Daikin VRV IV - Page 147

24 | Troubleshooting
Installer and user reference guide
147
RXMLQ8 + RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543427-1A – 2020.10
Main code Sub code Cause Solution
Master Slave 1 Slave 2
— Unusual low pressure on
suction line
Close valve A immediately.
Push BS1 to reset. Check
following items before
retrying autocharge
procedure:
▪ Check if the gas side stop
valve is opened correctly.
▪ Check if the valve of the
refrigerant cylinder is
opened.
▪ Check if the air inlet and
outlet of the indoor unit are
not obstructed.
— Freeze-up prevention indoor
unit
Close valve A immediately.
Push BS1 to reset. Retry
autocharge procedure.
— Automatic charging nearly
finished
Prepare for autocharge
stopping.
— Automatic charging finished Finish autocharge mode.
Leak detection function related
— Unit is not prepared to
execute leak detection
operation
Refer to requirements to be
able to execute leak detection
operation.
— Indoor unit is out of
temperature range for leak
detection operation
Retry when ambient
conditions are satisfied.
— Outdoor unit is out of
temperature range for leak
detection operation
Retry when ambient
conditions are satisfied.
— Too low pressure was noticed
during leak detection
operation
Restart leak detection
operation.
— Indicates an indoor unit which
is not compatible with leak
detection functionality is
installed (e.g., RADX indoor
unit, Hydrobox, …)
Refer to requirements to be
able to execute leak detection
operation.