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1. SPECIFICATIONS

1-1 Unit specifications 4

1-2 Major Component specifications 7

1-3 Other Component specifications 10

2. DIMENSIONAL DATA

3. ELECTRICAL DATA

3-1 Electric Wiring Diagram 12

4. FUNCTION

4-1 Room Temperature Control 13

4-2 Cold Draft Prevention (Heating Cycle) 15

4-3 Automatic Fan Speed (Indoor Unit) 16

4-4 Freeze Prevention (Cooling) 17

4-5 Overload Protection (Heating) 18

4-6 Discharge Temperature Control (Cooling and Heating) 19

4-7 Auto Mode for Automatic Heating/Cooling Switching 19

4-8 Automatic Restart after Power Interruption 21

4-9 Electronic Expansion Control Valve 21

4-10 Dehumidifying Operation 21

4-11 Auto-Flap Control (Indoor Unit: 4-Way Air Discharge) 22

4-12 Electronic Expansion Valve 23

4-13 Voltage Detection Control 23

5. TROUBLESHOOTING

6. CHECKING ELECTRICAL COMPONENTS

6-1 Measurement of Insulation Resistance 57

6-2 Checkin

Continuit

of Fuse on PCB Ass'

6-3 Checking Motor Capacitor 58

6-4 Thermistor Characteristic Curve 59

7. P.C.B.

Table of Contents

Argo ASR409VHG User Manual

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