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CONTENTS
32) Indoor Air Filters Inspection ........................................................................................61
33) Remote Controller Operation Inspection.....................................................................62
34) Indoor Unit Temperature Inspection............................................................................ 62
35) Check After Work ........................................................................................................62
REPLACEMENT OF MAIN COMPONENTS
1. Before Starting Your Work..................................................................... 63
2. Replacement of Engine Unit.................................................................. 65
3. Replacement of Cylinder Head.............................................................. 97
4. Replacing the Compressor .................................................................. 116
CONTROL
1. System Control Functions ................................................................... 134
1) System Block Diagram..............................................................................................134
2. Control Details ..................................................................................... 135
1) Temperature Control Start / Stop..............................................................................135
2) Starting the Outdoor Unit
(Starting the Engine and Engaging the Compressor Clutch).................... 135
3) Transition from Start Control to Normal Operation Control.......................................136
4) Indicated Engine Speed............................................................................................136
5) Refrigerant Flow Volume ..........................................................................................136
6) Defrosting (In Heating Only) ..................................................................................... 140
7) Outdoor Fan.............................................................................................................. 141
8) Oil Bypass Control Valve .......................................................................................... 142
9) Compressor Heater...................................................................................................142
10) Drain Filter Heater / Drain Hose Heater ....................................................................142
11) Flow Chart of Backup Operation under Combined Installation
(Conceptual Chart) ...................................................................................143
3. Function Settings................................................................................. 145
1) Outdoor unit ..............................................................................................................145
2) Cool/Heat Switching Setting .....................................................................................148
4. System Input/Output Specifications..................................................... 150
1) Outdoor Unit Input / Output Specifications................................................................150
TROUBLESHOOTING
1. Error Code Description and Possible Cause ....................................... 154
2. Parts Characteristics ........................................................................... 177
3. Failure Phenomenon ........................................................................... 183
1) The System will not Operate..................................................................................... 183
2) Engine will not Start ..................................................................................................184
3) Engine Starts But Stalls ............................................................................................185
4) Engine Coolant Temperature Abnormality................................................................186
5) Oil Pressure Abnormality .......................................................................................... 186
6) Over Speed...............................................................................................................187
7) High Pressure Abnormality in Cooling Operation ..................................................... 187
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