Daikin VRV 5 RXYA8A7Y1B, Installer And User Manual

Page: 183 / 200

25 | Troubleshooting
Installer and user reference guide
183
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P749918-1 – 2023.12
Main
code
Sub code Cause Solution SVEO
(a)
SVS
(b)
Master Slave 1
Indoor unit communication error Check user interface connection.
, Malfunction code: faulty wiring to
Q1/Q2 Check Q1/Q2wiring.
Too many indoor units are
connected to F1/F2 line Check indoor unit amount and total
capacity connected.
Warning because there is an error
on another unit (indoor/SV unit) Check if other indoor units/SV units
have a malfunction and confirm if
indoor unit mix is allowed.
Connection malfunction over
indoor units or type mismatch Check if other indoor units have a
malfunction and confirm if indoor
unit mix is allowed.
Connection malfunction over
indoor units or type mismatch Check if other indoor units have a
malfunction and confirm if indoor
unit mix is allowed.
Wrong unit combination (multi
system) Check if unit types are compatible.
Wrong outdoor unit connected Disconnect the outdoor unit.
No SV unit connected Connect a SV unit.
Wrong SV unit connected Disconnect the SV unit.
SV unit refrigerant type abnormality Check SV unit refrigerant type
SV unit DIP switch abnormality Check the DIP switches of the SV
unit.
Mismatch between wiring path and
piping path during test run Mistake detected during SV unit
and indoor unit connection check
(see
"22.7 To perform a SV/indoor
unit connection check" [
4
168]).
Confirm wiring between indoors
and SV units.
Refer to SV unit manual for correct
way of wiring.
Auto address malfunction
(inconsistency) Check if interconnected unit
amount matches with powered unit
amount (by monitor mode) or wait
until initialisation is finished.
Maintenance warning (ventilation
fan) SV unit ventilation needs
maintenance check. Refer to the SV
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 18~29°C for leak detection
operation. Retry when ambient conditions are
satisfied.