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Home›Repair guides›Field Flashing to Restore Residual Magnetism

Power Tech SAld4ds — Field Flashing to Restore Residual Magnetism

For the Power Tech SAld4ds.

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Before you start

  • If battery is connected for too long, overheating and subsequent damage to the exciter can occur.
  • If the polarity of the exciter is reversed by flashing the field, it may be corrected by interchanging the battery leads.

Procedure

  1. Disconnect exciter field coil wire F + at terminal F+.
  2. Connect battery positive lead to field coil lead F+. Use 12 volt battery.
  3. Connect battery negative lead to field coil circuit terminal C-.
  4. Disconnect battery leads after approximately 3 to 5 seconds. If battery is connected for too long, overheating and subsequent damage to the exciter can occur.
  5. Reconnect field coil lead F+ to terminal F +.
  6. Start unit and observe generator build-up.
  7. Reflash field (Steps 1 through 5 above) if generator output voltage does not build up.

Specs & torque values

  • 12 volt battery
  • 3 to 5 seconds connection time

Source: manual:POWERTRONICS Home Standby 1993.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.