Refrigerant Leak Detection System - Daikin RXYSA4A7V1B Installer And User Manual

26.4 Refrigerant leak detection system

RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1A – 2020.07
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 cownntroller can be checked by pushing
the button to open the installer menu.
a
b
g c
d
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
h
g c
d j
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.
b b
c c
d e
f
b b
c c
d k e k
f
l
26 Troubleshooting
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