INST 291 RC9 Series Controller V12_17
13
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Poor water circulation
•
Injection point at delivery end is blocked
•
Dosing pump is undersized
•
Probe malfunction
Low pH
•
Poor water circulation
•
Excessive rainfall (neutralising TA)
•
Faulty dosing pump
•
Probe malfunction
High pH
•
Acid drum is empty
•
Acid is over-diluted
•
Filter: run timing is not sufficient or
requires back washing
•
Probe malfunction
RC9 – MAINTENANCE
1.
Lubricate the squeeze (pump) tube every 6 months, more often in commercial applications. Use only the
recommended lubricant “RC Tube Lube” available from AstralPool dealers or any other compatible silicone
lubricant, otherwise damage to the tube is possible. Do not use any petroleum based lubricants.
2.
Depending upon usage, the squeeze tube may need replacement after 12months on a domestic installation, and
earlier on a commercial installation. Before replacing the tube make sure that any stop valves in the filter system
are closed. Otherwise water loss may occur.
a.
To replace the tubes, remove the retaining screws and the pump head and pull the tube free. Disconnect
the squeeze tube from the barbs and fit the new squeeze tube. Ensure the new tube has sufficient
lubrication. Make sure that the new tube is correctly connected to the PVC tubing as per instructions.
Reposition the squeeze tube in the unit as before, replace the pump head and retaining screws. PLEASE
DO NOT OVERTIGHTEN THE RETAINING SCREWS
3.
The Injection Point through which the chemical discharges into the pipeline should be checked periodically for any
build up of solid matter in the end of the PVC tubing and kept clean. Blockages can be caused by stale or poor
quality chlorine or improper water chemistry. This may cause blockages and not allow the chemical to pass
through the line and will alter the pH or ORP levels and may cause the squeeze tube to come off the barbs
4.
The probes/sensors are sensitive instruments. To maintain their accuracy they should be cleaned periodically by
household detergent abrasive like Jiff. Jiff is the preferred option. The ORP probe tip can be contaminated
(generally observed by a copper or brownish coating – this should always look shiny silver) which will give a false
reading to the Controller causing no dosing/over dosing of chemical. As the pH sensor tip is made of glass, please
take care, for even a hair line crack can cause the sensor to read incorrectly causing malfunction.
5.
After cleaning the sensors/probes, wash with water, allow 5-10min. to settle and check calibration or re-calibrate if
necessary. Copper based algaecides should be avoided, but if used the cleaning procedure for the ORP sensor
can be more frequent, as copper will coat the sensor tip (made of platinum) more rapidly.
USE OF A SUN SCREEN CHEMICAL (CYANURIC ACID) FOR OUTDOOR POOLS IS RECOMMENDED.
CHECK WITH YOUR LOCAL POOL SHOP AND USE THE CORRECT DOSAGE. MAKE SURE YOUR POOL WATER IS
WELL BALANCED WITH THE CORRECT pH, TDS, TA AND STABILISER LEVELS AND FREE FROM PHOSPHATES.
RC9 -TROUBLE SHOOTING GUIDE
TROUBLE
POSSIBLE CAUSE/SOLUTION
pH reading incorrect
*
Clean the sensor.
*
Check calibration of sensor in the pH cal. sol.
*
Check water balance & correct if reqd.
ORP reading incorrect
*
Clean sensor.
*
Check calibration of sensor in ORP Cal. sol.
*
Check water balance, especially pH.
Dosing pump does not operate as it
should
*
Is Setpoint level altered?
The Roller (H) Block on the inside of
the unit does not dispense chemicals
*
No chemicals in the tank.
*
Injection point blocked.
*
Air leak at the connection where the tube from the
drum connects onto the pump tube.
*
Chemical container airtight.
*
Roller or H block broken.
*
Pump head cracked.
