Daikin VRV 5-S Series Installation And Operation Manual page 41

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 iTM (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 the operation, unit will go in locked state. 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.
a
i
b b
h
g c c
d j d
f
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 iTM (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. The unit
number is displayed on 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.
After refrigerant recovery operation, an error code is displayed and
the unit is in locked state. Service is needed to repair the leak and
activate the system. Refer to the service manual for more
information.
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 "15.4 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
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600329-1A – 2020.01
b
c
k e k
l
outputs" [ 4 33].
Note: iTM and WAGO module can also be connected to generate an
output signal in case of leak detection. E.g. it can be used at a
supervised location. Please refer to installation manual of the iTM for
further details.
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 of the R32
refrigerant leakage sensor.
19 Troubleshooting
hair spray, paint) in high
Installation and operation manual
41