Dometic SPOTZERO SZIII 2000, User Manual & Installation Manual

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Troubleshooting Guide
SYMPTOMS POSSIBLE CAUSES CORRECTIVE ACTION
LOW PERMEATE OR LOW
PRODUCT FLOW
Cold feed water See temperature correction sheet
Low operating pressure Adjust throttle and concentrate valve
Defective membrane brine seal/
Membrane installed backwards
Replace brine seal and/or reposition
membranes
Fouled or scaled membrane Clean membranes
Damaged product tube O-rings Inspect and/or replace
HIGH PERMEATE OR PRODUCT
FLOW
Damaged or oxidized membrane Replace membranes
High feed water See temperature correction sheet
Low operating pressure Adjust the concentrate valve
POOR PERMEATE QUALITY
Damage product tube O-rings Inspect and/or replace
Damaged or oxidized membrane from
Chlorine or Chloramine in feed water
Replace membrane and be sure that
prefilter is changed every 100 hours
MEMBRANE FOULING
Scaling (CaSO4, CaSO3, BaSO4, SiO2)
Clean with CH-04 Chemical Cleaner.
Check for overproduction
Trapped sediment media Replace membrane, check filtration
Chlorine Oxidation
Check for chlorine in feed water. Be
sure that the prefilter is changed
every 100 hours.
SYSTEM DOES NOT TURN ON
Insufficient Power to the unit
Check for loose wires. Test Voltage to
ensure proper load requirements
Insufficient feed flow
Check for damaged or kinked lines.
Ensure filter is not clogged. Check
feed water flow rate
Faulty Tank Level Sensor
Check for loose connections. Replace
if necessary
Abnormal Product Flow
As time progresses, the efficiency of the membrane will be reduced. In general, the rejection rate
does not change significantly until approximately 1,000 hours after installation when operated using
properly pretreated feed water. The permeate flow rate will begin to decline slightly after one year of
operation but can be extended with diligent flushing and cleaning of the system. A high pH and/or
precipitation of hardness can cause premature loss in rejection.
Permeate flow should be within 20% of the rated production after correcting the feed water
temperatures above or below 77°F. Check your permeate flow meter to determine the permeate flow
rate.
NOTE
To determine the temperature correction factor, locate the temperature correction table in
this user manual and follow the directions on pg. 21
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