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Generator services

Generator repairs and fault diagnosis

EMPS diagnoses and repairs existing generators, including units supplied or installed by other companies. We investigate the reported fault, explain the findings and confirm the required repairs before replacing components.

Starting, shutdown and transfer faults

A generator that will not crank needs a different investigation from one that cranks but fails to start. Unplanned shutdowns, lack of electrical output and failure to transfer the building load also require different tests. Controller alarms and the sequence of events help narrow the investigation.

Mechanical and electrical repairs

Repair work can involve starting and charging circuits, fuel delivery, cooling, wiring, controls and generating components. After the repair, checks should address the original fault and confirm the affected functions. Testing under load is arranged where needed to assess operating performance.

Correct replacement components

Replacement parts are selected against the engine, alternator or controller specification. A similar appearance does not establish electrical or mechanical compatibility. Parts availability and any additional work identified during testing are confirmed before proceeding.

AVR and alternator faults

An automatic voltage regulator (AVR) controls alternator excitation to regulate output voltage. Low, high or unstable voltage can also involve sensing connections, excitation components, windings or the connected load. Frequency problems require engine-speed and governor checks as well. Diagnosis is needed before deciding whether the AVR, alternator or another component requires repair.

Request repair assistance

Send the site location, generator details and any controller alarm or fault code. Explain whether the problem occurs during manual starting, automatic starting or load transfer. Response and repair times depend on access, technician availability, the fault and any parts required.

What to expect

Information that helps diagnose a fault

The checks and work required depend on the generator model, its condition and the installation. We agree the work with you before proceeding.

  • Site address and access contact
  • Generator make, model, capacity and engine details
  • What happens when a start is attempted
  • Controller alarm text or a clear display photograph
  • Whether manual operation, automatic operation or both are affected
  • Recent servicing, electrical changes or fuel problems
Project photographs

Project photographs

Photographs for this service will be added when suitable EMPS project images are available.

Service questions

Frequently asked questions

Can you repair a generator supplied by another company?

Yes. We assess existing generators regardless of who supplied them. The repair recommendation depends on the fault, condition of the equipment and availability of suitable parts.

Do you handle mechanical and electrical faults?

Yes. Repair enquiries include starting, fuel, cooling, charging, output, controller, wiring and changeover problems. Testing identifies the corrective work required.

How long does a generator repair take?

Some faults can be resolved during the initial visit; others require parts or further testing. We can give a more useful estimate once the fault has been diagnosed. A call-out time is not a guarantee of repair completion.

Need help with generator repairs?

Send your location, generator details and service requirements to request a quotation.