Daikin Altherma 3 M - Reversed Piping or Bad Communication Wiring Detection

2 | Troubleshooting
Service manual
66
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check for improper combination of the indoor unit and the water tank. See
the combination table in the Databook for more information.
2 Check the setting [E‑05] and [E‑07] via the user interface. See "3.21 User
interface"[4266].
Possible cause: Faulty [E‑05] or [E‑07] setting.
3 Perform a check of the hydro PCB. See "3.12Hydro PCB"[4160].
Possible cause: Faulty hydro PCB.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.3.83 UF-00 – Reversed piping or bad communication wiring detection
Trigger Effect Reset
Reversed piping or bad
communication, wiring
detection.
Unit will NOT start
operating.
Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check that all stop valves of the refrigerant circuit are open. See
"4.2Refrigerant circuit"[4286].
Possible cause: Closed stop valve in the refrigerant circuit.
2 Check that the piping and wiring connections of the system are correctly
installed. See "6.3Piping diagram"[4331] and "6.2Wiring diagram"[4314].
Possible cause: Piping and/or wiring mismatch.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.