Hubbell Electric Heater Company J manual Section Iv - Troubleshooting Error Messages

a.Shut off power supply.

b.Remove front cover.

c. Visually inspect around heating element for evidence of leaks.

d.Rub around the heating element with a rag. Check for any evidence of moisture. If moisture is present or a water drip is observed, follow procedure outlined in Section V. CAUTION: The area around the heating element may be hot.

4.Scale and mineral build-up on heating elements is a normal condition. It is recommended that the heating element be removed for examination and if scaled, should be cleaned. In an area of known hard or poor water conditions, the elements may need to be checked more frequently. This will improve the efficiency of the heater and increase the element life.

NOTE: Failure of the elements due to scale and mineral build-up is not covered under warranty. See warranty for complete details.

a.Shut off power supply.

b.Drain the tank.

c.Remove front cover.

d.Disconnect the element wiring. It is recommended that one element at a time is removed to simplify re-wiring.

e.Unscrew element.

f.Lime scale removal

i.Place limed ends of the heating element in a de-limer solution, designed for potable water applications, and allow lime to dissolve. Do not allow de-limer to contact heating element terminals.

g.Other scale removal

i.Silicates, sulfates, and aluminates must be removed by scraping or other mechanical means. De-limers will not dissolve these types of scale.

h.Flush the cleaned ends of the elements with clean water.

i.Re-install element.

j.Re-attach element wires.

k.Continue until all heating elements are cleaned.

l.Fill the heater following the filling instructions provided in Section II and check around the elements for leaks.

m.Re-apply power.

5.Check for loose electrical connections. Tighten as necessary.

SECTION IV – TROUBLESHOOTING

ERROR MESSAGES

1.Err, No, Prb

a.This message will flash when the controller does not detect that the probe is connected to the control board. To clear this error reinsert the probe connector and press RESET.

2.Err, too, hot, ### (where ### is the actual temperature of the water.)

a.This message will display if the temperature of the water exceed the high limit temperature setpoint. To clear this error, wait until the temperature is below the operating setpoint and press RESET. Note that the unit will not reset until the indicated temperature is below 195°F. If this message continually occurs, follow the troubleshooting flow chart for continuous over- temperature condition.

3.Err, No, H2O

a.This message will display when the water level in the tank has dropped below the sensor probe. To clear this message, refill the tank. If the low water reset is set for automatic, the

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