The present invention is intended to provide a process for producing an electrolyte membrane-bonded electrode having excellent power generation property when constitutes an electrode assembly, and a varnish composition for an electrolyte, by the use of which an electrolyte membrane-electrode bonded structure capable of retaining excellent power generation property is obtained. The adjusting mechanism adjusts the plane spring body position via torsion springs which has a relatively large spring constant. The storage controller identifies the particular storage device as faulty for the first storage volume without identifying the particular storage device as faulty for the second storage volume.