Extension Pcb / Hydro Pcb Mismatch Error - Daikin Altherma EBLQ011CAV3 Service Manual

1 Troubleshooting
Possible cause: Faulty wiring between the hydro PCB and
extension PCB.
2 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.
3 Perform a check of the hydro PCB. See
page 58.
Possible cause: Faulty hydro PCB.
4 Perform an electrical check of the extension PCB. See
"2.12 Extension PCB" on page 56.
Possible cause: Faulty extension PCB.
5 Perform a check of the current loop PCB. See
loop PCB" on page 53.
Possible cause: Faulty current loop PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.4.62 UA-21 – Extension PCB / hydro PCB
mismatch error
Trigger Effect
Communication Unit will stop
abnormality between operating.
hydro PCB and
extension PCB after
communication was
already made.
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 the wiring between the hydro PCB and the extension
PCB. See "3.1 Power supply" on
Possible cause: Faulty wiring between the hydro PCB and
extension PCB.
2 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.
3 Perform a check of the hydro PCB. See
page 58.
Possible cause: Faulty hydro PCB.
4 Perform an electrical check of the extension PCB. See
"2.12 Extension PCB" on page 56.
Possible cause: Faulty extension PCB.
5 Check for applicable ESV.
Service manual
22
"2.14 Hydro PCB" on
"2.10 Current
Reset
Power reset via
outdoor unit.
page 91.
"2.14 Hydro PCB" on
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02