SiMT041311E
Service Diagnosis
122
2.38 Unspecified Voltage (Between Indoor Unit and Outdoor Unit) .............177
2.39 Improper Power Supply Wiring.............................................................178
2.40 Incomplete Setting for Hose Length .....................................................179
2.41 Lights-out of Microcomputer Status Lamp............................................180
3. Check ..................................................................................................181
3.1
Thermistor Resistance Check ..............................................................181
3.2
Fan Motor Connector Output Check ....................................................182
3.3
Humidity Sensor Check........................................................................182
3.4
Power Supply Waveforms Check.........................................................183
3.5
Electronic Expansion Valve Check.......................................................183
3.6
Four Way Valve Performance Check ...................................................184
3.7
Inverter Unit Refrigerant System Check...............................................184
3.8
Inverter Analyser Check .......................................................................185
3.9
Rotating Pulse Check on Outdoor Unit PCB ........................................187
3.10 Installation Condition Check.................................................................188
3.11 Discharge Pressure Check...................................................................188
3.12 Outdoor Fan System Check .................................................................189
3.13 Main Circuit Short Check......................................................................189
3.14 Power Module Check ...........................................................................190