8-4. Trouble Diagnosis of Each Part
8-4-1. Problems of Each Part and Inspection Points
For details about the inspection points, refer to the Inspection Points for Each Part.
Problems
Inspection
points
| Indoor controller | |
| (control unit) | |
| Indoor fan motor | |
unit | Room temperature | |
sensor | ||
Indoor | ||
Heat exchanger | ||
temperature sensor | ||
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| Switch circuit board | |
| Outdoor control circuit | |
| board | |
| Diode module | |
| HIC | |
| Electrolytic capacitor | |
| Fuse | |
unit | Compressor | |
Outdoor | ||
Compressor protective | ||
| sensor | |
| Outdoor fan motor | |
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| Coil thermistor | |
| Electric expansion valve | |
| Branch tubing | |
| temperature sensor | |
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| Indoor unit |
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| Outdoor unit |
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| Others | ||||||
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Indoor unit does not operate. |
| Operation lamp blinking. | Operation lamp does not illuminate. |
| Indoor fan dose not turn. | Outdoor unit does not operate. | Outdoor fan dose not turn. | The compressor (only) does not operate. | The compressor stops on occasion. | The compressor speed does not increase. | The outdoor air temperature is high, however defrost operation occurs. | Defrost operation does not occur. | The electric expansion valve does not operate. | Does not cool or cooling performance is inadequate. | Does not heat or heating performance is inadequate. | |
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No. of Inspection Points for Each part
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
83
