Daikin VRV 5-S Series - Refrigerant Leak Detection System

26 | Troubleshooting
Installer and user reference guide
150
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1D – 2023.02
Main
code
Cause Solution SVEO
(a)
SVS
(b)
Insufficient supply voltage Check if the supply voltage is supplied
properly.
Malfunction code: System test run not
yet executed (system operation not
possible)
Execute system test run.
No power is supplied to the outdoor
unit.
Check if the power wiring for the outdoor
unit is connected correctly.
▪ System mismatch. Wrong type of
indoor units combined (R410A,
R407C, RA, etc)
▪ Indoor unit malfunction
Check if other indoor units have malfunction
and confirm indoor unit mix is allowed.
Improper type of indoor units are
connected.
Check the type of indoor units that are
currently connected. If they are not proper,
replace them with proper ones.
Incorrect interconnections between
units.
Connect interconnections F1 and F2 of the
connected BP unit correctly to the outdoor
unit's PCB (TO BP UNIT). Make sure that the
communication with the BP unit is enabled.
▪ 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.
26.4 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