Daikin VRV IV+ RXYTQ8U5YF, Installer And User Manual

Page: 132 / 144

23 | Troubleshooting
Installer and user reference guide
132
RXYTQ
VRV IV+ heat pump for high ambient temperatures
4P561157-1B – 2021.11
Main code Sub code Cause Solution
Master Slave 1 Slave 2
Auto address malfunction
(inconsistency) Check if transmission wired
unit amount matches with
powered unit amount (by
monitor mode) or wait till
initialisation is finished.
Stop valve closed or wrong
(during system test run) Open stop valves.
Auto charging related
— 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.