U8-07 - P1/P2 Communication Error; U8-11 - Connection With Wireless Gateway Lost - Daikin altherma 3 M Service Manual

2 | Troubleshooting
2.3.79 U8-07 – P1/P2 communication error
2.3.80 U8-11 – Connection with wireless gateway lost
Service manual
64
CAUTION
Always safely remove and eject media.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
Lost communication
between unit user
interface and unit.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check the communication wiring between the user interface and the unit PCB.
See "3.21 User interface" [
Possible cause: Faulty wiring between the user interface and the unit PCB.
2 Check if the unit user interface functions correctly. See
4
interface" [ 266].
Possible cause: Faulty user interface on unit.
3 Perform a check of the hydro PCB. See
Possible cause: Faulty hydro PCB.
4 Check if the power supply is conform with the regulations. See
4
circuit" [ 284].
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance >4%),
▪ Power drop,
▪ Short circuit.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
Communication
abnormality between unit
and wireless gateway.
Effect
Unit will NOT stop
operating.
4
266].
"3.12 Hydro
Effect
Unit will NOT stop
operating.
Reset
Automatic reset.
"3.21 User
4
PCB" [ 160].
"4.1 Electrical
Reset
Automatic reset.
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03