TROUBLESHOOTING GUIDE
SYMPTOM | POSSIBLE CAUSES | REMEDIES | |
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Low permeate flow rate | Dirty or fouled membrane | Flush and clean the membrane | |
(continued) | elements | elements. | |
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| Operating on cold water less | Install a hot/cold feed water | |
| than 55ºF (13ºC) | tempering valve if more perme- | |
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| ate flow is needed. Operate | |
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| with a feed water temperature of | |
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| 72º - 77ºF (22º - 25ºC). | |
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| Membrane elements installed | Install membrane elements in | |
| backwards or damaged | the direction of fluid flow. | |
| concentrate seal | Flush and clean the machine | |
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| immediately. Membrane ele- | |
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| ments with damaged concentrate | |
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| seals should be cleaned and may | |
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| be returned for repair. | |
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| Flow meter inaccurate | Check the flow rate manually | |
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| with a stopwatch and calibrated | |
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| container. | |
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Low concentrate flow rate, | Concentrate valve plugged | Remove the concentrate valve | |
| stem and/or disassemble the | ||
normal or higher than |
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| plumbing. Clean the valve. | ||
normal pressure |
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| Concentrate outlet line restricted | Examine the concentrate line for | |
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| obstructions or kinks, repair or | |
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| replace the tubing. | |
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| Flow meter inaccurate | Check the flow rate manually | |
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| with a calibrated container. | |
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Pressure does not drop when | Dirty concentrate valve | Disassemble and clean the | |
concentrate valve opened | |||
| plumbing to the valve. | ||
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