SiBE041012_A
Table of Contents
iv
5.4
Electronic Expansion Valve Coil Check ...............................................125
5.5
Four Way Valve Performance Check ...................................................126
5.6
Inverter Unit Refrigerant System Check...............................................126
5.7
“Inverter Checker” Check .....................................................................127
5.8
Rotation Pulse Check on the Outdoor Unit PCB ..................................129
5.9
Installation Condition Check.................................................................130
5.10 Discharge Pressure Check...................................................................130
5.11 Outdoor Fan System Check .................................................................131
5.12 Main Circuit Short Check......................................................................131
5.13 Capacitor Voltage Check......................................................................132
5.14 Power Module Check ...........................................................................132
Part 7 Removal Procedure ........................................................133
1. Indoor Unit...........................................................................................134
1.1
Removal of Air Filters / Front Panel .....................................................134
1.2
Removal of Horizontal Blades ..............................................................138
1.3
Removal of Front Grille ........................................................................140
1.4
Removal of Front Panel Mechanism ASSY..........................................143
1.5
Removal of Display Lens ASSY ...........................................................145
1.6
Removal of Reduction Motor / Limit Switch..........................................146
1.7
Removal of Fan Guards / Electrical Box ..............................................148
1.8
Removal of PCBs .................................................................................151
1.9
Removal of Swing Motors ....................................................................157
1.10 Removal of Indoor Heat Exchanger .....................................................158
1.11 Removal of Fan Rotor / Fan Motor.......................................................161
1.12 Removal of Vertical Blade ASSYs........................................................164
2. Outdoor Unit - 25/35 Class..................................................................165
2.1
Removal of Outer Panels / Fan Motor..................................................165
2.2
Removal of Electrical Box ....................................................................174
2.3
Removal of PCBs .................................................................................177
2.4
Removal of Reactor / Partition Plate ....................................................185
2.5
Removal of Sound Blankets .................................................................187
2.6
Removal of Four Way Valve.................................................................189
2.7
Removal of Compressor.......................................................................192
3. Outdoor Unit - 50 Class.......................................................................194
3.1
Removal of Outer Panels .....................................................................194
3.2
Removal of Outdoor Fan / Fan Motor...................................................198
3.3
Removal of Electrical Box ....................................................................202
3.4
Removal of PCBs .................................................................................207
3.5
Removal of Sound Blankets / Thermistors ...........................................210
3.6
Removal of Four Way Valve.................................................................212
3.7
Removal of Electronic Expansion Valve...............................................213
3.8
Removal of Compressor.......................................................................214
Part 8 Trial Operation and Field Settings................................. 217
1. Pump Down Operation........................................................................218
2. Forced Cooling Operation ...................................................................219
3. Trial Operation ....................................................................................221
4. Field Settings ......................................................................................222
4.1
When 2 Units are Installed in 1 Room..................................................222