Daikin VRV 5 REYA8A7Y1B Installer And User Manual page 162

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