Daikin VRV IV+ RYYQ8U7Y1B Series Installer And User Manual page 160

23 | Troubleshooting
Main code
Master
Auto charging related
Leak detection function related
Installer and user reference guide
160
Sub code
Slave 1 Slave 2
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Cause
Auto address malfunction
(inconsistency)
Stop valve closed or wrong
(during system test run)
Unusual low pressure on
suction line
Freeze-up prevention indoor
unit
Automatic charging nearly
finished
Automatic charging finished
Unit is not prepared to
execute leak detection
operation
Indoor unit is out of
temperature range for leak
detection operation
Outdoor unit is out of
temperature range for leak
detection operation
Too low pressure was noticed
during leak detection
operation
Indicates an indoor unit which
is not compatible with leak
detection functionality is
installed (e.g., RA DX indoor
unit, Hydrobox, ...)
Solution
Check if transmission wired
unit amount matches with
powered unit amount (by
monitor mode) or wait till
initialisation is finished.
Open stop valves.
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
opened.
▪ Check if the air inlet and
outlet of the indoor unit are
not obstructed.
Close valve A immediately.
Push BS1 to reset. Retry
autocharge procedure.
Prepare for autocharge
stopping.
Finish autocharge mode.
Refer to requirements to be
able to execute leak detection
operation.
Retry when ambient
conditions are satisfied.
Retry when ambient
conditions are satisfied.
Restart leak detection
operation.
Refer to requirements to be
able to execute leak detection
operation.
RYYQ+RYMQ+RXYQ
VRV IV+ heat pump
4P546228-1C – 2021.11
is