Daikin FTXS-L Series - Service Diagnosis

SiUS091133
87 Service Diagnosis
Part 6
Service Diagnosis
1. Troubleshooting with LED.........................................................................89
1.1 Indoor Unit.................................................................................................. 89
1.2 Outdoor Unit............................................................................................... 89
2. Problem Symptoms and Measures...........................................................90
3. Service Check Function ............................................................................91
4. Troubleshooting ........................................................................................94
4.1 Error Codes and Description...................................................................... 94
4.2 Indoor Unit PCB Abnormality ..................................................................... 95
4.3 Freeze-up Protection Control or Heating Peak-cut Control........................ 97
4.4 Fan Motor or Related Abnormality ............................................................. 99
4.5 Thermistor or Related Abnormality (Indoor Unit)...................................... 103
4.6 Refrigerant Shortage................................................................................ 104
4.7 Low-voltage Detection or Over-voltage Detection.................................... 107
4.8 Signal Transmission Error (between Indoor Unit and Outdoor Unit)........ 109
4.9 Signal Transmission Error on Outdoor Unit PCB
(24/30/36 Class Only)............................................................................... 111
4.10 Unspecified Voltage (between Indoor Unit and Outdoor Unit) ................. 112
4.11 Outdoor Unit PCB Abnormality................................................................. 113
4.12 OL Activation (Compressor Overload) ..................................................... 115
4.13 Compressor Lock ..................................................................................... 116
4.14 DC Fan Lock ............................................................................................ 117
4.15 Input Overcurrent Detection ..................................................................... 118
4.16 FourWay Valve Abnormality..................................................................... 119
4.17 Discharge Pipe Temperature Control....................................................... 121
4.18 High Pressure Control in Cooling............................................................. 123
4.19 Compressor System Sensor Abnormality ................................................ 125
4.20 Position Sensor Abnormality .................................................................... 128
4.21 DC Voltage / Current Sensor Abnormality (09/12 Class Only)................. 131
4.22 CT or Related Abnormality (24/30/36 Class Only) ................................... 132
4.23 Thermistor or Related Abnormality (Outdoor Unit)................................... 134
4.24 Electrical Box Temperature Rise.............................................................. 136
4.25 Radiation Fin Temperature Rise .............................................................. 138
4.26 Output Overcurrent Detection .................................................................. 140
5. Check......................................................................................................142
5.1 Thermistor Resistance Check .................................................................. 142
5.2 Fan Motor Connector Output Check ........................................................ 143
5.3 Hall IC Check ........................................................................................... 143
5.4 Power Supply Waveforms Check............................................................. 144
5.5 Electronic Expansion Valve Check........................................................... 144
5.6 FourWay Valve Performance Check........................................................ 145
5.7 Inverter Units Refrigerant System Check................................................. 145