Daikin 4MXS-R Series Service Manual page 5

SiUS121736EA
Part 6 Service Diagnosis.............................................................. 131
1. General Problem Symptoms and Check Items .......................................133
2. Troubleshooting with LED .......................................................................134
3. Service Diagnosis ................................................................................... 137
4. Code Indication on Remote Controller .................................................... 149
5. Troubleshooting for RA Indoor Unit.........................................................151
6. Troubleshooting for SA Indoor Unit.........................................................163
7. Troubleshooting for Outdoor Unit............................................................ 179
Table of Contents
2.1 Indoor Unit................................................................................................ 134
2.2 Outdoor Unit ............................................................................................. 136
3.1 RA Indoor Unit.......................................................................................... 137
3.2 SA Indoor Unit .......................................................................................... 143
4.1 RA Indoor Unit.......................................................................................... 149
4.2 SA Indoor Unit .......................................................................................... 149
4.3 Outdoor Unit ............................................................................................. 150
5.1 Indoor Unit PCB Abnormality ................................................................... 151
5.2 Freeze-up Protection Control, Heating Peak-cut Control ......................... 153
5.3 Indoor Fan Motor or Related Abnormality ................................................ 154
5.4 Thermistor or Related Abnormality........................................................... 158
5.5 Front Panel Open/Close Fault.................................................................. 159
5.6 Signal Transmission Error (Between Indoor Unit and Outdoor Unit)........ 160
5.7 Mismatching of Indoor Unit and Outdoor Unit .......................................... 162
6.1 Indoor Unit PCB Abnormality ................................................................... 163
6.2 Drain Level Control System Abnormality.................................................. 164
6.3 Indoor Fan Motor or Related Abnormality ................................................ 165
6.4 Indoor Fan PCB Abnormality.................................................................... 169
6.5 Humidifier or Related Abnormality............................................................ 170
6.6 Thermistor or Related Abnormality........................................................... 171
6.7 Presence Sensor or Floor Sensor Abnormality ........................................ 172
6.8 Remote Controller Thermistor Abnormality .............................................. 173
6.9 Signal Transmission Error (Between Indoor Unit and Outdoor Unit)........ 174
6.10 Signal Transmission Error
(Between Indoor Unit and Remote Controller) ......................................... 176
6.11 Signal Transmission Error
(Between MAIN Remote Controller and SUB Remote Controller) ........... 177
6.12 Mismatching of Indoor Unit and Outdoor Unit .......................................... 178
7.1 Refrigerant Shortage ................................................................................ 179
7.2 Low-voltage Detection or Over-voltage Detection.................................... 181
7.3 Wiring Error Check Unexecuted ............................................................... 183
7.4 Unspecified Voltage (Between Indoor Unit and Outdoor Unit),
Anti-Icing Control in Other Rooms............................................................ 184
7.5 Anti-Icing Control for Indoor Unit .............................................................. 185
7.6 Outdoor Unit PCB Abnormality................................................................. 187
7.7 OL Activation (Compressor Overload) ..................................................... 188
7.8 Compressor Lock ..................................................................................... 190
7.9 DC Fan Lock ............................................................................................ 191
7.10 Input Overcurrent Detection ..................................................................... 192
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