Drive System Problems

Potential Problems:

Potential Causes:

Remedy:

  1. On a forced draft unit verify that the pump is on, and water is flowing over the coil. If the pump is off, and the unit was not sized for dry operation, the motor may over-amp.
  2. If the forced draft unit is ducted, verify that the design ESP matches the actual ESP.
  3. If a Cooler or Condenser, verify the correct pump rotation direction. If the pump is rotating incorrectly, it will result in less water flow, and therefore less overall static pressure.
  4. Check the basin water level against the recommended level.

Note:
Air density directly affects AMP reading. Low air density can cause the fans to spin faster, thus increasing the amp draw.

    Remedy:

    Check voltage across all three legs of the motor.

    Verify that the motor is wired per the wiring diagram, and connections are tight.

    Remedy:

    Verify that the fan is rotating in the correct direction. If not, switch the leads so it runs correctly.

    Remedy:

    Verify that the fan and motor turn freely by hand. If not, there may be damage to the internal motor components or bearings.

    Remedy:

    Check for proper belt tension. Extreme belt tension can cause the motor to overamp.

    Remedy:

    Stop motor and attempt to start it. Motor will not start again if single phased. Check wiring, controls and motor.

    Remedy:

    Check motor connections against wiring diagram on motor.

    Remedy:

    Check lubrication. Replace bad bearings.

    Remedy:

    Check voltage and current of all three lines. Correct if required.

    Remedy:

    Check and correct bracket fits or bearing.

    Remedy:

    Rebalance

    Remedy:

    Adjust cylinder to provide blade tip clearance

    Remedy:

    Reinstall or replace fan.