Daikin Altherma 3 H F - Page 184

14 | Troubleshooting
Installer reference guide
184
EPGA11~16DAV3(7) + EAVZ16S18+23DA6V(7)+9W
Daikin Altherma 3 H F
4P556075-1A – 2021.09
Error code Detailed error code Description
U8 04 Unknown USB device
U8 05 File malfunction
U8 07 P1P2 communication error
UA 00 Indoor unit, outdoor unit
matching problem
UA 16 Extension/hydro communication
problem
UA 17 Tank type problem
UA 21 Extension/hydro mismatch
problem
UA 22 Communication problem between
control box and option box
UF 00 Reversed piping or bad
communication wiring
detection
INFORMATION
In case of error code AH and no interruption of the disinfection function occurred
due to domestic hot water tapping, following actions are recommended:
▪ When the Reheat only or Schedule + reheat mode is selected, it is
recommended to program the start-up of the disinfection function at least
4hours later than the last expected large hot water tapping. This start-up can be
set by installer settings (disinfection function).
▪ When the Schedule only mode is selected, it is recommended to program an
Eco action 3hours before the scheduled start-up of the disinfection function to
preheat the tank.
NOTICE
When the minimum water flow is lower than described in the table below, the unit
will temporarily stop operation and the user interface will display error 7H‑01. After
some time, this error will reset automatically and the unit will resume operation.
Minimum required flow rate
20l/min
INFORMATION
Error AJ-03 is reset automatically from the moment there is a normal tank heat-up.
INFORMATION
In case of an E7‑62 error, brine pump operation stops due to not enough flow in the
brine circuit. If 10‑day brine pump operation is running, it will stop running and will
only resume once the error is reset. It is only possible to reset the error with the
domestic hot water home screen or the leaving water temperature home screen
turned ON. To reset the error, press and confirm by pressing .