High - Daikin FT-J series Technical Manual

Phase Sequencer
The unit with Scroll Compressor only can rotate in one direction. For this reason, a protective device (phase
sequencer) is fi tted to prevent incorrect wiring of the electrical phases. When the three phases are not
connected correctly, the phase sequencer 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 sequencer under normal operation and fault
conditions.
LED
Description
Normal Operation
Reverse Phase
T Phase Missing
S Phase Missing
R Phase Missing
S & T Phase
Missing*
Overload*
Sensor Missing*
ON OFF
Note:
1. " * " indicates additional function for PP01 phase sequencer.
2. When R phase missing, no LED or buzzer will indicate the error, but relay 71 (COMMON) and 81 (NO) will cut off.
3. The unit will check discharge sensor availability only during power up.
4. All errors can only recover through manually reset.
PW P_R P_S
(Red) (Yellow) (Yellow)
BLINK
P_T
(Yellow)
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 refrigerant system.
Switch off the unit. Plug in sensor.
Troubleshooting
Actions
-
54