Troubleshooting; Solving Problems Based On Error Codes; Error Codes: Overview - Daikin LRYEN-AY1 Installation And Operation Manual

18

Troubleshooting

18.1 Solving problems based on error
codes
18.1.1

Error codes: Overview

In case other error codes appear, contact your dealer.
Main code LRYEN10*
O
O
O
O
O
O
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1B – 2020.08
LRNUN5* Cause
O Electrical leakage
— The stop valves are closed
O Malfunction of fan motor
For LRYEN10*:
▪ (M1F) - A9P (X1A)
▪ (M2F) - A10P (X1A)
▪ (M3F) - A11P (X1A)
For LRNUN5*:
▪ (M1F) - A4P (X1A)
O Malfunction of electronic expansion valve coil
For LRYEN10*:
▪ (Y7E) - A12P (X8A)
▪ (Y4E) - A12P (X9A)
▪ (Y14E) - A12P (X10A)
▪ (Y3E) - A1P (X21A)
▪ (Y8E) - A1P (X22A)
▪ (Y2E) - A1P (X23A)
▪ (Y1E) - A1P (X25A)
▪ (Y13E) - A1P (X26A)
▪ (Y5E) - A2P (X21A)
▪ (Y16E) - A2P (X22A)
▪ (Y17E) - A2P (X23A)
For LRNUN5*:
▪ (Y3E) - A1P (X21A)
▪ (Y1E) - A1P (X22A)
▪ (Y4E) - A1P (X23A)
▪ (Y2E) - A1P (X24A)
— Wrong selection of cooling load (including the
expansion valves)
O Malfunction of ambient temperature sensor
For LRYEN10* and LRNUN5*:
▪ (R1T) - A1P (X18A)
If the unit runs into a problem, the user interface displays an error
code. It is important to understand the problem and to take
measures before resetting an error code. This should be done by a
licensed installer or by your local dealer.
This chapter gives you an overview of all possible error codes and
their descriptions as they appear on the user interface.
For detailed troubleshooting of each error, see the service manual.
Solution
Correct the field wiring and connect ground
wiring.
Open the stop valve on both the gas and
liquid side.
Check connection on PCB or actuator.
Check connection on PCB or actuator.
Reselect the cooling load, including the
expansion valve.
Check connection on PCB or actuator.
18 Troubleshooting
Installation and operation manual
37