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 - Daikin Altherma EBLQ011CAV3 Service Manual

1 Troubleshooting
Possible cause: Faulty power module = inverter PCB.
2 Perform a check of the main PCB. See
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
Refrigerant shortage Unit will stop
detected. operating.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of
"2.23 Thermistors" on page 82.
Possible cause: Faulty refrigerant thermistor(s).
2 Perform a check of the refrigerant circuit. See
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
page 50.
Possible cause: Faulty compressor.
4 Perform a check of the expansion valve. See
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
Under floor heating Unit will stop
screed dry-out is operating.
interrupted.
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.
Service manual
20
"2.17 Main PCB" on
Reset
Automatic reset.
Power reset via
outdoor unit.
all refrigerant thermistors.
"3.2 Refrigerant
"2.8 Compressor" on
"2.11 Expansion
Reset
Manual reset via user
interface.
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
Communication
failure between
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.
See
1 Check if the power supply is conform with the regulations. See
"3.1 Power supply" on
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
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 outdoor unit fan motor. See
"2.18 Outdoor unit fan motor" on
Possible cause: Faulty outdoor unit fan motor.
5 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.
1.4.57 U5-00 – Remote control transmission
defect
Trigger
Communication
failure between
indoor unit and user
interface.
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
page 58.
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
Effect Reset
Unit will stop Power reset via
operating. outdoor unit.
page 91.
page 91.
"2.17 Main PCB" on
page 73.
"2.14 Hydro PCB" on
Effect Reset
Unit will stop Automatic reset.
operating.
"2.14 Hydro PCB" on
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02