What to do if my Daikin VRV IV-S Air Conditioner has reversed power supply phase malfunction?
- WWayne BairdSep 1, 2025
If your Daikin Air Conditioner has a reversed power supply phase malfunction, correct the phase order.

What to do if my Daikin VRV IV-S Air Conditioner has reversed power supply phase malfunction?
If your Daikin Air Conditioner has a reversed power supply phase malfunction, correct the phase order.
What to do if my Daikin Air Conditioner compressor casing temperature sensor malfunction (R8T): open circuit?
If the compressor casing temperature sensor (R8T) shows an open circuit - A1P (X29A) on your Daikin Air Conditioner, check the connection on the PCB or actuator.
What to do if my Daikin VRV IV-S has a malfunction code: System test run not yet executed?
If your Daikin Air Conditioner displays a malfunction code indicating that the system test run has not yet been executed, execute a system test run.
What to do if my Daikin VRV IV-S Air Conditioner de-icing temperature sensor malfunction (R7T)?
If the de-icing temperature sensor (R7T) - A1P (X30A) is malfunctioning on your Daikin Air Conditioner, check the connection on the PCB or actuator.
What to do if my Daikin VRV IV-S suction temperature sensor malfunction (R3T)?
If the suction temperature sensor (R3T) - A1P (X30A) is malfunctioning on your Daikin Air Conditioner, check the connection on the PCB or actuator.
What to do if my Daikin VRV IV-S high pressure sensor malfunction (S1NPH): short circuit?
If the high-pressure sensor (S1NPH) shows a short circuit - A1P (X32A) on your Daikin Air Conditioner, check the connection on the PCB or actuator.
What to do if my Daikin VRV IV-S Air Conditioner stop valve is closed or wrong during system test run?
If the stop valves are closed or wrong during the system test run of your Daikin Air Conditioner, open the stop valves.
What to do if my Daikin Air Conditioner outdoor unit stop valve is left closed?
If the stop valve of your Daikin Air Conditioner outdoor unit is left closed, open the stop valve on both the gas and liquid sides. Also, confirm that the piping and wiring of the specified indoor unit are connected correctly to the outdoor unit.
What to do if my Daikin VRV IV-S stop valve is closed (liquid)?
If the liquid stop valve on your Daikin Air Conditioner is closed, open the liquid stop valve.
What to do if my Daikin Air Conditioner discharge temperature is too high?
If the discharge temperature is too high on your Daikin Air Conditioner, it could be due to a closed stop valve or a refrigerant shortage. To resolve this, first open the stop valves. If the problem persists, check the refrigerant amount and recharge the unit.
| Refrigerant | R410A |
|---|---|
| Power Source | 380 - 415V, 3-phase, 50Hz |
| Indoor Units Compatibility | Wall mounted, Cassette, Duct |
| Operating Temperature Range (Cooling) | -5°C to 46°C |
| Control System | Centralized control |
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