E13
Pulsar Phase Loss or Severe Voltage Imbalance

Generator display shows E13 (Phase Loss / Phase Imbalance) on three-phase Pulsar standby models; transfer switch may drop load.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Open stator winding on one phase, Loose phase output connection, Faulty transfer switch contacts, Damaged output breaker

How to Fix / Troubleshooting

Safety first: Three-phase systems carry lethal voltages. Only work inside the generator or transfer switch if you are qualified. Otherwise, contact a professional.

  • Visual inspection: With all power off and locked out, inspect the three-phase output lugs inside the Pulsar generator for loose or burned connections.
  • Check transfer switch: Open the transfer switch enclosure and look for burned or pitted contacts on the generator side. Ensure all lugs are tight.
  • Measure phase voltages: With the generator running and isolated from the building, measure voltage between each pair of phases. A missing or very low reading on one pair indicates a stator or breaker issue.

Phase loss typically requires stator or breaker replacement and should be handled by an experienced generator technician.

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Repair Difficulty

Professional Required 5/5

Required Part

Pulsar Stator Assembly
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