Lennox VRF / VRV

Lennox VRF / VRV Error Code E101

VRF / VRV

E101 means different things on different VRF / VRV models. Enter your model number to see only your reading, or find your model below.

What It Means

  • VHEC***S4-4P, VHTC***S4-4P: Communication error between Hydro unit / Hydro unit HT and outdoor unit (When Hydro unit / Hydro unit HT is having trouble with receiving data from outdoor unit)
  • V36C***S4-4P: No communication occurs between the indoor and outdoor units for 2 minutes.

Causes & actions from Lennox

Communication error between Hydro unit / Hydro unit HT and outdoor unit (When Hydro unit / Hydro unit HT is having trouble with receiving data from outdoor unit)

Models: VHEC***S4-4P, VHTC***S4-4P

Hydro unit (indoor)

How it shows
  • hydro main pcb display: E101
  • hydro wired controller display: E101

This manual entry does not list further causes or actions.

Applicable models & manual sources
  • VHEC***S4-4P

    Communication error between Hydro unit / Hydro unit HT and outdoor unit (When Hydro unit / Hydro unit HT is having trouble with receiving data from outdoor unit)

    VHEC***S4-4P, VHTC***S4-4P

    VHEC***S4-4P manual, page 65

No communication occurs between the indoor and outdoor units for 2 minutes.

Models: V36C***S4-4P

VRF indoor unit (indoor)

How it shows
  • vrf 360 fault code: E101
  • vrf 360 indoor indicator: ice_blue: off, yellow_green: flashing, blue: off, red: off (blue: off, ice_blue: off, red: off, yellow_green: flashing)

This manual entry does not list further causes or actions.

Applicable models & manual sources
Disclaimer: This information is for general reference. Code wording and instructions vary by model. Always follow the service manual for your exact unit.

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