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Troubleshooting
Installer and user reference guide
162
REMA5+REYA8~20A7Y1B
VRV 5 heat recovery
4P687640-1 – 2022.07
Main
code
Sub code
Cause
Solution
SVEO
(a)
SVS
(b)
Master Slave 1
R32 sensor malfunction in one of
the indoor units
(c)
Check connection on PCB or
actuator.
The system will continue
operation, but indoor unit in
scope will stop operating. Refer to
the service manual for more
information.
R32 sensor end of lifetime in one
of the indoor units
(c)
One of the sensors is at the end of
lifetime and must be replaced.
Refer to the service manual for
more information.
R32 sensor malfunction in one of
the BS units
Check connection on PCB or
actuator.
The system will continue
operation, but BS unit in scope will
stop operating. Refer to the
service manual for more
information.
R32 sensor end of
lifetime<6 months in one of the BS
units
One of the sensors is at the end of
lifetime (for CH-22: almost) and
must be replaced.
Refer to the service manual for
more information.
R32 sensor end of lifetime in one
of the BS units
Earth leakage detector activated
Restart the unit. If the problem
reoccurs, contact your dealer.
Earth leakage detector
malfunction: open circuit) - A1P
(X101A)
Check connection on PCB or
actuator.
High pressure switch was
activated (S1PH) – main PCB (X2A)
Check stop valve situation or
abnormalities in (field) piping or
airflow over air cooled coil.
▪
Refrigerant overcharge
▪
Stop valve closed
▪
Check
refrigerant
amount
+recharge unit.
▪
Open stop valves
Stop valve closed (liquid)
Open liquid stop valve.
▪
Refrigerant overcharge
▪
Stop valve closed
▪
Check
refrigerant
amount
+recharge unit.
▪
Open stop valves.
Low pressure malfunction:
▪
Stop valve closed
▪
Refrigerant shortage
▪
Indoor unit malfunction
▪
Open stop valves.
▪
Check
refrigerant
amount
+recharge unit.
▪
Check the user interface's
display or transmission wiring
between the outdoor unit and
the indoor unit.
