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How to distinguish the defective parts
1 When all rooms are not cooled Are timer lamps of the inYes door units in all rooms flashing ? No Press the OPERATION button to start operating the air-conditioner. (One-room operation ON) (Set the cooling mode to 18�C.) No unit operating ? No Yes The cooling cycle is abnormal. Are timer lamps of indoor Check the failure symptom with units in all rooms flashing ? the failure diagnosis mode. No (Check failure with the outdoor unit.)
Yes Is compressor of the outdoor
TROUBLESHOOTING OF CONTROL CIRCUIT
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pressure. Check that the power between the terminal board N and 1 " A TO of the indoor unit is AC 230V, 50Hz.
