accessories.
B. If accessories perform better after filter has been cleaned,
use a shorter cleaning cycle for the filter (that is, clean the
filter after a pressure rise of less than 10 PSI).
TROUBLESHOOTING GUIDE