Daikin VRV 5 REYA8A7Y1B Installer And User Manual page 165

Main Sub code
code
Master Slave 1
REMA5+REYA8~20A7Y1B
VRV 5 heat recovery
4P687640-1 – 2022.07
Cause
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
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.
Correct phase order.
Correct phase order.
Check if power supply is within
range.
Check if power supply is within
range.
25 Troubleshooting
|
(a)
SVEO SVS
Installer and user reference guide
165
(b)