Part 6 Service Diagnosis - Daikin B-Series Service Manual

Si04-306E
1. Caution for Diagnosis..........................................................................104
2. Problem Symptoms and Measures .....................................................105
3. Service Check Function ......................................................................106
4. Troubleshooting ..................................................................................109
5. Check ..................................................................................................142
Service Diagnosis
Service Diagnosis
4.1 Error Codes and Description ................................................................109
4.2 Indoor Unit PCB Abnormality ...............................................................110
4.3 Freeze-up Protection Control or High Pressure Control.......................111
4.4 Fan Motor (DC Motor) or Related Abnormality.....................................113
4.5 Thermistor or Related Abnormality (Indoor Unit)..................................115
4.6 Signal Transmission Error (between Indoor and Outdoor Units)..........116
4.7 OL Activation (Compressor Overload) .................................................118
4.8 Compressor Lock .................................................................................119
4.9 DC Fan Lock ........................................................................................120
4.10 Input Over Current Detection ...............................................................121
4.11 Four Way Valve Abnormality................................................................123
4.12 Discharge Pipe Temperature Control...................................................125
4.13 High Pressure Control in Cooling .........................................................126
4.14 Position Sensor Abnormality ................................................................128
4.15 CT or Related Abnormality ...................................................................129
4.16 Thermistor or Related Abnormality (Outdoor Unit)...............................131
4.17 Electrical Box Temperature Rise..........................................................133
4.18 Radiation Fin Temperature Rise ..........................................................135
4.19 Output Over Current Detection.............................................................137
4.20 Insufficient Gas.....................................................................................139
4.21 Low-voltage Detection..........................................................................141
5.1 How to Check .......................................................................................142
Part 6
103