Si01-501
Table of Contents iii
Part 5 System Configuration....................................................... 51
1. System Configuration............................................................................52
2. Instructions............................................................................................53
2.1 Safety Precautions .................................................................................53
2.2 25/35 Class ............................................................................................55
2.3 50/60 Class ............................................................................................74
Part 6 Service Diagnosis.............................................................95
1. Caution for Diagnosis............................................................................96
2. Troubleshooting by Symptoms..............................................................98
3. Service Check Function ......................................................................103
4. Troubleshooting ..................................................................................106
4.1 Error Codes and Description ................................................................106
4.2 Indoor Unit PCB Abnormality ...............................................................107
4.3 Freeze-up Protection Control ...............................................................108
4.4 Fan Motor or Related Abnormality .......................................................109
4.5 Thermistor or Related Abnormality (Indoor Unit)..................................112
4.6 Signal Transmission Error (between Indoor and Outdoor Units)..........113
4.7 OL Activation (Compressor Overload) .................................................114
4.8 Compressor Lock .................................................................................115
4.9 DC Fan Lock ........................................................................................116
4.10 Input Over Current Detection ...............................................................117
4.11 Discharge Pipe Temperature Control...................................................119
4.12 High Pressure Control in Cooling .........................................................120
4.13 Position Sensor Abnormality ................................................................122
4.14 CT or Related Abnormality ...................................................................123
4.15 Thermistor or Related Abnormality (Outdoor Unit)...............................125
4.16 Electrical Box Temperature Rise..........................................................127
4.17 Radiation Fin Temperature Rise ..........................................................129
4.18 Output Over Current Detection.............................................................131
4.19 Insufficient Gas.....................................................................................133
4.20 Low-voltage Detection..........................................................................135
5. Check ..................................................................................................136
5.1 How to Check .......................................................................................136
Part 7 Removal Procedure ........................................................145
1. FT09/13DV2S, FT25/35DVM, FT25/35DSG.......................................146
1.1 Removal of Air Filter.............................................................................146
1.2 Removal of Front Panel........................................................................148
1.3 Removal of Front Grille ........................................................................150
1.4 Removal of Horizontal Blades and Vertical Blades ..............................153
1.5 Removal of Electrical Box ....................................................................156
1.6 Removal of PCB...................................................................................159
1.7 Removal of Drain Pan Unit...................................................................165
1.8 Removal of Fan Motor..........................................................................169
1.9 Removal of Heat Exchanger ................................................................171
1.10 Removal of Fan Rotor ..........................................................................174
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