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.
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| Operation lamp does not illuminate. |
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| The compressor (only) does not operate. | The compressor stops on occasion. | The compressor speed does not increase. | The electric expansion valve does |
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| Indoor unit does not operate. |
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| Outdoor unit does not operate. | Outdoor fan dose not turn. |
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| Operation lamp blinking. | Indoor fan dose not turn. |
| Does not cool or cooling | Inspection | |||||||||
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| Inspection | not operate. |
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| Indoor controller |
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| (control unit) |
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| Indoor fan motor |
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unit | Room temperature |
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sensor |
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Heat exchanger |
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temperature sensor |
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| Switch circuit board |
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| Outdoor control circuit |
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| Diode module |
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| HIC |
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| Electrolytic capacitor |
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| Fuse |
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unit | Compressor |
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Outdoor |
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Compressor protective |
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sensor |
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| Outdoor fan motor |
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| Coil thermistor |
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| Electric expansion valve |
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| Branch tubing |
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| (7) |
| temperature sensor |
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