What It Means
- 19. Simultaneous opening of the cooling and heating MSB SOL valves (2nd detection)
Lennox VRF / VRV
Lennox VRF / VRV Error Code E181
VRF / VRV: VRF indoor unit (indoor)
Causes & actions from Lennox
How it shows
- vrf 360 fault code: E181
- vrf 360 indoor indicator: ice_blue: off, yellow_green: off, blue: flashing, red: off (blue: flashing, ice_blue: off, red: off, yellow_green: off)
This manual entry does not list further causes or actions.
Applicable models & manual sources
- V36C***S4-4P
19. Simultaneous opening of the cooling and heating MSB SOL valves (2nd detection)
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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