Table of Contents
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SiBE04-624_B
1. Convenient Service Check Function .....................................................73
2. Troubleshooting ....................................................................................74
Service Diagnosis
Service Diagnosis
1.1 Indoor Unit..............................................................................................73
1.2 Outdoor Unit ...........................................................................................73
2.1 Error Codes and Description ..................................................................74
2.2 Air conditioner does not run. ..................................................................75
2.3 Air conditioner runs but does not cool (heat) the room. .........................78
2.4 When operation starts, safety breaker works. ........................................80
2.5 Air conditioner makes big noise and vibration........................................82
2.6 Air is not humidified enough. ..................................................................83
2.7 Lights-out of Microcomputer Status Lamp..............................................85
2.8 Indoor Unit PCB Abnormality .................................................................86
2.9 Freeze-up Protection Control or Heating Peak-cut Control....................87
2.10 Fan Motor (DC Motor) or Related Abnormality.......................................89
2.11 Streamer Unit Abnormality .....................................................................91
2.12 Thermistor or Related Abnormality (Indoor Unit)....................................93
2.13 Front Panel Open / Close Abnormality...................................................94
2.14 Humidity Sensor Abnormality .................................................................95
2.15 Refrigerant Shortage ..............................................................................96
2.16 Low-voltage Detection or Over-voltage Detection..................................98
Communication Circuit Abnormality .....................................................101
2.19 Signal Transmission Error on Outdoor Unit PCB .................................104
2.20 Unspecified Voltage (between Indoor Unit and Outdoor Unit) .............105
2.21 Incomplete Setting for Hose Length .....................................................106
2.22 Outdoor Unit PCB Abnormality.............................................................107
2.23 OL Activation (Compressor Overload) .................................................108
2.24 Compressor Lock .................................................................................110
2.25 DC Fan Lock ........................................................................................111
2.26 Input Overcurrent Detection .................................................................112
2.27 Four Way Valve Abnormality................................................................113
2.28 Discharge Pipe Temperature Control...................................................115
2.29 High Pressure Control in Cooling .........................................................116
2.30 Compressor System Sensor Abnormality ............................................117
2.31 Damper Abnormality.............................................................................118
2.32 Position Sensor Abnormality ................................................................119
2.33 DC Voltage / Current Sensor Abnormality............................................121
2.34 Thermistor or Related Abnormality (Outdoor Unit)...............................122
2.35 Electrical Box Temperature Rise..........................................................124
2.36 Radiation Fin Temperature Rise ..........................................................126
2.37 Output Overcurrent Detection ..............................................................128
2.38 Fan Motor System Abnormality / Fan Lock ..........................................130
2.39 Heater Wire Abnormality ......................................................................131
Part 6
71
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