Daikin R410A Technical Manual page 31

Phase Sequential (3ph)
The unit with Scroll Compressor can only rotate in one direction. For this reason, a protective device
(phase sequential) is fitted to prevent incorrect wiring of the electrical phases. When the three phases
are not connected correctly, the phase sequential operates, and the unit will not start. This device is
located in the control box of the outdoor unit.
The following table shows the LED indicator light for phase sequential under normal operation and fault
conditions.
Description
Normal operation
Reverse phase
T phase missing
S phase missing
R phase missing
R (main power)
phase missing
Overheat
High Pressure
Low Pressure
Sensor missing
ON
29
LED PW P_S
(Red) (Yellow) (Yellow)
OFF
P_T
Switch off the unit. Check the 3 phase wiring
Switch off the unit. Check the 3 phase wiring
Switch off the unit. Check the 3 phase wiring
Switch off the unit. Check the 3 phase wiring
Switch off the unit. Check the 3 phase wiring
High discharge temperature. Check the refrigerant system.
High discharge temperature. Check the refrigerant system.
Low discharge temperature. Check the refrigerant system.
Switch off the unit. Plug in sensor.
Fast Blink
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