Daikin VRV IV+ Installer And User Reference Manual page 157

Main code
Master
REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P561154-1A – 2020.10
Sub code
Slave 1 Slave 2
Cause
Upper heat exchanger – liquid -
temperature sensor (R4T ) -
main PCB (X30A)
Lower heat exchanger – liquid -
temperature sensor (R5T ) -
main PCB (X30A)
Auto charge temperature
sensor (R14T ) – sub PCB (X15A)
Subcool heat exchanger – gas -
temperature sensor (R6T) –
main PCB (X30A)
Receiver gas temperature
sensor (R13T) – sub PCB (X17A)
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 outdoor unit -
inverter: INV2 transmission
trouble - main PCB (X20A,
X28A, X40A)
Transmission main PCB – sub
PCB – main PCB (X20A), sub
PCB (X2A, X3A)
24 Troubleshooting
|
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.
Check connection.
Check connection.
Check connection.
Check connection.
Installer and user reference guide
157