Daikin RXYTQ46TYF [24/36] Troubleshooting

Daikin RXYTQ46TYF [24/36] Troubleshooting
8 Troubleshooting
Installation and operation manual
24
RXYTQ8~16T7YF
VRV IV system air conditioner
4P388987-1C – 2016.02
Main code Sub code Cause Solution
Master Slave 1 Slave 2
Liquid temperature sensor (after
subcool HE) malfunction (R5T) - A1P
(X30A)
Check connection on PCB or actuator.
Liquid temperature sensor (coil)
malfunction (R4T) - A1P (X30A)
Check connection on PCB or actuator.
Gas temperature sensor (after subcool
HE) malfunction (R6T) - A1P (X30A)
Check connection on PCB or actuator.
High pressure sensor malfunction
(S1NPH): open circuit - A1P (X32A)
Check connection on PCB or actuator.
High pressure sensor malfunction
(S1NPH): short circuit - A1P (X32A)
Check connection on PCB or actuator.
Low pressure sensor malfunction
(S1NPL): open circuit - A1P (X31A)
Check connection on PCB or actuator.
Low pressure sensor malfunction
(S1NPL): short circuit - A1P (X31A)
Check connection on PCB or actuator.
Transmission outdoor unit - inverter:
INV1 transmission trouble - A1P
(X20A, X28A, X40A)
Check connection.
Transmission outdoor unit - inverter:
FAN1 transmission trouble - A1P
(X20A, X28A, X40A)
Check connection.
Transmission outdoor unit - inverter:
FAN2 transmission trouble - A1P
(X20A, X28A, X40A)
Check connection.
Transmission outdoor unit - inverter:
INV2 transmission trouble - A1P
(X20A, X28A, X40A)
Check connection.
INV1 unbalanced power supply
voltage
Check if power supply is within range.
INV2 unbalanced power supply
voltage
Check if power supply is within range.
Reversed power supply phase
malfunction
Correct phase order.
Reversed power supply phase
malfunction
Correct phase order.
INV1 voltage power shortage Check if power supply is within range.
INV1 power phase loss Check if power supply is within range.
INV2 voltage power shortage Check if power supply is within range
INV2 power phase loss Check if power supply is within range.
Malfunction code: System test run not
yet executed (system operation not
possible)
Execute system test run.
Faulty wiring to Q1/Q2 or indoor -
outdoor
Check (Q1/Q2) wiring.
Faulty wiring to Q1/Q2 or indoor -
outdoor
Check (Q1/Q2) wiring.
System test run abnormal ending Execute test run again.
Warning: faulty wiring to Q1/Q2 Check Q1/Q2 wiring.
Malfunction code: faulty wiring to Q1/
Q2
Check Q1/Q2 wiring.
Too many indoor units are
connected to F1/F2 line
Bad wiring between outdoor and
indoor units
Check indoor unit amount and total
capacity connected.
System mismatch. Wrong type of
indoor units combined (R410A,
R407C, RA, Hydrobox, etc)
Indoor unit malfunction
Check if other indoor units have
malfunction and confirm indoor unit
mix is allowed.

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