21 Disposal
Installation and operation manual
41
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600329-1E – 2023.02
Main code
Cause
Solution
SVEO
(a)
SVS
(b)
▪ The stop valve of an outdoor unit is left closed.
▪ The piping and wiring of the specified indoor
unit are not connected correctly to the outdoor
unit.
▪ Open the stop valve on both the gas and liquid side.
▪ Confirm that the piping and wiring of the specified
indoor unit are connected correctly to the outdoor unit.
(a)
The SVEO terminal provides an electrical contact that closes in case the indicated error occurs.
(b)
The SVS terminal provides an electrical contact that closes in case the indicated error occurs.
(c)
The error code is only shown on the user interface of the indoor unit where the error occurs.
20.2
Refrigerant leak detection system
Normal operation
During normal operation, the alarm only and supervisor remote
controller have no functionality. The screen of the remote controller
in alarm only and supervisor mode will be off. Operation of the
remote controller can be checked by pushing the
button to open
the installer menu.
b
a
c
d
e
c
b
b
c
d
f
g
a
Heat pump outdoor unit
b
Refrigerant piping
c
VRV direct expansion (DX) indoor unit
d
Remote controller in normal mode
e
Remote controller in alarm only mode
f
Remote controller in supervisor mode (mandatory in
some situations)
g
Centralised controller (optional)
Note:
During start-up of the system, the mode of the remote control
can be verified from the screen.
Leak detection operation
If the R32 sensor in the indoor unit detects a refrigerant leak, the
user will be warned by both audible and visible signals of the remote
controller of the leaking indoor unit (and the supervisor remote
controller, if applicable). At the same time the outdoor unit will start
refrigerant recovery operation in order to reduce the amount of
refrigerant in the indoor system.
After refrigerant recovery operation, an error code is displayed and
the unit is in locked state. Feedback of the remote controller after
leak detection operation will depend on its mode.
Service is needed to repair the leak and activate the system. Refer
to the service manual for more information.
WARNING
The unit is equipped with a refrigerant leak detection
system for safety.
To be effective, the unit MUST be electrically powered at
all times after installation, except for maintenance.
b
h
a
c
d
e
c
b
b
c
d
f
j
k
l
k
i
g
a
Heat pump outdoor unit
b
Refrigerant piping
c
VRV direct expansion (DX) indoor unit
d
Remote controller in normal mode
e
Remote controller in alarm only mode
f
Remote controller in supervisor mode (mandatory in
some situations)
g
Centralised controller (optional)
h
Refrigerant leak
i
Outdoor unit error code on 7‑segment display
j
Error code 'A0–11' and audible alarm and red warning
signal is generated from this remote controller.
k
Error code 'U9–02' is displayed on this remote controller.
No alarm or warning lights.
l
Error code 'A0–11' and audible alarm and red warning
signal is generated from this
supervisor
remote
controller. The unit
address
is displayed on this remote
controller.
Note:
It is possible to stop the leak detection alarm from the remote
controller and from the app. To stop the alarm from the remote
controller, press
for 3 seconds.
Note:
Leak detection will trigger SVS output. For more information,
see
"16.4 To connect the external outputs"
32].
Note:
An optional output PCB for the indoor unit can be added to
provide output for external device. The output PCB will trigger in
case a leak is detected. For exact model name see option list of the
indoor unit. For more information about this option, refer to the
installation manual of the optional output PCB
Note:
Some centralised controllers can also be used as supervisor
remote controller. For further details on installation, please refer to
the installation manual of the centralised controllers.
NOTICE
The R32 refrigerant leakage sensor is a semiconductor
detector which may incorrectly detect substances other
than R32 refrigerant. Avoid using chemical substances
(e.g. organic solvents, hair spray, paint) in high
concentrations, in the close proximity of the indoor unit
because this may cause misdetection by the R32
refrigerant leakage sensor.
21
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.
