Excalibur EWR 4050, Installation, Operation & Service Manual

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Problem Possible Cause Solution
The Product Water and Drain
Water lines are reversed. Correct plumbing.
No drain flow, Reverse Osmosis
Drain Restrictor is clogged. Clear or replace Reverse Osmosis
Drain Restrictor.
The Reverse Osmosis ASO Valve
is not closing. Repair or replace the Reverse
Osmosis ASO Valve Components.
New In-Line or Activated Carbon
Pre-filter not rinsed completely. Flush with several full tanks of
Product Water.
High Total Dissolved Solids
(TDS) in the Product Water
(continued)
The Reverse Osmosis Feed Water
TDS has increased. An increase in Reverse Osmosis
Feed Water TDS will give a
corresponding increase in Product
Water TDS.
The In-Line or Activated Carbon
Pre-filter is exhausted. Replace Reverse Osmosis Filters.
There is foreign matter in the
Reverse Osmosis Holding Tank. Clean, flush and sanitize the
system. Replace the filters.
The Product Water and Reverse
Osmosis Drain Water lines are
reversed. Correct plumbing.
Dissolved gassed in the Reverse
Osmosis Feed Water. Pre-treat Reverse Osmosis Feed
Water to remove dissolved gasses.
Tastes and odors in the Reverse
Osmosis Product Water
Increase in Product Water TDS. See high TDS in the Reverse
Osmosis Product Water section.
Drain tubing is clogged. Clear tubing.
Drain clamp hole is misaligned. Align with hole in the drain pipe.
Reverse Osmosis Drain Water
overflows at the Air Gap Faucet
Excessive drain flow rate. Replace Reverse Osmosis Drain
Restrictor.
Adjust Reverse Osmosis Faucet by
turning the tee bar just below the
handle to provide a small amount
of free play in handle when shut off.
Leaks from spout.
O-rings are bad, repair or replace
faucet.
Leaks from base of the delivery
tube. O-ring is bad, replace O-ring.
Reverse Osmosis Faucet leaks
or drips
Leaks from beneath the handle. O-rings are bad. Repair or replace
the faucet.
Reverse Osmosis Fitting leaks in
general
Close the Reverse Osmosis Feed Water Ball Valve and relieve pressure
before disconnecting any tubing or replacing any fitting. Before replacing
a fitting, re-cut the tubing and re-insert into the fitting to see if that solves
the leak. If pipe threads are leaking, remove and re-tape with Teflon tape.
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