Parker AQUA DUO - A455C, Technical Manual

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replace it.
Product Water 3-way Diversion Valve does not switch to “safe water,” potable water.
1. First see "3-WAY PRODUCT WATER DIVERSION VALVE ABNORMALITIES" in part C, Chapter 7.
2. The Water Quality greater than 1000ppm the 3-way Product Water Diversion Valve is not
energized; it is sending the Product Water to Brine Discharge overboard. Using a handheld TDS
Meter check the salinity of the Product Water. If the Salinity of the Product Water is greater
than 800 PPM TDS, then the Salinity controller is reading properly and diverting the
“unpotable water” Product Water by not energizing the 3 -way Diversion Valve. This is
normal and the problem lies in the RO Membrane Element. See "PRODUCT WATER FLOW
AND PRODUCT WATER QUALITY," section 7.2.
3. The 3-way Product Water Diversion Valve is not energized; it is sending the Product Water to
Brine Discharge overboard.
Danger: ELECTRICAL SHOCK HAZARD. A Volt / Ohm Meter will be necessary. The following
procedures expose the technician to High Voltage and electrical shock hazard. Only attempt
this if you are a qualified electrician and only if surrounding conditions are safe.
•
With the system in operation and The Water Quality less than 1000ppm , remove the
Controller Enclosure front panel to expose the inside of the controller box components.
•
With the system in operation and The Water Quality less than 1000ppm, measure the
voltage at the terminals labeled 3-Way Product Water Diversion Valve. The voltage should
be 12 VDC.
•
If no voltage is present replace the Control Printed Circuit Board.
•
If 12 VDC is present, see "PRODUCT WATER FLOW AND PRODUCT WATER QUALITY" in Part
B, Chapter 7.
Product Water salinity is confirmed (verified with a handheld TDS meter) to be less than 800
PPM TDS, however the water quality LED is illuminated RED
“unpotable water.”
7.6 Maintenance and Repair
Are you mechanically inclined?
Troubleshooting and subsequent correction or repair will require understanding of:
•
Electrical Circuits
•
Electronic Circuits
•
Electric Motors
•
Hydraulic Systems
•
Liquid Pressures and Flows
•
Electromechanical Systems
•
Mechanical knowledge and skills
Do not attempt troubleshooting and/or subsequent correction or repair if you are not familiar