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CONTENTS
ORIGINAL INSTRUCTION ................................................................................ 4
WARNING INDICATIONS ON THE AIR CONDITIONER UNIT6
PRECAUTION FOR SAFETY ............................................................................ 7
NEW REFRIGERANT (R410A) ....................................................................... 13
1. Safety Caution Concerned to New Refrigerant .................................................... 13
2. Cautions on Installation/Service ............................................................................ 13
3. Pipe Materials .......................................................................................................... 13
1. AIR DUCTING WORK............................................................................... 15
1-1. Static Pressure Characteristics ....................................................................... 15
2. CONSTRUCTION VIEWS (EXTERNAL VIEWS) ...................................... 17
2-1. Compact 4-way Cassette Type ......................................................................... 17
2-2. Concealed Duct Type ........................................................................................ 18
2-3. Ceiling Type ....................................................................................................... 19
3. WIRING DIAGRAM................................................................................... 20
3-1. Indoor Unit......................................................................................................... 20
4. SPECIFICATIONS OF ELECTRICAL PARTS .......................................... 23
4-1. Compact 4-way Cassette Type ......................................................................... 23
4-2. Concealed Duct Type ........................................................................................ 23
4-3. Ceiling Type ....................................................................................................... 23
5. CONTROL BLOCK DIAGRAM................................................................. 24
5-1. Indoor Controller Block Diagram..................................................................... 24
5-2. Control Specifications ...................................................................................... 27
5-3. Indoor Print Circuit Board ................................................................................ 40
NOTE
A direct current motor is adopted for indoor fan motor in the Concealed Duct Standard Type air conditioner.
Caused from its characteristics, a current limit works on the direct current motor. When replacing the
high-performance filter or when opening the service board, be sure to stop the fan. If an above action is
executed during the fan operation, the protective control works to stop the unit operation, and the check
code “P12” may be issued. However it is not a trouble. When the desired operation has finished, be sure to
reset the system to clear “P12” error code using the leak breaker of the indoor unit. Then push the
operation stop button of the remote controller to return to the usual operation.