(2)If the self-diagnostics function fails to operate

Check the indoor unit.

Is the fuse blown?

Normal

Replace the controller.

No indicators illuminate and the indoor fan does not rotate.

Check the power voltage.

Blown

Replace the circuit board or the fuse.

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Image 49
Panasonic CS-KS18NKU, CU-KS18NKU service manual Normal, Replace the controller, Replace the circuit board or the fuse