Walchem WCT400 Instruction Manual download pdf (Page 42)

7.3 Procedure for Evaluation of Conductivity Electrode

Can be used for troubleshooting low conductivity, high conductivity, conductivity stuck at 0, and/or

conductivity stuck at a number other than 0.

Try cleaning the electrode first (refer to Sect. 6.1).

To find out if the electrode or the controller is faulty, step through the Self-Test menu, as described in

section 5.2. The display should read 1000 ±100 µS/cm. This indicates that the controller is OK and the

problem is in the electrode or its connections. If it does not read 1000 ±100 µS/cm, return the control

module for repair.

To check the electrode, check the electrode connections to the terminal strip (refer to Figure 3). Make

sure that the correct colors go to the correct terminals, and that the connections are tight. Restore power

and see if the conductivity is back to normal. If not, replace the electrode.

8.0 SERVICE POLICY

The WCT series Cooling Tower Conductivity Controller has a 2-year warranty on electronic

components and a 1-year warranty on mechanical parts (keypad, terminal strip and relays).

We stock circuit boards for immediate exchange after we have isolated the cause of the problem.

Factory authorized repairs that are received by next-day-air will be returned within 24 hours. Normal

priority for returns is two weeks.

Out of warranty repairs or circuit board exchanges are done on a flat fee basis after the warranty is

expired.

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Walchem WCT400 Instruction Manual Page 42