This manual covers safety precautions, flow‑characteristics, technical specifications, model designation and troubleshooting for the SMC VXD21/22/23 series pilot‑type 2‑way solenoid valves. It includes detailed instructions for installation, wiring options, and recommended maintenance procedures.
The document also provides guidance on suitable fluids, environmental limits, and recommended parts such as sealing materials and wire gauges. Troubleshooting tables list common faults and corrective actions for both normally‑closed (N.C.) and normally‑open (N.O.) configurations. This manual is written in Japanese.