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Troubleshooting
Installer and user reference guide
147
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1 – 2020.01
Main
code
Cause
Solution
SVEO
(a)
SVS
(b)
Discharge temperature sensor
malfunction (R21T): open circuit /
short circuit - A1P (X19A)
Check connection on PCB or actuator.
Suction temperature sensor
malfunction
(R3T) - A1P (X30A) (suction)
(R5T) - A1P (X30A) (subcool)
Check connection on PCB or actuator.
Liquid temperature sensor (coil)
malfunction (R4T) - A1P (X30A)
Check connection on PCB or actuator.
Liquid temperature sensor (after
subcool HE) malfunction (R7T) - A1P
(X30A)
Check connection on PCB or actuator.
Gas temperature sensor (after subcool
HE) malfunction (R6T) - A1P (X30A)
(superheat)
Check connection on PCB or actuator.
High pressure sensor malfunction
(S1NPH): open circuit / short circuit -
A1P (X32A)
Check connection on PCB or actuator.
Low pressure sensor malfunction
(S1NPL): open circuit / short circuit -
A1P (X31A)
Check connection on PCB or actuator.
Transmission outdoor unit - inverter:
INV1 / FAN1 transmission trouble
Check connection.
INV1 unbalanced power supply voltage Check if power supply is within range.
Insufficient supply voltage
Check if the supply voltage is supplied
properly.
Malfunction code: System test run not
yet executed (system operation not
possible)
Execute system test run.
No power is supplied to the outdoor
unit.
Check if the power wiring for the outdoor
unit is connected correctly.
System mismatch. Wrong type of
indoor units combined (R410A, R407C,
RA, etc)
Indoor unit malfunction
Check if other indoor units have malfunction
and confirm indoor unit mix is allowed.
Improper type of indoor units are
connected.
Check the type of indoor units that are
currently connected. If they are not proper,
replace them with proper ones.
Incorrect interconnections between
units.
Connect interconnections F1 and F2 of the
connected BP unit correctly to the outdoor
unit's PCB (TO BP UNIT). Make sure that the
communication with the BP unit is enabled.
Содержание VRV 5-S Series
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