11 Disposal
Installer and user reference guide
53
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1 – 2018.09
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.
11
Disposal
NOTICE
Do NOT try to dismantle the system yourself: dismantling
of the system, treatment of the refrigerant, oil and other
parts MUST comply with applicable legislation. Units
MUST be treated at a specialised treatment facility for
reuse, recycling and recovery.
