Vaillant · Heat pumps · Vaillant aroTHERM plus with uniTOWER plus
S.240Compr. oil temp. too low, environment too cold
Name in the manufacturer's documentation (service manual): Compr. oil temp. too low, environment too cold
[1]
In plain words (editorial)
The compressor oil is too cold because the environment is too cold. The compressor heating is switched on and the unit does not start up yet.
When to call a service technician: Wait; if the message stays for a long time, contact a heating engineer.
✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.
The Polish page has more detail (plain-language explanation, safe checks, guides): Read in Polish →
Sources
Every statement has a footnote to the document and PDF page. “Quote verified” means the quote was found automatically in the text of that page.
- [1] Vaillant uniTOWER plus VIH QW 190/6 E – Operating, installation and maintenance instructions (0020291525_05) (0020291525_05) , p. 57 official manufacturer document quote verified
S.240 Compr. oil temp. too
- [2] Vaillant uniTOWER plus VIH QW 190/6 E – Operating, installation and maintenance instructions (0020291525_05) (0020291525_05) , p. 57 official manufacturer document quote verified
The compressor heating is switched on. The unit does not
- [3] Vaillant uniTOWER plus VIH QW 190/6 E – Operating, installation and maintenance instructions (0020291525_05) (0020291525_05) , p. 57 official manufacturer document quote verified
The compressor heating is switched on