![background image](http://html1.mh-extra.com/html/daikin/mks-t-series/mks-t-series_service-manual_3280982106.webp)
SiSG121917E
101
Part 6 Service Diagnosis
1. General Problem Symptoms and Check Items ...................................103
2. Troubleshooting with LED ...................................................................104
2.1 Indoor Unit............................................................................................104
2.2 Outdoor Unit .........................................................................................106
3.1 ARC466 Series Wireless Remote Controller........................................107
3.2 ARC433 Series Wireless Remote Controller........................................110
4. Code Indication on Remote Controller ................................................114
4.1 Indoor Unit............................................................................................114
4.2 Outdoor Unit .........................................................................................115
5. Troubleshooting for Wall Mounted and LSP Duct Type Indoor Unit ...116
5.1 Indoor Unit PCB Abnormality ...............................................................116
5.2 Freeze-up Protection Control ...............................................................118
5.3 Indoor Fan Motor or Related Abnormality ............................................119
5.4 Thermistor or Related Abnormality (Indoor Unit)..................................123
5.5 Signal Transmission Error (Between Indoor Unit and Outdoor Unit)....124
5.6 Unspecified Voltage (Between Indoor Unit and Outdoor Unit) .............126
6. Troubleshooting for MSP Duct Type Indoor Unit ................................127
6.1 Indoor Unit PCB Abnormality ...............................................................127
6.2 Drain Water Level Control System Abnormality ...................................128
6.3 Indoor Fan Motor or Related Abnormality ............................................129
6.4 Fan PCB Abnormality...........................................................................131
6.5 Drain System Abnormality....................................................................132
6.6 Thermistor or Related Abnormality.......................................................133
6.7 Remote Controller Thermistor Abnormality ..........................................134
6.8 Signal Transmission Error (Between Indoor Unit and Remote Controller)
6.9 Signal Transmission Error (Between MAIN Remote Controller and SUB
7. Troubleshooting for Outdoor Unit........................................................138
7.1 Refrigerant Shortage ............................................................................138
7.2 Low-voltage Detection or Over-voltage Detection................................140
7.3 Wiring Error Check Unexecuted...........................................................142
7.4 Signal Transmission Error (on Outdoor Unit PCB)...............................143
7.5 Unspecified Voltage (Between Indoor Unit and Outdoor Unit)/Anti-icing
Function in Other Rooms .....................................................................144
7.6 Anti-icing Control for Indoor Unit ..........................................................145
7.7 Outdoor Unit PCB Abnormality.............................................................147
7.8 OL Activation (Compressor Overload) .................................................148
7.9 Compressor Lock .................................................................................150
7.10 DC Fan Lock ........................................................................................151
Part 6
Service Diagnosis