Refrigerant Leak Detection System - Daikin VRV 5 S Series Installer And User Manual

26 | Troubleshooting
Main
code
Insufficient supply voltage
Malfunction code: System test run not
yet executed (system operation not
possible)
No power is supplied to the outdoor
unit.
▪ System mismatch. Wrong type of
indoor units combined (R410A,
R407C, RA, etc)
▪ Indoor unit malfunction
Improper type of indoor units are
connected.
Incorrect interconnections between
units.
▪ The stop valve of an outdoor unit is
left closed.
▪ The piping and wiring of the
specified
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

Installer and user reference guide
150
Cause
indoor unit are not
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.
a
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
Solution
Check if the supply voltage is supplied
properly.
Execute system test run.
Check if the power wiring for the outdoor
unit is connected correctly.
Check if other indoor units have malfunction
and confirm indoor unit mix is allowed.
Check the type of indoor units that are
currently connected. If they are not proper,
replace them with proper ones.
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.
▪ 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.
b b b
c c
d e
f
(a) (b)
SVEO SVS
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1D – 2023.02