Installation and Service Manual – Under-the-Counter Point of Use 6 Stage Reverse Osmosis System with Pump & UV
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Page 20
Pump Troubleshooting
The pump will not run:
Start at the source to determine where the electrical current flow has been interrupted. Use a multi-
meter to check the line voltage, and the transformer output. If the transformer is not functioning properly
its current capacity may have been exceeded. Replacement may be necessary.
If the transformer is properly sized, and is delivering the correct voltage to the system, remove the
holding tank pressure switch (PSW) from the system by disengaging both connectors, and connecting
the pump directly to the transformer.
o
If the pump now runs, the pressure switch is faulty, and needs adjusted or replaced.
o
If the pump still fails to run, the electrical path has been interrupted within the motor, and should
be replaced.
The flow and/or pressure is too low:
Most Aquatec boost pumps are designed to limit the maximum output pressure to 110 psi, to protect the
membrane and other components from damage. The normal operating pressure as measured after the pump,
and before the membrane, will be approximately 80 psi. The flow rate of the 8800 series pump during
operation is about 1,000 ml/min. If these parameters are not being met, please check the following:
Is the system receiving adequate feed water? The pump’s inlet chamber must be flooded to prevent
performance robbing air ingestion into the compression chambers.
Debris entering the pump may restrict the pumping operation. Consult the factory for valve cleaning
instructions.
The pump operation is too noisy:
Boost pumps operate at relatively slow speeds, accounting for their quiet operation. Pumps that exceed
expected noise levels usually have one of the following problems:
Entrapped air (which will eventually dissipate). Make sure air is not being drawn into the pump.
Water may have damaged the bearings, or other motor components. Check for internal leaks, as well
as water entering the motor from an external source.
Squeaking may be associated with the by-pass mechanism; brush contact with the commutator
surface; or inadequate lubrication in the rear bearing. Consult the factory.
The pump is causing electrical noise interference:
Try locating the pump on a dedicated electrical circuit, separate from the device that is being interfered
with.
Consult factory for pumps available with electronic noise suppression.
Can a Permeate Pump and a Booster Pump be used together in an RO system?
Yes. The Booster Pump increases the feed water pressure to the membrane, while the Permeate Pump is
located after the membrane and eliminates the performance robbing back pressure created by a full, or filling,
air charged storage tank
