Daikin FTN25JXV1 Technical Manual

Daikin FTN25JXV1 Technical Manual Manual pdf 59 page image

56TroubleshootingPhase SequencerThe unit with Scroll Compressor only can rotate in one direction. For this reason, a protective device (phasesequencer) is fitted to prevent incorrect wiring of the electrical phases. When the three phases are notconnected 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 faultconditions.LEDDescriptionPW(Red)P_R(Yellow)P_S(Yellow)P_T(Yellow) ActionsNormal Operation -Reverse Phase Switch off the unit. Check the 3 phase wiring.T Phase Missing Switch off the unit. Check the 3 phase wiring.S Phase Missing Switch off the unit. Check the 3 phase wiring.R Phase Missing Switch off the unit. Check the 3 phase wiring.S & T PhaseMissing* Switch off the unit. Check the 3 phase wiring.Overload* High discharge temperature.Check refrigerant system.Sensor Missing* Switch off the unit. Plug in sensor.ON OFF BLINKNote: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.

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