25 | Troubleshooting
Installer and user reference guide
164
RXYSA8~12AMY1B
VRV 5-S system air conditioner
4P752782-1A – 2024.02
Main
code
Sub
code
Cause Solution SVEO
(a)
SVS
(b)
INV1 unbalanced power supply voltage Check if power supply is within range.
Reversed power supply phase
malfunction
Correct phase order.
Reversed power supply phase
malfunction
Correct phase order.
INV1 voltage power shortage Check if power supply is within range.
INV1 power phase loss Check if power supply is within range.
Malfunction code: system test run not
yet executed (system operation not
possible)
Execute system test run.
An error occurred during the test run Re-execute the test run.
, Test run aborted Re-execute the test run.
, Test run aborted due to
communication issues
Check the communication wires and
re-execute the test run.
Commissioning of SV unit safety
system is not completed
Complete commissioning of SV unit
safety system. Refer to SV unit manual
for more information.
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 outdoor unit connected Disconnect the outdoor unit.
There is a direct indoor unit
connection, but the field setting [2-54]
is not set to '1'.
Set field setting [2-54]=1
SV unit refrigerant type abnormality Check SV unit refrigerant type
SV unit DIP switch abnormality Check the DIP switches of the SV unit.
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