Daikin Emura 3 Series Service Manual page 34

3 | Troubleshooting
3.5.29 P4-00 – Outdoor unit: Malfunction of radiating fin temperature sensor
3.5.30 U0-00 – Outdoor unit: Shortage of refrigerant
Service manual
34
draft – 22/04/2022 08:50
Possible cause:
▪ Faulty or disturbance of the power supply (power supply MUST be within
range of nominal operating voltage ±4%),
▪ Power drop,
▪ Short circuit.
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
8 Wait until the rectifier voltage is below 10 V DC.
DANGER: RISK OF ELECTROCUTION
Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure
the rectifier voltage is below 10 V DC before proceeding.
9 Check that the thermal interface grease is applied properly on the (PCB or
refrigerant piping) contact surface of the heat sink. Adjust if needed.
Possible cause: Thermal interface grease NOT applied properly on the heat
sink.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
Radiating fin thermistor
input is out of range.
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 Main PCB.
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
Refrigerant shortage
detected.
Effect
Unit will stop operating.
Effect
Unit will stop operating.
Reset
Manual reset via user
interface.
Reset
Automatic reset.
Power reset via outdoor
unit.
RXJ20~50A + FTXJ-A(W)(S)(B)
Split Emura 3 R32
ESIE22-04 – 2022.04