Daikin LRYEN10A7Y1 Installation And Operation Manual page 46

18 Troubleshooting
Main code LRYEN10*
O
O
O
O
O
O
O
O
O
O
—
O
O
Installation and operation manual
46
LRNUN5* Cause
O Malfunction of the economizer outlet
temperature thermistor
For LRYEN10*:
▪ (R8T) – A1P (X30A)
For LRNUN5*:
▪ (R6T) – A1P (X35A)
O Malfunction of the liquid (after sub-cool)
temperature thermistor
For LRYEN10*:
▪ (R7T) – A1P (X30A)
For LRNUN5*:
▪ (R7T) – A1P (X35A)
▪ (R5T) – A1P (X35A)
O Malfunction of high pressure sensor
For LRYEN10*:
▪ (S1NPH) – A2P (X31A)
For LRNUN5*:
▪ (S1NPH) – A1P (X31A)
O Malfunction of low pressure sensor
For LRYEN10*:
▪ (S1NPL) – A1P (X31A)
▪ (S2NPL) – A1P (X32A)
▪ (S1NPM) – A12P (X31A)
▪ (S2NPM) – A2P (X32A)
For LRNUN5*:
▪ (S1NPL) – A1P (X32A)
▪ (S2NPM) – A6P (X31A)
O ▪ Heat exchanger of outdoor unit is blocked.
▪ The outdoor temperature is above the
maximum operating temperature.
O Supply voltage dropped.
O Transmission outdoor unit – inverter: INV1/
FAN1 transmission trouble
O Unbalanced power supply voltage
O Lost phase in power supply
O Insufficient supply voltage
O Communication error to outdoor unit or indoor
unit
— Communication error to indoor unit or
capacity up unit
— Wrong combination of outdoor unit with
indoor units
Solution
Check connection on PCB or actuator
Check connection on PCB or actuator.
Check connection on PCB or actuator.
Check connection on PCB or actuator.
▪ Check if any obstacles block the heat
exchanger and remove them.
▪ Operate the unit only within the temperature
operation range.
▪ Check the power supply.
▪ Check the wiring size and length of the
power supply. They must be according to the
specifications.
Check connection.
Check the power supply.
Check the connection of the power supply
cable.
Check the power supply.
Check the connection of the communication
cables upstream of indoor units (error
displayed on remote controller) or outdoor unit.
Check the connection of the communication
cables downstream of indoor units (error
displayed on remote controller).
▪ Check the number of connected indoor units.
▪ Check if an indoor unit is installed that is not
a possible combination.
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1D – 2023.08