Si12-619A
iv Table of Contents
3.4 Discharge Pipe Temperature Control...................................................104
3.5 Input Current Control ............................................................................104
3.6 Freeze-up Protection Control ...............................................................105
3.7 Heating Peak-cut Control .....................................................................105
3.8 Fan Control...........................................................................................106
3.9 Liquid Compression Protection Function 2...........................................106
3.10 Defrost Control .....................................................................................107
3.11 Low Hz High Pressure Limit .................................................................108
3.12 Electronic Expansion Valve Control .....................................................108
3.13 Malfunctions .........................................................................................112
3.14 Forced Operation Mode .......................................................................113
3.15 Wiring-Error Check ...............................................................................114
3.16 Additional Function...............................................................................116
Part 5 Operation Manual ...........................................................119
1. System Configuration..........................................................................120
1.1 Operation Instructions ..........................................................................120
2. Instruction............................................................................................121
2.1 FTK(X)S, CDK(X)S, FDK(X)S, FLXS, FVXS Series.............................121
2.2 FFQ 25/35/50/60 B...............................................................................189
Part 6 Service Diagnosis...........................................................201
1. Caution for Diagnosis.........................................................................202
1.1 Troubleshooting with Operation Lamp .................................................202
2. Problem Symptoms and Measures.....................................................204
3. Service Check Function ......................................................................205
4. Code Indication on the Remote Controller..........................................208
4.1 Error Codes and Description of Fault ...................................................208
5. Troubleshooting ..................................................................................209
5.1 Indoor Units ..........................................................................................209
5.2 Outdoor Units .......................................................................................210
5.3 Indoor Unit PCB Abnormality ...............................................................211
5.4 Freeze-up Protection Control or High Pressure Control.......................212
5.5 Fan Motor or Related Abnormality .......................................................214
5.6 Thermistor or Related Abnormality (Indoor Unit)..................................217
5.7 Shutter Drive Motor / Shutter Limit Switch Abnormality .......................218
5.8 Signal Transmission Error (between Indoor and Outdoor Units)..........219
5.9 Unspecified Voltage (between Indoor and Outdoor Units)...................221
5.10 Freeze-up Protection Control ...............................................................222
5.11 Outdoor Unit PCB Abnormality.............................................................224
5.12 OL Activation (Compressor Overload) .................................................225
5.13 Compressor Lock .................................................................................226
5.14 DC Fan Lock ........................................................................................228
5.15 Input Over Current Detection ...............................................................229
5.16 Four Way Valve Abnormality................................................................231
5.17 Discharge Pipe Temperature Control...................................................233
5.18 High Pressure Control in Cooling .........................................................234
5.19 Compressor Sensor System Abnormality ............................................236
5.20 Position Sensor Abnormality ................................................................238
5.21 CT or Related Abnormality ...................................................................239