What It Means
- VHEC***S4-4P, VHTC***S4-4P: Communication error on indoor address incompletion
- V36C***S4-4P: The communication address is not confirmed. (NASA only)
Lennox VRF / VRV
Lennox Error Code E109
VRF / VRV
E109 means different things on different VRF / VRV models. Enter your model number to see only your reading, or find your model below.
Causes & actions from Lennox
Communication error on indoor address incompletion
Models: VHEC***S4-4P, VHTC***S4-4P
Hydro unit (indoor)
How it shows
- hydro main pcb display: E109
- hydro wired controller display: E109
This manual entry does not list further causes or actions.
Applicable models & manual sources
- VHEC***S4-4P
Communication error on indoor address incompletion
VHEC***S4-4P, VHTC***S4-4P
The communication address is not confirmed. (NASA only)
Models: V36C***S4-4P
VRF indoor unit (indoor)
How it shows
- vrf 360 fault code: E109
- 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
- V36C***S4-4P
The communication address is not confirmed. (NASA only)
Disclaimer: This information is for general reference. Code wording and instructions vary by model. Always follow the service manual for your exact unit.
What should you check next?
Continue in ACLogics with guided diagnosis for your equipment and symptoms.
