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Contents
Page
Please Read Before Starting Important ....................................................... i
Check of Limit Density Important ................................................................ii
Line Up .........................................................................................................iv
Section 1 : ECO MULTI SYSTEM Unit Specifications ........................ I - 1
1. Outdoor Unit ....................................................................................................... I - 3
2. 4-way Air Discharge Semi-concealed Type ........................................................I - 19
3. 2-way Air Discharge Semi-concealed Type ........................................................I - 34
4. 1-way Air Discharge Semi-concealed Type ........................................................I - 48
5. Wall Mounted Type .............................................................................................I - 56
6. Ceiling Mounted Type .........................................................................................I - 66
7. Concealed Duct Type ......................................................................................... I - 78
8. Concealed Duct High Static Pressure Type ........................................................I - 97
9. Floor-Standing Type (F Type) .............................................................................I - 107
10. Concealed Floor-Standing Type (FM Type) ........................................................I - 119
11. 1-way Air Discharge Semi-concealed-Slim Type (SL Type) .............................. I - 135
Section 2 : Processes and Functions ................................................ II - 1
1. Compressor Control ............................................................................................II - 2
2. Reverse Cycle Defrosting ...................................................................................II - 6
3. Reverse Cycle Starting Control...........................................................................II - 7
4. Outdoor Fan Control ........................................................................................... II - 7
5. 4-way Valve Switching Control............................................................................II - 7
6. Save Valve Control ............................................................................................. II - 7
7. Outdoor Electronic Control Valve........................................................................II - 8
8. Liquid Valve Control ............................................................................................II - 8
9. Room Temperature Control ................................................................................II - 9
10. Auto. Mode for Automatic Heating/Cooling Switching ........................................ II - 10
11. Heating Preparations .......................................................................................... II - 11
12. Dehumidifying Control.........................................................................................II - 12
13. Automatic Fan Speed Control .............................................................................II - 12
14. Auto-flap Control ................................................................................................. II - 13
15. Drain Pump Control ............................................................................................ II - 14
16. Indoor Electronic Control Valve...........................................................................II - 14
17. Dischage Temperature Control (Only for U, D Type) ......................................... II - 15
18. Automatic Restart Function after Power Failure................................................. II - 15
19. Filter Sign............................................................................................................ II - 15
Section 3 : Service Procedures ......................................................... III - 1
1. Troubleshooting .................................................................................................. III - 2
2. Sensor and Solenoid Layout Diagram ................................................................III - 37
3. Thermistor Characteristic Curve .........................................................................III - 46
4. Test Run ............................................................................................................. III - 47
5. PCBs illustrations ................................................................................................ III - 50
6. Check of Density Limit ........................................................................................ III - 53
7. Cautions for New Refrigerant R407C..................................................................III - 54
8. Compressor Failure ............................................................................................ III - 56
9. Operation Procedure for Replacing the Compressor ......................................... III - 57
10. Malfunction due to Noise ....................................................................................III - 59
11. Checking procedure for PCB (Printed Circuit Board) ......................................... III - 59
12. Check Pins.......................................................................................................... III - 60
13. Double Speed of Time for the Timer ...................................................................III - 60
Section 4 : Electrical Data.................................................................. IV - 1
1. Outdoor Unit ....................................................................................................... IV - 2
2. Indoor Unit .......................................................................................................... IV -10
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