Daikin LRYEN-AY1 Installation And Operation Manual page 39

Main code LRYEN10*
O
O
O
O
O
O
O
O
O
O
O
NOTICE
After turning ON the operation switch, wait at least 1
minute before switching off the power supply. Electrical
leakage detection is
compressor starts. Switching off the power supply during
this check will result in an incorrect detection.
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1B – 2020.08
LRNUN5* Cause
O ▪ Heat exchanger of outdoor unit is blocked.
▪ The outdoor temperature is above the
maximum operating temperature.
O Supply voltage dropped
Transmission outdoor unit – inverter: INV1/
FAN1 transmission trouble
O Unbalanced power supply voltage
O Lost phase in power supply
O Insufficient supply voltage
— Communication error to indoor unit
— Communication error to indoor unit
— Wrong combination of indoor units
— Replaced all air conditioner indoor units after
confirmed communication
— Added any air conditioner indoor units after
confirmed communication
performed shortly after the
18 Troubleshooting
Solution
▪ Check if any obstacles block the heat
exchanger and remove them.
▪ Operate the unit only
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).
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.
Check the communication cable and conduct
operation after all communication cables are
corrected.
If an air conditioner indoor unit is installed:
▪ If you have changed the power supply
cable or communication cable: turn the
outdoor unit operation switch OFF but
keep power supply ON.
▪ Then push BS3 on the A1P PCB for
more than 5 seconds.
Installation and operation manual
within the
39