9.10 Action of 4-way valve ....................................................................................32
9.11 Two speeds outdoor fan function ....................................................................33
9.11.1 Outdoor fan starts at the same time with compressor ..............................33
9.11.2 Outdoor fan action in heating mode .......................................................33
9.11.3 Outdoor fan action in cooling & drying mode ...........................................33
9.12 Timer function ..............................................................................................33
9.12.1 Timing range is 24 hours ......................................................................33
9.12.2 Timer on. ...........................................................................................33
9.12.3 Timer off. ...........................................................................................33
9.12.4 Timer on/off. ......................................................................................33
9.12.5 Timer off/on. ......................................................................................33
9.12.6 The tolerance of timer is 1 minute per hour. ...........................................33
9.13 Sleep function mode .....................................................................................33
9.13.1 Operation time in sleep mode is 7 hours ................................................33
9.13.2 In cooling, heating or auto mode ...........................................................33
9.13.3 Operation process in sleep mode is as follow ..........................................33
9.13.4 If user uses timer on function in sleep mode ...........................................33
9.13.5 When user uses timer off function in sleep .............................................33
9.14 Auto-Restart function ....................................................................................33
9.15 Outdoor chassis heating cable (optional) .........................................................34
10. Troubleshooting ................................................................................................. 35
10.1 Indoor Unit Error Display ...............................................................................36
10.2 Diagnosis and Solution ..................................................................................37
10.2.1 E0 (EEPROM parameter error) error diagnosis and solution .......................37
10.2.2 E1 (indoor / outdoor units communication protection) error diagnosis and
solution .........................................................................................................37
10.2.3 E2 (zero-crossing signal error) diagnosis and solution ..............................38
10.2.4 E3 (indoor fan speed out of control) diagnosis and solution ......................38
10.2.5 E5 (Open or short circuit of outdoor ambient or condenser temperature sensor)
diagnosis and solution. ....................................................................................38
10.2.6 E6 (open or short circuit of indoor room or evaporator temperature sensor)
diagnosis and solution. ....................................................................................39
10.2.7 P0 (IGBT over-strong current protection) diagnosis and solution. ..............39
10.2.8 P1 (over voltage or too low voltage protection) diagnosis and solution. ......39
10.2.9 P2 (temperature protection of compressor top) diagnosis and solution. ......40
10.2.10 P4 (inverter compressor drive error) diagnosis and solution. ...................40
10.3 Key parts checking. ......................................................................................41
10.3.1. Compressor checking ..........................................................................41
10.3.2 Outdoor Fan Motor ..............................................................................41
10.3.3 Indoor Fan Motor ................................................................................41
10.3.4 Step Motor (Model: MP24GA). ...............................................................42
10.3.5 Temperature Sensors. .........................................................................43