21 Troubleshooting
Installation and operation manual
49
REMA5+REYA8~20A7Y1B
VRV 5 heat recovery
4P684060-1 – 2022.02
Example:
Code
Example
Main code
Sub code
With an interval of 1 second, the display will switch between main
code and sub code.
INFORMATION
See the service manual for:
▪ The complete list of error codes
▪ A more detailed troubleshooting guideline for each
error
21.1.1
Error codes: Overview
In case other error codes appear, contact your dealer.
Main
code
Sub code
Cause
Solution
SVEO
(a)
SVS
(b)
Master
Slave 1
The R32 sensor in one of the indoor units
has detected a refrigerant leak
(c)
Possible R32 leak. The BS unit will close
the shut-off valves of the branch pipe port to
which the corresponding indoor unit is
connected. Indoor units on this branch pipe
port will be out of operation until the leak is
repaired. Refer to service manual for more
information.
The R32 sensor in one of the BS unit has
detected a refrigerant leak.
Possible R32 leak. The BS unit will close all
of its shut-off valves and triggers the
ventilation system of the BS unit. The
system goes in locked status. Service is
needed to repair the leak and activate the
system. Refer to the service manual for
more information.
/
Safety system error (leak detection)
(c)
An error related to the safety system
occurred.
Refer to the service manual for more
information.
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
(for CH-05: almost) and must be replaced.
Refer to the service manual for more
information.
R32 sensor end of lifetime<6 months in one
of the indoor units
(c)
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 recharge unit.
▪ Open stop valves
Stop valve closed (liquid)
Open liquid stop valve.
▪ Refrigerant overcharge
▪ Stop valve closed
▪ Check refrigerant recharge unit.
▪ Open stop valves.
