U2-00 - Main Circuit Voltage Abnormality; U4-00 - Indoor/Outdoor Transmission Abnormality; U5-00 - Transmission Malfunction Between Indoor Unit And Remote Controller; Indoor/Outdoor Combination Abnormality - Daikin Stylish Series Service Manual

1.5.31 U2-00 – Main circuit voltage abnormality
Trigger Effect
Power supply Unit will stop
abnormality or instant operating.
power failure is
detected.
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 52.
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance
>10%),
▪ Power drop,
▪ Short circuit.
2 Perform a check of the compressor. See
page 20.
Possible cause: Faulty compressor.
3 Perform a check of the outdoor unit fan motor. See
"2.12 Outdoor unit fan motor" on
Possible cause: Faulty outdoor unit fan motor.
4 Perform a check of the main PCB. See
page 35.
Possible cause: Faulty main PCB.
5 Perform a check of the indoor unit PCB. See
PCB" on page 30.
Possible cause: Faulty indoor unit PCB.
6 Wait until the compressor restarts.
Possible cause:
▪ Momentary drop of voltage,
▪ Momentary power failure.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.5.32 U4-00 – Indoor/outdoor transmission
abnormality
Trigger Effect
Communication Unit will stop
failure between operating.
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.
(C)(F)TXA15~50A2V1B(W)(S)(T) + RXA42+50A2V1B +
RXA20~35A2V1B
Split Stylish R32
ESIE18-03 – 2018.09
Reset
Power reset via
outdoor unit.
"2.2 Compressor" on
1.5.33
page 38.
"2.11 Main PCB" on
"2.8 Indoor unit
To solve the error code
Reset
Power reset via
outdoor unit.
1.5.34
1 Check if the power supply is conform with the regulations. See
"3.1 Power supply" on page 52.
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 and the indoor unit. See
supply" on page 52.
Possible cause: Faulty wiring between the outdoor unit and
the indoor unit.
3 Perform a check of the main PCB. See
page 35.
Possible cause: Faulty main PCB.
4 Perform a check of the outdoor unit fan motor. See
"2.12 Outdoor unit fan motor" on page 38.
Possible cause: Faulty outdoor unit fan motor.
5 Perform a check of the indoor unit PCB. See
PCB" on page 30.
Possible cause: Faulty indoor unit PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
U5-00 – Transmission malfunction
between indoor unit and remote controller
Trigger Effect
Communication Unit will stop
failure between operating.
indoor unit and user
interface.
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Check for improper combination of the indoor unit and the
remote controller. See Business Portal for more information.
2 Check the wiring between the indoor unit and remote controller.
See "3.1 Power supply" on page 52.
Possible cause: Faulty wiring between the indoor unit and
remote controller.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
UA-00 – Indoor/outdoor combination
abnormality
Trigger Effect
Signal transmission Unit will stop
between outdoor and operating.
indoor unit
abnormality. Improper
combination of
outdoor and indoor
unit.
1 Troubleshooting
"3.1 Power
"2.11 Main PCB" on
"2.8 Indoor unit
Reset
Automatic reset.
Reset
Power reset via
outdoor unit.
Service manual
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