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Sub-Zero Classic Series (BI) LO L1 Low Voltage


  • What does L0 L1 (L0L1, LO L1, LOL1, lo l1, l0l1) on a Classic series (BI) unit mean?
  • L0 L1 (L0L1, LO L1, LOL1) is shown on control panel when the unit is powered by a generator
  • Low voltage and brownout considerations for BI Series units
  • LO L1


When Classic series (BI) units show L0 L1 on the control panel, it indicates a low voltage or brownout condition. This means that the unit is not getting enough voltage to work properly.

  • Applying low voltage for an extended period of time may interfere with the compressor startup voltage requirements and may cause damage to compressor electricals.
  • To avoid damage, turn the unit off until full power is restored. Then turn the unit back on.
  • If the home is susceptible to power surges or frequent brownouts (a drop in voltage in an electrical power supply system), contact a qualified electrician.

If these steps do not resolve the issue, no further troubleshooting advice is available. Contact Factory Certified Service to schedule an appointment for repair.


Need further assistance? Contact Customer Care at 800.222.7820 or provide your information below and request a Customer Care representative contact you.

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