Refrigerant Leak Detection System; 23 Disposal - Daikin VRV 5 RXYA8A7Y1B Installation And Operation Manual

23 Disposal

22.2

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
the installer menu.
a
b
h
d
d
e
e
a Heat pump outdoor unit
b SV unit
c Refrigerant piping
d VRV direct expansion (DX) indoor unit
e Remote controller in normal mode
f Remote controller in alarm only mode
g Remote controller in supervisor mode (mandatory in
some situations)
h 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
1 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 SV unit will close the shut-off valves of the
corresponding branch pipe in order to reduce the amount of
refrigerant in the indoor system.
▪ After the operation, the indoor units of the port where the leak
was detected will be out of operation and display an error. The
rest of the system will continue operation.
2 If the R32 sensor in the indoor unit without a SV unit (directly
connected to the outdoor unit) detects a refrigerant leak:
▪ All shut off valves in SV units connected to other indoor units
will be closed, the compressor will be shut down and the
system cannot operate anymore.
3 If the R32 sensor in the SV unit detects a refrigerant leak:
▪ The SV unit will close all of its shut-off valves and triggers the
ventilation system (if equipped) of the SV unit to evacuate the
leaking refrigerant.
▪ After the operation, the system will go in locked state and the
remote controllers will display an error. Service is needed to
repair the leak and activate the system. Refer to the service
manual for more information.
Feedback of the remote controller after leak detection operation will
depend on its mode.
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.
Installation and operation manual
58
button to open
c c c
d d
e f
g
a
i
b
g
d
d
e
e k
a Heat pump outdoor unit
b SV unit
c Refrigerant piping
d VRV direct expansion (DX) indoor unit
e Remote controller in normal mode and 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 'U9–01' 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 "17.9 To connect the external
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,
concentrations, in the close proximity of the indoor unit
because this may cause misdetection by the R32
refrigerant leakage sensor.
23 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.
c c c
h
d d
j e k e
f
l
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RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P739915-1 – 2023.12
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