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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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| performance is inadequate. | No. of | |||||
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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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Others | Breaker |
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| (8) |
Refrigerant gas pressure |
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| (9) | |
8-4-2. Inspection Points for Each Part
(1) Outdoor control circuit board
Refer to
NOTE Do not remove or insert the outdoor control circuit board connector when power is being supplied to it.
(The controller will be damaged.)
(2) Fuse
Check it visually or the continuity with a tester.
(3) Compressor
Check for an open circuit in the compressor coil winding.
(4) Compressor protective sensor (compressor discharge temperature thermistor)
Check that the senseor is securely contained in the thermostart holder.
(5) Coil thermistor
Check that the sensor is securely contained in the thermostat holder.
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