9. OPERATION FLOWCHARTS
9-1-1. Starting Flowchart
| Cool • Dry |
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| Operation starts |
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| Troubleshoot |
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| Operation lamp light | ON |
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1 | Flap motor | ON |
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| Dry |
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| NO | ||||
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| Room temp. ≥ Preset | Room temp. ≥ Preset | ||||
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Room temp. ≥ 15°C
9-1-2. Stopping Flowchart
Operation starts
Operation lamp | Light OFF |
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Compressor | OFF |
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Indoor fan | OFF |
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Outdoor fan | OFF |
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9-1-3. Check Refrigerant Cycle Flowchart
2 |
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| +2 | +2 |
Indoor fan: Start speed ON |
| Outdoor fan motor | OFF | |||
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| Compressor | OFF |
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Cooling operation
Cooling
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| YES |
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| YES | |
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| NO |
| Cooling |
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| Dry A | |
Room temp. higher |
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| Indoor fan |
| Indoor fan | Low & | |||
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than preset temp. |
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| very low | |
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| Outdoor fan motor ON |
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YES | Compressor | Outdoor fan motor |
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| ON |
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| Compressor |
YES |
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Coil thermistor | NO |
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(higher than 46°F) |
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Compressor | OFF |
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Outdoor fan motor | OFF |
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| YES | |
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Dry B |
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Indoor fan |
| Low & | |
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Outdoor fan motor |
| 3 min. ON | |
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| 9 min. OFF |
Compressor |
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| Intermittent | ||
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Monitor
Indoor fan
Outdoor fan motor OFF
Compressor
temp. lower than
14 to 18°F
YES
Current
(8.5A)
YES
Pressure at service port (86 to 128psi)
YES
Refrigerant shortage
Capillary tube blockage
NO
NO
NO
Normal
Obstructed heat exchanger
refrigerant
Compressor failure
Troubleshoot
| Coil thermistor |
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| Outdoor fan motor | OFF |
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| (higher than 36°F) |
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| YES |
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| Flap motor |
| OFF |
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| 3 min. timer |
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| Indoor fan |
| OFF |
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| Indoor power relay | OFF |
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| All lamps | Light OFF |
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| Operation starts |
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| Outdoor power relay | ON |
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18 |
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Outdoor fan motor | ON |
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| Compressor | ON |
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| Compressor |
| OFF |
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| NO |
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| 19 |
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| Overload relay works |
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| Cooling |
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| Dry |
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| YES |
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| YES |
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Safety device works
9-1-4. Time Flowchart
ON timer
Cool
Dry
Heat
Remote control unit
OFF timer set
Timer lamp | Light ON |
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NO |
Timer passes |
YES
Timer lamp | Light OFF | |
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Operation lamp | Light OFF | |
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Cool
Stop dry
Heat
OFF timer
Remote control unit
OFF timer set
Timer lamp | Light ON |
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NO
Timer passes
YES
Timer lamp | Light OFF |
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Cool
Dry
Heat
42
