Daikin VRV 5 RXYA8A7Y1B Installer And User Manual page 183

Main Sub code
code
Master Slave 1
,
—
—
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P749918-1 – 2023.12
Cause
Indoor unit communication error
Malfunction code: faulty wiring to
Q1/Q2
Too many indoor units are
connected to F1/F2 line
Warning because there is an error
on another unit (indoor/SV unit)
Connection malfunction over
indoor units or type mismatch
Connection malfunction over
indoor units or type mismatch
Wrong unit combination (multi
system)
Wrong outdoor unit connected
No SV unit connected
Wrong SV unit connected
SV unit refrigerant type abnormality Check SV unit refrigerant type
SV unit DIP switch abnormality
Mismatch between wiring path and
piping path during test run
Auto address malfunction
(inconsistency)
Maintenance warning (ventilation
fan)
Leak detection function related error codes
Unit is not prepared to execute leak
detection operation
Indoor unit is out of temperature
range 18~29°C for leak detection
operation.
25
Solution
Check user interface connection.
Check Q1/Q2wiring.
Check indoor unit amount and total
capacity connected.
Check if other indoor units/SV units
have a malfunction and confirm if
indoor unit mix is allowed.
Check if other indoor units have a
malfunction and confirm if indoor
unit mix is allowed.
Check if other indoor units have a
malfunction and confirm if indoor
unit mix is allowed.
Check if unit types are compatible.
Disconnect the outdoor unit.
Connect a SV unit.
Disconnect the SV unit.
Check the DIP switches of the SV
unit.
Mistake detected during SV unit
and indoor unit connection check
(see "22.7 To perform a SV/indoor
unit connection check" [
Confirm wiring between indoors
and SV units.
Refer to SV unit manual for correct
way of wiring.
Check if interconnected unit
amount matches with powered unit
amount (by monitor mode) or wait
until initialisation is finished.
SV unit ventilation needs
maintenance check. Refer to the SV
unit manual for more information.
Refer to requirements to be able to
execute leak detection operation.
Retry when ambient conditions are
satisfied.
Troubleshooting
|
SVEO SVS
(a) (b)
4
168]).
Installer and user reference guide
183