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Voltage reading problem using LTC6804-1

I'm trying to read cell voltages from a battery pack using DC1894B with LTC6804-1.

I connected 5 cells to the DC1894B board.

Voltages of all the cells are over 3.6V.

But what I received is below

I thought my board was broken, then I changed it to a new one. 

But the results are same.

Is there another way to read cell voltages or setting??

Please kindly let me know how to do..

I'll wait for your reply!

Best regards.