Daikin CO2 Conveni-pack LRYEN10A7Y1 Installer And User Reference Manual page 126

24 | Troubleshooting
Main code LRYEN10* LRNUN5* Cause
O
O
O
O
O
O
O
O
—
O
O
Installer and user reference guide
126
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
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 if any obstacles block the
heat exchanger and remove them.
temperature is ▪ 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
4P605460-1 – 2020.08