Service Manual
Table Of Contents
SiUS071735E
53 Service Diagnosis
5. Check ........................................................................................................99
5.1 Thermistor Resistance Check .................................................................... 99
5.2 Indoor Fan Motor Connector Check ......................................................... 100
5.3 Power Supply Waveforms Check............................................................. 100
5.4 Electronic Expansion Valve Check........................................................... 101
5.5 Four Way Valve Performance Check ....................................................... 102
5.6 Inverter Unit Refrigerant System Check................................................... 102
5.7 Inverter Analyzer Check ........................................................................... 103
5.8 Rotation Pulse Check on the Outdoor Unit PCB ...................................... 105
5.9 Installation Condition Check..................................................................... 106
5.10 Discharge Pressure Check....................................................................... 106
5.11 Outdoor Fan System Check ..................................................................... 107
5.12 Main Circuit Short Check.......................................................................... 107
5.13 Power Module Check ............................................................................... 109