SiENBE04-808_A
iii Table of Contents
Part 5 Operation Manual ............................................................. 61
1. System Configuration............................................................................62
2. FTXS20/25/35/42/50G2V1B .................................................................63
2.1 Auto Dry Cool Heat Fan Operation ........................................................64
2.2 Adjusting the Airflow Direction................................................................66
2.3 COMFORT AIRFLOW and INTELLIGENT EYE Operation....................68
2.4 POWERFUL Operation ..........................................................................71
2.5 OUTDOOR UNIT QUIET Operation.......................................................72
2.6 ECONO Operation .................................................................................73
2.7 TIMER Operation ...................................................................................74
2.8 WEEKLY TIMER Operation ...................................................................76
3. ATXS20/25/35/42/50G2V1B .................................................................81
3.1 Auto Dry Cool Heat Fan Operation ........................................................82
3.2 Adjusting the Airflow Direction................................................................84
3.3 COMFORT AIRFLOW Operation ...........................................................86
3.4 INTELLIGENT EYE Operation ...............................................................87
3.5 POWERFUL Operation ..........................................................................89
3.6 OUTDOOR UNIT QUIET Operation.......................................................90
3.7 ECONO Operation .................................................................................91
3.8 TIMER Operation ...................................................................................92
Part 6 Service Diagnosis............................................................. 94
1. Caution for Diagnosis............................................................................95
1.1 Troubleshooting with LED ......................................................................95
2. Problem Symptoms and Measures .......................................................96
3. Service Check Function ........................................................................97
3.1 ARC452 Series.......................................................................................97
3.2 ARC433 Series.....................................................................................100
4. Troubleshooting ..................................................................................103
4.1 Error Codes and Description ................................................................103
4.2 Indoor Unit PCB Abnormality ...............................................................104
4.3 Freeze-up Protection Control or Heating Peak-cut Control..................105
4.4 Fan Motor (DC Motor) or Related Abnormality.....................................107
4.5 Thermistor or Related Abnormality (Indoor Unit)..................................109
4.6 Signal Transmission Error (between Indoor Unit and Outdoor Unit) ....110
4.7 Unspecified Voltage (between Indoor Unit and Outdoor Unit) .............111
4.8 Outdoor Unit PCB Abnormality.............................................................112
4.9 OL Activation (Compressor Overload) .................................................114
4.10 Compressor Lock .................................................................................115
4.11 DC Fan Lock ........................................................................................116
4.12 Input Overcurrent Detection .................................................................117
4.13 Four Way Valve Abnormality................................................................118
4.14 Discharge Pipe Temperature Control...................................................120
4.15 High Pressure Control in Cooling .........................................................122
4.16 Compressor System Sensor Abnormality ............................................124
4.17 Position Sensor Abnormality ................................................................126
4.18 DC Voltage / Current Sensor Abnormality (20/25/35/42 Class) ...........129
4.19 CT or Related Abnormality (50 Class)..................................................130
4.20 Thermistor or Related Abnormality (Outdoor Unit)...............................132
4.21 Electrical Box Temperature Rise..........................................................134
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