Daikin RDXYQ5T8V1B Installer And User Manual page 129

Main code Sub code
RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B
VRV IV heat pump for indoor installation
4P499898-1B – 2021.12
Cause
Liquid temperature sensor (after
subcool HE) malfunction
Compressor unit: (R5T) - A1P (X30A)
Gas temperature sensor (after subcool
HE) malfunction
Compressor unit: (R6T) - A1P (X30A)
High pressure sensor malfunction
Compressor unit: (S1NPH): open circuit
- A1P (X32A)
High pressure sensor malfunction
Compressor unit: (S1NPH): short circuit
- A1P (X32A)
Low pressure sensor malfunction
Compressor unit: (S1NPL): open circuit -
A1P (X31A)
Low pressure sensor malfunction
Compressor unit: (S1NPL): short circuit -
A1P (X31A)
Transmission outdoor unit - inverter:
INV1 transmission trouble
Compressor unit: A1P (X20A, X28A,
X42A)
INV1 unbalanced power supply voltage
Heat exchanger unit capacity setting
malfunction.
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)
Faulty wiring to Q1/Q2 or indoor -
outdoor
Faulty wiring to Q1/Q2 or indoor -
outdoor
System test run abnormal ending
22 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.
Check if power supply is within range.
Check the type of heat exchanger unit.
If necessary, replace the heat exchanger
unit.
Correct phase order.
Correct phase order.
Check if power supply is within range.
Check if power supply is within range.
Execute system test run.
Check (Q1/Q2) wiring. Do NOT use Q1/
Q2.
Check (Q1/Q2) wiring. Do NOT use Q1/
Q2.
Execute test run again.
Installer and user reference guide
129