SiUS041111iii Table of Contents3.4 Discharge Pipe Temperature Control......................................................... 393.5 Input Current Control.................................................................................. 403.6 Freeze-up Protection Control ..................................................................... 413.7 Heating Peak-cut Control ........................................................................... 413.8 Outdoor Fan Control................................................................................... 423.9 Liquid Compression Protection Function.................................................... 423.10 Defrost Control ........................................................................................... 433.11 Electronic Expansion Valve Control ........................................................... 453.12 Malfunctions ............................................................................................... 48Part 5Operation Manual ................................................................ 491. System Configuration................................................................................502. 09/12 Class ...............................................................................................512.1 Remote Controller ...................................................................................... 512.2 AUTO · DRY · COOL · HEAT · FAN Operation .......................................... 532.3 Adjusting the Airflow Direction and Rate .................................................... 552.4 COMFORT AIRFLOW Operation ............................................................... 572.5 POWERFUL Operation .............................................................................. 582.6 ECONO Operation ..................................................................................... 592.7 OFF TIMER Operation ............................................................................... 602.8 ON TIMER Operation ................................................................................. 613. 15/18/24 Class ..........................................................................................623.1 Remote Controller ...................................................................................... 623.2 AUTO · DRY · COOL · HEAT · FAN Operation .......................................... 643.3 Adjusting the Airflow Direction and Rate .................................................... 663.4 POWERFUL Operation .............................................................................. 683.5 OFF TIMER Operation ............................................................................... 693.6 ON TIMER Operation ................................................................................. 70Part 6Service Diagnosis................................................................ 711. Troubleshooting with LED .........................................................................731.1 Indoor Unit.................................................................................................. 731.2 Outdoor Unit ............................................................................................... 732. Problem Symptoms and Measures ...........................................................743. Service Check Function ............................................................................754. Troubleshooting ........................................................................................784.1 Error Codes and Description ...................................................................... 784.2 Indoor Unit PCB Abnormality ..................................................................... 794.3 Freeze-up Protection Control or Heating Peak-cut Control........................ 804.4 Fan Motor (DC Motor) or Related Abnormality........................................... 824.5 Thermistor or Related Abnormality (Indoor Unit)........................................ 854.6 Signal Transmission Error (between Indoor Unit and Outdoor Unit) .......... 864.7 Unspecified Voltage (between Indoor Unit and Outdoor Unit) ................... 88