U7-00 - Transmission Abnormality Between Outdoor Main Microcomputer - Sub Microcomputer; U8-01 - Lost Lan Adapter Connection; Indoor/Outdoor Combination Abnormality; Extension/Hydro Communication Problem - Daikin Altherma EBLQ011CAV3 Service Manual

Possible cause: Faulty hydro PCB.
2 Check if the user interface functions correctly. See
interface" on page 87.
Possible cause: Faulty user interface.
3 Check if the power supply is conform with the regulations. See
"3.1 Power supply" on page 91.
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance
>10%),
▪ Power drop,
▪ Short circuit.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.4.58 U7-00 – Transmission abnormality
between outdoor main microcomputer -
sub microcomputer
Trigger Effect
Communication Unit will stop
abnormality between operating.
outdoor unit and
outdoor unit.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of the main PCB. See
page 66.
Possible cause: Faulty main PCB.
2 Perform a check of the inverter PCB. See
PCB" on page 61.
Possible cause: Faulty power module = inverter PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.4.59 U8-01 – Lost LAN adapter connection
Trigger Effect
Communication Unit will NOT stop
abnormality between operating.
indoor unit and LAN
adapter.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of
"3.4 Manuafacturer components" on
Possible cause: Faulty wiring of the LAN adapter.
2 Perform a check of the LAN adapter PCB. See
adapter PCB" on page 66.
Possible cause: Faulty LAN adapter PCB.
3 Perform a check of the hydro PCB. See
page 58.
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
"2.24 User
Reset
Manual reset via user
interface.
"2.17 Main PCB" on
"2.15 Inverter
Reset
Automatic reset.
the LAN adapter wiring.
page 98.
"2.16 LAN
"2.14 Hydro PCB" on
Possible cause: Faulty hydro PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.4.60 UA-00 – Indoor/outdoor combination
abnormality
Trigger
Signal transmission
between outdoor and
indoor unit
abnormality. Improper
combination of
outdoor and indoor
unit.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
INFORMATION
In case of preferential kWh rate, the indoor unit also needs
a power reset.
1 Check for improper combination of the indoor unit and the
outdoor unit. See the combination table in the Databook for
more information.
2 Perform a check of the power supply, connections, wiring,...
between the outdoor unit, indoor unit and domestic hot water
tank. See "3.1 Power supply" on
Possible cause: Faulty wiring between the outdoor unit,
indoor unit and domestic hot water tank.
3 Perform a check of the main PCB. See
page 66.
Possible cause: Faulty main PCB.
4 Perform a check of the hydro PCB. See
page 58.
Possible cause: Faulty hydro PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.4.61 UA-16 – Extension/hydro communication
problem
Trigger
Communication
abnormality between
hydro PCB and
extension PCB.
To solve the error code
See
INFORMATION
It is recommended to perform the checks in the listed
order.
INFORMATION
In case of preferential kWh rate, the indoor unit also needs
a power reset.
1 Check the wiring between the hydro PCB and the extension
PCB. See "3.1 Power supply" on
1 Troubleshooting
Effect Reset
Unit will stop Power reset via
operating. outdoor unit.
page 91.
"2.17 Main PCB" on
"2.14 Hydro PCB" on
Effect Reset
Unit will not stop Manual reset via user
operating. interface.
page 91.
Service manual
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