How to Troubleshoot No Voltage Output From an MX321

The Stamford MX321 is an automatic voltage regulator that can regulate the output of a generator to ensure that a specific voltage is output for your electrical devices. The device is factory-adjusted for a specific voltage, but there are minor adjustments that can be made. If your MX321 is not producing any voltage output, there are a few troubleshooting steps you can try before you take it to an authorized repair center.

Electrical contact cleaner
Wrench
Wire brush
Replacement wires and cables (optional)

Instructions

- 1
  Shut down the generator and the MX321 -- for safety reasons -- before making adjustments.
- 2
  Remove and inspect the circuit breaker to see if it has been tripped. You may need to remove an access cover to access the breaker. Replace the circuit breaker with a new one if necessary and move the breaker switch to “ON.”
- 3
  Check all electrical connections and terminals for signs of damage or corrosion. If a cable appears damaged, replace it with a new one.
- 4
  Clean corroded connections. Use the wrench to loosen the connection and clean both the wire and terminal with electrical contact cleaner, then scrub the corrosion away with a wire brush. Replace the wire and secure the connection.
- 5
  Start the generator and test the voltage with a multimeter or connect an appliance. If the device is still not supplying voltage, take it to an authorized repair center.

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