Daikin VRV IV+ Installer And User Reference Manual page 119

Main code
Master
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
Sub code
Slave 1 Slave 2
Cause
High pressure sensor
malfunction (S1NPH): open
circuit - A1P (X32A)
High pressure sensor
malfunction (S1NPH): short
circuit - A1P (X32A)
Low pressure sensor
malfunction (S1NPL): open
circuit - A1P (X31A)
Low pressure sensor
malfunction (S1NPL): short
circuit - A1P (X31A)
Transmission outdoor unit -
inverter: INV1 transmission
trouble - A1P (X20A, X28A,
X40A)
Transmission outdoor unit -
inverter: FAN1 transmission
trouble - A1P (X20A, X28A,
X40A)
Transmission outdoor unit -
inverter: FAN2 transmission
trouble - A1P (X20A, X28A,
X40A)
Transmission outdoor unit -
inverter: INV2 transmission
trouble - A1P (X20A, X28A,
X40A)
INV1 unbalanced power
supply voltage
INV2 unbalanced power
supply voltage
Reversed power supply phase
malfunction
Reversed power supply phase
malfunction
INV1 voltage power shortage
INV1 power phase loss
INV2 voltage power shortage
INV2 power phase loss
10 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.
Check connection.
Check connection.
Check connection.
Check if power supply is
within range.
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.
Check if power supply is
within range
Check if power supply is
within range.
Installer and user reference guide
119