25
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Troubleshooting
Installer and user reference guide
167
REMA5+REYA8~20A7Y1B
VRV 5 heat recovery
4P687640-1 – 2022.07
Main
code
Sub code
Cause
Solution
SVEO
(a)
SVS
(b)
Master Slave 1
Auto address malfunction
(inconsistency)
Check if transmission wired unit
amount matches with powered
unit amount (by monitor mode) or
wait till initialisation is finished.
Maintenance warning (ventilation
fan)
BS unit ventilation needs
maintenance check. Refer to the
BS unit manual for more
information.
Leak detection function related error codes
—
Unit is not prepared to execute
leak detection operation
Refer to requirements to be able
to execute leak detection
operation.
—
Indoor unit is out of temperature
range 20~32°C for leak detection
operation.
Retry when ambient conditions
are satisfied.
—
Outdoor unit is out of
temperature range 4~43°C for
leak detection operation.
Retry when ambient conditions
are satisfied.
—
Too low pressure was noticed
during leak detection operation
Restart leak detection operation.
—
Indicates an indoor unit which is
not compatible with leak
detection functionality is installed
Use VRV R32 compatible indoor
units, see engineering databook
for unit selection.
(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.
25.4 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.
c
a
d
e
f
d
c
c
d
e
g
h
b
a
Heat recovery outdoor unit
b
Branch selector (BS)
c
Refrigerant piping
d
VRV direct expansion (DX) indoor unit
e
Remote controller in normal mode
