Rehlko

UNDERVOLTAGE

UnclassifiedElectrical

What This Code Means

LED display communicates faults; Generator shut down; Controller displays fault (underspeed, underfrequency, or undervoltage)

Possible Causes

  • •Blocked air inlets
  • •Blocked exhaust outlets
  • •Excess heat inside the enclosure
  • •High battery voltage
  • •High engine temperature
  • •Low battery voltage
  • •Low oil pressure
  • •Overcrank safety
  • •Overfrequency
  • •Overspeed
  • •Overvoltage
  • •Thermostat tripped due to excess heat inside the enclosure
  • •Thermostat trips
  • •Underfrequency
  • •Undervoltage

Suggested Actions

  1. 1Check for blocked air inlets and exhaust outlets
  2. 2Check for blocked air inlets and exhaust outlets.
  3. 3Disconnect the utility power to the generator by opening (turning OFF) the corresponding circuit breaker at the building's distribution panel
  4. 4Open the enclosure roof and secure it with the roof stay on the left side of the enclosure
  5. 5Press the button on the thermostat to reset it
  6. 6Reconnect utility power to the generator set by closing the circuit breaker in the distribution panel
  7. 7Remove the air intake panel
  8. 8Replace the air intake panel
  9. 9Reset the fault on the controller
  10. 10Reset the thermostat
  11. 11Reset the thermostat.

Related Rehlko Fault Codes

UUVOLTAGE L1 - L2 HIGHUNDERSPEEDVOLTAGE L1 - L2 LOWUNDERFREQUENCYUL 94 HF1UFVOLTS L1 - L2 HIGHSVOLTS L1 - L2 LOW
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