Daikin Altherma EBLQ011CA3V3 - U0-00 - Shortage of Refrigerant; U3-00 - under Floor Heating Screed Dry out Stop; U4-00 - Indoor;Outdoor Transmission Abnormality; U5-00 - Remote Control Transmission Defect

1 Troubleshooting
Service manual
20
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
Possible cause: Faulty power module = inverter PCB.
2 Perform a check of the main PCB. See "2.17 Main PCB" on
page66.
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.4.54 U0-00 – Shortage of refrigerant
Trigger Effect Reset
Refrigerant shortage
detected.
Unit will stop
operating.
Automatic reset.
Power reset via
outdoor unit.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of all refrigerant thermistors. See
"2.23Thermistors"on page82.
Possible cause: Faulty refrigerant thermistor(s).
2 Perform a check of the refrigerant circuit. See "3.2Refrigerant
circuit"on page92.
Possible cause:
▪ Stop valve is closed,
▪ Clogged refrigerant circuit,
▪ Refrigerant circuit NOT charged correctly,
▪ Humidity in the refrigerant circuit,
▪ Non-condensables in the refrigerant circuit,
▪ Leaking refrigerant circuit.
3 Perform a check of the compressor. See "2.8 Compressor" on
page50.
Possible cause: Faulty compressor.
4 Perform a check of the expansion valve. See "2.11Expansion
valve"on page54.
Possible cause: Faulty expansion valve.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.4.55 U3-00 – Under floor heating screed dry
out stop
Trigger Effect Reset
Under floor heating
screed dry-out is
interrupted.
Unit will stop
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 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.
1.4.56 U4-00 – Indoor/outdoor transmission
abnormality
Trigger Effect Reset
Communication
failure between
outdoor and indoor
unit.
Unit will stop
operating.
Power reset via
outdoor 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 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.
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 page91.
Possible cause: Faulty wiring between the outdoor unit,
indoor unit and domestic hot water tank.
3 Perform a check of the main PCB. See "2.17 Main PCB" on
page66.
Possible cause: Faulty main PCB.
4 Perform a check of the outdoor unit fan motor. See
"2.18Outdoor unit fan motor"on page73.
Possible cause: Faulty outdoor unit fan motor.
5 Perform a check of the hydro PCB. See "2.14 Hydro PCB"on
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.
1.4.57 U5-00 – Remote control transmission
defect
Trigger Effect Reset
Communication
failure between
indoor unit and user
interface.
Unit will stop
operating.
Automatic reset.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of the hydro PCB. See "2.14 Hydro PCB"on
page58.