Daikin Altherma R Hybrid Installer's Reference Manual page 164

10 | Commissioning
Installer reference guide
164
NOTICE
If an 81‑04 error occurs, then do NOT perform a test run on the gas boiler.
NOTICE
During the maintenance of the boiler, the direct expansion indoor unit is NOT
allowed to operate.
CHYHBH05+08AF + EHYKOMB33A
Daikin Altherma R Hybrid
4P471761-1E – 2020.10