TROUBLESHOOTING
SYMPTOM | POSSIBLE CAUSES | REMEDIES |
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Low permeate flow rate | Operating on cold water less | Install a hot/cold feed water |
(continued) | than 13°C (55°F) | tempering valve if more per- |
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| meate flow is needed. |
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| Operate with a feed water |
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| temperature of 22° - 25°C |
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| (72° |
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| Membrane elements installed | Install membrane elements in |
| backward or damaged concen- | the direction of fluid flow. |
| trate seal | Flush and clean the machine |
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| immediately. Membrane ele- |
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| ments with damaged seals |
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| should be cleaned and may be |
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| returned for repair. |
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Low concentrate flow rate, | Concentrate valve plugged | Remove the concentrate valve |
normal or higher than normal |
| and/or disassemble the |
pressure |
| plumbing. Clean the valve. |
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| Concentrate outline line | Examine the concentrate line |
| restricted | for obstructions or kinks, |
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| repair or replace the tubing. |
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| Flow meter inaccurate | Check the flow rate manually |
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| with a stopwatch and calibrat- |
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| ed container. |
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| Dirty concentrate valve | Disassemble and clean the |
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| plumbing to the valve. |
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