SiAF332111E
174 Part 6 Service Diagnosis
1. Servicing Items to be Confirmed .........................................................177
1.1 Troubleshooting....................................................................................177
1.2 Precautions for Maintenance................................................................177
1.3 Refrigerant Properties (R-410A)...........................................................178
2. Symptom-based Troubleshooting .......................................................179
2.1 With Optional Infrared Presence/Floor Sensor.....................................181
2.2 For 6/8 HP Outdoor Units.....................................................................182
3. Error Code via Remote Controller.......................................................183
3.1 BRC1E63 .............................................................................................183
3.2 BRC4M Series......................................................................................184
4. Error Code via Outdoor Unit PCB .......................................................185
4.1 4/5 HP Models......................................................................................185
4.2 6-12 HP Models....................................................................................189
5. Troubleshooting by Error Code ...........................................................190
5.1 Error Codes and Descriptions ..............................................................190
5.2 Error Codes (Sub Codes).....................................................................193
5.3 External Protection Device Abnormality ...............................................197
5.4 Indoor Unit PCB Abnormality ...............................................................198
5.5 Drain Level Control System Abnormality..............................................199
5.6 Indoor Fan Motor Lock, Overload.........................................................201
5.7 Indoor Fan Motor Abnormality..............................................................203
5.8 Power Supply Voltage Abnormality ......................................................208
5.9 Electronic Expansion Valve Coil Abnormality, Dust Clogging ..............211
5.10 Humidifier System Abnormality ............................................................212
5.11 Auto Grille Unit Error ............................................................................213
5.12 Defective Capacity Setting ...................................................................214
5.13
Transmission Abnormality (between Indoor Unit PCB and Fan PCB)
...215
5.14 Transmission Error ...............................................................................217
5.15 Transmission Error (between Indoor Unit PCB and Auto Grille
Control PCB) ........................................................................................218
5.16 Thermistor Abnormality ........................................................................220
5.17 Combination Abnormality (between Indoor Unit PCB and Fan PCB)...221
5.18 Capacity Setting Abnormality ...............................................................222
5.19 Indoor Unit PCB Abnormality ...............................................................223
5.20 Infrared Presence/Floor Sensor Error ..................................................224
5.21 Remote Controller Thermistor Abnormality ..........................................229
5.22 Outdoor Unit Main PCB Abnormality....................................................230
5.23 Current Leakage Detection ..................................................................231
5.24 Missing of Leakage Detection Core .....................................................232
5.25 Activation of High Pressure Switch ......................................................233
5.26 Activation of Low Pressure Sensor ......................................................235
5.27 Compressor Motor Lock .......................................................................237
Part 6
Service Diagnosis
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