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Si30-408
Troubleshooting
67
D. Troubleshooting
D. Troubleshooting
D. Troubleshooting
D. Troubleshooting
1. For Troubleshooting ..............................................................................68
2. Check Items before Troubleshooting ....................................................69
2.1
Check Items on Operation Condition (Essential Items as a Minimum) ..69
2.2
Check for Malfunction in Cooling Operation...........................................70
2.3
Check for Malfunction in Heating Operation...........................................71
3. Method of Troubleshooting ...................................................................72
3.1
Excessive / Insufficient Charging of Refrigerant.....................................72
3.2
Abnormal Judgment for Various Sensors...............................................75
3.3
Structure and Operation of Electronic Expansion Valve ........................83
3.4
Structure and Movements of Four-way Valve ........................................85
3.5
Structure and Operation of Solenoid Valve ............................................87
3.6
Structure and Operation of Two-way Solenoid Valve.............................88
3.7
Check on Outdoor Fan Motor.................................................................89
3.8
Diagnosis on Malfunction Code of Inverter System ...............................90
3.9
Diagnosis on Transmission System Malfunction ....................................93
4. Malfunction Tree Analysis (FTA)...........................................................96
4.1
Actuation of Freeze-up Prevention Control of Indoor Unit......................97
4.2
Actuation of HPS in Heating Operation ..................................................98
4.3
Abnormal Discharge Pipe Temperature in Cooling Operation ...............99
4.4
Water Leakage from Indoor Unit ..........................................................100
4.5
Defective Lubrication of Compressor ...................................................101
5. List of Malfunction Code......................................................................102
6. Operating Condition Check Sheet.......................................................108