Daikin VRV 5 RXYA8A7Y1B Installation And Operation Manual page 56

22 Troubleshooting
Main code Sub code
Master Slave 1
,
,
,
Installation and operation manual
56
Cause
Heat exchanger deicer temperature sensor
(R11T) – main PCB (X35A)
Upper heat exchanger – gas - temperature
sensor (R8T) – main PCB (X29A)
Lower heat exchanger – gas - temperature
sensor (R9T) main PCB (X29A)
Liquid main - temperature sensor (R3T) –
main PCB (X30A)
Subcool heat exchanger – liquid -
temperature sensor (R7T) - main PCB (X30A)
Subcool heat exchanger – liquid -
temperature sensor (R16T) - main PCB
(X35A)
Upper heat exchanger – liquid -temperature
sensor (R4T ) - main PCB (X30A)
Lower heat exchanger – liquid - temperature
sensor (R5T ) - main PCB (X30A)
Subcool heat exchanger – gas - temperature
sensor (R6T) – main PCB (X30A)
Receiver gas temperature sensor (R13T) –
main PCB (X46A)
High pressure sensor malfunction (S1NPH):
open circuit - main PCB (X32A)
High pressure sensor malfunction (S1NPH):
short circuit - main PCB (X32A)
Low pressure sensor malfunction (S1NPL):
open circuit - main PCB (X31A)
Low pressure sensor malfunction (S1NPL):
short circuit - main PCB (X31A)
Transmission outdoor unit - inverter: INV1
transmission trouble - main PCB (X20A,
X28A, X40A)
Transmission outdoor unit - inverter: FAN1
transmission trouble - main PCB (X20A,
X28A, X40A)
Transmission outdoor unit - inverter: FAN2
transmission trouble - main PCB (X20A,
X28A, X40A)
Transmission main PCB – sub PCB – main
PCB (X20A), sub PCB (X2A, X3A)
INV1 unbalanced power supply voltage
Reversed power supply phase malfunction
Reversed power supply phase malfunction
INV1 voltage power shortage
INV1 power phase loss
Malfunction code: system test run not yet
executed (system operation not possible)
An error occurred during the test run
Test run aborted
Test run aborted due to communication
issues
Commissioning of SV unit safety system is
not completed
Indoor unit communication error
Malfunction code: faulty wiring to Q1/Q2
Too many indoor units are connected to F1/
F2 line
Solution
Check connection on PCB or actuator
Check connection on PCB or actuator.
Check connection on PCB or actuator.
Check connection on PCB or actuator.
Check connection on PCB or actuator.
Check connection on PCB or actuator.
Check connection on PCB or actuator.
Check connection on PCB or actuator.
Check connection on PCB or actuator.
Check connection on PCB or actuator.
Check connection on PCB or actuator.
Check connection on PCB or actuator.
Check connection on PCB or actuator.
Check connection on PCB or actuator.
Check connection.
Check connection.
Check connection.
Check connection.
Check if power supply is within range.
Correct phase order.
Correct phase order.
Check if power supply is within range.
Check if power supply is within range.
Execute system test run.
Re-execute the test run.
Re-execute the test run.
Check the communication wires and re-
execute the test run.
Complete commissioning of SV unit safety
system. Refer to SV unit manual for more
information.
Check user interface connection.
Check Q1/Q2wiring.
Check indoor unit amount and total capacity
connected.
SVEO SVS
(a) (b)
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P739915-1 – 2023.12